./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-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_31d8806d-80b5-4d46-9006-fa25f0432183/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d8806d-80b5-4d46-9006-fa25f0432183/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_31d8806d-80b5-4d46-9006-fa25f0432183/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d8806d-80b5-4d46-9006-fa25f0432183/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d8806d-80b5-4d46-9006-fa25f0432183/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_31d8806d-80b5-4d46-9006-fa25f0432183/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 eb6a86313c6847913ca8b6f4f78c128447d9c9cbacc492e7ef1a5540e3f6a711 --- 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 [2022-11-26 00:38:52,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:38:52,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:38:52,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:38:52,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:38:52,468 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:38:52,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:38:52,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:38:52,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:38:52,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:38:52,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:38:52,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:38:52,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:38:52,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:38:52,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:38:52,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:38:52,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:38:52,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:38:52,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:38:52,487 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:38:52,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:38:52,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:38:52,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:38:52,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:38:52,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:38:52,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:38:52,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:38:52,498 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:38:52,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:38:52,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:38:52,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:38:52,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:38:52,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:38:52,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:38:52,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:38:52,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:38:52,506 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:38:52,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:38:52,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:38:52,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:38:52,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:38:52,509 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d8806d-80b5-4d46-9006-fa25f0432183/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:38:52,533 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:38:52,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:38:52,534 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:38:52,534 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:38:52,535 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:38:52,535 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:38:52,536 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:38:52,536 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:38:52,536 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:38:52,536 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:38:52,536 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:38:52,537 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:38:52,537 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:38:52,537 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:38:52,537 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:38:52,538 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:38:52,538 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:38:52,538 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:38:52,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:38:52,539 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:38:52,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:38:52,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:38:52,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:38:52,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:38:52,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:38:52,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:38:52,541 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:38:52,541 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:38:52,541 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:38:52,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:38:52,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:38:52,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:38:52,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:38:52,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:38:52,543 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:38:52,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:38:52,543 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:38:52,543 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:38:52,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:38:52,544 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:38:52,544 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:38:52,544 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_31d8806d-80b5-4d46-9006-fa25f0432183/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d8806d-80b5-4d46-9006-fa25f0432183/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb6a86313c6847913ca8b6f4f78c128447d9c9cbacc492e7ef1a5540e3f6a711 [2022-11-26 00:38:52,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:38:52,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:38:52,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:38:52,843 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:38:52,844 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:38:52,845 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d8806d-80b5-4d46-9006-fa25f0432183/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-26 00:38:55,887 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:38:56,151 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:38:56,152 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d8806d-80b5-4d46-9006-fa25f0432183/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-26 00:38:56,164 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d8806d-80b5-4d46-9006-fa25f0432183/bin/utaipan-ByfvJB40ur/data/3b0f54cb0/7cc80b1846f043b8aee9b046ed81a7e9/FLAG1d44e94e0 [2022-11-26 00:38:56,179 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d8806d-80b5-4d46-9006-fa25f0432183/bin/utaipan-ByfvJB40ur/data/3b0f54cb0/7cc80b1846f043b8aee9b046ed81a7e9 [2022-11-26 00:38:56,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:38:56,183 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:38:56,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:38:56,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:38:56,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:38:56,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:38:56" (1/1) ... [2022-11-26 00:38:56,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@778bd3a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:56, skipping insertion in model container [2022-11-26 00:38:56,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:38:56" (1/1) ... [2022-11-26 00:38:56,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:38:56,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:38:56,528 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_31d8806d-80b5-4d46-9006-fa25f0432183/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8460,8473] [2022-11-26 00:38:56,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:38:56,608 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:38:56,680 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_31d8806d-80b5-4d46-9006-fa25f0432183/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8460,8473] [2022-11-26 00:38:56,731 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:38:56,750 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:38:56,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:56 WrapperNode [2022-11-26 00:38:56,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:38:56,752 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:38:56,752 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:38:56,752 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:38:56,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:56" (1/1) ... [2022-11-26 00:38:56,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:56" (1/1) ... [2022-11-26 00:38:56,810 INFO L138 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 766 [2022-11-26 00:38:56,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:38:56,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:38:56,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:38:56,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:38:56,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:56" (1/1) ... [2022-11-26 00:38:56,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:56" (1/1) ... [2022-11-26 00:38:56,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:56" (1/1) ... [2022-11-26 00:38:56,826 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:56" (1/1) ... [2022-11-26 00:38:56,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:56" (1/1) ... [2022-11-26 00:38:56,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:56" (1/1) ... [2022-11-26 00:38:56,844 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:56" (1/1) ... [2022-11-26 00:38:56,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:56" (1/1) ... [2022-11-26 00:38:56,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:38:56,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:38:56,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:38:56,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:38:56,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:56" (1/1) ... [2022-11-26 00:38:56,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:38:56,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d8806d-80b5-4d46-9006-fa25f0432183/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:56,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d8806d-80b5-4d46-9006-fa25f0432183/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:38:56,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d8806d-80b5-4d46-9006-fa25f0432183/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:38:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:38:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:38:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:38:56,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:38:57,141 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:38:57,143 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:38:58,015 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:38:58,284 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:38:58,284 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-26 00:38:58,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:38:58 BoogieIcfgContainer [2022-11-26 00:38:58,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:38:58,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:38:58,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:38:58,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:38:58,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:38:56" (1/3) ... [2022-11-26 00:38:58,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d8a8ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:38:58, skipping insertion in model container [2022-11-26 00:38:58,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:56" (2/3) ... [2022-11-26 00:38:58,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d8a8ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:38:58, skipping insertion in model container [2022-11-26 00:38:58,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:38:58" (3/3) ... [2022-11-26 00:38:58,299 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-26 00:38:58,318 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:38:58,318 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:38:58,369 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:38:58,375 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;@33cfa711, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:38:58,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:38:58,380 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 151 states have (on average 1.7086092715231789) internal successors, (258), 152 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:58,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-26 00:38:58,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:58,389 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] [2022-11-26 00:38:58,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:38:58,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:58,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2059890295, now seen corresponding path program 1 times [2022-11-26 00:38:58,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:58,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022573691] [2022-11-26 00:38:58,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:58,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:59,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:59,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022573691] [2022-11-26 00:38:59,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022573691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:59,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:38:59,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:38:59,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634865136] [2022-11-26 00:38:59,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:59,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:38:59,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:59,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:38:59,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:38:59,309 INFO L87 Difference]: Start difference. First operand has 153 states, 151 states have (on average 1.7086092715231789) internal successors, (258), 152 states have internal predecessors, (258), 0 states have call successors, (0), 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 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:59,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:59,923 INFO L93 Difference]: Finished difference Result 535 states and 857 transitions. [2022-11-26 00:38:59,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:38:59,926 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-26 00:38:59,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:59,948 INFO L225 Difference]: With dead ends: 535 [2022-11-26 00:38:59,949 INFO L226 Difference]: Without dead ends: 445 [2022-11-26 00:38:59,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:38:59,958 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 747 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:59,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 1020 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:38:59,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-11-26 00:39:00,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 437. [2022-11-26 00:39:00,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.4059633027522935) internal successors, (613), 436 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:00,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 613 transitions. [2022-11-26 00:39:00,116 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 613 transitions. Word has length 66 [2022-11-26 00:39:00,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:00,117 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 613 transitions. [2022-11-26 00:39:00,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:00,118 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 613 transitions. [2022-11-26 00:39:00,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-26 00:39:00,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:00,129 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] [2022-11-26 00:39:00,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:39:00,130 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:00,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:00,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2092121495, now seen corresponding path program 1 times [2022-11-26 00:39:00,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:00,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132614206] [2022-11-26 00:39:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:00,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:00,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:00,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132614206] [2022-11-26 00:39:00,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132614206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:00,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:00,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:39:00,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408845706] [2022-11-26 00:39:00,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:00,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:39:00,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:00,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:39:00,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:39:00,417 INFO L87 Difference]: Start difference. First operand 437 states and 613 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:00,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:00,835 INFO L93 Difference]: Finished difference Result 1045 states and 1509 transitions. [2022-11-26 00:39:00,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:39:00,836 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2022-11-26 00:39:00,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:00,839 INFO L225 Difference]: With dead ends: 1045 [2022-11-26 00:39:00,839 INFO L226 Difference]: Without dead ends: 684 [2022-11-26 00:39:00,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:39:00,842 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 526 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:00,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 219 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:39:00,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-11-26 00:39:00,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 682. [2022-11-26 00:39:00,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 1.4375917767988253) internal successors, (979), 681 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:00,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 979 transitions. [2022-11-26 00:39:00,976 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 979 transitions. Word has length 67 [2022-11-26 00:39:00,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:00,977 INFO L495 AbstractCegarLoop]: Abstraction has 682 states and 979 transitions. [2022-11-26 00:39:00,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:00,977 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 979 transitions. [2022-11-26 00:39:00,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-26 00:39:00,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:00,982 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] [2022-11-26 00:39:00,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:39:00,987 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:00,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:00,990 INFO L85 PathProgramCache]: Analyzing trace with hash 121693383, now seen corresponding path program 1 times [2022-11-26 00:39:00,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:00,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007612602] [2022-11-26 00:39:00,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:00,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:01,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:01,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007612602] [2022-11-26 00:39:01,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007612602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:01,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:01,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:39:01,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655692912] [2022-11-26 00:39:01,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:01,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:39:01,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:01,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:39:01,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:39:01,174 INFO L87 Difference]: Start difference. First operand 682 states and 979 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:01,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:01,637 INFO L93 Difference]: Finished difference Result 1716 states and 2525 transitions. [2022-11-26 00:39:01,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:39:01,638 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2022-11-26 