./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW --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 74af1dedb866c1cce8309a0a9038778cf2a5022a8ca1e36436d718ac447379c8 --- 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-4e7fbc6 [2022-11-23 15:31:04,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:31:04,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:31:04,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:31:04,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:31:04,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:31:04,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:31:04,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:31:04,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:31:04,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:31:04,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:31:04,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:31:04,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:31:04,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:31:04,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:31:04,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:31:04,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:31:04,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:31:04,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:31:04,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:31:04,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:31:04,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:31:04,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:31:04,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:31:04,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:31:04,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:31:04,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:31:04,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:31:04,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:31:04,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:31:04,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:31:04,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:31:04,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:31:04,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:31:04,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:31:04,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:31:04,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:31:04,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:31:04,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:31:04,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:31:04,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:31:04,411 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:31:04,481 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:31:04,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:31:04,482 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:31:04,483 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:31:04,484 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:31:04,484 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:31:04,484 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:31:04,484 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:31:04,485 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:31:04,485 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:31:04,486 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:31:04,486 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:31:04,487 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:31:04,487 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:31:04,487 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:31:04,487 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:31:04,488 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:31:04,488 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:31:04,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:31:04,489 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:31:04,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:31:04,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:31:04,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:31:04,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:31:04,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:31:04,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:31:04,491 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:31:04,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:31:04,492 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:31:04,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:31:04,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:31:04,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:31:04,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:31:04,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:31:04,493 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:31:04,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:31:04,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:31:04,494 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:31:04,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:31:04,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:31:04,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:31:04,495 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_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74af1dedb866c1cce8309a0a9038778cf2a5022a8ca1e36436d718ac447379c8 [2022-11-23 15:31:04,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:31:04,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:31:04,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:31:04,887 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:31:04,887 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:31:04,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-23 15:31:08,385 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:31:08,734 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:31:08,735 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-23 15:31:08,750 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW/data/f5a27bd58/8aa2949231cc4da5b6f902485fcc6a9d/FLAG55fcb8a4b [2022-11-23 15:31:08,772 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW/data/f5a27bd58/8aa2949231cc4da5b6f902485fcc6a9d [2022-11-23 15:31:08,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:31:08,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:31:08,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:31:08,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:31:08,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:31:08,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:31:08" (1/1) ... [2022-11-23 15:31:08,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@389085cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:08, skipping insertion in model container [2022-11-23 15:31:08,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:31:08" (1/1) ... [2022-11-23 15:31:08,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:31:08,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:31:09,212 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_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12986,12999] [2022-11-23 15:31:09,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:31:09,333 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:31:09,441 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_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12986,12999] [2022-11-23 15:31:09,504 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:31:09,529 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:31:09,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:09 WrapperNode [2022-11-23 15:31:09,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:31:09,531 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:31:09,532 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:31:09,532 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:31:09,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:09" (1/1) ... [2022-11-23 15:31:09,560 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:09" (1/1) ... [2022-11-23 15:31:09,619 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1297 [2022-11-23 15:31:09,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:31:09,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:31:09,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:31:09,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:31:09,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:09" (1/1) ... [2022-11-23 15:31:09,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:09" (1/1) ... [2022-11-23 15:31:09,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:09" (1/1) ... [2022-11-23 15:31:09,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:09" (1/1) ... [2022-11-23 15:31:09,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:09" (1/1) ... [2022-11-23 15:31:09,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:09" (1/1) ... [2022-11-23 15:31:09,687 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:09" (1/1) ... [2022-11-23 15:31:09,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:09" (1/1) ... [2022-11-23 15:31:09,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:31:09,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:31:09,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:31:09,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:31:09,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:09" (1/1) ... [2022-11-23 15:31:09,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:31:09,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:31:09,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:31:09,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:31:09,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:31:09,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:31:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:31:09,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:31:10,097 