./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-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_11b278c7-203d-41ef-a989-f22b83b6f904/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11b278c7-203d-41ef-a989-f22b83b6f904/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_11b278c7-203d-41ef-a989-f22b83b6f904/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11b278c7-203d-41ef-a989-f22b83b6f904/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11b278c7-203d-41ef-a989-f22b83b6f904/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_11b278c7-203d-41ef-a989-f22b83b6f904/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 f299e5c87ef8b927f907740b52cd3b6a05ddc6197a3b61da31c7c3837813d6c6 --- 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 14:07:06,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:07:06,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:07:06,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:07:06,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:07:06,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:07:06,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:07:06,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:07:06,515 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:07:06,516 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:07:06,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:07:06,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:07:06,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:07:06,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:07:06,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:07:06,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:07:06,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:07:06,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:07:06,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:07:06,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:07:06,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:07:06,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:07:06,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:07:06,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:07:06,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:07:06,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:07:06,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:07:06,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:07:06,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:07:06,543 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:07:06,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:07:06,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:07:06,545 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:07:06,546 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:07:06,547 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:07:06,548 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:07:06,549 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:07:06,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:07:06,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:07:06,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:07:06,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:07:06,552 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11b278c7-203d-41ef-a989-f22b83b6f904/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:07:06,575 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:07:06,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:07:06,576 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:07:06,577 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:07:06,577 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:07:06,578 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:07:06,578 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:07:06,578 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:07:06,578 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:07:06,579 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:07:06,579 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:07:06,579 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:07:06,579 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:07:06,580 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:07:06,580 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:07:06,580 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:07:06,581 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:07:06,581 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:07:06,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:07:06,582 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:07:06,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:07:06,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:07:06,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:07:06,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:07:06,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:07:06,584 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:07:06,584 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:07:06,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:07:06,584 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:07:06,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:07:06,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:07:06,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:07:06,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:07:06,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:07:06,586 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:07:06,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:07:06,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:07:06,587 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:07:06,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:07:06,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:07:06,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:07:06,588 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_11b278c7-203d-41ef-a989-f22b83b6f904/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11b278c7-203d-41ef-a989-f22b83b6f904/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f299e5c87ef8b927f907740b52cd3b6a05ddc6197a3b61da31c7c3837813d6c6 [2022-11-23 14:07:06,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:07:06,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:07:06,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:07:06,877 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:07:06,878 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:07:06,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11b278c7-203d-41ef-a989-f22b83b6f904/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-23 14:07:09,956 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:07:10,215 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:07:10,216 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11b278c7-203d-41ef-a989-f22b83b6f904/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-23 14:07:10,240 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11b278c7-203d-41ef-a989-f22b83b6f904/bin/utaipan-Q6hlc19bkW/data/a8c8856e5/ce845041a0154df9af4d4ef4dc84d874/FLAG4a219d73b [2022-11-23 14:07:10,256 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11b278c7-203d-41ef-a989-f22b83b6f904/bin/utaipan-Q6hlc19bkW/data/a8c8856e5/ce845041a0154df9af4d4ef4dc84d874 [2022-11-23 14:07:10,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:07:10,260 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:07:10,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:07:10,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:07:10,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:07:10,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:07:10" (1/1) ... [2022-11-23 14:07:10,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e69f87b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:10, skipping insertion in model container [2022-11-23 14:07:10,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:07:10" (1/1) ... [2022-11-23 14:07:10,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:07:10,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:07:10,589 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_11b278c7-203d-41ef-a989-f22b83b6f904/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9868,9881] [2022-11-23 14:07:10,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:07:10,723 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:07:10,799 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_11b278c7-203d-41ef-a989-f22b83b6f904/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9868,9881] [2022-11-23 14:07:10,854 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:07:10,875 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:07:10,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:10 WrapperNode [2022-11-23 14:07:10,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:07:10,877 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:07:10,877 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:07:10,877 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:07:10,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:10" (1/1) ... [2022-11-23 14:07:10,899 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:10" (1/1) ... [2022-11-23 14:07:10,958 INFO L138 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 920 [2022-11-23 14:07:10,958 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:07:10,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:07:10,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:07:10,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:07:10,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:10" (1/1) ... [2022-11-23 14:07:10,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:10" (1/1) ... [2022-11-23 14:07:10,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:10" (1/1) ... [2022-11-23 14:07:10,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:10" (1/1) ... [2022-11-23 14:07:10,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:10" (1/1) ... [2022-11-23 14:07:10,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:10" (1/1) ... [2022-11-23 14:07:10,997 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:10" (1/1) ... [2022-11-23 14:07:11,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:10" (1/1) ... [2022-11-23 14:07:11,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:07:11,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:07:11,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:07:11,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:07:11,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:10" (1/1) ... [2022-11-23 14:07:11,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:07:11,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11b278c7-203d-41ef-a989-f22b83b6f904/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:11,092 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11b278c7-203d-41ef-a989-f22b83b6f904/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:07:11,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11b278c7-203d-41ef-a989-f22b83b6f904/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:07:11,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:07:11,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:07:11,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:07:11,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:07:11,314 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:07:11,317 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:07:12,258 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:07:12,704 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:07:12,704 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 14:07:12,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:07:12 BoogieIcfgContainer [2022-11-23 14:07:12,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:07:12,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:07:12,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:07:12,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:07:12,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:07:10" (1/3) ... [2022-11-23 14:07:12,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b14112d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:07:12, skipping insertion in model container [2022-11-23 14:07:12,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:10" (2/3) ... [2022-11-23 14:07:12,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b14112d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:07:12, skipping insertion in model container [2022-11-23 14:07:12,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:07:12" (3/3) ... [2022-11-23 14:07:12,729 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-23 14:07:12,753 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:07:12,753 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:07:12,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:07:12,831 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;@6b46275a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:07:12,831 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:07:12,837 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 184 states have (on average 1.7119565217391304) internal successors, (315), 185 states have internal predecessors, (315), 0 states have call successors, (0), 0 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 14:07:12,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-23 14:07:12,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:12,848 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] [2022-11-23 14:07:12,849 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:12,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:12,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1437980373, now