00:39:01,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:01,645 INFO L225 Difference]: With dead ends: 1716 [2022-11-26 00:39:01,646 INFO L226 Difference]: Without dead ends: 1174 [2022-11-26 00:39:01,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:39:01,655 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 533 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:01,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 228 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:39:01,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-11-26 00:39:01,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1172. [2022-11-26 00:39:01,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1171 states have (on average 1.4611443210930828) internal successors, (1711), 1171 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1711 transitions. [2022-11-26 00:39:01,902 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1711 transitions. Word has length 67 [2022-11-26 00:39:01,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:01,903 INFO L495 AbstractCegarLoop]: Abstraction has 1172 states and 1711 transitions. [2022-11-26 00:39:01,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:01,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1711 transitions. [2022-11-26 00:39:01,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-26 00:39:01,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:01,906 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] [2022-11-26 00:39:01,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:39:01,907 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:01,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:01,908 INFO L85 PathProgramCache]: Analyzing trace with hash -641840520, now seen corresponding path program 1 times [2022-11-26 00:39:01,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:01,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639899902] [2022-11-26 00:39:01,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:01,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:02,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:02,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639899902] [2022-11-26 00:39:02,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639899902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:02,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:02,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:39:02,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385086057] [2022-11-26 00:39:02,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:02,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:39:02,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:02,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:39:02,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:39:02,114 INFO L87 Difference]: Start difference. First operand 1172 states and 1711 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:02,771 INFO L93 Difference]: Finished difference Result 3220 states and 4773 transitions. [2022-11-26 00:39:02,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:39:02,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2022-11-26 00:39:02,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:02,779 INFO L225 Difference]: With dead ends: 3220 [2022-11-26 00:39:02,780 INFO L226 Difference]: Without dead ends: 2154 [2022-11-26 00:39:02,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:39:02,783 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 503 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:02,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 227 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:39:02,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2022-11-26 00:39:03,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2152. [2022-11-26 00:39:03,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 1.4718735471873547) internal successors, (3166), 2151 states have internal predecessors, (3166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:03,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3166 transitions. [2022-11-26 00:39:03,170 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3166 transitions. Word has length 67 [2022-11-26 00:39:03,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:03,171 INFO L495 AbstractCegarLoop]: Abstraction has 2152 states and 3166 transitions. [2022-11-26 00:39:03,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:03,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3166 transitions. [2022-11-26 00:39:03,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-26 00:39:03,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:03,173 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] [2022-11-26 00:39:03,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:39:03,173 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:03,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:03,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1808675686, now seen corresponding path program 1 times [2022-11-26 00:39:03,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:03,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817803998] [2022-11-26 00:39:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:03,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:03,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:03,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817803998] [2022-11-26 00:39:03,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817803998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:03,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:03,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:39:03,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214398759] [2022-11-26 00:39:03,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:03,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:39:03,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:03,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:39:03,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:39:03,353 INFO L87 Difference]: Start difference. First operand 2152 states and 3166 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:04,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:04,342 INFO L93 Difference]: Finished difference Result 6213 states and 9215 transitions. [2022-11-26 00:39:04,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:39:04,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2022-11-26 00:39:04,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:04,356 INFO L225 Difference]: With dead ends: 6213 [2022-11-26 00:39:04,357 INFO L226 Difference]: Without dead ends: 4114 [2022-11-26 00:39:04,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:39:04,361 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 519 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:04,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 211 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:39:04,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4114 states. [2022-11-26 00:39:05,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4114 to 4112. [2022-11-26 00:39:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4112 states, 4111 states have (on average 1.4699586475310145) internal successors, (6043), 4111 states have internal predecessors, (6043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:05,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4112 states to 4112 states and 6043 transitions. [2022-11-26 00:39:05,091 INFO L78 Accepts]: Start accepts. Automaton has 4112 states and 6043 transitions. Word has length 67 [2022-11-26 00:39:05,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:05,091 INFO L495 AbstractCegarLoop]: Abstraction has 4112 states and 6043 transitions. [2022-11-26 00:39:05,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:05,092 INFO L276 IsEmpty]: Start isEmpty. Operand 4112 states and 6043 transitions. [2022-11-26 00:39:05,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-26 00:39:05,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:05,093 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] [2022-11-26 00:39:05,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:39:05,094 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:05,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:05,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1731548323, now seen corresponding path program 1 times [2022-11-26 00:39:05,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:05,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460542285] [2022-11-26 00:39:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:05,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:06,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:06,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460542285] [2022-11-26 00:39:06,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460542285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:06,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:06,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-26 00:39:06,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410087672] [2022-11-26 00:39:06,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:06,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 00:39:06,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:06,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 00:39:06,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:39:06,924 INFO L87 Difference]: Start difference. First operand 4112 states and 6043 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:09,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:09,615 INFO L93 Difference]: Finished difference Result 8087 states and 11830 transitions. [2022-11-26 00:39:09,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:39:09,616 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2022-11-26 00:39:09,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:09,648 INFO L225 Difference]: With dead ends: 8087 [2022-11-26 00:39:09,649 INFO L226 Difference]: Without dead ends: 8085 [2022-11-26 00:39:09,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:39:09,652 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 834 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 1745 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:09,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 1745 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:39:09,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8085 states. [2022-11-26 00:39:10,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8085 to 6249. [2022-11-26 00:39:10,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6249 states, 6248 states have (on average 1.4638284250960307) internal successors, (9146), 6248 states have internal predecessors, (9146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:10,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6249 states to 6249 states and 9146 transitions. [2022-11-26 00:39:10,781 INFO L78 Accepts]: Start accepts. Automaton has 6249 states and 9146 transitions. Word has length 68 [2022-11-26 00:39:10,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:10,782 INFO L495 AbstractCegarLoop]: Abstraction has 6249 states and 9146 transitions. [2022-11-26 00:39:10,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:10,782 INFO L276 IsEmpty]: Start isEmpty. Operand 6249 states and 9146 transitions. [2022-11-26 00:39:10,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-26 00:39:10,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:10,784 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] [2022-11-26 00:39:10,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:39:10,784 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:10,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:10,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1413745437, now seen corresponding path program 1 times [2022-11-26 00:39:10,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:10,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400248073] [2022-11-26 00:39:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:10,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:12,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:12,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400248073] [2022-11-26 00:39:12,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400248073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:12,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:12,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-26 00:39:12,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519117057] [2022-11-26 00:39:12,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:12,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 00:39:12,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:12,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 00:39:12,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:39:12,428 INFO L87 Difference]: Start difference. First operand 6249 states and 9146 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:14,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:14,974 INFO L93 Difference]: Finished difference Result 10238 states and 14947 transitions. [2022-11-26 00:39:14,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:39:14,975 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2022-11-26 00:39:14,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:15,013 INFO L225 Difference]: With dead ends: 10238 [2022-11-26 00:39:15,013 INFO L226 Difference]: Without dead ends: 10236 [2022-11-26 00:39:15,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:39:15,018 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 876 mSDsluCounter, 1214 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:15,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [876 Valid, 1453 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:39:15,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10236 states. [2022-11-26 00:39:16,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10236 to 6277. [2022-11-26 00:39:16,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6277 states, 6276 states have (on average 1.4623964308476736) internal successors, (9178), 6276 states have internal predecessors, (9178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:16,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6277 states to 6277 states and 9178 transitions. [2022-11-26 00:39:16,054 INFO L78 Accepts]: Start accepts. Automaton has 6277 states and 9178 transitions. Word has length 68 [2022-11-26 00:39:16,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:16,054 INFO L495 AbstractCegarLoop]: Abstraction has 6277 states and 9178 transitions. [2022-11-26 00:39:16,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:16,055 INFO L276 IsEmpty]: Start isEmpty. Operand 6277 states and 9178 transitions. [2022-11-26 00:39:16,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-26 00:39:16,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:16,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:16,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:39:16,056 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:16,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:16,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1230260419, now seen corresponding path program 1 times [2022-11-26 00:39:16,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:16,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19445925] [2022-11-26 00:39:16,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:16,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:17,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:17,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19445925] [2022-11-26 00:39:17,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19445925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:17,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:17,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-26 00:39:17,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186450454] [2022-11-26 00:39:17,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:17,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 00:39:17,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:17,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 00:39:17,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:39:17,566 INFO L87 Difference]: Start difference. First operand 6277 states and 9178 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:19,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:19,969 INFO L93 Difference]: Finished difference Result 8939 states and 13031 transitions. [2022-11-26 00:39:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:39:19,970 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2022-11-26 00:39:19,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:19,989 INFO L225 Difference]: With dead ends: 8939 [2022-11-26 00:39:19,989 INFO L226 Difference]: Without dead ends: 8025 [2022-11-26 00:39:19,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:39:19,994 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 941 mSDsluCounter, 1227 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:19,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [941 Valid, 1549 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:39:20,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8025 states. [2022-11-26 00:39:21,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8025 to 7112. [2022-11-26 00:39:21,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7112 states, 7111 states have (on average 1.459710307973562) internal successors, (10380), 7111 states have internal predecessors, (10380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:21,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7112 states to 7112 states and 10380 transitions. [2022-11-26 00:39:21,038 INFO L78 Accepts]: Start accepts. Automaton has 7112 states and 10380 transitions. Word has length 68 [2022-11-26 00:39:21,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:21,039 INFO L495 AbstractCegarLoop]: Abstraction has 7112 states and 10380 transitions. [2022-11-26 00:39:21,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:21,039 INFO L276 IsEmpty]: Start isEmpty. Operand 7112 states and 10380 transitions. [2022-11-26 00:39:21,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-26 00:39:21,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:21,041 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] [2022-11-26 00:39:21,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:39:21,041 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:21,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:21,042 INFO L85 PathProgramCache]: Analyzing trace with hash 818997117, now seen corresponding path program 1 times [2022-11-26 00:39:21,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:21,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215647632] [2022-11-26 00:39:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:21,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:22,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:22,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215647632] [2022-11-26 00:39:22,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215647632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:22,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:22,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-26 00:39:22,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998843834] [2022-11-26 00:39:22,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:22,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 00:39:22,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:22,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 00:39:22,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:39:22,403 INFO L87 Difference]: Start difference. First operand 7112 states and 10380 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:25,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:25,209 INFO L93 Difference]: Finished difference Result 12438 states and 18167 transitions. [2022-11-26 00:39:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:39:25,210 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2022-11-26 00:39:25,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:25,244 INFO L225 Difference]: With dead ends: 12438 [2022-11-26 00:39:25,244 INFO L226 Difference]: Without dead ends: 12436 [2022-11-26 00:39:25,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:39:25,250 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 837 mSDsluCounter, 1568 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1902 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:25,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 1902 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:39:25,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12436 states. [2022-11-26 00:39:26,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12436 to 7874. [2022-11-26 00:39:26,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7874 states, 7873 states have (on average 1.4603073796519752) internal successors, (11497), 7873 states have internal predecessors, (11497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:26,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7874 states to 7874 states and 11497 transitions. [2022-11-26 00:39:26,368 INFO L78 Accepts]: Start accepts. Automaton has 7874 states and 11497 transitions. Word has length 68 [2022-11-26 00:39:26,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:26,368 INFO L495 AbstractCegarLoop]: Abstraction has 7874 states and 11497 transitions. [2022-11-26 00:39:26,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:26,369 INFO L276 IsEmpty]: Start isEmpty. Operand 7874 states and 11497 transitions. [2022-11-26 