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:31:10,101 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:31:11,539 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:31:12,045 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:31:12,046 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 15:31:12,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:31:12 BoogieIcfgContainer [2022-11-23 15:31:12,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:31:12,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:31:12,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:31:12,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:31:12,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:31:08" (1/3) ... [2022-11-23 15:31:12,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78892ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:31:12, skipping insertion in model container [2022-11-23 15:31:12,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:09" (2/3) ... [2022-11-23 15:31:12,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78892ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:31:12, skipping insertion in model container [2022-11-23 15:31:12,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:31:12" (3/3) ... [2022-11-23 15:31:12,067 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-23 15:31:12,094 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:31:12,094 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:31:12,193 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:31:12,202 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;@64d8453e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:31:12,203 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:31:12,211 INFO L276 IsEmpty]: Start isEmpty. Operand has 255 states, 253 states have (on average 1.6798418972332017) internal successors, (425), 254 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:12,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 15:31:12,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:12,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:12,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:12,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:12,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1325608003, now seen corresponding path program 1 times [2022-11-23 15:31:12,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:12,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702250937] [2022-11-23 15:31:12,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:12,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:13,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:13,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:13,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702250937] [2022-11-23 15:31:13,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702250937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:13,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:13,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:31:13,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100428435] [2022-11-23 15:31:13,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:13,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:31:13,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:13,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:31:13,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:13,155 INFO L87 Difference]: Start difference. First operand has 255 states, 253 states have (on average 1.6798418972332017) internal successors, (425), 254 states have internal predecessors, (425), 0 states have call successors, (0), 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 33.666666666666664) internal successors, (101), 3 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) [2022-11-23 15:31:13,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:13,480 INFO L93 Difference]: Finished difference Result 420 states and 690 transitions. [2022-11-23 15:31:13,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:31:13,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 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) Word has length 101 [2022-11-23 15:31:13,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:13,507 INFO L225 Difference]: With dead ends: 420 [2022-11-23 15:31:13,509 INFO L226 Difference]: Without dead ends: 325 [2022-11-23 15:31:13,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:13,520 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 147 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:13,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 858 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:31:13,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-11-23 15:31:13,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 323. [2022-11-23 15:31:13,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.5372670807453417) internal successors, (495), 322 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 495 transitions. [2022-11-23 15:31:13,622 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 495 transitions. Word has length 101 [2022-11-23 15:31:13,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:13,623 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 495 transitions. [2022-11-23 15:31:13,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 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) [2022-11-23 15:31:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 495 transitions. [2022-11-23 15:31:13,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-23 15:31:13,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:13,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:13,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:31:13,628 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:13,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:13,629 INFO L85 PathProgramCache]: Analyzing trace with hash 672364081, now seen corresponding path program 1 times [2022-11-23 15:31:13,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:13,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670228450] [2022-11-23 15:31:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:13,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:13,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:13,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670228450] [2022-11-23 15:31:13,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670228450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:13,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:13,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:31:13,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623067832] [2022-11-23 15:31:13,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:13,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:31:13,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:13,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:31:13,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:13,964 INFO L87 Difference]: Start difference. First operand 323 states and 495 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:14,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:14,189 INFO L93 Difference]: Finished difference Result 571 states and 897 transitions. [2022-11-23 15:31:14,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:31:14,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2022-11-23 15:31:14,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:14,194 INFO L225 Difference]: With dead ends: 571 [2022-11-23 15:31:14,194 INFO L226 Difference]: Without dead ends: 412 [2022-11-23 15:31:14,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:14,197 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 136 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:14,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 655 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:31:14,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-11-23 15:31:14,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 410. [2022-11-23 15:31:14,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.547677261613692) internal successors, (633), 409 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:14,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 633 transitions. [2022-11-23 15:31:14,243 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 633 transitions. Word has length 103 [2022-11-23 15:31:14,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:14,244 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 633 transitions. [2022-11-23 15:31:14,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:14,245 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 633 transitions. [2022-11-23 15:31:14,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-23 15:31:14,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:14,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:14,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:31:14,249 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:14,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:14,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1922675800, now seen corresponding path program 1 times [2022-11-23 15:31:14,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:14,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593060471] [2022-11-23 15:31:14,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:14,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:14,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:14,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593060471] [2022-11-23 15:31:14,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593060471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:14,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:14,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:31:14,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799161628] [2022-11-23 