seen corresponding path program 1 times [2022-11-23 14:07:12,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:12,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249913820] [2022-11-23 14:07:12,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:12,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:13,901 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 14:07:13,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:13,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249913820] [2022-11-23 14:07:13,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249913820] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:13,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:13,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 14:07:13,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120275290] [2022-11-23 14:07:13,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:13,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:07:13,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:13,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:07:13,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:07:13,958 INFO L87 Difference]: Start difference. First operand has 186 states, 184 states have (on average 1.7119565217391304) internal successors, (315), 185 states have internal predecessors, (315), 0 states have call successors, (0), 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 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 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 14:07:14,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:14,725 INFO L93 Difference]: Finished difference Result 736 states and 1182 transitions. [2022-11-23 14:07:14,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:07:14,731 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2022-11-23 14:07:14,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:14,757 INFO L225 Difference]: With dead ends: 736 [2022-11-23 14:07:14,757 INFO L226 Difference]: Without dead ends: 630 [2022-11-23 14:07:14,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:07:14,767 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 1130 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 1450 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:14,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1130 Valid, 1450 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:07:14,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-11-23 14:07:14,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 620. [2022-11-23 14:07:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 1.4168012924071083) internal successors, (877), 619 states have internal predecessors, (877), 0 states have call successors, (0), 0 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 14:07:14,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 877 transitions. [2022-11-23 14:07:14,984 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 877 transitions. Word has length 80 [2022-11-23 14:07:14,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:14,985 INFO L495 AbstractCegarLoop]: Abstraction has 620 states and 877 transitions. [2022-11-23 14:07:14,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 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 14:07:14,986 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 877 transitions. [2022-11-23 14:07:14,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-23 14:07:14,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:14,998 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] [2022-11-23 14:07:14,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:07:14,999 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:15,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:15,000 INFO L85 PathProgramCache]: Analyzing trace with hash 481584325, now seen corresponding path program 1 times [2022-11-23 14:07:15,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:15,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006854165] [2022-11-23 14:07:15,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:15,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:15,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:15,277 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 14:07:15,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:15,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006854165] [2022-11-23 14:07:15,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006854165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:15,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:15,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:07:15,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819278194] [2022-11-23 14:07:15,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:15,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:07:15,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:15,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:07:15,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:07:15,285 INFO L87 Difference]: Start difference. First operand 620 states and 877 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 14:07:15,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:15,865 INFO L93 Difference]: Finished difference Result 1516 states and 2204 transitions. [2022-11-23 14:07:15,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:07:15,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2022-11-23 14:07:15,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:15,870 INFO L225 Difference]: With dead ends: 1516 [2022-11-23 14:07:15,870 INFO L226 Difference]: Without dead ends: 981 [2022-11-23 14:07:15,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:07:15,882 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 648 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:15,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 264 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:07:15,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-11-23 14:07:16,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 979. [2022-11-23 14:07:16,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 1.4488752556237219) internal successors, (1417), 978 states have internal predecessors, (1417), 0 states have call successors, (0), 0 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 14:07:16,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1417 transitions. [2022-11-23 14:07:16,130 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1417 transitions. Word has length 81 [2022-11-23 14:07:16,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:16,132 INFO L495 AbstractCegarLoop]: Abstraction has 979 states and 1417 transitions. [2022-11-23 14:07:16,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 14:07:16,132 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1417 transitions. [2022-11-23 14:07:16,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-23 14:07:16,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:16,137 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] [2022-11-23 14:07:16,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:07:16,142 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:16,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:16,143 INFO L85 PathProgramCache]: Analyzing trace with hash 498152103, now seen corresponding path program 1 times [2022-11-23 14:07:16,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:16,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372819574] [2022-11-23 14:07:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:16,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:16,369 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 14:07:16,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:16,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372819574] [2022-11-23 14:07:16,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372819574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:16,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:16,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:07:16,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038887329] [2022-11-23 14:07:16,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:16,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:07:16,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:16,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:07:16,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:07:16,373 INFO L87 Difference]: Start difference. First operand 979 states and 1417 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 14:07:16,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:16,994 INFO L93 Difference]: Finished difference Result 2526 states and 3736 transitions. [2022-11-23 14:07:16,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:07:16,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2022-11-23 14:07:16,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:17,003 INFO L225 Difference]: With dead ends: 2526 [2022-11-23 14:07:17,003 INFO L226 Difference]: Without dead ends: 1699 [2022-11-23 14:07:17,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:07:17,013 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 620 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:17,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [620 Valid, 280 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:07:17,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2022-11-23 14:07:17,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1697. [2022-11-23 14:07:17,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 1.4705188679245282) internal successors, (2494), 1696 states have internal predecessors, (2494), 0 states have call successors, (0), 0 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 14:07:17,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 2494 transitions. [2022-11-23 14:07:17,397 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 2494 transitions. Word has length 81 [2022-11-23 14:07:17,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:17,398 INFO L495 AbstractCegarLoop]: Abstraction has 1697 states and 2494 transitions. [2022-11-23 14:07:17,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 14:07:17,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 2494 transitions. [2022-11-23 14:07:17,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-23 14:07:17,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:17,402 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] [2022-11-23 14:07:17,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:07:17,402 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:17,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:17,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2079631928, now seen corresponding path program 1 times [2022-11-23 14:07:17,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:17,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845255626] [2022-11-23 14:07:17,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:17,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:17,620 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 14:07:17,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:17,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845255626] [2022-11-23 14:07:17,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845255626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:17,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:17,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:07:17,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729505965] [2022-11-23 14:07:17,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:17,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:07:17,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:17,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:07:17,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:07:17,626 INFO L87 Difference]: Start difference. First operand 1697 states and 2494 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 14:07:18,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:18,547 INFO L93 Difference]: Finished difference Result 4639 states and 6922 transitions. [2022-11-23 14:07:18,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:07:18,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2022-11-23 14:07:18,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:18,558 INFO L225 Difference]: With dead ends: 4639 [2022-11-23 14:07:18,558 INFO L226 Difference]: Without dead ends: 3135 [2022-11-23 14:07:18,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:07:18,562 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 638 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:18,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 281 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:07:18,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2022-11-23 14:07:19,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 3133. [2022-11-23 14:07:19,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3133 states, 3132 states have (on average 1.4827586206896552) internal successors, (4644), 3132 states have internal predecessors, (4644), 0 states have call successors, (0), 0 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 14:07:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3133 states to 3133 states and 4644 transitions. [2022-11-23 14:07:19,136 INFO L78 Accepts]: Start accepts. Automaton has 3133 states and 4644 transitions. Word has length 81 [2022-11-23 14:07:19,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:19,137 INFO L495 AbstractCegarLoop]: Abstraction has 3133 states and 4644 transitions. [2022-11-23 14:07:19,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 