00:39:26,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-26 00:39:26,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:26,371 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] [2022-11-26 00:39:26,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:39:26,371 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:26,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:26,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1700992895, now seen corresponding path program 1 times [2022-11-26 00:39:26,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:26,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413335639] [2022-11-26 00:39:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:26,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:26,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:26,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413335639] [2022-11-26 00:39:26,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413335639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:26,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:26,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:39:26,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568192311] [2022-11-26 00:39:26,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:26,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:39:26,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:26,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:39:26,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:39:26,470 INFO L87 Difference]: Start difference. First operand 7874 states and 11497 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:27,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:27,806 INFO L93 Difference]: Finished difference Result 11924 states and 17470 transitions. [2022-11-26 00:39:27,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:39:27,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2022-11-26 00:39:27,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:27,824 INFO L225 Difference]: With dead ends: 11924 [2022-11-26 00:39:27,824 INFO L226 Difference]: Without dead ends: 7874 [2022-11-26 00:39:27,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:39:27,832 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 433 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:27,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 164 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:39:27,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7874 states. [2022-11-26 00:39:28,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7874 to 7874. [2022-11-26 00:39:28,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7874 states, 7873 states have (on average 1.4601803632668615) internal successors, (11496), 7873 states have internal predecessors, (11496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7874 states to 7874 states and 11496 transitions. [2022-11-26 00:39:28,943 INFO L78 Accepts]: Start accepts. Automaton has 7874 states and 11496 transitions. Word has length 68 [2022-11-26 00:39:28,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:28,943 INFO L495 AbstractCegarLoop]: Abstraction has 7874 states and 11496 transitions. [2022-11-26 00:39:28,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:28,944 INFO L276 IsEmpty]: Start isEmpty. Operand 7874 states and 11496 transitions. [2022-11-26 00:39:28,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-26 00:39:28,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:28,945 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] [2022-11-26 00:39:28,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:39:28,946 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:28,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:28,946 INFO L85 PathProgramCache]: Analyzing trace with hash -432796759, now seen corresponding path program 1 times [2022-11-26 00:39:28,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:28,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537735633] [2022-11-26 00:39:28,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:28,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:30,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:30,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537735633] [2022-11-26 00:39:30,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537735633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:30,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:30,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-26 00:39:30,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657590574] [2022-11-26 00:39:30,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:30,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 00:39:30,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:30,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 00:39:30,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:39:30,286 INFO L87 Difference]: Start difference. First operand 7874 states and 11496 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:33,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:33,303 INFO L93 Difference]: Finished difference Result 15142 states and 22183 transitions. [2022-11-26 00:39:33,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:39:33,303 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2022-11-26 00:39:33,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:33,334 INFO L225 Difference]: With dead ends: 15142 [2022-11-26 00:39:33,335 INFO L226 Difference]: Without dead ends: 15140 [2022-11-26 00:39:33,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:39:33,340 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 753 mSDsluCounter, 1843 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 2177 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:33,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [753 Valid, 2177 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:39:33,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15140 states. [2022-11-26 00:39:35,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15140 to 8969. [2022-11-26 00:39:35,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8969 states, 8968 states have (on average 1.4623104371097235) internal successors, (13114), 8968 states have internal predecessors, (13114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:35,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 13114 transitions. [2022-11-26 00:39:35,254 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 13114 transitions. Word has length 69 [2022-11-26 00:39:35,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:35,255 INFO L495 AbstractCegarLoop]: Abstraction has 8969 states and 13114 transitions. [2022-11-26 00:39:35,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:35,255 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 13114 transitions. [2022-11-26 00:39:35,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-26 00:39:35,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:35,257 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] [2022-11-26 00:39:35,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:39:35,257 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:35,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:35,258 INFO L85 PathProgramCache]: Analyzing trace with hash 773762065, now seen corresponding path program 1 times [2022-11-26 00:39:35,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:35,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262029360] [2022-11-26 00:39:35,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:35,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:37,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:37,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262029360] [2022-11-26 00:39:37,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262029360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:37,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:37,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-11-26 00:39:37,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594370795] [2022-11-26 00:39:37,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:37,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:39:37,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:37,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:39:37,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:39:37,590 INFO L87 Difference]: Start difference. First operand 8969 states and 13114 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:43,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:43,849 INFO L93 Difference]: Finished difference Result 13184 states and 19217 transitions. [2022-11-26 00:39:43,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:39:43,850 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2022-11-26 00:39:43,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:43,868 INFO L225 Difference]: With dead ends: 13184 [2022-11-26 00:39:43,868 INFO L226 Difference]: Without dead ends: 12270 [2022-11-26 00:39:43,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=330, Invalid=1392, Unknown=0, NotChecked=0, Total=1722 [2022-11-26 00:39:43,872 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 1279 mSDsluCounter, 2404 mSDsCounter, 0 mSdLazyCounter, 2852 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 2692 SdHoareTripleChecker+Invalid, 2862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:43,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1279 Valid, 2692 Invalid, 2862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2852 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-26 00:39:43,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12270 states. [2022-11-26 00:39:45,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12270 to 8969. [2022-11-26 00:39:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8969 states, 8968 states have (on average 1.4623104371097235) internal successors, (13114), 8968 states have internal predecessors, (13114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:45,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 13114 transitions. [2022-11-26 00:39:45,408 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 13114 transitions. Word has length 70 [2022-11-26 00:39:45,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:45,408 INFO L495 AbstractCegarLoop]: Abstraction has 8969 states and 13114 transitions. [2022-11-26 00:39:45,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:45,408 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 13114 transitions. [2022-11-26 00:39:45,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-26 00:39:45,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:45,410 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] [2022-11-26 00:39:45,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:39:45,410 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:45,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:45,411 INFO L85 PathProgramCache]: Analyzing trace with hash -175860783, now seen corresponding path program 1 times [2022-11-26 00:39:45,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:45,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151951150] [2022-11-26 00:39:45,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:45,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:47,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:47,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151951150] [2022-11-26 00:39:47,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151951150] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:47,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:47,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-11-26 00:39:47,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717642893] [2022-11-26 00:39:47,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:47,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:39:47,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:47,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:39:47,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:39:47,881 INFO L87 Difference]: Start difference. First operand 8969 states and 13114 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:53,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:53,011 INFO L93 Difference]: Finished difference Result 11677 states and 16989 transitions. [2022-11-26 00:39:53,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-26 00:39:53,011 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2022-11-26 00:39:53,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:53,023 INFO L225 Difference]: With dead ends: 11677 [2022-11-26 00:39:53,024 INFO L226 Difference]: Without dead ends: 11675 [2022-11-26 00:39:53,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=328, Invalid=1312, Unknown=0, NotChecked=0, Total=1640 [2022-11-26 00:39:53,027 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 1108 mSDsluCounter, 1927 mSDsCounter, 0 mSdLazyCounter, 2600 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 2171 SdHoareTripleChecker+Invalid, 2609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:53,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1108 Valid, 2171 Invalid, 2609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2600 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-26 00:39:53,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11675 states. [2022-11-26 00:39:54,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11675 to 8975. [2022-11-26 00:39:54,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8975 states, 8974 states have (on average 1.4621127702250947) internal successors, (13121), 8974 states have internal predecessors, (13121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8975 states to 8975 states and 13121 transitions. [2022-11-26 00:39:54,524 INFO L78 Accepts]: Start accepts. Automaton has 8975 states and 13121 transitions. Word has length 70 [2022-11-26 00:39:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:54,524 INFO L495 AbstractCegarLoop]: Abstraction has 8975 states and 13121 transitions. [2022-11-26 00:39:54,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:54,525 INFO L276 IsEmpty]: Start isEmpty. Operand 8975 states and 13121 transitions. [2022-11-26 00:39:54,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-26 00:39:54,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:54,526 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] [2022-11-26 00:39:54,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:39:54,527 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:54,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:54,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1079684015, now seen corresponding path program 1 times [2022-11-26 00:39:54,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:54,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018657757] [2022-11-26 00:39:54,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:54,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:56,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:56,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018657757] [2022-11-26 00:39:56,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018657757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:56,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:56,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-11-26 00:39:56,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289302320] [2022-11-26 00:39:56,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:56,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:39:56,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:56,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:39:56,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:39:56,909 INFO L87 Difference]: Start difference. First operand 8975 states and 13121 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:03,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:03,638 INFO L93 Difference]: Finished difference Result 15740 states and 22981 transitions. [2022-11-26 00:40:03,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-26 00:40:03,638 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2022-11-26 00:40:03,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:03,659 INFO L225 Difference]: With dead ends: 15740 [2022-11-26 00:40:03,659 INFO L226 Difference]: Without dead ends: 15738 [2022-11-26 00:40:03,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=304, Invalid=1256, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:40:03,665 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 1539 mSDsluCounter, 2261 mSDsCounter, 0 mSdLazyCounter, 2930 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1539 SdHoareTripleChecker+Valid, 2595 SdHoareTripleChecker+Invalid, 2938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:03,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1539 Valid, 2595 Invalid, 2938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2930 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-26 00:40:03,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15738 states. [2022-11-26 00:40:05,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15738 to 8986. [2022-11-26 00:40:05,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8986 states, 8985 states have (on average 1.4619922092376183) internal successors, (13136), 8985 states have internal predecessors, (13136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:05,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8986 states to 8986 states and 13136 transitions. [2022-11-26 00:40:05,427 INFO L78 Accepts]: Start accepts. Automaton has 8986 states and 13136 transitions. Word has length 70 [2022-11-26 00:40:05,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:05,428 INFO L495 AbstractCegarLoop]: Abstraction has 8986 states and 13136 transitions. [2022-11-26 00:40:05,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:05,428 INFO L276 IsEmpty]: Start isEmpty. Operand 8986 states and 13136 transitions. [2022-11-26 00:40:05,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-26 00:40:05,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:05,430 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] [2022-11-26 00:40:05,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-26 00:40:05,430 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:40:05,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:05,431 INFO L85 PathProgramCache]: Analyzing trace with hash 2065609745, now seen corresponding path program 1 times [2022-11-26 00:40:05,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:05,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093750655] [2022-11-26 00:40:05,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:05,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:08,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:08,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093750655] [2022-11-26 00:40:08,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093750655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:08,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:08,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-11-26 00:40:08,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978678115] [2022-11-26 00:40:08,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:08,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-26 00:40:08,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:08,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-26 00:40:08,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:40:08,149 INFO L87 Difference]: Start difference. First operand 8986 states and 13136 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:15,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:15,088 INFO L93 Difference]: Finished difference Result 10781 states and 15676 transitions. [2022-11-26 00:40:15,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-26 00:40:15,089 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2022-11-26 00:40:15,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:15,104 INFO L225 Difference]: With dead ends: 10781 [2022-11-26 00:40:15,104 INFO L226 Difference]: Without dead ends: 10779 [2022-11-26 00:40:15,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=476, Invalid=2074, Unknown=0, NotChecked=0, Total=2550 [2022-11-26 00:40:15,109 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 1414 mSDsluCounter, 2702 mSDsCounter, 0 mSdLazyCounter, 4278 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1414 SdHoareTripleChecker+Valid, 2892 SdHoareTripleChecker+Invalid, 4287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 4278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:15,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1414 Valid, 2892 Invalid, 4287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 4278 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-26 00:40:15,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10779 states. [2022-11-26 00:40:16,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10779 to 8996. [2022-11-26 00:40:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8996 states, 8995 states have (on average 1.4618121178432462) internal successors, (13149), 8995 states have internal predecessors, (13149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8996 states to 8996 states and 13149 transitions. [2022-11-26 00:40:16,882 INFO L78 Accepts]: Start accepts. Automaton has 8996 states and 13149 transitions. Word has length 70 [2022-11-26 00:40:16,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:16,882 INFO L495 AbstractCegarLoop]: Abstraction has 8996 states and 13149 transitions. [2022-11-26 00:40:16,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:16,883 INFO L276 IsEmpty]: Start isEmpty. Operand 8996 states and 13149 transitions. [2022-11-26 