./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_7dbb4e9d-1911-4ead-8c01-bec22ddc7210/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbb4e9d-1911-4ead-8c01-bec22ddc7210/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbb4e9d-1911-4ead-8c01-bec22ddc7210/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbb4e9d-1911-4ead-8c01-bec22ddc7210/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbb4e9d-1911-4ead-8c01-bec22ddc7210/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbb4e9d-1911-4ead-8c01-bec22ddc7210/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c1928fd99ddae1c837272e074c24407d4011054550d928a14afc6eb7550c755f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 22:18:32,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:18:32,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:18:32,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:18:32,574 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:18:32,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:18:32,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:18:32,584 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:18:32,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:18:32,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:18:32,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:18:32,593 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:18:32,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:18:32,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:18:32,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:18:32,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:18:32,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:18:32,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:18:32,614 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:18:32,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:18:32,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:18:32,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:18:32,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:18:32,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:18:32,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:18:32,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:18:32,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:18:32,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:18:32,641 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:18:32,642 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:18:32,644 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:18:32,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:18:32,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:18:32,649 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:18:32,650 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:18:32,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:18:32,652 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:18:32,652 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:18:32,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:18:32,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:18:32,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:18:32,655 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbb4e9d-1911-4ead-8c01-bec22ddc7210/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:18:32,707 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:18:32,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:18:32,708 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:18:32,709 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:18:32,710 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:18:32,710 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:18:32,710 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:18:32,711 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:18:32,711 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:18:32,711 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:18:32,712 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:18:32,713 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:18:32,713 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:18:32,713 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:18:32,713 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:18:32,714 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:18:32,714 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:18:32,714 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:18:32,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:18:32,715 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:18:32,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:18:32,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:18:32,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:18:32,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:18:32,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:18:32,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:18:32,718 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:18:32,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:18:32,718 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:18:32,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:18:32,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:18:32,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:18:32,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:18:32,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:18:32,720 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:18:32,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:18:32,720 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:18:32,721 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:18:32,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:18:32,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:18:32,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:18:32,722 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_7dbb4e9d-1911-4ead-8c01-bec22ddc7210/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbb4e9d-1911-4ead-8c01-bec22ddc7210/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1928fd99ddae1c837272e074c24407d4011054550d928a14afc6eb7550c755f [2022-11-25 22:18:32,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:18:33,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:18:33,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:18:33,029 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:18:33,030 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:18:33,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbb4e9d-1911-4ead-8c01-bec22ddc7210/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2022-11-25 22:18:36,187 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:18:36,507 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:18:36,507 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbb4e9d-1911-4ead-8c01-bec22ddc7210/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2022-11-25 22:18:36,523 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbb4e9d-1911-4ead-8c01-bec22ddc7210/bin/utaipan-ByfvJB40ur/data/f9fc729b7/465e0f6f91f54015bc33db49729740e8/FLAGa0f297950 [2022-11-25 22:18:36,555 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbb4e9d-1911-4ead-8c01-bec22ddc7210/bin/utaipan-ByfvJB40ur/data/f9fc729b7/465e0f6f91f54015bc33db49729740e8 [2022-11-25 22:18:36,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:18:36,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:18:36,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:18:36,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:18:36,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:18:36,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:18:36" (1/1) ... [2022-11-25 22:18:36,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6abc4581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:36, skipping insertion in model container [2022-11-25 