14:07:19,137 INFO L276 IsEmpty]: Start isEmpty. Operand 3133 states and 4644 transitions. [2022-11-23 14:07:19,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-23 14:07:19,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:19,138 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] [2022-11-23 14:07:19,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:07:19,139 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:19,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:19,140 INFO L85 PathProgramCache]: Analyzing trace with hash -786239274, now seen corresponding path program 1 times [2022-11-23 14:07:19,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:19,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289253190] [2022-11-23 14:07:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:19,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:19,323 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 14:07:19,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:19,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289253190] [2022-11-23 14:07:19,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289253190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:19,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:19,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:07:19,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735768364] [2022-11-23 14:07:19,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:19,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:07:19,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:19,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:07:19,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:07:19,329 INFO L87 Difference]: Start difference. First operand 3133 states and 4644 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 14:07:20,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:20,625 INFO L93 Difference]: Finished difference Result 9025 states and 13482 transitions. [2022-11-23 14:07:20,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:07:20,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2022-11-23 14:07:20,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:20,652 INFO L225 Difference]: With dead ends: 9025 [2022-11-23 14:07:20,652 INFO L226 Difference]: Without dead ends: 6007 [2022-11-23 14:07:20,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:07:20,658 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 619 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:20,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 272 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:07:20,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6007 states. [2022-11-23 14:07:21,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6007 to 6005. [2022-11-23 14:07:21,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6005 states, 6004 states have (on average 1.4841772151898733) internal successors, (8911), 6004 states have internal predecessors, (8911), 0 states have call successors, (0), 0 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 14:07:21,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6005 states to 6005 states and 8911 transitions. [2022-11-23 14:07:21,727 INFO L78 Accepts]: Start accepts. Automaton has 6005 states and 8911 transitions. Word has length 81 [2022-11-23 14:07:21,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:21,728 INFO L495 AbstractCegarLoop]: Abstraction has 6005 states and 8911 transitions. [2022-11-23 14:07:21,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 14:07:21,728 INFO L276 IsEmpty]: Start isEmpty. Operand 6005 states and 8911 transitions. [2022-11-23 14:07:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-23 14:07:21,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:21,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:07:21,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:07:21,730 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:21,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:21,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1625296500, now seen corresponding path program 1 times [2022-11-23 14:07:21,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:21,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038423327] [2022-11-23 14:07:21,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:21,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:21,876 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 14:07:21,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:21,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038423327] [2022-11-23 14:07:21,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038423327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:21,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:21,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:07:21,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152860788] [2022-11-23 14:07:21,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:21,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:07:21,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:21,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:07:21,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:07:21,879 INFO L87 Difference]: Start difference. First operand 6005 states and 8911 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 14:07:23,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:23,978 INFO L93 Difference]: Finished difference Result 17694 states and 26360 transitions. [2022-11-23 14:07:23,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:07:23,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2022-11-23 14:07:23,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:24,018 INFO L225 Difference]: With dead ends: 17694 [2022-11-23 14:07:24,018 INFO L226 Difference]: Without dead ends: 11751 [2022-11-23 14:07:24,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:07:24,028 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 635 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:24,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [635 Valid, 256 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:07:24,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11751 states. [2022-11-23 14:07:25,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11751 to 11749. [2022-11-23 14:07:25,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11749 states, 11748 states have (on average 1.477357848144365) internal successors, (17356), 11748 states have internal predecessors, (17356), 0 states have call successors, (0), 0 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 14:07:25,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11749 states to 11749 states and 17356 transitions. [2022-11-23 14:07:25,818 INFO L78 Accepts]: Start accepts. Automaton has 11749 states and 17356 transitions. Word has length 81 [2022-11-23 14:07:25,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:25,818 INFO L495 AbstractCegarLoop]: Abstraction has 11749 states and 17356 transitions. [2022-11-23 14:07:25,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 14:07:25,819 INFO L276 IsEmpty]: Start isEmpty. Operand 11749 states and 17356 transitions. [2022-11-23 14:07:25,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 14:07:25,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:25,820 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] [2022-11-23 14:07:25,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:07:25,820 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:25,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:25,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1266366863, now seen corresponding path program 1 times [2022-11-23 14:07:25,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:25,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658362623] [2022-11-23 14:07:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:25,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:25,946 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 14:07:25,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:25,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658362623] [2022-11-23 14:07:25,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658362623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:25,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:25,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:07:25,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375390386] [2022-11-23 14:07:25,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:25,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:07:25,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:25,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:07:25,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:07:25,949 INFO L87 Difference]: Start difference. First operand 11749 states and 17356 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 14:07:27,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:27,578 INFO L93 Difference]: Finished difference Result 23420 states and 34624 transitions. [2022-11-23 14:07:27,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:07:27,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2022-11-23 14:07:27,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:27,613 INFO L225 Difference]: With dead ends: 23420 [2022-11-23 14:07:27,614 INFO L226 Difference]: Without dead ends: 11749 [2022-11-23 14:07:27,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:07:27,627 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 529 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:27,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 199 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:07:27,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11749 states. [2022-11-23 14:07:29,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11749 to 11749. [2022-11-23 14:07:29,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11749 states, 11748 states have (on average 1.4772727272727273) internal successors, (17355), 11748 states have internal predecessors, (17355), 0 states have call successors, (0), 0 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 14:07:29,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11749 states to 11749 states and 17355 transitions. [2022-11-23 14:07:29,391 INFO L78 Accepts]: Start accepts. Automaton has 11749 states and 17355 transitions. Word has length 82 [2022-11-23 14:07:29,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:29,391 INFO L495 AbstractCegarLoop]: Abstraction has 11749 states and 17355 transitions. [2022-11-23 14:07:29,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 14:07:29,392 INFO L276 IsEmpty]: Start isEmpty. Operand 11749 states and 17355 transitions. [2022-11-23 14:07:29,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 14:07:29,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:29,393 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] [2022-11-23 14:07:29,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:07:29,394 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:29,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:29,394 INFO L85 PathProgramCache]: Analyzing trace with hash -147514495, now seen corresponding path program 1 times [2022-11-23 14:07:29,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:29,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030339206] [2022-11-23 14:07:29,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:29,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:31,995 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 14:07:31,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:31,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030339206] [2022-11-23 14:07:31,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030339206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:31,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:31,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-23 14:07:31,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190309470] [2022-11-23 14:07:31,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:31,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 14:07:31,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:31,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 14:07:31,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:07:31,997 INFO L87 Difference]: Start difference. First operand 11749 states and 17355 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 14:07:37,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:37,021 INFO L93 Difference]: Finished difference Result 25246 states and 37108 transitions. [2022-11-23 14:07:37,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 14:07:37,022 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2022-11-23 14:07:37,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:37,098 INFO L225 Difference]: With dead ends: 25246 [2022-11-23 14:07:37,098 INFO L226 Difference]: Without dead ends: 25244 [2022-11-23 14:07:37,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:07:37,109 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 1228 mSDsluCounter, 2612 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1228 SdHoareTripleChecker+Valid, 2905 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:37,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1228 Valid, 2905 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1219 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 14:07:37,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25244 states. [2022-11-23 14:07:39,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25244 to 18931. [2022-11-23 14:07:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18931 states, 