00:40:16,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-26 00:40:16,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:16,884 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] [2022-11-26 00:40:16,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-26 00:40:16,885 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:40:16,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:16,885 INFO L85 PathProgramCache]: Analyzing trace with hash -578396111, now seen corresponding path program 1 times [2022-11-26 00:40:16,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:16,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469110259] [2022-11-26 00:40:16,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:16,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:18,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:18,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469110259] [2022-11-26 00:40:18,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469110259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:18,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:18,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-11-26 00:40:18,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488635667] [2022-11-26 00:40:18,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:18,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:40:18,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:18,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:40:18,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:40:18,864 INFO L87 Difference]: Start difference. First operand 8996 states and 13149 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:24,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:24,473 INFO L93 Difference]: Finished difference Result 12894 states and 18773 transitions. [2022-11-26 00:40:24,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 00:40:24,474 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2022-11-26 00:40:24,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:24,488 INFO L225 Difference]: With dead ends: 12894 [2022-11-26 00:40:24,488 INFO L226 Difference]: Without dead ends: 11996 [2022-11-26 00:40:24,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2022-11-26 00:40:24,493 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 1035 mSDsluCounter, 2166 mSDsCounter, 0 mSdLazyCounter, 3003 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 2364 SdHoareTripleChecker+Invalid, 3011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:24,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1035 Valid, 2364 Invalid, 3011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3003 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-26 00:40:24,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11996 states. [2022-11-26 00:40:26,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11996 to 9018. [2022-11-26 00:40:26,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9018 states, 9017 states have (on average 1.4611289785959853) internal successors, (13175), 9017 states have internal predecessors, (13175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9018 states to 9018 states and 13175 transitions. [2022-11-26 00:40:26,389 INFO L78 Accepts]: Start accepts. Automaton has 9018 states and 13175 transitions. Word has length 70 [2022-11-26 00:40:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:26,389 INFO L495 AbstractCegarLoop]: Abstraction has 9018 states and 13175 transitions. [2022-11-26 00:40:26,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 9018 states and 13175 transitions. [2022-11-26 00:40:26,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 00:40:26,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:26,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:26,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-26 00:40:26,392 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:40:26,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:26,392 INFO L85 PathProgramCache]: Analyzing trace with hash -2119773475, now seen corresponding path program 1 times [2022-11-26 00:40:26,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:26,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687091740] [2022-11-26 00:40:26,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:26,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:26,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:26,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687091740] [2022-11-26 00:40:26,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687091740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:26,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:26,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:40:26,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181645462] [2022-11-26 00:40:26,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:26,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:40:26,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:26,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:40:26,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:40:26,445 INFO L87 Difference]: Start difference. First operand 9018 states and 13175 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:28,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:28,610 INFO L93 Difference]: Finished difference Result 14893 states and 21862 transitions. [2022-11-26 00:40:28,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:40:28,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2022-11-26 00:40:28,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:28,621 INFO L225 Difference]: With dead ends: 14893 [2022-11-26 00:40:28,621 INFO L226 Difference]: Without dead ends: 8736 [2022-11-26 00:40:28,627 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 [2022-11-26 00:40:28,628 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 128 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:28,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 343 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:40:28,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8736 states. [2022-11-26 00:40:30,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8736 to 8734. [2022-11-26 00:40:30,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8734 states, 8733 states have (on average 1.4594068475896027) internal successors, (12745), 8733 states have internal predecessors, (12745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8734 states to 8734 states and 12745 transitions. [2022-11-26 00:40:30,609 INFO L78 Accepts]: Start accepts. Automaton has 8734 states and 12745 transitions. Word has length 71 [2022-11-26 00:40:30,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:30,610 INFO L495 AbstractCegarLoop]: Abstraction has 8734 states and 12745 transitions. [2022-11-26 00:40:30,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand 8734 states and 12745 transitions. [2022-11-26 00:40:30,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 00:40:30,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:30,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:30,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-26 00:40:30,612 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:40:30,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:30,612 INFO L85 PathProgramCache]: Analyzing trace with hash -233311334, now seen corresponding path program 1 times [2022-11-26 00:40:30,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:30,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628223096] [2022-11-26 00:40:30,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:30,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:30,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:30,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628223096] [2022-11-26 00:40:30,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628223096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:30,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:30,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:40:30,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676893018] [2022-11-26 00:40:30,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:30,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:40:30,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:30,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:40:30,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:40:30,662 INFO L87 Difference]: Start difference. First operand 8734 states and 12745 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:32,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:32,715 INFO L93 Difference]: Finished difference Result 16077 states and 23565 transitions. [2022-11-26 00:40:32,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:40:32,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2022-11-26 00:40:32,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:32,724 INFO L225 Difference]: With dead ends: 16077 [2022-11-26 00:40:32,724 INFO L226 Difference]: Without dead ends: 8493 [2022-11-26 00:40:32,730 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 [2022-11-26 00:40:32,730 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 122 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:32,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 333 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:40:32,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8493 states. [2022-11-26 00:40:34,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8493 to 8446. [2022-11-26 00:40:34,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8446 states, 8445 states have (on average 1.4577856719952635) internal successors, (12311), 8445 states have internal predecessors, (12311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:34,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8446 states to 8446 states and 12311 transitions. [2022-11-26 00:40:34,520 INFO L78 Accepts]: Start accepts. Automaton has 8446 states and 12311 transitions. Word has length 71 [2022-11-26 00:40:34,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:34,520 INFO L495 AbstractCegarLoop]: Abstraction has 8446 states and 12311 transitions. [2022-11-26 00:40:34,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:34,521 INFO L276 IsEmpty]: Start isEmpty. Operand 8446 states and 12311 transitions. [2022-11-26 00:40:34,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 00:40:34,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:34,522 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] [2022-11-26 00:40:34,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-26 00:40:34,522 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:40:34,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:34,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1948644408, now seen corresponding path program 1 times [2022-11-26 00:40:34,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:34,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366542141] [2022-11-26 00:40:34,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:34,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:34,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:34,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:34,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366542141] [2022-11-26 00:40:34,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366542141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:34,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:34,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:40:34,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547561692] [2022-11-26 00:40:34,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:34,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:40:34,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:34,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:40:34,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:40:34,574 INFO L87 Difference]: Start difference. First operand 8446 states and 12311 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:36,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:36,723 INFO L93 Difference]: Finished difference Result 14566 states and 21321 transitions. [2022-11-26 00:40:36,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:40:36,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2022-11-26 00:40:36,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:36,732 INFO L225 Difference]: With dead ends: 14566 [2022-11-26 00:40:36,733 INFO L226 Difference]: Without dead ends: 8132 [2022-11-26 00:40:36,738 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 [2022-11-26 00:40:36,739 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 125 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:36,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 331 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:40:36,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8132 states. [2022-11-26 00:40:38,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8132 to 8130. [2022-11-26 00:40:38,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8130 states, 8129 states have (on average 1.4566367326854472) internal successors, (11841), 8129 states have internal predecessors, (11841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:38,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8130 states to 8130 states and 11841 transitions. [2022-11-26 00:40:38,531 INFO L78 Accepts]: Start accepts. Automaton has 8130 states and 11841 transitions. Word has length 71 [2022-11-26 00:40:38,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:38,531 INFO L495 AbstractCegarLoop]: Abstraction has 8130 states and 11841 transitions. [2022-11-26 00:40:38,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:38,531 INFO L276 IsEmpty]: Start isEmpty. Operand 8130 states and 11841 transitions. [2022-11-26 00:40:38,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 00:40:38,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:38,533 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] [2022-11-26 00:40:38,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-26 00:40:38,533 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:40:38,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:38,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1610910475, now seen corresponding path program 1 times [2022-11-26 00:40:38,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:38,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465848133] [2022-11-26 00:40:38,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:38,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:38,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:38,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465848133] [2022-11-26 00:40:38,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465848133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:38,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:38,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:40:38,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703313886] [2022-11-26 00:40:38,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:38,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:40:38,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:38,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:40:38,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:40:38,584 INFO L87 Difference]: Start difference. First operand 8130 states and 11841 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:40,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:40,704 INFO L93 Difference]: Finished difference Result 14201 states and 20779 transitions. [2022-11-26 00:40:40,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:40:40,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2022-11-26 00:40:40,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:40,714 INFO L225 Difference]: With dead ends: 14201 [2022-11-26 00:40:40,714 INFO L226 Difference]: Without dead ends: 7806 [2022-11-26 00:40:40,720 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 [2022-11-26 00:40:40,720 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 124 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:40,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 323 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:40:40,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7806 states. [2022-11-26 00:40:42,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7806 to 7804. [2022-11-26 00:40:42,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7804 states, 7803 states have (on average 1.4563629373317954) internal successors, (11364), 7803 states have internal predecessors, (11364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:42,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7804 states to 7804 states and 11364 transitions. [2022-11-26 00:40:42,338 INFO L78 Accepts]: Start accepts. Automaton has 7804 states and 11364 transitions. Word has length 71 [2022-11-26 00:40:42,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:42,339 INFO L495 AbstractCegarLoop]: Abstraction has 7804 states and 11364 transitions. [2022-11-26 00:40:42,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:42,339 INFO L276 IsEmpty]: Start isEmpty. Operand 7804 states and 11364 transitions. [2022-11-26 00:40:42,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 00:40:42,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:42,340 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] [2022-11-26 00:40:42,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-26 00:40:42,341 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:40:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:42,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1462755971, now seen corresponding path program 1 times [2022-11-26 00:40:42,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:42,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795050483] [2022-11-26 00:40:42,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:42,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:43,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:43,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795050483] [2022-11-26 00:40:43,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795050483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:43,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:43,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-26 00:40:43,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469822427] [2022-11-26 00:40:43,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:43,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 00:40:43,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:43,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 00:40:43,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:40:43,621 INFO L87 Difference]: Start difference. First operand 7804 states and 11364 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:48,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:48,192 INFO L93 Difference]: Finished difference Result 15028 states and 21864 transitions. [2022-11-26 00:40:48,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:40:48,193 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2022-11-26 00:40:48,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:48,210 INFO L225 Difference]: With dead ends: 15028 [2022-11-26 00:40:48,210 INFO L226 Difference]: Without dead ends: 15026 [2022-11-26 00:40:48,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:40:48,214 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 633 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:48,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 1205 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:40:48,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15026 states. [2022-11-26 00:40:49,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15026 to 7804. [2022-11-26 00:40:49,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7804 states, 7803 states have (on average 1.4563629373317954) internal successors, (11364), 7803 states have internal predecessors, (11364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:49,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7804 states to 7804 states and 11364 transitions. [2022-11-26 00:40:49,996 INFO L78 Accepts]: Start accepts. Automaton has 7804 states and 11364 transitions. Word has length 71 [2022-11-26 00:40:49,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:49,996 INFO L495 AbstractCegarLoop]: Abstraction has 7804 states and 11364 transitions. [2022-11-26 00:40:49,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:49,996 INFO L276 IsEmpty]: Start isEmpty. Operand 7804 states and 11364 transitions. [2022-11-26 00:40:49,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 00:40:49,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:49,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:49,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-26 00:40:49,998 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:40:49,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:49,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1682537789, now seen corresponding path program 1 times [2022-11-26 00:40:49,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:49,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665323505] [2022-11-26 00:40:49,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:49,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:51,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:51,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665323505] [2022-11-26 00:40:51,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665323505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:51,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:51,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-26 