15:31:14,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:14,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:31:14,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:14,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:31:14,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:14,416 INFO L87 Difference]: Start difference. First operand 410 states and 633 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:14,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:14,638 INFO L93 Difference]: Finished difference Result 849 states and 1344 transitions. [2022-11-23 15:31:14,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:31:14,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2022-11-23 15:31:14,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:14,660 INFO L225 Difference]: With dead ends: 849 [2022-11-23 15:31:14,660 INFO L226 Difference]: Without dead ends: 604 [2022-11-23 15:31:14,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:14,663 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 136 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:14,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 745 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:31:14,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-11-23 15:31:14,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 602. [2022-11-23 15:31:14,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 1.5707154742096505) internal successors, (944), 601 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:14,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 944 transitions. [2022-11-23 15:31:14,747 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 944 transitions. Word has length 106 [2022-11-23 15:31:14,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:14,749 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 944 transitions. [2022-11-23 15:31:14,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:14,750 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 944 transitions. [2022-11-23 15:31:14,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-23 15:31:14,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:14,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:14,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:31:14,760 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:14,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:14,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1327867533, now seen corresponding path program 1 times [2022-11-23 15:31:14,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:14,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703111582] [2022-11-23 15:31:14,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:14,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:15,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:15,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703111582] [2022-11-23 15:31:15,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703111582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:15,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:15,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:31:15,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611100042] [2022-11-23 15:31:15,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:15,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:31:15,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:15,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:31:15,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:15,072 INFO L87 Difference]: Start difference. First operand 602 states and 944 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:15,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:15,297 INFO L93 Difference]: Finished difference Result 1302 states and 2074 transitions. [2022-11-23 15:31:15,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:31:15,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 108 [2022-11-23 15:31:15,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:15,304 INFO L225 Difference]: With dead ends: 1302 [2022-11-23 15:31:15,304 INFO L226 Difference]: Without dead ends: 865 [2022-11-23 15:31:15,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:15,308 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 135 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:15,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 671 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:31:15,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-11-23 15:31:15,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 863. [2022-11-23 15:31:15,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 1.5812064965197217) internal successors, (1363), 862 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1363 transitions. [2022-11-23 15:31:15,402 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1363 transitions. Word has length 108 [2022-11-23 15:31:15,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:15,403 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1363 transitions. [2022-11-23 15:31:15,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:15,403 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1363 transitions. [2022-11-23 15:31:15,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-23 15:31:15,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:15,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:15,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:31:15,405 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:15,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:15,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1064008304, now seen corresponding path program 1 times [2022-11-23 15:31:15,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:15,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363443013] [2022-11-23 15:31:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:15,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:15,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:15,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363443013] [2022-11-23 15:31:15,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363443013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:15,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:15,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:31:15,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439185113] [2022-11-23 15:31:15,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:15,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:31:15,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:15,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:31:15,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:15,551 INFO L87 Difference]: Start difference. First operand 863 states and 1363 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:15,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:15,852 INFO L93 Difference]: Finished difference Result 2070 states and 3318 transitions. [2022-11-23 15:31:15,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:31:15,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2022-11-23 15:31:15,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:15,860 INFO L225 Difference]: With dead ends: 2070 [2022-11-23 15:31:15,860 INFO L226 Difference]: Without dead ends: 1390 [2022-11-23 15:31:15,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:15,864 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 130 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:15,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 718 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:31:15,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2022-11-23 15:31:16,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1388. [2022-11-23 15:31:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 1.592645998558039) internal successors, (2209), 1387 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:16,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2209 transitions. [2022-11-23 15:31:16,113 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2209 transitions. Word has length 111 [2022-11-23 15:31:16,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:16,114 INFO L495 AbstractCegarLoop]: Abstraction has 1388 states and 2209 transitions. [2022-11-23 15:31:16,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:16,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2209 transitions. [2022-11-23 15:31:16,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 15:31:16,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:16,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:16,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:31:16,117 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:16,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:16,118 INFO L85 PathProgramCache]: Analyzing trace with hash -877927785, now seen corresponding path program 1 times [2022-11-23 15:31:16,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:16,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561632593] [2022-11-23 15:31:16,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:16,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:16,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:16,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561632593] [2022-11-23 15:31:16,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561632593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:16,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:16,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:31:16,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336043540] [2022-11-23 15:31:16,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:16,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:31:16,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:16,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:31:16,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:16,269 