18930 states have (on average 1.4703116745905969) internal successors, (27833), 18930 states have internal predecessors, (27833), 0 states have call successors, (0), 0 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 14:07:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18931 states to 18931 states and 27833 transitions. [2022-11-23 14:07:39,863 INFO L78 Accepts]: Start accepts. Automaton has 18931 states and 27833 transitions. Word has length 82 [2022-11-23 14:07:39,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:39,863 INFO L495 AbstractCegarLoop]: Abstraction has 18931 states and 27833 transitions. [2022-11-23 14:07:39,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 14:07:39,864 INFO L276 IsEmpty]: Start isEmpty. Operand 18931 states and 27833 transitions. [2022-11-23 14:07:39,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 14:07:39,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:39,865 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] [2022-11-23 14:07:39,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:07:39,866 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:39,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:39,866 INFO L85 PathProgramCache]: Analyzing trace with hash -874101823, now seen corresponding path program 1 times [2022-11-23 14:07:39,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:39,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971238878] [2022-11-23 14:07:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:39,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:42,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:42,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971238878] [2022-11-23 14:07:42,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971238878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:42,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:42,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-23 14:07:42,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561483236] [2022-11-23 14:07:42,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:42,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 14:07:42,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:42,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 14:07:42,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:07:42,204 INFO L87 Difference]: Start difference. First operand 18931 states and 27833 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 14:07:47,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:47,278 INFO L93 Difference]: Finished difference Result 25458 states and 37314 transitions. [2022-11-23 14:07:47,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 14:07:47,279 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2022-11-23 14:07:47,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:47,347 INFO L225 Difference]: With dead ends: 25458 [2022-11-23 14:07:47,347 INFO L226 Difference]: Without dead ends: 23216 [2022-11-23 14:07:47,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:07:47,362 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 1142 mSDsluCounter, 2751 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:47,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1142 Valid, 3146 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 14:07:47,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23216 states. [2022-11-23 14:07:50,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23216 to 21004. [2022-11-23 14:07:50,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21004 states, 21003 states have (on average 1.4679807646526686) internal successors, (30832), 21003 states have internal predecessors, (30832), 0 states have call successors, (0), 0 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 14:07:50,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21004 states to 21004 states and 30832 transitions. [2022-11-23 14:07:50,313 INFO L78 Accepts]: Start accepts. Automaton has 21004 states and 30832 transitions. Word has length 82 [2022-11-23 14:07:50,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:50,313 INFO L495 AbstractCegarLoop]: Abstraction has 21004 states and 30832 transitions. [2022-11-23 14:07:50,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 14:07:50,314 INFO L276 IsEmpty]: Start isEmpty. Operand 21004 states and 30832 transitions. [2022-11-23 14:07:50,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 14:07:50,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:50,315 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] [2022-11-23 14:07:50,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:07:50,316 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:50,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:50,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1337027553, now seen corresponding path program 1 times [2022-11-23 14:07:50,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:50,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540527668] [2022-11-23 14:07:50,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:50,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:52,078 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 14:07:52,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:52,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540527668] [2022-11-23 14:07:52,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540527668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:52,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:52,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-23 14:07:52,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019742708] [2022-11-23 14:07:52,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:52,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 14:07:52,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:52,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 14:07:52,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:07:52,080 INFO L87 Difference]: Start difference. First operand 21004 states and 30832 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 14:07:57,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:57,047 INFO L93 Difference]: Finished difference Result 25208 states and 36894 transitions. [2022-11-23 14:07:57,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 14:07:57,047 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2022-11-23 14:07:57,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:57,109 INFO L225 Difference]: With dead ends: 25208 [2022-11-23 14:07:57,109 INFO L226 Difference]: Without dead ends: 25206 [2022-11-23 14:07:57,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:07:57,122 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 1118 mSDsluCounter, 2733 mSDsCounter, 0 mSdLazyCounter, 1758 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 3113 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:57,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1118 Valid, 3113 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1758 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-23 14:07:57,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25206 states. [2022-11-23 14:08:00,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25206 to 21023. [2022-11-23 14:08:00,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21023 states, 21022 states have (on average 1.4676529350204548) internal successors, (30853), 21022 states have internal predecessors, (30853), 0 states have call successors, (0), 0 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 14:08:00,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21023 states to 21023 states and 30853 transitions. [2022-11-23 14:08:00,164 INFO L78 Accepts]: Start accepts. Automaton has 21023 states and 30853 transitions. Word has length 82 [2022-11-23 14:08:00,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:00,165 INFO L495 AbstractCegarLoop]: Abstraction has 21023 states and 30853 transitions. [2022-11-23 14:08:00,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 14:08:00,165 INFO L276 IsEmpty]: Start isEmpty. Operand 21023 states and 30853 transitions. [2022-11-23 14:08:00,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 14:08:00,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:00,167 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] [2022-11-23 14:08:00,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:08:00,167 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:08:00,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:00,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1815293023, now seen corresponding path program 1 times [2022-11-23 14:08:00,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:08:00,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418050436] [2022-11-23 14:08:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:00,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:08:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:01,907 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 14:08:01,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:08:01,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418050436] [2022-11-23 14:08:01,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418050436] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:08:01,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:08:01,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-23 14:08:01,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460715821] [2022-11-23 14:08:01,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:08:01,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 14:08:01,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:08:01,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 14:08:01,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:08:01,909 INFO L87 Difference]: Start difference. First operand 21023 states and 30853 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 14:08:07,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:07,246 INFO L93 Difference]: Finished difference Result 30982 states and 45382 transitions. [2022-11-23 14:08:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 14:08:07,247 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2022-11-23 14:08:07,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:07,292 INFO L225 Difference]: With dead ends: 30982 [2022-11-23 14:08:07,292 INFO L226 Difference]: Without dead ends: 30980 [2022-11-23 14:08:07,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:08:07,301 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 1170 mSDsluCounter, 2638 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 3045 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:07,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1170 Valid, 3045 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 14:08:07,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30980 states. [2022-11-23 14:08:10,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30980 to 21046. [2022-11-23 14:08:10,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21046 states, 21045 states have (on average 1.4673794250415775) internal successors, (30881), 21045 states have internal predecessors, (30881), 0 states have call successors, (0), 0 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 14:08:10,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21046 states to 21046 states and 30881 transitions. [2022-11-23 14:08:10,449 INFO L78 Accepts]: Start accepts. Automaton has 21046 states and 30881 transitions. Word has length 82 [2022-11-23 14:08:10,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:10,449 INFO L495 AbstractCegarLoop]: Abstraction has 21046 states and 30881 transitions. [2022-11-23 14:08:10,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 14:08:10,449 INFO L276 IsEmpty]: Start isEmpty. Operand 21046 states and 30881 transitions. [2022-11-23 14:08:10,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 14:08:10,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:10,451 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] [2022-11-23 14:08:10,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:08:10,452 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:08:10,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:10,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1206852449, now seen corresponding path program 1 times [2022-11-23 14:08:10,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:08:10,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876017489] [2022-11-23 14:08:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:10,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:08:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:12,166 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 14:08:12,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:08:12,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876017489] [2022-11-23 14:08:12,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876017489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:08:12,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:08:12,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-23 14:08:12,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882198392] [2022-11-23 14:08:12,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:08:12,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 14:08:12,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:08:12,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 14:08:12,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:08:12,168 INFO L87 Difference]: Start difference. First operand 21046 states and 30881 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 14:08:19,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:19,337 