00:40:51,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417857530] [2022-11-26 00:40:51,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:51,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:40:51,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:51,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:40:51,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:40:51,352 INFO L87 Difference]: Start difference. First operand 7804 states and 11364 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:56,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:56,167 INFO L93 Difference]: Finished difference Result 13955 states and 20270 transitions. [2022-11-26 00:40:56,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:40:56,169 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2022-11-26 00:40:56,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:56,185 INFO L225 Difference]: With dead ends: 13955 [2022-11-26 00:40:56,185 INFO L226 Difference]: Without dead ends: 13953 [2022-11-26 00:40:56,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2022-11-26 00:40:56,190 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 649 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 2276 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:56,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 2276 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:40:56,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13953 states. [2022-11-26 00:40:58,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13953 to 7810. [2022-11-26 00:40:58,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7810 states, 7809 states have (on average 1.456140350877193) internal successors, (11371), 7809 states have internal predecessors, (11371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:58,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7810 states to 7810 states and 11371 transitions. [2022-11-26 00:40:58,294 INFO L78 Accepts]: Start accepts. Automaton has 7810 states and 11371 transitions. Word has length 71 [2022-11-26 00:40:58,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:58,294 INFO L495 AbstractCegarLoop]: Abstraction has 7810 states and 11371 transitions. [2022-11-26 00:40:58,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:58,295 INFO L276 IsEmpty]: Start isEmpty. Operand 7810 states and 11371 transitions. [2022-11-26 00:40:58,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 00:40:58,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:58,296 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] [2022-11-26 00:40:58,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-26 00:40:58,296 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:40:58,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:58,297 INFO L85 PathProgramCache]: Analyzing trace with hash -961468067, now seen corresponding path program 1 times [2022-11-26 00:40:58,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:58,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979104094] [2022-11-26 00:40:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:58,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:00,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:00,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979104094] [2022-11-26 00:41:00,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979104094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:41:00,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:41:00,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-11-26 00:41:00,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247205493] [2022-11-26 00:41:00,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:41:00,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:41:00,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:00,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:41:00,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:41:00,364 INFO L87 Difference]: Start difference. First operand 7810 states and 11371 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:06,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:06,976 INFO L93 Difference]: Finished difference Result 13255 states and 19218 transitions. [2022-11-26 00:41:06,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-26 00:41:06,977 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2022-11-26 00:41:06,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:06,992 INFO L225 Difference]: With dead ends: 13255 [2022-11-26 00:41:06,992 INFO L226 Difference]: Without dead ends: 12453 [2022-11-26 00:41:06,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=309, Invalid=1331, Unknown=0, NotChecked=0, Total=1640 [2022-11-26 00:41:06,997 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 1065 mSDsluCounter, 2318 mSDsCounter, 0 mSdLazyCounter, 2873 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 2568 SdHoareTripleChecker+Invalid, 2882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:06,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1065 Valid, 2568 Invalid, 2882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2873 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-26 00:41:07,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12453 states. [2022-11-26 00:41:09,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12453 to 7810. [2022-11-26 00:41:09,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7810 states, 7809 states have (on average 1.456140350877193) internal successors, (11371), 7809 states have internal predecessors, (11371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:09,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7810 states to 7810 states and 11371 transitions. [2022-11-26 00:41:09,176 INFO L78 Accepts]: Start accepts. Automaton has 7810 states and 11371 transitions. Word has length 71 [2022-11-26 00:41:09,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:09,176 INFO L495 AbstractCegarLoop]: Abstraction has 7810 states and 11371 transitions. [2022-11-26 00:41:09,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:09,177 INFO L276 IsEmpty]: Start isEmpty. Operand 7810 states and 11371 transitions. [2022-11-26 00:41:09,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 00:41:09,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:09,177 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] [2022-11-26 00:41:09,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-26 00:41:09,178 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:09,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:09,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1087789469, now seen corresponding path program 1 times [2022-11-26 00:41:09,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:09,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135498796] [2022-11-26 00:41:09,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:09,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:11,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:11,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:11,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135498796] [2022-11-26 00:41:11,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135498796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:41:11,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:41:11,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-11-26 00:41:11,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188999902] [2022-11-26 00:41:11,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:41:11,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-26 00:41:11,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:11,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-26 00:41:11,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:41:11,644 INFO L87 Difference]: Start difference. First operand 7810 states and 11371 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:18,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:18,895 INFO L93 Difference]: Finished difference Result 12416 states and 18091 transitions. [2022-11-26 00:41:18,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 00:41:18,895 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2022-11-26 00:41:18,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:18,909 INFO L225 Difference]: With dead ends: 12416 [2022-11-26 00:41:18,909 INFO L226 Difference]: Without dead ends: 12414 [2022-11-26 00:41:18,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=415, Invalid=1655, Unknown=0, NotChecked=0, Total=2070 [2022-11-26 00:41:18,913 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 1015 mSDsluCounter, 2725 mSDsCounter, 0 mSdLazyCounter, 3547 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 3065 SdHoareTripleChecker+Invalid, 3552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 3547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:18,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1015 Valid, 3065 Invalid, 3552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 3547 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-26 00:41:18,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12414 states. [2022-11-26 00:41:20,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12414 to 7800. [2022-11-26 00:41:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7800 states, 7799 states have (on average 1.4567252211822028) internal successors, (11361), 7799 states have internal predecessors, (11361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:20,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7800 states to 7800 states and 11361 transitions. [2022-11-26 00:41:20,877 INFO L78 Accepts]: Start accepts. Automaton has 7800 states and 11361 transitions. Word has length 71 [2022-11-26 00:41:20,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:20,878 INFO L495 AbstractCegarLoop]: Abstraction has 7800 states and 11361 transitions. [2022-11-26 00:41:20,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:20,878 INFO L276 IsEmpty]: Start isEmpty. Operand 7800 states and 11361 transitions. [2022-11-26 00:41:20,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-26 00:41:20,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:20,879 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] [2022-11-26 00:41:20,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-26 00:41:20,879 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:20,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:20,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1544397733, now seen corresponding path program 1 times [2022-11-26 00:41:20,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:20,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743527927] [2022-11-26 00:41:20,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:20,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:24,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:24,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743527927] [2022-11-26 00:41:24,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743527927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:41:24,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:41:24,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-11-26 00:41:24,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760822723] [2022-11-26 00:41:24,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:41:24,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-26 00:41:24,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:24,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-26 00:41:24,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:41:24,751 INFO L87 Difference]: Start difference. First operand 7800 states and 11361 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:32,801 INFO L93 Difference]: Finished difference Result 10140 states and 14689 transitions. [2022-11-26 00:41:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 00:41:32,802 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-26 00:41:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:32,812 INFO L225 Difference]: With dead ends: 10140 [2022-11-26 00:41:32,812 INFO L226 Difference]: Without dead ends: 10138 [2022-11-26 00:41:32,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=479, Invalid=2071, Unknown=0, NotChecked=0, Total=2550 [2022-11-26 00:41:32,816 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 885 mSDsluCounter, 3003 mSDsCounter, 0 mSdLazyCounter, 2354 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 3284 SdHoareTripleChecker+Invalid, 2361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:32,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [885 Valid, 3284 Invalid, 2361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2354 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-26 00:41:32,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10138 states. [2022-11-26 00:41:35,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10138 to 7794. [2022-11-26 00:41:35,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7794 states, 7793 states have (on average 1.4569485435647376) internal successors, (11354), 7793 states have internal predecessors, (11354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:35,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7794 states to 7794 states and 11354 transitions. [2022-11-26 00:41:35,201 INFO L78 Accepts]: Start accepts. Automaton has 7794 states and 11354 transitions. Word has length 72 [2022-11-26 00:41:35,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:35,201 INFO L495 AbstractCegarLoop]: Abstraction has 7794 states and 11354 transitions. [2022-11-26 00:41:35,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:35,201 INFO L276 IsEmpty]: Start isEmpty. Operand 7794 states and 11354 transitions. [2022-11-26 00:41:35,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-26 00:41:35,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:35,202 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] [2022-11-26 00:41:35,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-26 00:41:35,202 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:35,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:35,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1500824603, now seen corresponding path program 1 times [2022-11-26 00:41:35,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:35,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905187804] [2022-11-26 00:41:35,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:35,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:36,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:36,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905187804] [2022-11-26 00:41:36,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905187804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:41:36,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:41:36,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-26 00:41:36,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662645476] [2022-11-26 00:41:36,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:41:36,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:41:36,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:36,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:41:36,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:41:36,560 INFO L87 Difference]: Start difference. First operand 7794 states and 11354 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:41,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:41,070 INFO L93 Difference]: Finished difference Result 12112 states and 17558 transitions. [2022-11-26 00:41:41,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-26 00:41:41,070 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-26 00:41:41,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:41,084 INFO L225 Difference]: With dead ends: 12112 [2022-11-26 00:41:41,084 INFO L226 Difference]: Without dead ends: 12110 [2022-11-26 00:41:41,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2022-11-26 00:41:41,087 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 588 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:41,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 1470 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:41:41,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12110 states. [2022-11-26 00:41:43,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12110 to 7784. [2022-11-26 00:41:43,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7784 states, 7783 states have (on average 1.457278684311962) internal successors, (11342), 7783 states have internal predecessors, (11342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:43,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7784 states to 7784 states and 11342 transitions. [2022-11-26 00:41:43,624 INFO L78 Accepts]: Start accepts. Automaton has 7784 states and 11342 transitions. Word has length 72 [2022-11-26 00:41:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:43,625 INFO L495 AbstractCegarLoop]: Abstraction has 7784 states and 11342 transitions. [2022-11-26 00:41:43,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:43,625 INFO L276 IsEmpty]: Start isEmpty. Operand 7784 states and 11342 transitions. [2022-11-26 00:41:43,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-26 00:41:43,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:43,626 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] [2022-11-26 00:41:43,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-26 00:41:43,626 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:43,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:43,626 INFO L85 PathProgramCache]: Analyzing trace with hash 150136837, now seen corresponding path program 1 times [2022-11-26 00:41:43,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:43,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583641360] [2022-11-26 00:41:43,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:43,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:46,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:46,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583641360] [2022-11-26 00:41:46,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583641360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:41:46,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:41:46,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-11-26 00:41:46,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322594861] [2022-11-26 00:41:46,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:41:46,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-26 00:41:46,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:46,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-26 00:41:46,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:41:46,369 INFO L87 Difference]: Start difference. First operand 7784 states and 11342 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:53,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:53,750 INFO L93 Difference]: Finished difference Result 10187 states and 14791 transitions. [2022-11-26 00:41:53,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 00:41:53,750 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-26 00:41:53,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:53,760 INFO L225 Difference]: With dead ends: 10187 [2022-11-26 00:41:53,761 INFO L226 Difference]: Without dead ends: 9369 [2022-11-26 00:41:53,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=444, Invalid=1718, Unknown=0, NotChecked=0, Total=2162 [2022-11-26 00:41:53,764 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 980 mSDsluCounter, 3998 mSDsCounter, 0 mSdLazyCounter, 2357 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 4319 SdHoareTripleChecker+Invalid, 2363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:53,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 4319 Invalid, 2363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2357 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-26 00:41:53,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9369 states. [2022-11-26 00:41:55,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9369 to 7796. [2022-11-26 00:41:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7796 states, 7795 states have (on average 1.4568313021167416) internal successors, (11356), 7795 states have internal predecessors, (11356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:55,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7796 states to 7796 states and 11356 transitions. [2022-11-26 00:41:55,888 INFO L78 Accepts]: Start accepts. Automaton has 7796 states and 11356 transitions. Word has length 72 [2022-11-26 00:41:55,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:55,888 INFO L495 AbstractCegarLoop]: Abstraction has 7796 states and 11356 transitions. [2022-11-26 00:41:55,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:55,888 INFO L276 IsEmpty]: Start isEmpty. Operand 7796 states and 11356 transitions. [2022-11-26 00:41:55,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-26 00:41:55,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:55,889 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] [2022-11-26 00:41:55,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-26 00:41:55,889 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:55,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:55,890 INFO L85 PathProgramCache]: Analyzing trace with hash -799486011, now seen corresponding path program 1 times [2022-11-26 00:41:55,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:55,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031147970] [2022-11-26 00:41:55,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:55,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:57,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:57,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031147970] [2022-11-26 