./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.BOUNDED-10.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf9320f-6408-467c-93af-dbfe600053b6/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf9320f-6408-467c-93af-dbfe600053b6/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf9320f-6408-467c-93af-dbfe600053b6/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf9320f-6408-467c-93af-dbfe600053b6/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf9320f-6408-467c-93af-dbfe600053b6/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf9320f-6408-467c-93af-dbfe600053b6/bin/utaipan-g80aRyZoba --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 169d16a82e2efb21b41720aab8fadcf5ecf67324651e69e91d6cb4f921e3dcd4 --- 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-b5237d8 [2022-11-22 02:23:31,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:23:31,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:23:31,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:23:31,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:23:31,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:23:31,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:23:31,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:23:31,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:23:31,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:23:31,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:23:31,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:23:31,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:23:31,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:23:31,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:23:31,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:23:31,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:23:31,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:23:31,653 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:23:31,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:23:31,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:23:31,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:23:31,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:23:31,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:23:31,666 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:23:31,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:23:31,667 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:23:31,668 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:23:31,668 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:23:31,669 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:23:31,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:23:31,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:23:31,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:23:31,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:23:31,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:23:31,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:23:31,682 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:23:31,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:23:31,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:23:31,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:23:31,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:23:31,685 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf9320f-6408-467c-93af-dbfe600053b6/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:23:31,734 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:23:31,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:23:31,734 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:23:31,735 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:23:31,735 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:23:31,735 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:23:31,736 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:23:31,736 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:23:31,736 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:23:31,736 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:23:31,736 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:23:31,737 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:23:31,737 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:23:31,737 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:23:31,737 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:23:31,738 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:23:31,738 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:23:31,738 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:23:31,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:23:31,739 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:23:31,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:23:31,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:23:31,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:23:31,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:23:31,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:23:31,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:23:31,740 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:23:31,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:23:31,741 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:23:31,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:23:31,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:23:31,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:23:31,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:23:31,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:23:31,746 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:23:31,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:23:31,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:23:31,748 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:23:31,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:23:31,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:23:31,748 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:23:31,749 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_bbf9320f-6408-467c-93af-dbfe600053b6/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf9320f-6408-467c-93af-dbfe600053b6/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 169d16a82e2efb21b41720aab8fadcf5ecf67324651e69e91d6cb4f921e3dcd4 [2022-11-22 02:23:32,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:23:32,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:23:32,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:23:32,060 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:23:32,061 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:23:32,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf9320f-6408-467c-93af-dbfe600053b6/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2022-11-22 02:23:35,148 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:23:35,442 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:23:35,443 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf9320f-6408-467c-93af-dbfe600053b6/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2022-11-22 02:23:35,470 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf9320f-6408-467c-93af-dbfe600053b6/bin/utaipan-g80aRyZoba/data/1aae02561/b8f943753b8f45ad9a453945d5c5a931/FLAGb520f13e7 [2022-11-22 02:23:35,488 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf9320f-6408-467c-93af-dbfe600053b6/bin/utaipan-g80aRyZoba/data/1aae02561/b8f943753b8f45ad9a453945d5c5a931 [2022-11-22 02:23:35,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:23:35,493 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:23:35,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:23:35,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:23:35,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:23:35,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:23:35" (1/1) ... [2022-11-22 02:23:35,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f13382a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:35, skipping insertion in model container [2022-11-22 02:23:35,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:23:35" (1/1) ... [2022-11-22 02:23:35,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:23:35,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:23:35,901 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_bbf9320f-6408-467c-93af-dbfe600053b6/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[13215,13228] [2022-11-22 02:23:35,998 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:23:36,014 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:23:36,124 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_bbf9320f-6408-467c-93af-dbfe600053b6/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[13215,13228] [2022-11-22 02:23:36,277 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:23:36,294 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:23:36,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:36 WrapperNode [2022-11-22 02:23:36,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:23:36,296 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:23:36,296 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:23:36,296 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:23:36,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:36" (1/1) ... [2022-11-22 02:23:36,339 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:36" (1/1) ... [2022-11-22 02:23:36,433 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1333 [2022-11-22 02:23:36,433 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:23:36,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:23:36,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:23:36,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:23:36,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:36" (1/1) ... [2022-11-22 02:23:36,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:36" (1/1) ... [2022-11-22 02:23:36,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:36" (1/1) ... [2022-11-22 02:23:36,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:36" (1/1) ... [2022-11-22 02:23:36,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:36" (1/1) ... [2022-11-22 02:23:36,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:36" (1/1) ... [2022-11-22 02:23:36,476 