INFO L93 Difference]: Finished difference Result 37807 states and 55482 transitions. [2022-11-23 14:08:19,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 14:08:19,338 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2022-11-23 14:08:19,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:19,398 INFO L225 Difference]: With dead ends: 37807 [2022-11-23 14:08:19,398 INFO L226 Difference]: Without dead ends: 37805 [2022-11-23 14:08:19,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:08:19,408 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 1170 mSDsluCounter, 3414 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 3821 SdHoareTripleChecker+Invalid, 1614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:19,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1170 Valid, 3821 Invalid, 1614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-23 14:08:19,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37805 states. [2022-11-23 14:08:22,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37805 to 22837. [2022-11-23 14:08:22,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22837 states, 22836 states have (on average 1.4679015589420215) internal successors, (33521), 22836 states have internal predecessors, (33521), 0 states have call successors, (0), 0 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 14:08:23,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22837 states to 22837 states and 33521 transitions. [2022-11-23 14:08:23,024 INFO L78 Accepts]: Start accepts. Automaton has 22837 states and 33521 transitions. Word has length 82 [2022-11-23 14:08:23,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:23,024 INFO L495 AbstractCegarLoop]: Abstraction has 22837 states and 33521 transitions. [2022-11-23 14:08:23,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 14:08:23,025 INFO L276 IsEmpty]: Start isEmpty. Operand 22837 states and 33521 transitions. [2022-11-23 14:08:23,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-23 14:08:23,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:23,027 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] [2022-11-23 14:08:23,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:08:23,027 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:08:23,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:23,027 INFO L85 PathProgramCache]: Analyzing trace with hash -670987149, now seen corresponding path program 1 times [2022-11-23 14:08:23,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:08:23,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677488443] [2022-11-23 14:08:23,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:23,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:08:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:24,828 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 14:08:24,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:08:24,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677488443] [2022-11-23 14:08:24,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677488443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:08:24,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:08:24,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-23 14:08:24,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955075173] [2022-11-23 14:08:24,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:08:24,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 14:08:24,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:08:24,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 14:08:24,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:08:24,830 INFO L87 Difference]: Start difference. First operand 22837 states and 33521 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 14:08:33,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:33,208 INFO L93 Difference]: Finished difference Result 44355 states and 65227 transitions. [2022-11-23 14:08:33,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 14:08:33,209 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2022-11-23 14:08:33,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:33,282 INFO L225 Difference]: With dead ends: 44355 [2022-11-23 14:08:33,282 INFO L226 Difference]: Without dead ends: 44353 [2022-11-23 14:08:33,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:08:33,292 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 1091 mSDsluCounter, 2009 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 2416 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:33,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1091 Valid, 2416 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 14:08:33,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44353 states. [2022-11-23 14:08:37,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44353 to 25441. [2022-11-23 14:08:37,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25441 states, 25440 states have (on average 1.4694182389937107) internal successors, (37382), 25440 states have internal predecessors, (37382), 0 states have call successors, (0), 0 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 14:08:37,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25441 states to 25441 states and 37382 transitions. [2022-11-23 14:08:37,608 INFO L78 Accepts]: Start accepts. Automaton has 25441 states and 37382 transitions. Word has length 83 [2022-11-23 14:08:37,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:37,608 INFO L495 AbstractCegarLoop]: Abstraction has 25441 states and 37382 transitions. [2022-11-23 14:08:37,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 14:08:37,609 INFO L276 IsEmpty]: Start isEmpty. Operand 25441 states and 37382 transitions. [2022-11-23 14:08:37,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-23 14:08:37,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:37,611 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] [2022-11-23 14:08:37,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 14:08:37,611 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:08:37,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:37,612 INFO L85 PathProgramCache]: Analyzing trace with hash 178720109, now seen corresponding path program 1 times [2022-11-23 14:08:37,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:08:37,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916887888] [2022-11-23 14:08:37,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:37,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:08:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:41,147 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 14:08:41,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:08:41,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916887888] [2022-11-23 14:08:41,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916887888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:08:41,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:08:41,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-23 14:08:41,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196704873] [2022-11-23 14:08:41,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:08:41,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 14:08:41,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:08:41,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 14:08:41,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:08:41,150 INFO L87 Difference]: Start difference. First operand 25441 states and 37382 transitions. Second operand has 30 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:08:52,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:52,167 INFO L93 Difference]: Finished difference Result 33859 states and 49605 transitions. [2022-11-23 14:08:52,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-23 14:08:52,167 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-23 14:08:52,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:52,219 INFO L225 Difference]: With dead ends: 33859 [2022-11-23 14:08:52,219 INFO L226 Difference]: Without dead ends: 31649 [2022-11-23 14:08:52,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=508, Invalid=2248, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 14:08:52,231 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 1865 mSDsluCounter, 3408 mSDsCounter, 0 mSdLazyCounter, 5099 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1865 SdHoareTripleChecker+Valid, 3651 SdHoareTripleChecker+Invalid, 5113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 5099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:52,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1865 Valid, 3651 Invalid, 5113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 5099 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-23 14:08:52,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31649 states. [2022-11-23 14:08:56,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31649 to 25461. [2022-11-23 14:08:56,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25461 states, 25460 states have (on average 1.4691673212882954) internal successors, (37405), 25460 states have internal predecessors, (37405), 0 states have call successors, (0), 0 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 14:08:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25461 states to 25461 states and 37405 transitions. [2022-11-23 14:08:56,816 INFO L78 Accepts]: Start accepts. Automaton has 25461 states and 37405 transitions. Word has length 84 [2022-11-23 14:08:56,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:56,816 INFO L495 AbstractCegarLoop]: Abstraction has 25461 states and 37405 transitions. [2022-11-23 14:08:56,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:08:56,817 INFO L276 IsEmpty]: Start isEmpty. Operand 25461 states and 37405 transitions. [2022-11-23 14:08:56,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-23 14:08:56,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:56,819 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] [2022-11-23 14:08:56,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 14:08:56,819 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:08:56,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:56,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1905117811, now seen corresponding path program 1 times [2022-11-23 14:08:56,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:08:56,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407469501] [2022-11-23 14:08:56,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:56,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:08:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:58,588 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 14:08:58,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:08:58,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407469501] [2022-11-23 14:08:58,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407469501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:08:58,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:08:58,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-11-23 14:08:58,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607905289] [2022-11-23 14:08:58,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:08:58,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 14:08:58,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:08:58,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 14:08:58,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:08:58,590 INFO L87 Difference]: Start difference. First operand 25461 states and 37405 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:09:07,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:07,852 INFO L93 Difference]: Finished difference Result 46119 states and 67604 transitions. [2022-11-23 14:09:07,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 14:09:07,853 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-23 14:09:07,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:07,919 INFO L225 Difference]: With dead ends: 46119 [2022-11-23 14:09:07,920 INFO L226 Difference]: Without dead ends: 46117 [2022-11-23 14:09:07,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2022-11-23 14:09:07,928 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 1286 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:07,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1286 Valid, 1684 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:09:07,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46117 states. [2022-11-23 14:09:12,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46117 to 25474. [2022-11-23 14:09:12,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25474 states, 25473 states have (on average 1.46904565618498) internal successors, (37421), 25473 states have internal predecessors, (37421), 0 states have call successors, (0), 0 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 14:09:12,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25474 states to 25474 states and 37421 transitions. [2022-11-23 14:09:12,720 INFO L78 Accepts]: Start accepts. Automaton has 25474 states and 37421 transitions. Word has length 84 [2022-11-23 14:09:12,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:12,720 INFO L495 AbstractCegarLoop]: Abstraction has 25474 states and 37421 transitions. [2022-11-23 14:09:12,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:09:12,720 INFO L276 IsEmpty]: Start isEmpty. Operand 25474 states and 37421 transitions. [2022-11-23 14:09:12,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-23 14:09:12,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:12,725 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] [2022-11-23 14:09:12,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 