22:18:36,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:18:36" (1/1) ... [2022-11-25 22:18:36,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:18:36,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:18:37,236 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_7dbb4e9d-1911-4ead-8c01-bec22ddc7210/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[24251,24264] [2022-11-25 22:18:37,292 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_7dbb4e9d-1911-4ead-8c01-bec22ddc7210/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[28044,28057] [2022-11-25 22:18:37,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:18:37,473 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:18:37,700 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_7dbb4e9d-1911-4ead-8c01-bec22ddc7210/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[24251,24264] [2022-11-25 22:18:37,743 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_7dbb4e9d-1911-4ead-8c01-bec22ddc7210/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[28044,28057] [2022-11-25 22:18:37,932 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:18:37,958 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:18:37,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:37 WrapperNode [2022-11-25 22:18:37,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:18:37,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:18:37,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:18:37,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:18:37,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:37" (1/1) ... [2022-11-25 22:18:38,009 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:37" (1/1) ... [2022-11-25 22:18:38,110 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2364 [2022-11-25 22:18:38,114 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:18:38,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:18:38,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:18:38,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:18:38,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:37" (1/1) ... [2022-11-25 22:18:38,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:37" (1/1) ... [2022-11-25 22:18:38,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:37" (1/1) ... [2022-11-25 22:18:38,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:37" (1/1) ... [2022-11-25 22:18:38,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:37" (1/1) ... [2022-11-25 22:18:38,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:37" (1/1) ... [2022-11-25 22:18:38,217 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:37" (1/1) ... [2022-11-25 22:18:38,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:37" (1/1) ... [2022-11-25 22:18:38,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:18:38,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:18:38,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:18:38,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:18:38,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:37" (1/1) ... [2022-11-25 22:18:38,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:18:38,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbb4e9d-1911-4ead-8c01-bec22ddc7210/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:18:38,269 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbb4e9d-1911-4ead-8c01-bec22ddc7210/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:18:38,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbb4e9d-1911-4ead-8c01-bec22ddc7210/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:18:38,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:18:38,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:18:38,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:18:38,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:18:38,585 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:18:38,588 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:18:40,296 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:18:40,960 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:18:40,961 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 22:18:40,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:18:40 BoogieIcfgContainer [2022-11-25 22:18:40,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:18:40,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:18:40,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:18:40,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:18:40,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:18:36" (1/3) ... [2022-11-25 22:18:40,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b19b038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:18:40, skipping insertion in model container [2022-11-25 22:18:40,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:37" (2/3) ... [2022-11-25 22:18:40,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b19b038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:18:40, skipping insertion in model container [2022-11-25 22:18:40,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:18:40" (3/3) ... [2022-11-25 22:18:40,973 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2022-11-25 22:18:40,993 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:18:40,994 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 22:18:41,053 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:18:41,059 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;@e3d53ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:18:41,060 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 22:18:41,067 INFO L276 IsEmpty]: Start isEmpty. Operand has 484 states, 481 states have (on average 1.7130977130977132) internal successors, (824), 483 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:41,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-11-25 22:18:41,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:41,088 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:18:41,089 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:41,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:41,094 INFO L85 PathProgramCache]: Analyzing trace with hash -552869798, now seen corresponding path program 1 times [2022-11-25 22:18:41,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:41,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407370780] [2022-11-25 22:18:41,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:41,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:18:42,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:42,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407370780] [2022-11-25 22:18:42,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407370780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:18:42,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:18:42,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:18:42,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41672137] [2022-11-25 22:18:42,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:18:42,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:18:42,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:42,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:18:42,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:18:42,920 INFO L87 Difference]: Start difference. First operand has 484 states, 481 states have (on average 1.7130977130977132) internal successors, (824), 483 states have internal predecessors, (824), 0 states have call successors, (0), 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 4 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:43,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:43,562 INFO L93 Difference]: Finished difference Result 1424 states and 2427 transitions. [2022-11-25 22:18:43,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:18:43,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 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 