INFO L87 Difference]: Start difference. First operand 1388 states and 2209 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 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) [2022-11-23 15:31:16,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:16,665 INFO L93 Difference]: Finished difference Result 3291 states and 5280 transitions. [2022-11-23 15:31:16,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:31:16,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-11-23 15:31:16,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:16,674 INFO L225 Difference]: With dead ends: 3291 [2022-11-23 15:31:16,675 INFO L226 Difference]: Without dead ends: 2086 [2022-11-23 15:31:16,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:16,678 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 129 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:16,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 673 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:31:16,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2022-11-23 15:31:16,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 2084. [2022-11-23 15:31:16,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 1.5962554008641383) internal successors, (3325), 2083 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:16,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 3325 transitions. [2022-11-23 15:31:16,918 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 3325 transitions. Word has length 113 [2022-11-23 15:31:16,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:16,919 INFO L495 AbstractCegarLoop]: Abstraction has 2084 states and 3325 transitions. [2022-11-23 15:31:16,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 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) [2022-11-23 15:31:16,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 3325 transitions. [2022-11-23 15:31:16,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-23 15:31:16,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:16,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:16,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:31:16,922 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:16,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:16,922 INFO L85 PathProgramCache]: Analyzing trace with hash -2114041290, now seen corresponding path program 1 times [2022-11-23 15:31:16,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:16,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389862660] [2022-11-23 15:31:16,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:16,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:17,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:17,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389862660] [2022-11-23 15:31:17,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389862660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:17,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:17,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:31:17,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846649969] [2022-11-23 15:31:17,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:17,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:31:17,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:17,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:31:17,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:17,050 INFO L87 Difference]: Start difference. First operand 2084 states and 3325 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:17,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:17,670 INFO L93 Difference]: Finished difference Result 5391 states and 8664 transitions. [2022-11-23 15:31:17,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:31:17,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-23 15:31:17,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:17,686 INFO L225 Difference]: With dead ends: 5391 [2022-11-23 15:31:17,687 INFO L226 Difference]: Without dead ends: 3508 [2022-11-23 15:31:17,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:17,691 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 124 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:17,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 691 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:31:17,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3508 states. [2022-11-23 15:31:18,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3508 to 3506. [2022-11-23 15:31:18,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 1.5982881597717546) internal successors, (5602), 3505 states have internal predecessors, (5602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:18,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 5602 transitions. [2022-11-23 15:31:18,176 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 5602 transitions. Word has length 116 [2022-11-23 15:31:18,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:18,176 INFO L495 AbstractCegarLoop]: Abstraction has 3506 states and 5602 transitions. [2022-11-23 15:31:18,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:18,177 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 5602 transitions. [2022-11-23 15:31:18,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-23 15:31:18,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:18,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:18,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:31:18,179 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:18,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:18,180 INFO L85 PathProgramCache]: Analyzing trace with hash 2139714335, now seen corresponding path program 1 times [2022-11-23 15:31:18,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:18,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859979002] [2022-11-23 15:31:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:18,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:18,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:18,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859979002] [2022-11-23 15:31:18,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859979002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:18,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:18,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:31:18,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566264327] [2022-11-23 15:31:18,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:18,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:31:18,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:18,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:31:18,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:18,341 INFO L87 Difference]: Start difference. First operand 3506 states and 5602 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:19,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:19,065 INFO L93 Difference]: Finished difference Result 8712 states and 13974 transitions. [2022-11-23 15:31:19,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:31:19,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 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 118 [2022-11-23 15:31:19,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:19,094 INFO L225 Difference]: With dead ends: 8712 [2022-11-23 15:31:19,095 INFO L226 Difference]: Without dead ends: 5407 [2022-11-23 15:31:19,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:19,101 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 123 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:19,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 675 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:31:19,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5407 states. [2022-11-23 15:31:19,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5407 to 5405. [2022-11-23 15:31:19,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5405 states, 5404 states have (on average 1.5978904515173946) internal successors, (8635), 5404 states have internal predecessors, (8635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:19,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5405 states to 5405 states and 8635 transitions. [2022-11-23 15:31:19,790 INFO L78 Accepts]: Start accepts. Automaton has 5405 states and 8635 transitions. Word has length 118 [2022-11-23 15:31:19,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:19,791 INFO L495 AbstractCegarLoop]: Abstraction has 5405 states and 8635 transitions. [2022-11-23 15:31:19,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:19,792 INFO L276 IsEmpty]: Start isEmpty. Operand 5405 states and 8635 transitions. [2022-11-23 15:31:19,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-23 15:31:19,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:19,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:19,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:31:19,794 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:19,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:19,795 INFO L85 PathProgramCache]: Analyzing trace with hash 949471684, now seen corresponding path program 1 times [2022-11-23 15:31:19,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:19,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014972768] [2022-11-23 15:31:19,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:19,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:20,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:20,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014972768] [2022-11-23 15:31:20,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014972768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:20,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:20,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:31:20,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147580248] [2022-11-23 