14:09:12,725 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:09:12,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:12,725 INFO L85 PathProgramCache]: Analyzing trace with hash -762471091, now seen corresponding path program 1 times [2022-11-23 14:09:12,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:12,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187009266] [2022-11-23 14:09:12,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:12,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:14,765 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 14:09:14,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:14,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187009266] [2022-11-23 14:09:14,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187009266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:14,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:14,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-11-23 14:09:14,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355588487] [2022-11-23 14:09:14,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:14,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 14:09:14,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:14,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 14:09:14,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:09:14,767 INFO L87 Difference]: Start difference. First operand 25474 states and 37421 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:09:24,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:24,997 INFO L93 Difference]: Finished difference Result 40731 states and 59656 transitions. [2022-11-23 14:09:24,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 14:09:24,997 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-23 14:09:24,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:25,063 INFO L225 Difference]: With dead ends: 40731 [2022-11-23 14:09:25,064 INFO L226 Difference]: Without dead ends: 40729 [2022-11-23 14:09:25,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2022-11-23 14:09:25,073 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 1035 mSDsluCounter, 3689 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 4103 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:25,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1035 Valid, 4103 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 14:09:25,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40729 states. [2022-11-23 14:09:30,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40729 to 25474. [2022-11-23 14:09:30,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25474 states, 25473 states have (on average 1.46904565618498) internal successors, (37421), 25473 states have internal predecessors, (37421), 0 states have call successors, (0), 0 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 14:09:30,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25474 states to 25474 states and 37421 transitions. [2022-11-23 14:09:30,076 INFO L78 Accepts]: Start accepts. Automaton has 25474 states and 37421 transitions. Word has length 84 [2022-11-23 14:09:30,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:30,077 INFO L495 AbstractCegarLoop]: Abstraction has 25474 states and 37421 transitions. [2022-11-23 14:09:30,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:09:30,077 INFO L276 IsEmpty]: Start isEmpty. Operand 25474 states and 37421 transitions. [2022-11-23 14:09:30,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-23 14:09:30,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:30,078 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] [2022-11-23 14:09:30,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 14:09:30,079 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:09:30,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:30,079 INFO L85 PathProgramCache]: Analyzing trace with hash -75870771, now seen corresponding path program 1 times [2022-11-23 14:09:30,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:30,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450557280] [2022-11-23 14:09:30,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:30,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:32,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:32,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450557280] [2022-11-23 14:09:32,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450557280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:32,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:32,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-11-23 14:09:32,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122023157] [2022-11-23 14:09:32,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:32,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 14:09:32,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:32,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 14:09:32,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:09:32,248 INFO L87 Difference]: Start difference. First operand 25474 states and 37421 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:09:39,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:39,851 INFO L93 Difference]: Finished difference Result 31915 states and 46698 transitions. [2022-11-23 14:09:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 14:09:39,851 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-23 14:09:39,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:39,896 INFO L225 Difference]: With dead ends: 31915 [2022-11-23 14:09:39,896 INFO L226 Difference]: Without dead ends: 31913 [2022-11-23 14:09:39,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 14:09:39,902 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 1170 mSDsluCounter, 2456 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 2934 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:39,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1170 Valid, 2934 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:09:39,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31913 states. [2022-11-23 14:09:46,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31913 to 26598. [2022-11-23 14:09:46,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26598 states, 26597 states have (on average 1.4673083430462082) internal successors, (39026), 26597 states have internal predecessors, (39026), 0 states have call successors, (0), 0 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 14:09:46,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26598 states to 26598 states and 39026 transitions. [2022-11-23 14:09:46,728 INFO L78 Accepts]: Start accepts. Automaton has 26598 states and 39026 transitions. Word has length 84 [2022-11-23 14:09:46,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:46,728 INFO L495 AbstractCegarLoop]: Abstraction has 26598 states and 39026 transitions. [2022-11-23 14:09:46,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:09:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 26598 states and 39026 transitions. [2022-11-23 14:09:46,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-23 14:09:46,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:46,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:09:46,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 14:09:46,731 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:09:46,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:46,731 INFO L85 PathProgramCache]: Analyzing trace with hash -533643891, now seen corresponding path program 1 times [2022-11-23 14:09:46,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:46,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99675549] [2022-11-23 14:09:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:46,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:49,234 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 14:09:49,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:49,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99675549] [2022-11-23 14:09:49,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99675549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:49,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:49,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-23 14:09:49,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302223819] [2022-11-23 14:09:49,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:49,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 14:09:49,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:49,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 14:09:49,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-11-23 14:09:49,236 INFO L87 Difference]: Start difference. First operand 26598 states and 39026 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:09:59,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:59,800 INFO L93 Difference]: Finished difference Result 33161 states and 48548 transitions. [2022-11-23 14:09:59,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 14:09:59,801 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-23 14:09:59,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:59,846 INFO L225 Difference]: With dead ends: 33161 [2022-11-23 14:09:59,846 INFO L226 Difference]: Without dead ends: 30919 [2022-11-23 14:09:59,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=357, Invalid=1535, Unknown=0, NotChecked=0, Total=1892 [2022-11-23 14:09:59,854 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 1653 mSDsluCounter, 2439 mSDsCounter, 0 mSdLazyCounter, 3304 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1653 SdHoareTripleChecker+Valid, 2697 SdHoareTripleChecker+Invalid, 3320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 3304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:59,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1653 Valid, 2697 Invalid, 3320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 3304 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-23 14:09:59,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30919 states. [2022-11-23 14:10:05,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30919 to 26610. [2022-11-23 14:10:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26610 states, 26609 states have (on average 1.4671727610958698) internal successors, (39040), 26609 states have internal predecessors, (39040), 0 states have call successors, (0), 0 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 14:10:05,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26610 states to 26610 states and 39040 transitions. [2022-11-23 14:10:05,987 INFO L78 Accepts]: Start accepts. Automaton has 26610 states and 39040 transitions. Word has length 84 [2022-11-23 14:10:05,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:05,987 INFO L495 AbstractCegarLoop]: Abstraction has 26610 states and 39040 transitions. [2022-11-23 14:10:05,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:10:05,987 INFO L276 IsEmpty]: Start isEmpty. Operand 26610 states and 39040 transitions. [2022-11-23 14:10:05,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-23 14:10:05,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:05,989 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] [2022-11-23 14:10:05,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 14:10:05,990 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:10:05,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:05,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1677485485, now seen corresponding path program 1 times [2022-11-23 14:10:05,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:05,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163434489] [2022-11-23 14:10:05,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:05,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:07,623 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 14:10:07,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:07,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163434489] [2022-11-23 14:10:07,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163434489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:07,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:10:07,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-11-23 14:10:07,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863890430] [2022-11-23 14:10:07,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:07,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 14:10:07,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:07,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 14:10:07,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:10:07,626 INFO L87 Difference]: Start difference. First operand 26610 states and 39040 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:10:20,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:20,072 INFO L93 Difference]: Finished difference Result 43008 states and 62895 transitions. [2022-11-23 14:10:20,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 14:10:20,072 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-23 14:10:20,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:20,132 INFO L225 Difference]: With dead ends: 43008 [2022-11-23 14:10:20,132 INFO L226 Difference]: Without dead ends: 43006 [2022-11-23 14:10:20,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2022-11-23 14:10:20,140 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 1207 mSDsluCounter, 3103 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 3510 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:20,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1207 Valid, 3510 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:10:20,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43006 