206 [2022-11-25 22:18:43,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:43,585 INFO L225 Difference]: With dead ends: 1424 [2022-11-25 22:18:43,585 INFO L226 Difference]: Without dead ends: 945 [2022-11-25 22:18:43,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:18:43,596 INFO L413 NwaCegarLoop]: 1256 mSDtfsCounter, 1800 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1800 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:43,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1800 Valid, 1994 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:18:43,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-11-25 22:18:43,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 927. [2022-11-25 22:18:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 925 states have (on average 1.412972972972973) internal successors, (1307), 926 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:43,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1307 transitions. [2022-11-25 22:18:43,760 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1307 transitions. Word has length 206 [2022-11-25 22:18:43,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:43,761 INFO L495 AbstractCegarLoop]: Abstraction has 927 states and 1307 transitions. [2022-11-25 22:18:43,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:43,762 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1307 transitions. [2022-11-25 22:18:43,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-25 22:18:43,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:43,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:18:43,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:18:43,780 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:43,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:43,781 INFO L85 PathProgramCache]: Analyzing trace with hash 2079301526, now seen corresponding path program 1 times [2022-11-25 22:18:43,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:43,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624687070] [2022-11-25 22:18:43,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:43,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:18:44,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:44,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624687070] [2022-11-25 22:18:44,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624687070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:18:44,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:18:44,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:18:44,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853595590] [2022-11-25 22:18:44,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:18:44,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:18:44,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:44,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:18:44,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:18:44,041 INFO L87 Difference]: Start difference. First operand 927 states and 1307 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:44,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:44,442 INFO L93 Difference]: Finished difference Result 2628 states and 3683 transitions. [2022-11-25 22:18:44,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:18:44,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 208 [2022-11-25 22:18:44,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:44,451 INFO L225 Difference]: With dead ends: 2628 [2022-11-25 22:18:44,451 INFO L226 Difference]: Without dead ends: 1822 [2022-11-25 22:18:44,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:18:44,458 INFO L413 NwaCegarLoop]: 1186 mSDtfsCounter, 560 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1798 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:44,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 1798 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:18:44,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2022-11-25 22:18:44,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1804. [2022-11-25 22:18:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1802 states have (on average 1.4106548279689235) internal successors, (2542), 1803 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:44,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 2542 transitions. [2022-11-25 22:18:44,603 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 2542 transitions. Word has length 208 [2022-11-25 22:18:44,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:44,606 INFO L495 AbstractCegarLoop]: Abstraction has 1804 states and 2542 transitions. [2022-11-25 22:18:44,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:44,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 2542 transitions. [2022-11-25 22:18:44,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-25 22:18:44,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:44,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:18:44,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:18:44,621 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:44,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:44,623 INFO L85 PathProgramCache]: Analyzing trace with hash 198546634, now seen corresponding path program 1 times [2022-11-25 22:18:44,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:44,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990486465] [2022-11-25 22:18:44,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:44,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:18:44,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:44,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990486465] [2022-11-25 22:18:44,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990486465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:18:44,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:18:44,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:18:44,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49407207] [2022-11-25 22:18:44,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:18:44,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:18:44,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:44,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:18:44,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:18:44,823 INFO L87 Difference]: Start difference. First operand 1804 states and 2542 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:45,331 INFO L93 Difference]: Finished difference Result 5260 states and 7393 transitions. [2022-11-25 22:18:45,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:18:45,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 208 [2022-11-25 22:18:45,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:45,345 INFO L225 Difference]: With dead ends: 5260 [2022-11-25 22:18:45,345 INFO L226 Difference]: Without dead ends: 3588 [2022-11-25 22:18:45,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:18:45,350 INFO L413 NwaCegarLoop]: 1268 mSDtfsCounter, 670 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 1900 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:45,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 1900 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:18:45,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3588 states. [2022-11-25 22:18:45,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3588 to 1807. [2022-11-25 22:18:45,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1805 states have (on average 1.4099722991689752) internal successors, (2545), 1806 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:45,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2545 transitions. [2022-11-25 22:18:45,616 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2545 transitions. Word has length 208 [2022-11-25 22:18:45,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:45,617 