15:31:20,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:20,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:31:20,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:20,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:31:20,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:31:20,067 INFO L87 Difference]: Start difference. First operand 5405 states and 8635 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:21,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:21,757 INFO L93 Difference]: Finished difference Result 13488 states and 21561 transitions. [2022-11-23 15:31:21,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:31:21,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2022-11-23 15:31:21,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:21,795 INFO L225 Difference]: With dead ends: 13488 [2022-11-23 15:31:21,795 INFO L226 Difference]: Without dead ends: 8302 [2022-11-23 15:31:21,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:31:21,806 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 1045 mSDsluCounter, 2747 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 3105 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:21,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1045 Valid, 3105 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:31:21,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8302 states. [2022-11-23 15:31:22,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8302 to 8288. [2022-11-23 15:31:22,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5888741402196211) internal successors, (13167), 8287 states have internal predecessors, (13167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:22,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13167 transitions. [2022-11-23 15:31:22,884 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13167 transitions. Word has length 121 [2022-11-23 15:31:22,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:22,885 INFO L495 AbstractCegarLoop]: Abstraction has 8288 states and 13167 transitions. [2022-11-23 15:31:22,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13167 transitions. [2022-11-23 15:31:22,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-23 15:31:22,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:22,888 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:22,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:31:22,889 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:22,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:22,895 INFO L85 PathProgramCache]: Analyzing trace with hash -698210882, now seen corresponding path program 1 times [2022-11-23 15:31:22,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:22,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163463195] [2022-11-23 15:31:22,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:22,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:23,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:23,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163463195] [2022-11-23 15:31:23,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163463195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:23,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:23,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:31:23,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604525532] [2022-11-23 15:31:23,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:23,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:31:23,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:23,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:31:23,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:31:23,159 INFO L87 Difference]: Start difference. First operand 8288 states and 13167 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:24,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:24,671 INFO L93 Difference]: Finished difference Result 16359 states and 26017 transitions. [2022-11-23 15:31:24,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:31:24,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2022-11-23 15:31:24,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:24,704 INFO L225 Difference]: With dead ends: 16359 [2022-11-23 15:31:24,704 INFO L226 Difference]: Without dead ends: 8290 [2022-11-23 15:31:24,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:31:24,717 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 255 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:24,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 1006 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:31:24,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2022-11-23 15:31:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2022-11-23 15:31:25,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5847713285869434) internal successors, (13133), 8287 states have internal predecessors, (13133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:25,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13133 transitions. [2022-11-23 15:31:25,529 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13133 transitions. Word has length 122 [2022-11-23 15:31:25,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:25,529 INFO L495 AbstractCegarLoop]: Abstraction has 8288 states and 13133 transitions. [2022-11-23 15:31:25,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:25,530 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13133 transitions. [2022-11-23 15:31:25,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-23 15:31:25,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:25,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:25,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 15:31:25,532 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:25,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:25,533 INFO L85 PathProgramCache]: Analyzing trace with hash -232204853, now seen corresponding path program 1 times [2022-11-23 15:31:25,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:25,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452655493] [2022-11-23 15:31:25,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:25,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:25,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:25,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452655493] [2022-11-23 15:31:25,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452655493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:25,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:25,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:31:25,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808378446] [2022-11-23 15:31:25,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:25,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:31:25,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:25,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:31:25,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:31:25,676 INFO L87 Difference]: Start difference. First operand 8288 states and 13133 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:26,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:26,733 INFO L93 Difference]: Finished difference Result 16359 states and 25949 transitions. [2022-11-23 15:31:26,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:31:26,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2022-11-23 15:31:26,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:26,763 INFO L225 Difference]: With dead ends: 16359 [2022-11-23 15:31:26,763 INFO L226 Difference]: Without dead ends: 8290 [2022-11-23 15:31:26,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:31:26,774 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 263 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:26,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 1012 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:31:26,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2022-11-23 15:31:27,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2022-11-23 15:31:27,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5806685169542658) internal successors, (13099), 8287 states have internal predecessors, (13099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:27,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13099 transitions. [2022-11-23 15:31:27,634 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13099 transitions. Word has length 123 [2022-11-23 15:31:27,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:27,635 INFO L495 AbstractCegarLoop]: Abstraction has 8288 states and 13099 transitions. [2022-11-23 15:31:27,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:27,636 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13099 transitions. [2022-11-23 15:31:27,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 15:31:27,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:27,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:27,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 15:31:27,638 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:27,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:27,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1333638181, now seen corresponding path program 1 times [2022-11-23 15:31:27,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:27,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617426065] [2022-11-23 15:31:27,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:27,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:27,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:27,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617426065] [2022-11-23 15:31:27,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617426065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:27,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:27,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:31:27,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585301029] [2022-11-23 