states. [2022-11-23 14:10:26,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43006 to 26621. [2022-11-23 14:10:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26621 states, 26620 states have (on average 1.4670924117205109) internal successors, (39054), 26620 states have internal predecessors, (39054), 0 states have call successors, (0), 0 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 14:10:26,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26621 states to 26621 states and 39054 transitions. [2022-11-23 14:10:26,310 INFO L78 Accepts]: Start accepts. Automaton has 26621 states and 39054 transitions. Word has length 84 [2022-11-23 14:10:26,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:26,310 INFO L495 AbstractCegarLoop]: Abstraction has 26621 states and 39054 transitions. [2022-11-23 14:10:26,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:10:26,310 INFO L276 IsEmpty]: Start isEmpty. Operand 26621 states and 39054 transitions. [2022-11-23 14:10:26,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-23 14:10:26,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:26,312 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] [2022-11-23 14:10:26,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 14:10:26,312 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:10:26,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:26,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1076849933, now seen corresponding path program 1 times [2022-11-23 14:10:26,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:26,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98832649] [2022-11-23 14:10:26,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:26,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:28,816 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 14:10:28,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:28,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98832649] [2022-11-23 14:10:28,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98832649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:28,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:10:28,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-23 14:10:28,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193324250] [2022-11-23 14:10:28,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:28,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 14:10:28,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:28,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 14:10:28,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-11-23 14:10:28,819 INFO L87 Difference]: Start difference. First operand 26621 states and 39054 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:10:43,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:43,372 INFO L93 Difference]: Finished difference Result 40191 states and 58890 transitions. [2022-11-23 14:10:43,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 14:10:43,373 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-23 14:10:43,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:43,441 INFO L225 Difference]: With dead ends: 40191 [2022-11-23 14:10:43,441 INFO L226 Difference]: Without dead ends: 40189 [2022-11-23 14:10:43,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=334, Invalid=1472, Unknown=0, NotChecked=0, Total=1806 [2022-11-23 14:10:43,452 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 1925 mSDsluCounter, 3258 mSDsCounter, 0 mSdLazyCounter, 4282 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1925 SdHoareTripleChecker+Valid, 3548 SdHoareTripleChecker+Invalid, 4294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 4282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:43,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1925 Valid, 3548 Invalid, 4294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 4282 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-23 14:10:43,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40189 states. [2022-11-23 14:10:50,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40189 to 26636. [2022-11-23 14:10:50,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26636 states, 26635 states have (on average 1.4670546273700018) internal successors, (39075), 26635 states have internal predecessors, (39075), 0 states have call successors, (0), 0 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 14:10:50,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26636 states to 26636 states and 39075 transitions. [2022-11-23 14:10:50,758 INFO L78 Accepts]: Start accepts. Automaton has 26636 states and 39075 transitions. Word has length 84 [2022-11-23 14:10:50,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:50,758 INFO L495 AbstractCegarLoop]: Abstraction has 26636 states and 39075 transitions. [2022-11-23 14:10:50,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:10:50,759 INFO L276 IsEmpty]: Start isEmpty. Operand 26636 states and 39075 transitions. [2022-11-23 14:10:50,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-23 14:10:50,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:50,761 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] [2022-11-23 14:10:50,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-23 14:10:50,761 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:10:50,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:50,762 INFO L85 PathProgramCache]: Analyzing trace with hash 350262605, now seen corresponding path program 1 times [2022-11-23 14:10:50,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:50,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751241155] [2022-11-23 14:10:50,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:50,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:53,247 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 14:10:53,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:53,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751241155] [2022-11-23 14:10:53,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751241155] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:53,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:10:53,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-23 14:10:53,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934223719] [2022-11-23 14:10:53,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:53,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 14:10:53,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:53,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 14:10:53,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-11-23 14:10:53,250 INFO L87 Difference]: Start difference. First operand 26636 states and 39075 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:11:10,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:10,405 INFO L93 Difference]: Finished difference Result 53064 states and 77780 transitions. [2022-11-23 14:11:10,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 14:11:10,406 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-23 14:11:10,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:10,485 INFO L225 Difference]: With dead ends: 53064 [2022-11-23 14:11:10,485 INFO L226 Difference]: Without dead ends: 48582 [2022-11-23 14:11:10,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=334, Invalid=1472, Unknown=0, NotChecked=0, Total=1806 [2022-11-23 14:11:10,499 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 1687 mSDsluCounter, 2499 mSDsCounter, 0 mSdLazyCounter, 3225 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1687 SdHoareTripleChecker+Valid, 2763 SdHoareTripleChecker+Invalid, 3246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 3225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:10,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1687 Valid, 2763 Invalid, 3246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 3225 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-23 14:11:10,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48582 states. [2022-11-23 14:11:19,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48582 to 32301. [2022-11-23 14:11:19,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32301 states, 32300 states have (on average 1.4646130030959752) internal successors, (47307), 32300 states have internal predecessors, (47307), 0 states have call successors, (0), 0 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 14:11:19,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32301 states to 32301 states and 47307 transitions. [2022-11-23 14:11:19,599 INFO L78 Accepts]: Start accepts. Automaton has 32301 states and 47307 transitions. Word has length 84 [2022-11-23 14:11:19,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:19,599 INFO L495 AbstractCegarLoop]: Abstraction has 32301 states and 47307 transitions. [2022-11-23 14:11:19,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:11:19,599 INFO L276 IsEmpty]: Start isEmpty. Operand 32301 states and 47307 transitions. [2022-11-23 14:11:19,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-23 14:11:19,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:19,601 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] [2022-11-23 14:11:19,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-23 14:11:19,602 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:19,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:19,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1733575315, now seen corresponding path program 1 times [2022-11-23 14:11:19,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:19,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28356256] [2022-11-23 14:11:19,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:19,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:21,153 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 14:11:21,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:21,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28356256] [2022-11-23 14:11:21,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28356256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:21,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:11:21,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-11-23 14:11:21,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684595831] [2022-11-23 14:11:21,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:21,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 14:11:21,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:21,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 14:11:21,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:11:21,155 INFO L87 Difference]: Start difference. First operand 32301 states and 47307 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:11:38,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:38,336 INFO L93 Difference]: Finished difference Result 58236 states and 85138 transitions. [2022-11-23 14:11:38,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 14:11:38,339 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-23 14:11:38,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:38,435 INFO L225 Difference]: With dead ends: 58236 [2022-11-23 14:11:38,435 INFO L226 Difference]: Without dead ends: 58234 [2022-11-23 14:11:38,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2022-11-23 14:11:38,447 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 1373 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 1843 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:38,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1373 Valid, 1843 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:11:38,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58234 states. [2022-11-23 14:11:48,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58234 to 32323. [2022-11-23 14:11:48,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32323 states, 32322 states have (on average 1.464420518532269) internal successors, (47333), 32322 states have internal predecessors, (47333), 0 states have call successors, (0), 0 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 14:11:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32323 states to 32323 states and 47333 transitions. [2022-11-23 14:11:48,516 INFO L78 Accepts]: Start accepts. Automaton has 32323 states and 47333 transitions. Word has length 84 [2022-11-23 14:11:48,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:48,516 INFO L495 AbstractCegarLoop]: Abstraction has 32323 states and 47333 transitions. [2022-11-23 14:11:48,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:11:48,516 INFO L276 IsEmpty]: Start isEmpty. Operand 32323 states and 47333 transitions. [2022-11-23 14:11:48,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-23 14:11:48,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:48,517 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] [2022-11-23 14:11:48,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-23 14:11:48,518 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:48,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:48,518 INFO L85 PathProgramCache]: Analyzing trace with hash -590928595, now seen corresponding path program 1 times [2022-11-23 14:11:48,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:48,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65935207] [2022-11-23 14:11:48,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:48,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:11:50,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:50,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65935207] [2022-11-23 14:11:50,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65935207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:50,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:11:50,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-23 