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 2545 transitions. [2022-11-25 22:18:45,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:45,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2545 transitions. [2022-11-25 22:18:45,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-25 22:18:45,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:45,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:18:45,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 22:18:45,623 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:45,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:45,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1032074421, now seen corresponding path program 1 times [2022-11-25 22:18:45,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:45,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358056264] [2022-11-25 22:18:45,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:45,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:18:46,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:46,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358056264] [2022-11-25 22:18:46,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358056264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:18:46,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:18:46,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:18:46,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657698754] [2022-11-25 22:18:46,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:18:46,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:18:46,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:46,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:18:46,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:18:46,457 INFO L87 Difference]: Start difference. First operand 1807 states and 2545 transitions. Second operand has 5 states, 5 states have (on average 41.8) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:47,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:47,140 INFO L93 Difference]: Finished difference Result 5219 states and 7330 transitions. [2022-11-25 22:18:47,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:18:47,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.8) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 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 209 [2022-11-25 22:18:47,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:47,155 INFO L225 Difference]: With dead ends: 5219 [2022-11-25 22:18:47,155 INFO L226 Difference]: Without dead ends: 3427 [2022-11-25 22:18:47,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:18:47,169 INFO L413 NwaCegarLoop]: 1017 mSDtfsCounter, 2127 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2127 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:47,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2127 Valid, 1619 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:18:47,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2022-11-25 22:18:47,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3409. [2022-11-25 22:18:47,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3409 states, 3407 states have (on average 1.397123569122395) internal successors, (4760), 3408 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:47,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3409 states to 3409 states and 4760 transitions. [2022-11-25 22:18:47,625 INFO L78 Accepts]: Start accepts. Automaton has 3409 states and 4760 transitions. Word has length 209 [2022-11-25 22:18:47,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:47,627 INFO L495 AbstractCegarLoop]: Abstraction has 3409 states and 4760 transitions. [2022-11-25 22:18:47,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.8) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:47,627 INFO L276 IsEmpty]: Start isEmpty. Operand 3409 states and 4760 transitions. [2022-11-25 22:18:47,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-11-25 22:18:47,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:47,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:18:47,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:18:47,636 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:47,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:47,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1702713206, now seen corresponding path program 1 times [2022-11-25 22:18:47,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:47,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017918333] [2022-11-25 22:18:47,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:47,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:18:48,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:48,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017918333] [2022-11-25 22:18:48,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017918333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:18:48,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:18:48,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:18:48,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734632776] [2022-11-25 22:18:48,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:18:48,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:18:48,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:48,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:18:48,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:18:48,370 INFO L87 Difference]: Start difference. First operand 3409 states and 4760 transitions. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:49,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:49,631 INFO L93 Difference]: Finished difference Result 9935 states and 13843 transitions. [2022-11-25 22:18:49,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:18:49,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 210 [2022-11-25 22:18:49,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:49,657 INFO L225 Difference]: With dead ends: 9935 [2022-11-25 22:18:49,658 INFO L226 Difference]: Without dead ends: 6664 [2022-11-25 22:18:49,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:18:49,669 INFO L413 NwaCegarLoop]: 1010 mSDtfsCounter, 1457 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:49,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1457 Valid, 1616 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:18:49,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6664 states. [2022-11-25 22:18:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6664 to 6646. [2022-11-25 22:18:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6646 states, 6644 states have (on average 1.388621312462372) internal successors, (9226), 6645 states have internal predecessors, (9226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:50,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6646 states to 6646 states and 9226 transitions. [2022-11-25 22:18:50,465 INFO L78 Accepts]: Start accepts. Automaton has 6646 states and 9226 transitions. Word has length 210 [2022-11-25 22:18:50,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:50,467 INFO L495 AbstractCegarLoop]: Abstraction has 6646 states and 9226 transitions. [2022-11-25 22:18:50,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:50,468 INFO L276 IsEmpty]: Start isEmpty. Operand 6646 states and 9226 transitions. [2022-11-25 22:18:50,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-11-25 22:18:50,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:50,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:18:50,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 22:18:50,502 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:50,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:50,502 INFO L85 PathProgramCache]: Analyzing trace with hash -962154295, now seen corresponding path program 1 times [2022-11-25 