15:31:27,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:27,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:31:27,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:27,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:31:27,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:31:27,809 INFO L87 Difference]: Start difference. First operand 8288 states and 13099 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:28,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:28,937 INFO L93 Difference]: Finished difference Result 16359 states and 25881 transitions. [2022-11-23 15:31:28,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:31:28,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2022-11-23 15:31:28,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:28,961 INFO L225 Difference]: With dead ends: 16359 [2022-11-23 15:31:28,961 INFO L226 Difference]: Without dead ends: 8290 [2022-11-23 15:31:28,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:31:28,974 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 261 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:28,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 1015 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:31:28,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2022-11-23 15:31:29,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2022-11-23 15:31:29,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.576565705321588) internal successors, (13065), 8287 states have internal predecessors, (13065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13065 transitions. [2022-11-23 15:31:29,737 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13065 transitions. Word has length 124 [2022-11-23 15:31:29,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:29,737 INFO L495 AbstractCegarLoop]: Abstraction has 8288 states and 13065 transitions. [2022-11-23 15:31:29,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:29,738 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13065 transitions. [2022-11-23 15:31:29,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-23 15:31:29,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:29,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:29,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 15:31:29,740 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:29,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:29,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1660277294, now seen corresponding path program 1 times [2022-11-23 15:31:29,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:29,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866015794] [2022-11-23 15:31:29,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:29,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:29,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:29,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866015794] [2022-11-23 15:31:29,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866015794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:29,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:29,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:31:29,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896525576] [2022-11-23 15:31:29,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:29,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:31:29,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:29,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:31:29,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:31:29,872 INFO L87 Difference]: Start difference. First operand 8288 states and 13065 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:30,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:30,683 INFO L93 Difference]: Finished difference Result 16359 states and 25813 transitions. [2022-11-23 15:31:30,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:31:30,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2022-11-23 15:31:30,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:30,710 INFO L225 Difference]: With dead ends: 16359 [2022-11-23 15:31:30,710 INFO L226 Difference]: Without dead ends: 8290 [2022-11-23 15:31:30,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:31:30,724 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 259 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:30,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 1018 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:31:30,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2022-11-23 15:31:31,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2022-11-23 15:31:31,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5724628936889102) internal successors, (13031), 8287 states have internal predecessors, (13031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13031 transitions. [2022-11-23 15:31:31,590 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13031 transitions. Word has length 125 [2022-11-23 15:31:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:31,591 INFO L495 AbstractCegarLoop]: Abstraction has 8288 states and 13031 transitions. [2022-11-23 15:31:31,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:31,591 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13031 transitions. [2022-11-23 15:31:31,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-23 15:31:31,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:31,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:31,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 15:31:31,594 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:31,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:31,594 INFO L85 PathProgramCache]: Analyzing trace with hash 684049603, now seen corresponding path program 1 times [2022-11-23 15:31:31,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:31,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677829193] [2022-11-23 15:31:31,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:31,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:31,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:31,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677829193] [2022-11-23 15:31:31,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677829193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:31,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:31,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:31:31,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284820642] [2022-11-23 15:31:31,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:31,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:31:31,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:31,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:31:31,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:31:31,925 INFO L87 Difference]: Start difference. First operand 8288 states and 13031 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:33,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:33,161 INFO L93 Difference]: Finished difference Result 16359 states and 25745 transitions. [2022-11-23 15:31:33,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:31:33,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2022-11-23 15:31:33,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:33,184 INFO L225 Difference]: With dead ends: 16359 [2022-11-23 15:31:33,184 INFO L226 Difference]: Without dead ends: 8290 [2022-11-23 15:31:33,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:31:33,196 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 232 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:33,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 1640 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:31:33,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2022-11-23 15:31:34,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2022-11-23 15:31:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5705321588029444) internal successors, (13015), 8287 states have internal predecessors, (13015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13015 transitions. [2022-11-23 15:31:34,388 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13015 transitions. Word has length 127 [2022-11-23 15:31:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:34,389 INFO L495 AbstractCegarLoop]: Abstraction has 8288 states and 13015 transitions. [2022-11-23 15:31:34,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:34,389 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13015 transitions. [2022-11-23 15:31:34,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 15:31:34,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:34,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:34,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 15:31:34,392 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:34,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:34,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1148518135, now seen corresponding path program 1 times [2022-11-23 15:31:34,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:34,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265891701] [2022-11-23 15:31:34,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:34,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:34,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:34,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265891701] [2022-11-23 15:31:34,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265891701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:34,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:34,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:31:34,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645036780] [2022-11-23 