14:11:50,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578306471] [2022-11-23 14:11:50,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:50,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 14:11:50,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:50,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 14:11:50,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-11-23 14:11:50,562 INFO L87 Difference]: Start difference. First operand 32323 states and 47333 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:12:11,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:11,830 INFO L93 Difference]: Finished difference Result 56077 states and 82019 transitions. [2022-11-23 14:12:11,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 14:12:11,831 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-23 14:12:11,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:11,928 INFO L225 Difference]: With dead ends: 56077 [2022-11-23 14:12:11,929 INFO L226 Difference]: Without dead ends: 56075 [2022-11-23 14:12:11,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2022-11-23 14:12:11,940 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 1875 mSDsluCounter, 3212 mSDsCounter, 0 mSdLazyCounter, 4391 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1875 SdHoareTripleChecker+Valid, 3484 SdHoareTripleChecker+Invalid, 4413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:11,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1875 Valid, 3484 Invalid, 4413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4391 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-23 14:12:11,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56075 states. [2022-11-23 14:12:22,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56075 to 32334. [2022-11-23 14:12:22,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32334 states, 32333 states have (on average 1.4643862307858844) internal successors, (47348), 32333 states have internal predecessors, (47348), 0 states have call successors, (0), 0 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 14:12:22,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32334 states to 32334 states and 47348 transitions. [2022-11-23 14:12:22,945 INFO L78 Accepts]: Start accepts. Automaton has 32334 states and 47348 transitions. Word has length 84 [2022-11-23 14:12:22,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:22,946 INFO L495 AbstractCegarLoop]: Abstraction has 32334 states and 47348 transitions. [2022-11-23 14:12:22,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 14:12:22,946 INFO L276 IsEmpty]: Start isEmpty. Operand 32334 states and 47348 transitions. [2022-11-23 14:12:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-23 14:12:22,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:22,947 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] [2022-11-23 14:12:22,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-23 14:12:22,947 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:22,948 INFO L85 PathProgramCache]: Analyzing trace with hash 359260575, now seen corresponding path program 1 times [2022-11-23 14:12:22,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:22,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849700570] [2022-11-23 14:12:22,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:22,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:25,234 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 14:12:25,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:25,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849700570] [2022-11-23 14:12:25,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849700570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:25,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:12:25,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-23 14:12:25,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643808999] [2022-11-23 14:12:25,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:25,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 14:12:25,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:25,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 14:12:25,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-11-23 14:12:25,236 INFO L87 Difference]: Start difference. First operand 32334 states and 47348 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 14:12:47,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:47,923 INFO L93 Difference]: Finished difference Result 62844 states and 92189 transitions. [2022-11-23 14:12:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 14:12:47,924 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2022-11-23 14:12:47,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:48,040 INFO L225 Difference]: With dead ends: 62844 [2022-11-23 14:12:48,040 INFO L226 Difference]: Without dead ends: 62842 [2022-11-23 14:12:48,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=332, Invalid=1474, Unknown=0, NotChecked=0, Total=1806 [2022-11-23 14:12:48,054 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1688 mSDsluCounter, 3163 mSDsCounter, 0 mSdLazyCounter, 3953 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1688 SdHoareTripleChecker+Valid, 3446 SdHoareTripleChecker+Invalid, 3971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:48,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1688 Valid, 3446 Invalid, 3971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3953 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-23 14:12:48,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62842 states. [2022-11-23 14:13:00,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62842 to 32337. [2022-11-23 14:13:00,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32337 states, 32336 states have (on average 1.4643431469569521) internal successors, (47351), 32336 states have internal predecessors, (47351), 0 states have call successors, (0), 0 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 14:13:00,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32337 states to 32337 states and 47351 transitions. [2022-11-23 14:13:00,343 INFO L78 Accepts]: Start accepts. Automaton has 32337 states and 47351 transitions. Word has length 85 [2022-11-23 14:13:00,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:00,343 INFO L495 AbstractCegarLoop]: Abstraction has 32337 states and 47351 transitions. [2022-11-23 14:13:00,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 14:13:00,344 INFO L276 IsEmpty]: Start isEmpty. Operand 32337 states and 47351 transitions. [2022-11-23 14:13:00,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-23 14:13:00,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:00,346 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] [2022-11-23 14:13:00,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-23 14:13:00,346 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:13:00,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:00,347 INFO L85 PathProgramCache]: Analyzing trace with hash -367326753, now seen corresponding path program 1 times [2022-11-23 14:13:00,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:13:00,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942305455] [2022-11-23 14:13:00,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:00,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:13:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:03,081 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 14:13:03,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:13:03,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942305455] [2022-11-23 14:13:03,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942305455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:13:03,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:13:03,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-23 14:13:03,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279744203] [2022-11-23 14:13:03,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:13:03,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 14:13:03,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:13:03,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 14:13:03,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:13:03,084 INFO L87 Difference]: Start difference. First operand 32337 states and 47351 transitions. Second operand has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 29 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 14:13:21,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:21,524 INFO L93 Difference]: Finished difference Result 40744 states and 59564 transitions. [2022-11-23 14:13:21,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-23 14:13:21,524 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 29 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2022-11-23 14:13:21,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:21,573 INFO L225 Difference]: With dead ends: 40744 [2022-11-23 14:13:21,573 INFO L226 Difference]: Without dead ends: 38534 [2022-11-23 14:13:21,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=483, Invalid=2169, Unknown=0, NotChecked=0, Total=2652 [2022-11-23 14:13:21,582 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 1677 mSDsluCounter, 3802 mSDsCounter, 0 mSdLazyCounter, 5515 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1677 SdHoareTripleChecker+Valid, 4076 SdHoareTripleChecker+Invalid, 5524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 5515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:21,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1677 Valid, 4076 Invalid, 5524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 5515 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-23 14:13:21,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38534 states. [2022-11-23 14:13:32,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38534 to 32344. [2022-11-23 14:13:32,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32344 states, 32343 states have (on average 1.4643354048789536) internal successors, (47361), 32343 states have internal predecessors, (47361), 0 states have call successors, (0), 0 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 14:13:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32344 states to 32344 states and 47361 transitions. [2022-11-23 14:13:32,468 INFO L78 Accepts]: Start accepts. Automaton has 32344 states and 47361 transitions. Word has length 85 [2022-11-23 14:13:32,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:32,468 INFO L495 AbstractCegarLoop]: Abstraction has 32344 states and 47361 transitions. [2022-11-23 14:13:32,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 29 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 14:13:32,468 INFO L276 IsEmpty]: Start isEmpty. Operand 32344 states and 47361 transitions. [2022-11-23 14:13:32,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-23 14:13:32,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:32,469 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] [2022-11-23 14:13:32,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-23 14:13:32,470 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:13:32,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:32,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1843802623, now seen corresponding path program 1 times [2022-11-23 14:13:32,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:13:32,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187275212] [2022-11-23 14:13:32,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:32,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:13:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:33,783 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 14:13:33,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:13:33,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187275212] [2022-11-23 14:13:33,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187275212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:13:33,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:13:33,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-11-23 14:13:33,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262426806] [2022-11-23 14:13:33,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:13:33,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 14:13:33,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:13:33,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 14:13:33,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:13:33,785 INFO L87 Difference]: Start difference. First operand 32344 states and 47361 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 14:13:54,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:54,861 INFO L93 Difference]: Finished difference Result 65375 states and 95957 transitions. [2022-11-23 14:13:54,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 14:13:54,862 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2022-11-23 14:13:54,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:54,959 INFO L225 Difference]: With dead ends: 65375 [2022-11-23 14:13:54,959 INFO L226 Difference]: Without dead ends: 65373 [2022-11-23 14:13:54,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2022-11-23 14:13:54,970 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 1223 mSDsluCounter, 2248 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 2686 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:54,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1223 Valid, 2686 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1525 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 14:13:55,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65373 states.