22:18:50,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:50,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019486527] [2022-11-25 22:18:50,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:50,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:18:51,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:51,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019486527] [2022-11-25 22:18:51,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019486527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:18:51,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:18:51,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:18:51,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485377008] [2022-11-25 22:18:51,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:18:51,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:18:51,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:51,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:18:51,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:18:51,123 INFO L87 Difference]: Start difference. First operand 6646 states and 9226 transitions. Second operand has 4 states, 4 states have (on average 53.0) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:53,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:53,120 INFO L93 Difference]: Finished difference Result 19462 states and 26965 transitions. [2022-11-25 22:18:53,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:18:53,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 212 [2022-11-25 22:18:53,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:53,182 INFO L225 Difference]: With dead ends: 19462 [2022-11-25 22:18:53,183 INFO L226 Difference]: Without dead ends: 12958 [2022-11-25 22:18:53,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:18:53,193 INFO L413 NwaCegarLoop]: 995 mSDtfsCounter, 1436 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1436 SdHoareTripleChecker+Valid, 1593 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:53,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1436 Valid, 1593 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:18:53,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12958 states. [2022-11-25 22:18:55,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12958 to 12940. [2022-11-25 22:18:55,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12940 states, 12938 states have (on average 1.3769516153965065) internal successors, (17815), 12939 states have internal predecessors, (17815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:55,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12940 states to 12940 states and 17815 transitions. [2022-11-25 22:18:55,259 INFO L78 Accepts]: Start accepts. Automaton has 12940 states and 17815 transitions. Word has length 212 [2022-11-25 22:18:55,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:55,259 INFO L495 AbstractCegarLoop]: Abstraction has 12940 states and 17815 transitions. [2022-11-25 22:18:55,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:55,260 INFO L276 IsEmpty]: Start isEmpty. Operand 12940 states and 17815 transitions. [2022-11-25 22:18:55,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-25 22:18:55,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:55,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:18:55,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 22:18:55,283 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:55,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:55,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1021752494, now seen corresponding path program 1 times [2022-11-25 22:18:55,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:55,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185785106] [2022-11-25 22:18:55,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:55,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:18:55,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:55,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185785106] [2022-11-25 22:18:55,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185785106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:18:55,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:18:55,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:18:55,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105111897] [2022-11-25 22:18:55,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:18:55,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:18:55,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:55,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:18:55,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:18:55,467 INFO L87 Difference]: Start difference. First operand 12940 states and 17815 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:58,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:58,433 INFO L93 Difference]: Finished difference Result 36743 states and 50286 transitions. [2022-11-25 22:18:58,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:18:58,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 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 214 [2022-11-25 22:18:58,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:58,502 INFO L225 Difference]: With dead ends: 36743 [2022-11-25 22:18:58,503 INFO L226 Difference]: Without dead ends: 25365 [2022-11-25 22:18:58,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:18:58,520 INFO L413 NwaCegarLoop]: 1200 mSDtfsCounter, 543 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 1812 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:58,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 1812 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:18:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25365 states. [2022-11-25 22:19:01,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25365 to 25347. [2022-11-25 22:19:01,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25347 states, 25345 states have (on average 1.3698165318603275) internal successors, (34718), 25346 states have internal predecessors, (34718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:19:01,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25347 states to 25347 states and 34718 transitions. [2022-11-25 22:19:01,454 INFO L78 Accepts]: Start accepts. Automaton has 25347 states and 34718 transitions. Word has length 214 [2022-11-25 22:19:01,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:19:01,455 INFO L495 AbstractCegarLoop]: Abstraction has 25347 states and 34718 transitions. [2022-11-25 22:19:01,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:19:01,456 INFO L276 IsEmpty]: Start isEmpty. Operand 25347 states and 34718 transitions. [2022-11-25 22:19:01,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-25 22:19:01,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:19:01,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:19:01,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 22:19:01,494 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:19:01,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:19:01,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1740507394, now seen corresponding path program 1 times [2022-11-25 22:19:01,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:19:01,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57130454] [2022-11-25 22:19:01,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:01,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:19:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:19:01,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:19:01,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57130454] [2022-11-25 22:19:01,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57130454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:19:01,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:19:01,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:19:01,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457021930] [2022-11-25 