15:31:34,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:34,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:31:34,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:34,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:31:34,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:31:34,778 INFO L87 Difference]: Start difference. First operand 8288 states and 13015 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:36,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:36,302 INFO L93 Difference]: Finished difference Result 20553 states and 32209 transitions. [2022-11-23 15:31:36,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:31:36,302 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2022-11-23 15:31:36,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:36,328 INFO L225 Difference]: With dead ends: 20553 [2022-11-23 15:31:36,328 INFO L226 Difference]: Without dead ends: 12484 [2022-11-23 15:31:36,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:31:36,340 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 438 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:36,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 1346 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:31:36,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12484 states. [2022-11-23 15:31:37,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12484 to 12482. [2022-11-23 15:31:37,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12482 states, 12481 states have (on average 1.5613332265042865) internal successors, (19487), 12481 states have internal predecessors, (19487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:37,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12482 states to 12482 states and 19487 transitions. [2022-11-23 15:31:37,681 INFO L78 Accepts]: Start accepts. Automaton has 12482 states and 19487 transitions. Word has length 130 [2022-11-23 15:31:37,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:37,682 INFO L495 AbstractCegarLoop]: Abstraction has 12482 states and 19487 transitions. [2022-11-23 15:31:37,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:37,682 INFO L276 IsEmpty]: Start isEmpty. Operand 12482 states and 19487 transitions. [2022-11-23 15:31:37,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-23 15:31:37,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:37,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:37,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 15:31:37,685 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:37,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:37,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1277687264, now seen corresponding path program 1 times [2022-11-23 15:31:37,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:37,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609178769] [2022-11-23 15:31:37,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:37,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:38,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:38,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609178769] [2022-11-23 15:31:38,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609178769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:38,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:38,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:31:38,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005830836] [2022-11-23 15:31:38,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:38,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:31:38,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:38,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:31:38,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:31:38,189 INFO L87 Difference]: Start difference. First operand 12482 states and 19487 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:40,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:40,215 INFO L93 Difference]: Finished difference Result 15360 states and 23868 transitions. [2022-11-23 15:31:40,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:31:40,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2022-11-23 15:31:40,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:40,236 INFO L225 Difference]: With dead ends: 15360 [2022-11-23 15:31:40,236 INFO L226 Difference]: Without dead ends: 15358 [2022-11-23 15:31:40,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:31:40,239 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 371 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 2151 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:40,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 2151 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:31:40,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15358 states. [2022-11-23 15:31:41,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15358 to 12496. [2022-11-23 15:31:41,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12496 states, 12495 states have (on average 1.5591036414565826) internal successors, (19481), 12495 states have internal predecessors, (19481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:41,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12496 states to 12496 states and 19481 transitions. [2022-11-23 15:31:41,530 INFO L78 Accepts]: Start accepts. Automaton has 12496 states and 19481 transitions. Word has length 131 [2022-11-23 15:31:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:41,531 INFO L495 AbstractCegarLoop]: Abstraction has 12496 states and 19481 transitions. [2022-11-23 15:31:41,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:41,531 INFO L276 IsEmpty]: Start isEmpty. Operand 12496 states and 19481 transitions. [2022-11-23 15:31:41,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-23 15:31:41,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:41,532 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:41,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 15:31:41,533 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:41,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:41,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1212519615, now seen corresponding path program 1 times [2022-11-23 15:31:41,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:41,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552086891] [2022-11-23 15:31:41,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:41,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:43,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:31:43,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:43,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552086891] [2022-11-23 15:31:43,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552086891] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:31:43,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287225074] [2022-11-23 15:31:43,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:43,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:31:43,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:31:43,567 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:31:43,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:31:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:43,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 15:31:43,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:31:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:31:44,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:31:44,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287225074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:44,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:31:44,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2022-11-23 15:31:44,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742959341] [2022-11-23 15:31:44,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:44,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:31:44,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:44,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:31:44,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:31:44,141 INFO L87 Difference]: Start difference. First operand 12496 states and 19481 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:47,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:47,688 INFO L93 Difference]: Finished difference Result 36774 states and 57377 transitions. [2022-11-23 15:31:47,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:31:47,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2022-11-23 15:31:47,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:47,729 INFO L225 Difference]: With dead ends: 36774 [2022-11-23 15:31:47,729 INFO L226 Difference]: Without dead ends: 24495 [2022-11-23 15:31:47,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-23 15:31:47,741 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 817 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:47,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [817 Valid, 745 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:31:47,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24495 states. [2022-11-23 15:31:50,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24495 to 24493. [2022-11-23 15:31:50,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24493 states, 24492 states have (on average 1.555528335783113) internal successors, (38098), 24492 states have internal predecessors, (38098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:50,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24493 states to 24493 states and 38098 transitions. [2022-11-23 15:31:50,398 INFO L78 Accepts]: Start accepts. Automaton has 24493 states and 38098 transitions. Word has length 139 [2022-11-23 15:31:50,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:50,399 INFO L495 AbstractCegarLoop]: Abstraction has 24493 states and 38098 transitions. [2022-11-23 15:31:50,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:50,399 