00:41:57,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031147970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:41:57,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:41:57,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-26 00:41:57,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582442302] [2022-11-26 00:41:57,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:41:57,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:41:57,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:57,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:41:57,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:41:57,200 INFO L87 Difference]: Start difference. First operand 7796 states and 11356 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:01,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:42:01,758 INFO L93 Difference]: Finished difference Result 10147 states and 14696 transitions. [2022-11-26 00:42:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-26 00:42:01,758 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-26 00:42:01,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:42:01,769 INFO L225 Difference]: With dead ends: 10147 [2022-11-26 00:42:01,769 INFO L226 Difference]: Without dead ends: 10145 [2022-11-26 00:42:01,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2022-11-26 00:42:01,772 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 618 mSDsluCounter, 2883 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 3256 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:42:01,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 3256 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:42:01,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10145 states. [2022-11-26 00:42:04,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10145 to 8220. [2022-11-26 00:42:04,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8220 states, 8219 states have (on average 1.4539481688769924) internal successors, (11950), 8219 states have internal predecessors, (11950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8220 states to 8220 states and 11950 transitions. [2022-11-26 00:42:04,173 INFO L78 Accepts]: Start accepts. Automaton has 8220 states and 11950 transitions. Word has length 72 [2022-11-26 00:42:04,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:42:04,174 INFO L495 AbstractCegarLoop]: Abstraction has 8220 states and 11950 transitions. [2022-11-26 00:42:04,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:04,174 INFO L276 IsEmpty]: Start isEmpty. Operand 8220 states and 11950 transitions. [2022-11-26 00:42:04,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 00:42:04,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:42:04,175 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] [2022-11-26 00:42:04,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-26 00:42:04,175 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:42:04,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:42:04,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1385174577, now seen corresponding path program 1 times [2022-11-26 00:42:04,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:42:04,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640642556] [2022-11-26 00:42:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:42:04,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:42:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:42:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:42:06,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:42:06,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640642556] [2022-11-26 00:42:06,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640642556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:42:06,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:42:06,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-11-26 00:42:06,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793420094] [2022-11-26 00:42:06,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:42:06,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-26 00:42:06,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:42:06,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-26 00:42:06,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:42:06,709 INFO L87 Difference]: Start difference. First operand 8220 states and 11950 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:14,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:42:14,324 INFO L93 Difference]: Finished difference Result 10609 states and 15383 transitions. [2022-11-26 00:42:14,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-26 00:42:14,325 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2022-11-26 00:42:14,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:42:14,335 INFO L225 Difference]: With dead ends: 10609 [2022-11-26 00:42:14,335 INFO L226 Difference]: Without dead ends: 9791 [2022-11-26 00:42:14,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=475, Invalid=2075, Unknown=0, NotChecked=0, Total=2550 [2022-11-26 00:42:14,339 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 968 mSDsluCounter, 2835 mSDsCounter, 0 mSdLazyCounter, 4075 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 3041 SdHoareTripleChecker+Invalid, 4081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:42:14,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [968 Valid, 3041 Invalid, 4081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4075 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-26 00:42:14,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9791 states. [2022-11-26 00:42:16,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9791 to 8214. [2022-11-26 00:42:16,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8214 states, 8213 states have (on average 1.454158042128333) internal successors, (11943), 8213 states have internal predecessors, (11943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:16,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8214 states to 8214 states and 11943 transitions. [2022-11-26 00:42:16,968 INFO L78 Accepts]: Start accepts. Automaton has 8214 states and 11943 transitions. Word has length 73 [2022-11-26 00:42:16,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:42:16,969 INFO L495 AbstractCegarLoop]: Abstraction has 8214 states and 11943 transitions. [2022-11-26 00:42:16,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:16,969 INFO L276 IsEmpty]: Start isEmpty. Operand 8214 states and 11943 transitions. [2022-11-26 00:42:16,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 00:42:16,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:42:16,971 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] [2022-11-26 00:42:16,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-26 00:42:16,971 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:42:16,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:42:16,971 INFO L85 PathProgramCache]: Analyzing trace with hash 435551729, now seen corresponding path program 1 times [2022-11-26 00:42:16,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:42:16,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052175802] [2022-11-26 00:42:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:42:16,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:42:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:42:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:42:20,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:42:20,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052175802] [2022-11-26 00:42:20,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052175802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:42:20,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:42:20,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-26 00:42:20,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062409564] [2022-11-26 00:42:20,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:42:20,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-26 00:42:20,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:42:20,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-26 00:42:20,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:42:20,272 INFO L87 Difference]: Start difference. First operand 8214 states and 11943 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:29,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:42:29,317 INFO L93 Difference]: Finished difference Result 10609 states and 15358 transitions. [2022-11-26 00:42:29,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-26 00:42:29,317 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2022-11-26 00:42:29,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:42:29,327 INFO L225 Difference]: With dead ends: 10609 [2022-11-26 00:42:29,327 INFO L226 Difference]: Without dead ends: 10607 [2022-11-26 00:42:29,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=555, Invalid=2201, Unknown=0, NotChecked=0, Total=2756 [2022-11-26 00:42:29,330 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 1049 mSDsluCounter, 2302 mSDsCounter, 0 mSdLazyCounter, 3581 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1049 SdHoareTripleChecker+Valid, 2546 SdHoareTripleChecker+Invalid, 3588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 3581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:42:29,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1049 Valid, 2546 Invalid, 3588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 3581 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-26 00:42:29,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10607 states. [2022-11-26 00:42:31,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10607 to 8214. [2022-11-26 00:42:31,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8214 states, 8213 states have (on average 1.454158042128333) internal successors, (11943), 8213 states have internal predecessors, (11943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:31,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8214 states to 8214 states and 11943 transitions. [2022-11-26 00:42:31,855 INFO L78 Accepts]: Start accepts. Automaton has 8214 states and 11943 transitions. Word has length 73 [2022-11-26 00:42:31,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:42:31,855 INFO L495 AbstractCegarLoop]: Abstraction has 8214 states and 11943 transitions. [2022-11-26 00:42:31,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:31,855 INFO L276 IsEmpty]: Start isEmpty. Operand 8214 states and 11943 transitions. [2022-11-26 00:42:31,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 00:42:31,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:42:31,856 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] [2022-11-26 00:42:31,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-26 00:42:31,857 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:42:31,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:42:31,857 INFO L85 PathProgramCache]: Analyzing trace with hash -468271503, now seen corresponding path program 1 times [2022-11-26 00:42:31,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:42:31,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786550305] [2022-11-26 00:42:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:42:31,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:42:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:42:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:42:33,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:42:33,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786550305] [2022-11-26 00:42:33,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786550305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:42:33,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:42:33,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-26 00:42:33,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562706539] [2022-11-26 00:42:33,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:42:33,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 00:42:33,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:42:33,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 00:42:33,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-11-26 00:42:33,969 INFO L87 Difference]: Start difference. First operand 8214 states and 11943 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:41,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:42:41,052 INFO L93 Difference]: Finished difference Result 11698 states and 16991 transitions. [2022-11-26 00:42:41,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-26 00:42:41,053 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2022-11-26 00:42:41,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:42:41,066 INFO L225 Difference]: With dead ends: 11698 [2022-11-26 00:42:41,066 INFO L226 Difference]: Without dead ends: 11696 [2022-11-26 00:42:41,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2022-11-26 00:42:41,070 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 864 mSDsluCounter, 2633 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 2981 SdHoareTripleChecker+Invalid, 1571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:42:41,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [864 Valid, 2981 Invalid, 1571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1565 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-26 00:42:41,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11696 states. [2022-11-26 00:42:43,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11696 to 8204. [2022-11-26 00:42:43,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8204 states, 8203 states have (on average 1.4547116908448128) internal successors, (11933), 8203 states have internal predecessors, (11933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8204 states to 8204 states and 11933 transitions. [2022-11-26 00:42:43,859 INFO L78 Accepts]: Start accepts. Automaton has 8204 states and 11933 transitions. Word has length 73 [2022-11-26 00:42:43,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:42:43,859 INFO L495 AbstractCegarLoop]: Abstraction has 8204 states and 11933 transitions. [2022-11-26 00:42:43,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:43,859 INFO L276 IsEmpty]: Start isEmpty. Operand 8204 states and 11933 transitions. [2022-11-26 00:42:43,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 00:42:43,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:42:43,861 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] [2022-11-26 00:42:43,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-26 00:42:43,861 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:42:43,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:42:43,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1617945039, now seen corresponding path program 1 times [2022-11-26 00:42:43,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:42:43,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209411106] [2022-11-26 00:42:43,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:42:43,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:42:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:42:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:42:46,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:42:46,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209411106] [2022-11-26 00:42:46,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209411106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:42:46,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:42:46,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-11-26 00:42:46,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182521891] [2022-11-26 00:42:46,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:42:46,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-26 00:42:46,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:42:46,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-26 00:42:46,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:42:46,347 INFO L87 Difference]: Start difference. First operand 8204 states and 11933 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:56,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:42:56,066 INFO L93 Difference]: Finished difference Result 13678 states and 19829 transitions. [2022-11-26 00:42:56,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 00:42:56,067 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2022-11-26 00:42:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:42:56,083 INFO L225 Difference]: With dead ends: 13678 [2022-11-26 00:42:56,084 INFO L226 Difference]: Without dead ends: 13676 [2022-11-26 00:42:56,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=447, Invalid=1905, Unknown=0, NotChecked=0, Total=2352 [2022-11-26 00:42:56,088 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 1000 mSDsluCounter, 3354 mSDsCounter, 0 mSdLazyCounter, 2454 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 3692 SdHoareTripleChecker+Invalid, 2464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:42:56,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1000 Valid, 3692 Invalid, 2464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2454 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-26 00:42:56,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13676 states. [2022-11-26 00:42:58,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13676 to 8204. [2022-11-26 00:42:58,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8204 states, 8203 states have (on average 1.4547116908448128) internal successors, (11933), 8203 states have internal predecessors, (11933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:58,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8204 states to 8204 states and 11933 transitions. [2022-11-26 00:42:58,823 INFO L78 Accepts]: Start accepts. Automaton has 8204 states and 11933 transitions. Word has length 73 [2022-11-26 00:42:58,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:42:58,823 INFO L495 AbstractCegarLoop]: Abstraction has 8204 states and 11933 transitions. [2022-11-26 00:42:58,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:58,824 INFO L276 IsEmpty]: Start isEmpty. Operand 8204 states and 11933 transitions. [2022-11-26 00:42:58,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 00:42:58,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:42:58,824 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] [2022-11-26 00:42:58,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-26 00:42:58,825 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:42:58,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:42:58,825 INFO L85 PathProgramCache]: Analyzing trace with hash 33016401, now seen corresponding path program 1 times [2022-11-26 00:42:58,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:42:58,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140597355] [2022-11-26 00:42:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:42:58,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:42:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:43:01,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:01,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140597355] [2022-11-26 00:43:01,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140597355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:43:01,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:43:01,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-11-26 00:43:01,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364712731] [2022-11-26 00:43:01,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:43:01,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-26 00:43:01,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:01,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-26 00:43:01,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:43:01,216 INFO L87 Difference]: Start difference. First operand 8204 states and 11933 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:10,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:10,744 INFO L93 Difference]: Finished difference Result 15651 states and 22756 transitions. [2022-11-26 00:43:10,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-26 00:43:10,744 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2022-11-26 00:43:10,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:10,761 INFO L225 Difference]: With dead ends: 15651 [2022-11-26 00:43:10,761 INFO L226 Difference]: Without dead ends: 14017 [2022-11-26 00:43:10,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=476, Invalid=2074, Unknown=0, NotChecked=0, Total=2550 [2022-11-26 00:43:10,766 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 1020 mSDsluCounter, 2766 mSDsCounter, 0 mSdLazyCounter, 4017 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 2974 SdHoareTripleChecker+Invalid, 4025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 4017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:10,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1020 Valid, 2974 Invalid, 4025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 4017 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-26 00:43:10,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14017 states. [2022-11-26 00:43:14,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14017 to 9558. [2022-11-26 00:43:14,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9558 states, 9557 states have (on average 1.4522339646332532) internal successors, (13879), 9557 states have internal predecessors, (13879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:14,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9558 states to 9558 states and 13879 transitions. [2022-11-26 00:43:14,139 INFO L78 Accepts]: Start accepts. Automaton has 9558 states and 13879 transitions. Word has length 73 [2022-11-26 00:43:14,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:14,140 INFO L495 AbstractCegarLoop]: Abstraction has 9558 states and 13879 transitions. [2022-11-26 00:43:14,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:14,140 INFO L276 IsEmpty]: Start isEmpty. Operand 9558 states and 13879 transitions. [2022-11-26 00:43:14,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-26 00:43:14,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:14,141 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] [2022-11-26 00:43:14,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-26 00:43:14,142 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:14,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:14,142 INFO L85 PathProgramCache]: Analyzing trace with hash -758992231, now seen corresponding path program 1 times [2022-11-26 00:43:14,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:14,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242712477] [2022-11-26 00:43:14,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:14,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:43:17,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:17,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242712477] [2022-11-26 00:43:17,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242712477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:43:17,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:43:17,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-11-26 00:43:17,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461211195] [2022-11-26 00:43:17,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:43:17,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-26 00:43:17,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:17,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-26 00:43:17,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-11-26 00:43:17,808 INFO L87 Difference]: Start difference. First operand 9558 states and 13879 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:29,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:29,109 INFO L93 Difference]: Finished difference Result 11140 states and 16106 transitions. [2022-11-26 00:43:29,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-26 00:43:29,109 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2022-11-26 00:43:29,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:29,121 INFO L225 Difference]: With dead ends: 11140 [2022-11-26 00:43:29,121 INFO L226 Difference]: Without dead ends: 11138 [2022-11-26 00:43:29,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=621, Invalid=2459, Unknown=0, NotChecked=0, Total=3080 [2022-11-26 00:43:29,123 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 999 mSDsluCounter, 3651 mSDsCounter, 0 mSdLazyCounter, 3393 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 4033 SdHoareTripleChecker+Invalid, 3399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 3393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:29,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [999 Valid, 4033 Invalid, 3399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 3393 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-26 00:43:29,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11138 states. [2022-11-26 00:43:32,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11138 to 9564. [2022-11-26 00:43:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9564 states, 9563 states have (on average 1.452054794520548) internal successors, (13886), 9563 states have internal predecessors, (13886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:32,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9564 states to 9564 states and 13886 transitions. [2022-11-26 00:43:32,531 INFO L78 Accepts]: Start accepts. Automaton has 9564 states and 13886 transitions. Word has length 74 [2022-11-26 00:43:32,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:32,531 INFO L495 AbstractCegarLoop]: Abstraction has 9564 states and 13886 transitions. [2022-11-26 00:43:32,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:32,531 INFO L276 IsEmpty]: Start isEmpty. Operand 9564 states and 13886 transitions. [2022-11-26 00:43:32,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-26 00:43:32,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:32,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:32,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-26 00:43:32,533 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:32,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:32,533 INFO L85 PathProgramCache]: Analyzing trace with hash 701302213, now seen corresponding path program 1 times [2022-11-26 00:43:32,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:32,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999944845] [2022-11-26 00:43:32,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:32,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:43:36,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:36,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999944845] [2022-11-26 00:43:36,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999944845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:43:36,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:43:36,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-11-26 00:43:36,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49950888] [2022-11-26 00:43:36,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:43:36,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-26 00:43:36,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:36,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-26 00:43:36,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-11-26 00:43:36,206 INFO L87 Difference]: Start difference. First operand 9564 states and 13886 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:47,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:47,840 INFO L93 Difference]: Finished difference Result 11151 states and 16118 transitions. [2022-11-26 00:43:47,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-26 00:43:47,841 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2022-11-26 00:43:47,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:47,853 INFO L225 Difference]: With dead ends: 11151 [2022-11-26 00:43:47,853 INFO L226 Difference]: Without dead ends: 11149 [2022-11-26 00:43:47,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=588, Invalid=2274, Unknown=0, NotChecked=0, Total=2862 [2022-11-26 00:43:47,856 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 931 mSDsluCounter, 2112 mSDsCounter, 0 mSdLazyCounter, 3457 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 2422 SdHoareTripleChecker+Invalid, 3466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 3457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:47,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [931 Valid, 2422 Invalid, 3466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 3457 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-26 00:43:47,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11149 states. [2022-11-26 00:43:51,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11149 to 9558. [2022-11-26 00:43:51,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9558 states, 9557 states have (on average 1.4522339646332532) internal successors, (13879), 9557 states have internal predecessors, (13879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:51,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9558 states to 9558 states and 13879 transitions. [2022-11-26 00:43:51,276 INFO L78 Accepts]: Start accepts. Automaton has 9558 states and 13879 transitions. Word has length 75 [2022-11-26 00:43:51,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:51,276 INFO L495 AbstractCegarLoop]: Abstraction has 9558 states and 13879 transitions. [2022-11-26 00:43:51,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:51,276 INFO L276 IsEmpty]: Start isEmpty. Operand 9558 states and 13879 transitions. [2022-11-26 00:43:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-26 00:43:51,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:51,278 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] [2022-11-26 00:43:51,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-26 00:43:51,278 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:51,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:51,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1951047173, now seen corresponding path program 1 times [2022-11-26 00:43:51,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:51,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658319235] [2022-11-26 00:43:51,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:51,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:43:55,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:55,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658319235] [2022-11-26 00:43:55,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658319235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:43:55,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:43:55,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-11-26 00:43:55,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967148181] [2022-11-26 00:43:55,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:43:55,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-26 00:43:55,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:55,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-26 00:43:55,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 00:43:55,623 INFO L87 Difference]: Start difference. First operand 9558 states and 13879 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:07,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:07,533 INFO L93 Difference]: Finished difference Result 11107 states and 16071 transitions. [2022-11-26 00:44:07,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-26 00:44:07,534 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2022-11-26 00:44:07,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:07,544 INFO L225 Difference]: With dead ends: 11107 [2022-11-26 00:44:07,545 INFO L226 Difference]: Without dead ends: 11105 [2022-11-26 00:44:07,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=648, Invalid=2658, Unknown=0, NotChecked=0, Total=3306 [2022-11-26 00:44:07,548 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 1172 mSDsluCounter, 2907 mSDsCounter, 0 mSdLazyCounter, 3056 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 3213 SdHoareTripleChecker+Invalid, 3066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:07,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1172 Valid, 3213 Invalid, 3066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3056 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-26 00:44:07,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11105 states. [2022-11-26 00:44:11,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11105 to 9554. [2022-11-26 00:44:11,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9554 states, 9553 states have (on average 1.4523186433581075) internal successors, (13874), 9553 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:11,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9554 states to 9554 states and 13874 transitions. [2022-11-26 00:44:11,119 INFO L78 Accepts]: Start accepts. Automaton has 9554 states and 13874 transitions. Word has length 75 [2022-11-26 00:44:11,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:11,120 INFO L495 AbstractCegarLoop]: Abstraction has 9554 states and 13874 transitions. [2022-11-26 00:44:11,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:11,120 INFO L276 IsEmpty]: Start isEmpty. Operand 9554 states and 13874 transitions. [2022-11-26 00:44:11,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-26 00:44:11,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:11,121 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] [2022-11-26 00:44:11,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-26 00:44:11,121 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:11,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:11,121 INFO L85 PathProgramCache]: Analyzing trace with hash -692958683, now seen corresponding path program 1 times [2022-11-26 00:44:11,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:11,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385094497] [2022-11-26 00:44:11,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:11,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:15,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:15,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385094497] [2022-11-26 00:44:15,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385094497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:15,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:15,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-11-26 00:44:15,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323014276] [2022-11-26 00:44:15,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:15,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-26 00:44:15,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:15,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-26 00:44:15,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-11-26 00:44:15,513 INFO L87 Difference]: Start difference. First operand 9554 states and 13874 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:28,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:28,687 INFO L93 Difference]: Finished difference Result 12666 states and 18346 transitions. [2022-11-26 00:44:28,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-26 00:44:28,687 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2022-11-26 00:44:28,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:28,700 INFO L225 Difference]: With dead ends: 12666 [2022-11-26 00:44:28,700 INFO L226 Difference]: Without dead ends: 11848 [2022-11-26 00:44:28,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=589, Invalid=2491, Unknown=0, NotChecked=0, Total=3080 [2022-11-26 00:44:28,704 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 791 mSDsluCounter, 2092 mSDsCounter, 0 mSdLazyCounter, 3831 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 2279 SdHoareTripleChecker+Invalid, 3837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 3831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:28,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 2279 Invalid, 3837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 3831 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-26 00:44:28,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11848 states. [2022-11-26 00:44:32,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11848 to 9538. [2022-11-26 00:44:32,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9538 states, 9537 states have (on average 1.4529726329034287) internal successors, (13857), 9537 states have internal predecessors, (13857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:32,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9538 states to 9538 states and 13857 transitions. [2022-11-26 00:44:32,354 INFO L78 Accepts]: Start accepts. Automaton has 9538 states and 13857 transitions. Word has length 75 [2022-11-26 00:44:32,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:32,354 INFO L495 AbstractCegarLoop]: Abstraction has 9538 states and 13857 transitions. [2022-11-26 00:44:32,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:32,355 INFO L276 IsEmpty]: Start isEmpty. Operand 9538 states and 13857 transitions. [2022-11-26 00:44:32,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-26 00:44:32,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:32,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:32,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-26 00:44:32,356 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:32,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:32,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1642581531, now seen corresponding path program 1 times [2022-11-26 00:44:32,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:32,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311969091] [2022-11-26 00:44:32,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:32,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:32,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:37,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:37,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311969091] [2022-11-26 00:44:37,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311969091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:37,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:37,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-11-26 00:44:37,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225811775] [2022-11-26 00:44:37,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:37,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-26 00:44:37,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:37,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-26 00:44:37,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:44:37,788 INFO L87 Difference]: Start difference. First operand 9538 states and 13857 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:52,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:52,322 INFO L93 Difference]: Finished difference Result 11092 states and 16054 transitions. [2022-11-26 00:44:52,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-26 00:44:52,322 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2022-11-26 00:44:52,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:52,334 INFO L225 Difference]: With dead ends: 11092 [2022-11-26 00:44:52,334 INFO L226 Difference]: Without dead ends: 11090 [2022-11-26 00:44:52,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=681, Invalid=2979, Unknown=0, NotChecked=0, Total=3660 [2022-11-26 00:44:52,337 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 1120 mSDsluCounter, 2573 mSDsCounter, 0 mSdLazyCounter, 4662 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 2767 SdHoareTripleChecker+Invalid, 4668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:52,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1120 Valid, 2767 Invalid, 4668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4662 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-26 00:44:52,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11090 states. [2022-11-26 00:44:56,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11090 to 9538. [2022-11-26 00:44:56,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9538 states, 9537 states have (on average 1.4529726329034287) internal successors, (13857), 9537 states have internal predecessors, (13857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9538 states to 9538 states and 13857 transitions. [2022-11-26 00:44:56,025 INFO L78 Accepts]: Start accepts. Automaton has 9538 states and 13857 transitions. Word has length 75 [2022-11-26 00:44:56,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:56,026 INFO L495 AbstractCegarLoop]: Abstraction has 9538 states and 13857 transitions. [2022-11-26 00:44:56,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:56,026 INFO L276 IsEmpty]: Start isEmpty. Operand 9538 states and 13857 transitions. [2022-11-26 00:44:56,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-26 00:44:56,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:56,027 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:56,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-26 00:44:56,027 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:56,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:56,028 INFO L85 PathProgramCache]: Analyzing trace with hash 775031993, now seen corresponding path program 1 times [2022-11-26 00:44:56,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:56,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304688960] [2022-11-26 00:44:56,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:56,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:45:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:45:08,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:45:08,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304688960] [2022-11-26 00:45:08,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304688960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:45:08,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:45:08,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-11-26 00:45:08,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729107528] [2022-11-26 00:45:08,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:45:08,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-26 00:45:08,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:45:08,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-26 00:45:08,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1666, Unknown=0, NotChecked=0, Total=1806 [2022-11-26 00:45:08,688 INFO L87 Difference]: Start difference. First operand 9538 states and 13857 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:38,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:45:38,341 INFO L93 Difference]: Finished difference Result 11092 states and 16057 transitions. [2022-11-26 00:45:38,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-26 00:45:38,342 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-26 00:45:38,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:45:38,355 INFO L225 Difference]: With dead ends: 11092 [2022-11-26 00:45:38,355 INFO L226 Difference]: Without dead ends: 11090 [2022-11-26 00:45:38,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=1190, Invalid=4360, Unknown=0, NotChecked=0, Total=5550 [2022-11-26 00:45:38,359 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 946 mSDsluCounter, 3547 