22:19:01,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:19:01,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:19:01,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:19:01,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:19:01,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:19:01,616 INFO L87 Difference]: Start difference. First operand 25347 states and 34718 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:19:06,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:19:06,834 INFO L93 Difference]: Finished difference Result 74106 states and 101272 transitions. [2022-11-25 22:19:06,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:19:06,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 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 214 [2022-11-25 22:19:06,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:19:06,987 INFO L225 Difference]: With dead ends: 74106 [2022-11-25 22:19:06,987 INFO L226 Difference]: Without dead ends: 50445 [2022-11-25 22:19:07,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:19:07,019 INFO L413 NwaCegarLoop]: 1247 mSDtfsCounter, 646 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 1879 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:19:07,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 1879 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:19:07,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50445 states. [2022-11-25 22:19:10,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50445 to 25380. [2022-11-25 22:19:10,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25380 states, 25378 states have (on average 1.369335645046891) internal successors, (34751), 25379 states have internal predecessors, (34751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:19:10,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25380 states to 25380 states and 34751 transitions. [2022-11-25 22:19:10,294 INFO L78 Accepts]: Start accepts. Automaton has 25380 states and 34751 transitions. Word has length 214 [2022-11-25 22:19:10,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:19:10,295 INFO L495 AbstractCegarLoop]: Abstraction has 25380 states and 34751 transitions. [2022-11-25 22:19:10,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:19:10,295 INFO L276 IsEmpty]: Start isEmpty. Operand 25380 states and 34751 transitions. [2022-11-25 22:19:10,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-11-25 22:19:10,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:19:10,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:19:10,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 22:19:10,336 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:19:10,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:19:10,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1188365351, now seen corresponding path program 1 times [2022-11-25 22:19:10,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:19:10,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851927234] [2022-11-25 22:19:10,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:10,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:19:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:19:10,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:19:10,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851927234] [2022-11-25 22:19:10,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851927234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:19:10,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:19:10,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:19:10,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323180982] [2022-11-25 22:19:10,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:19:10,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:19:10,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:19:10,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:19:10,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:19:10,973 INFO L87 Difference]: Start difference. First operand 25380 states and 34751 transitions. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:19:16,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:19:16,892 INFO L93 Difference]: Finished difference Result 73431 states and 100236 transitions. [2022-11-25 22:19:16,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:19:16,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 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 215 [2022-11-25 22:19:16,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:19:16,993 INFO L225 Difference]: With dead ends: 73431 [2022-11-25 22:19:16,993 INFO L226 Difference]: Without dead ends: 48251 [2022-11-25 22:19:17,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:19:17,022 INFO L413 NwaCegarLoop]: 1003 mSDtfsCounter, 1545 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1545 SdHoareTripleChecker+Valid, 2215 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:19:17,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1545 Valid, 2215 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:19:17,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48251 states. [2022-11-25 22:19:22,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48251 to 48233. [2022-11-25 22:19:22,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48233 states, 48231 states have (on average 1.357425722045987) internal successors, (65470), 48232 states have internal predecessors, (65470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:19:22,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48233 states to 48233 states and 65470 transitions. [2022-11-25 22:19:22,847 INFO L78 Accepts]: Start accepts. Automaton has 48233 states and 65470 transitions. Word has length 215 [2022-11-25 22:19:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:19:22,848 INFO L495 AbstractCegarLoop]: Abstraction has 48233 states and 65470 transitions. [2022-11-25 22:19:22,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:19:22,848 INFO L276 IsEmpty]: Start isEmpty. Operand 48233 states and 65470 transitions. [2022-11-25 22:19:22,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-11-25 22:19:22,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:19:22,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:19:22,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 22:19:22,932 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:19:22,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:19:22,933 INFO L85 PathProgramCache]: Analyzing trace with hash -900085217, now seen corresponding path program 1 times [2022-11-25 22:19:22,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:19:22,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056898517] [2022-11-25 22:19:22,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:22,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:19:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:19:23,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:19:23,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056898517] [2022-11-25 22:19:23,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056898517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:19:23,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:19:23,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:19:23,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816976341] [2022-11-25 22:19:23,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:19:23,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:19:23,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:19:23,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:19:23,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:19:23,578 INFO L87 Difference]: Start difference. First operand 48233 states and 65470 transitions. Second operand has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)