INFO L276 IsEmpty]: Start isEmpty. Operand 24493 states and 38098 transitions. [2022-11-23 15:31:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-23 15:31:50,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:50,401 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:50,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 15:31:50,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 15:31:50,602 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:50,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:50,603 INFO L85 PathProgramCache]: Analyzing trace with hash 93144951, now seen corresponding path program 1 times [2022-11-23 15:31:50,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:50,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967974773] [2022-11-23 15:31:50,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:50,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:31:50,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:50,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967974773] [2022-11-23 15:31:50,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967974773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:50,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:50,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:31:50,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581366945] [2022-11-23 15:31:50,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:50,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:31:50,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:50,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:31:50,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:50,688 INFO L87 Difference]: Start difference. First operand 24493 states and 38098 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:56,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:56,749 INFO L93 Difference]: Finished difference Result 73403 states and 114171 transitions. [2022-11-23 15:31:56,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:31:56,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-11-23 15:31:56,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:56,839 INFO L225 Difference]: With dead ends: 73403 [2022-11-23 15:31:56,839 INFO L226 Difference]: Without dead ends: 48949 [2022-11-23 15:31:56,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:56,863 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 318 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:56,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 688 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:31:56,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48949 states. [2022-11-23 15:32:00,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48949 to 24500. [2022-11-23 15:32:00,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24500 states, 24499 states have (on average 1.5554512429078737) internal successors, (38107), 24499 states have internal predecessors, (38107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:32:00,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24500 states to 24500 states and 38107 transitions. [2022-11-23 15:32:00,951 INFO L78 Accepts]: Start accepts. Automaton has 24500 states and 38107 transitions. Word has length 141 [2022-11-23 15:32:00,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:32:00,952 INFO L495 AbstractCegarLoop]: Abstraction has 24500 states and 38107 transitions. [2022-11-23 15:32:00,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:32:00,952 INFO L276 IsEmpty]: Start isEmpty. Operand 24500 states and 38107 transitions. [2022-11-23 15:32:00,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-23 15:32:00,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:32:00,954 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:32:00,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 15:32:00,954 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:32:00,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:32:00,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1611567089, now seen corresponding path program 1 times [2022-11-23 15:32:00,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:32:00,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899128176] [2022-11-23 15:32:00,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:32:00,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:32:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:32:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 15:32:01,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:32:01,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899128176] [2022-11-23 15:32:01,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899128176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:32:01,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:32:01,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:32:01,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051715668] [2022-11-23 15:32:01,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:32:01,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:32:01,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:32:01,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:32:01,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:32:01,144 INFO L87 Difference]: Start difference. First operand 24500 states and 38107 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:32:08,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:32:08,311 INFO L93 Difference]: Finished difference Result 71871 states and 111866 transitions. [2022-11-23 15:32:08,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:32:08,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-11-23 15:32:08,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:32:08,401 INFO L225 Difference]: With dead ends: 71871 [2022-11-23 15:32:08,401 INFO L226 Difference]: Without dead ends: 47466 [2022-11-23 15:32:08,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:32:08,432 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 246 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:32:08,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 979 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:32:08,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47466 states. [2022-11-23 15:32:16,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47466 to 47464. [2022-11-23 15:32:16,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47464 states, 47463 states have (on average 1.5491646124349494) internal successors, (73528), 47463 states have internal predecessors, (73528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:32:16,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47464 states to 47464 states and 73528 transitions. [2022-11-23 15:32:16,348 INFO L78 Accepts]: Start accepts. Automaton has 47464 states and 73528 transitions. Word has length 141 [2022-11-23 15:32:16,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:32:16,348 INFO L495 AbstractCegarLoop]: Abstraction has 47464 states and 73528 transitions. [2022-11-23 15:32:16,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:32:16,349 INFO L276 IsEmpty]: Start isEmpty. Operand 47464 states and 73528 transitions. [2022-11-23 15:32:16,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-23 15:32:16,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:32:16,353 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:32:16,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 15:32:16,353 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:32:16,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:32:16,354 INFO L85 PathProgramCache]: Analyzing trace with hash -2143711910, now seen corresponding path program 1 times [2022-11-23 15:32:16,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:32:16,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015027306] [2022-11-23 15:32:16,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:32:16,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:32:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:32:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:32:18,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:32:18,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015027306] [2022-11-23 15:32:18,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015027306] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:32:18,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144131124] [2022-11-23 15:32:18,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:32:18,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:32:18,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:32:18,642 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:32:18,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce9ddd2-202c-4795-b38a-fec5b089a3fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:32:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:32:18,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 15:32:18,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:32:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:32:19,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:32:19,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144131124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:32:19,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:32:19,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2022-11-23 15:32:19,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459117130] [2022-11-23 15:32:19,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:32:19,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:32:19,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:32:19,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:32:19,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:32:19,280 INFO L87 Difference]: Start difference. First operand 47464 states and 73528 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)