mSDsCounter, 0 mSdLazyCounter, 6006 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 3859 SdHoareTripleChecker+Invalid, 6007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:45:38,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [946 Valid, 3859 Invalid, 6007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6006 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-11-26 00:45:38,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11090 states. [2022-11-26 00:45:42,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11090 to 9514. [2022-11-26 00:45:42,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9514 states, 9513 states have (on average 1.4539051823820035) internal successors, (13831), 9513 states have internal predecessors, (13831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:42,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9514 states to 9514 states and 13831 transitions. [2022-11-26 00:45:42,103 INFO L78 Accepts]: Start accepts. Automaton has 9514 states and 13831 transitions. Word has length 77 [2022-11-26 00:45:42,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:45:42,103 INFO L495 AbstractCegarLoop]: Abstraction has 9514 states and 13831 transitions. [2022-11-26 00:45:42,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:42,104 INFO L276 IsEmpty]: Start isEmpty. Operand 9514 states and 13831 transitions. [2022-11-26 00:45:42,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-26 00:45:42,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:45:42,105 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:45:42,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-26 00:45:42,106 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:45:42,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:45:42,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1714814612, now seen corresponding path program 1 times [2022-11-26 00:45:42,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:45:42,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662642692] [2022-11-26 00:45:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:45:42,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:45:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:45:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:45:42,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:45:42,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662642692] [2022-11-26 00:45:42,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662642692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:45:42,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:45:42,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:45:42,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187034516] [2022-11-26 00:45:42,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:45:42,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:45:42,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:45:42,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:45:42,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:45:42,183 INFO L87 Difference]: Start difference. First operand 9514 states and 13831 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:46,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:45:46,952 INFO L93 Difference]: Finished difference Result 16504 states and 24183 transitions. [2022-11-26 00:45:46,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:45:46,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2022-11-26 00:45:46,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:45:46,970 INFO L225 Difference]: With dead ends: 16504 [2022-11-26 00:45:46,970 INFO L226 Difference]: Without dead ends: 13094 [2022-11-26 00:45:46,974 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 [2022-11-26 00:45:46,974 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 89 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:45:46,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 390 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:45:46,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13094 states. [2022-11-26 00:45:51,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13094 to 12522. [2022-11-26 00:45:51,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12522 states, 12521 states have (on average 1.45156137688683) internal successors, (18175), 12521 states have internal predecessors, (18175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:51,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12522 states to 12522 states and 18175 transitions. [2022-11-26 00:45:51,626 INFO L78 Accepts]: Start accepts. Automaton has 12522 states and 18175 transitions. Word has length 79 [2022-11-26 00:45:51,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:45:51,626 INFO L495 AbstractCegarLoop]: Abstraction has 12522 states and 18175 transitions. [2022-11-26 00:45:51,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:51,626 INFO L276 IsEmpty]: Start isEmpty. Operand 12522 states and 18175 transitions. [2022-11-26 00:45:51,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-26 00:45:51,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:45:51,629 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:45:51,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-11-26 00:45:51,629 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:45:51,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:45:51,630 INFO L85 PathProgramCache]: Analyzing trace with hash -843083517, now seen corresponding path program 1 times [2022-11-26 00:45:51,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:45:51,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286995841] [2022-11-26 00:45:51,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:45:51,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:45:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:45:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:45:51,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:45:51,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286995841] [2022-11-26 00:45:51,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286995841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:45:51,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:45:51,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:45:51,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423980142] [2022-11-26 00:45:51,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:45:51,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:45:51,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:45:51,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:45:51,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:45:51,735 INFO L87 Difference]: Start difference. First operand 12522 states and 18175 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:57,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:45:57,560 INFO L93 Difference]: Finished difference Result 22504 states and 32887 transitions. [2022-11-26 00:45:57,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:45:57,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-11-26 00:45:57,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:45:57,579 INFO L225 Difference]: With dead ends: 22504 [2022-11-26 00:45:57,580 INFO L226 Difference]: Without dead ends: 16166 [2022-11-26 00:45:57,585 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 [2022-11-26 00:45:57,585 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 85 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:45:57,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 372 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:45:57,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16166 states. [2022-11-26 00:46:03,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16166 to 15202. [2022-11-26 00:46:03,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15202 states, 15201 states have (on average 1.4496414709558583) internal successors, (22036), 15201 states have internal predecessors, (22036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:46:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15202 states to 15202 states and 22036 transitions. [2022-11-26 00:46:03,064 INFO L78 Accepts]: Start accepts. Automaton has 15202 states and 22036 transitions. Word has length 81 [2022-11-26 00:46:03,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:46:03,065 INFO L495 AbstractCegarLoop]: Abstraction has 15202 states and 22036 transitions. [2022-11-26 00:46:03,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:46:03,065 INFO L276 IsEmpty]: Start isEmpty. Operand 15202 states and 22036 transitions. [2022-11-26 00:46:03,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-26 00:46:03,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:46:03,066 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:46:03,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-26 00:46:03,066 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:46:03,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:46:03,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1436204847, now seen corresponding path program 1 times [2022-11-26 00:46:03,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:46:03,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076665492] [2022-11-26 00:46:03,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:03,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:46:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:46:03,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:46:03,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076665492] [2022-11-26 00:46:03,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076665492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:46:03,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:46:03,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:46:03,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197053608] [2022-11-26 00:46:03,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:46:03,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:46:03,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:46:03,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:46:03,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:46:03,137 INFO L87 Difference]: Start difference. First operand 15202 states and 22036 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:46:10,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:46:10,376 INFO L93 Difference]: Finished difference Result 29340 states and 42770 transitions. [2022-11-26 00:46:10,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:46:10,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-26 00:46:10,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:46:10,404 INFO L225 Difference]: With dead ends: 29340 [2022-11-26 00:46:10,404 INFO L226 Difference]: Without dead ends: 20442 [2022-11-26 00:46:10,412 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 [2022-11-26 00:46:10,412 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 80 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:46:10,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 353 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:46:10,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20442 states. [2022-11-26 00:46:17,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20442 to 19056. [2022-11-26 00:46:17,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19056 states, 19055 states have (on average 1.4449750721595382) internal successors, (27534), 19055 states have internal predecessors, (27534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:46:17,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19056 states to 19056 states and 27534 transitions. [2022-11-26 00:46:17,570 INFO L78 Accepts]: Start accepts. Automaton has 19056 states and 27534 transitions. Word has length 84 [2022-11-26 00:46:17,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:46:17,570 INFO L495 AbstractCegarLoop]: Abstraction has 19056 states and 27534 transitions. [2022-11-26 00:46:17,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:46:17,570 INFO L276 IsEmpty]: Start isEmpty. Operand 19056 states and 27534 transitions. [2022-11-26 00:46:17,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-26 00:46:17,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:46:17,573 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:46:17,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-11-26 00:46:17,573 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:46:17,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:46:17,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1739150269, now seen corresponding path program 1 times [2022-11-26 00:46:17,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:46:17,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752003597] [2022-11-26 00:46:17,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:17,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:46:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:46:17,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:46:17,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752003597] [2022-11-26 00:46:17,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752003597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:46:17,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:46:17,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:46:17,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544083988] [2022-11-26 00:46:17,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:46:17,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:46:17,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:46:17,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:46:17,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:46:17,617 INFO L87 Difference]: Start difference. First operand 19056 states and 27534 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:46:28,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:46:28,811 INFO L93 Difference]: Finished difference Result 36436 states and 52474 transitions. [2022-11-26 00:46:28,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:46:28,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2022-11-26 00:46:28,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:46:28,849 INFO L225 Difference]: With dead ends: 36436 [2022-11-26 00:46:28,849 INFO L226 Difference]: Without dead ends: 27794 [2022-11-26 00:46:28,859 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 [2022-11-26 00:46:28,860 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 80 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:46:28,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 359 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:46:28,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27794 states. [2022-11-26 00:46:40,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27794 to 27792. [2022-11-26 00:46:40,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27792 states, 27791 states have (on average 1.4334136950811414) internal successors, (39836), 27791 states have internal predecessors, (39836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:46:40,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27792 states to 27792 states and 39836 transitions. [2022-11-26 00:46:40,148 INFO L78 Accepts]: Start accepts. Automaton has 27792 states and 39836 transitions. Word has length 87 [2022-11-26 00:46:40,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:46:40,148 INFO L495 AbstractCegarLoop]: Abstraction has 27792 states and 39836 transitions. [2022-11-26 00:46:40,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:46:40,148 INFO L276 IsEmpty]: Start isEmpty. Operand 27792 states and 39836 transitions. [2022-11-26 00:46:40,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-26 00:46:40,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:46:40,151 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:46:40,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-26 00:46:40,151 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:46:40,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:46:40,152 INFO L85 PathProgramCache]: Analyzing trace with hash 405517443, now seen corresponding path program 1 times [2022-11-26 00:46:40,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:46:40,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840231985] [2022-11-26 00:46:40,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:40,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:46:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:46:40,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:46:40,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840231985] [2022-11-26 00:46:40,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840231985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:46:40,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:46:40,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:46:40,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17755953] [2022-11-26 00:46:40,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:46:40,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:46:40,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:46:40,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:46:40,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:46:40,220 INFO L87 Difference]: Start difference. First operand 27792 states and 39836 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:46:55,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:46:55,147 INFO L93 Difference]: Finished difference Result 56766 states and 81722 transitions. [2022-11-26 00:46:55,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:46:55,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2022-11-26 00:46:55,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:46:55,207 INFO L225 Difference]: With dead ends: 56766 [2022-11-26 00:46:55,207 INFO L226 Difference]: Without dead ends: 38516 [2022-11-26 00:46:55,222 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 [2022-11-26 00:46:55,222 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 75 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:46:55,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 334 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:46:55,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38516 states. [2022-11-26 00:47:10,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38516 to 35696. [2022-11-26 00:47:10,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35696 states, 35695 states have (on average 1.4254657515058131) internal successors, (50882), 35695 states have internal predecessors, (50882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:47:10,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35696 states to 35696 states and 50882 transitions. [2022-11-26 00:47:10,280 INFO L78 Accepts]: Start accepts. Automaton has 35696 states and 50882 transitions. Word has length 87 [2022-11-26 00:47:10,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:10,280 INFO L495 AbstractCegarLoop]: Abstraction has 35696 states and 50882 transitions. [2022-11-26 00:47:10,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:47:10,281 INFO L276 IsEmpty]: Start isEmpty. Operand 35696 states and 50882 transitions. [2022-11-26 00:47:10,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-26 00:47:10,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:10,283 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:47:10,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-26 00:47:10,283 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:47:10,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:10,284 INFO L85 PathProgramCache]: Analyzing trace with hash 56201339, now seen corresponding path program 1 times [2022-11-26 00:47:10,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:47:10,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298115448] [2022-11-26 00:47:10,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:10,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:47:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:47:10,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:47:10,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298115448] [2022-11-26 00:47:10,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298115448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:47:10,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:47:10,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:47:10,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510502464] [2022-11-26 00:47:10,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:47:10,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:47:10,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:47:10,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:47:10,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:47:10,356 INFO L87 Difference]: Start difference. First operand 35696 states and 50882 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:47:30,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:30,521 INFO L93 Difference]: Finished difference Result 80666 states and 115286 transitions. [2022-11-26 00:47:30,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:47:30,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2022-11-26 00:47:30,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:30,611 INFO L225 Difference]: With dead ends: 80666 [2022-11-26 00:47:30,611 INFO L226 Difference]: Without dead ends: 51688 [2022-11-26 00:47:30,637 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 [2022-11-26 00:47:30,637 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 72 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:30,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 335 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:47:30,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51688 states.