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:36" (1/1) ... [2022-11-22 02:23:36,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:36" (1/1) ... [2022-11-22 02:23:36,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:23:36,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:23:36,487 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:23:36,487 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:23:36,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:36" (1/1) ... [2022-11-22 02:23:36,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:23:36,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf9320f-6408-467c-93af-dbfe600053b6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:36,532 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf9320f-6408-467c-93af-dbfe600053b6/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:23:36,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf9320f-6408-467c-93af-dbfe600053b6/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:23:36,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:23:36,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:23:36,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:23:36,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:23:36,828 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:23:36,830 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:23:37,903 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:23:38,610 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:23:38,611 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 02:23:38,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:23:38 BoogieIcfgContainer [2022-11-22 02:23:38,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:23:38,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:23:38,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:23:38,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:23:38,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:23:35" (1/3) ... [2022-11-22 02:23:38,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f34d21c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:23:38, skipping insertion in model container [2022-11-22 02:23:38,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:36" (2/3) ... [2022-11-22 02:23:38,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f34d21c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:23:38, skipping insertion in model container [2022-11-22 02:23:38,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:23:38" (3/3) ... [2022-11-22 02:23:38,627 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2022-11-22 02:23:38,647 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:23:38,647 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:23:38,732 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:23:38,741 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;@6cd9fedd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:23:38,742 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:23:38,749 INFO L276 IsEmpty]: Start isEmpty. Operand has 255 states, 253 states have (on average 1.5454545454545454) internal successors, (391), 254 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:23:38,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 02:23:38,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:38,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:23:38,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:23:38,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:38,780 INFO L85 PathProgramCache]: Analyzing trace with hash 2082156528, now seen corresponding path program 1 times [2022-11-22 02:23:38,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:38,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427173384] [2022-11-22 02:23:38,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:38,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:40,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:40,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427173384] [2022-11-22 02:23:40,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427173384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:40,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:23:40,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:23:40,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933619752] [2022-11-22 02:23:40,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:40,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:23:40,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:40,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:23:40,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:23:40,155 INFO L87 Difference]: Start difference. First operand has 255 states, 253 states have (on average 1.5454545454545454) internal successors, (391), 254 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:23:40,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:40,525 INFO L93 Difference]: Finished difference Result 673 states and 1028 transitions. [2022-11-22 02:23:40,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:23:40,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-22 02:23:40,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:40,550 INFO L225 Difference]: With dead ends: 673 [2022-11-22 02:23:40,551 INFO L226 Difference]: Without dead ends: 422 [2022-11-22 02:23:40,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:23:40,559 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 584 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:40,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 751 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:23:40,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-11-22 02:23:40,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 420. [2022-11-22 02:23:40,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.5083532219570406) internal successors, (632), 419 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:23:40,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 632 transitions. [2022-11-22 02:23:40,633 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 632 transitions. Word has length 52 [2022-11-22 02:23:40,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:40,634 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 632 transitions. [2022-11-22 02:23:40,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:23:40,634 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 632 transitions. [2022-11-22 02:23:40,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-22 02:23:40,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:40,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:23:40,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:23:40,638 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:23:40,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:40,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1223013843, now seen corresponding path program 1 times [2022-11-22 02:23:40,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:40,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183368768] [2022-11-22 02:23:40,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:40,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:41,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:41,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183368768] [2022-11-22 02:23:41,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183368768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:41,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:23:41,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:23:41,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197853158] [2022-11-22 02:23:41,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:41,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:23:41,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:41,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:23:41,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:23:41,410 INFO L87 Difference]: Start difference. First operand 420 states and 632 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:23:41,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:41,592 INFO L93 Difference]: Finished difference Result 1095 states and 1648 transitions. [2022-11-22 02:23:41,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:23:41,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2022-11-22 02:23:41,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:41,596 INFO L225 Difference]: With dead ends: 1095 [2022-11-22 02:23:41,596 INFO L226 Difference]: Without dead ends: 698 [2022-11-22 02:23:41,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:23:41,599 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 583 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:41,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 616 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:23:41,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-11-22 02:23:41,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 696. [2022-11-22 02:23:41,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 1.5007194244604316) internal successors, (1043), 695 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:23:41,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1043 transitions. [2022-11-22 02:23:41,661 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1043 transitions. Word has length 56 [2022-11-22 02:23:41,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:41,662 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 1043 transitions. [2022-11-22 02:23:41,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:23:41,663 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1043 transitions. [2022-11-22 02:23:41,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-22 02:23:41,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:41,666 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] [2022-11-22 02:23:41,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:23:41,666 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:23:41,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:41,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1094077442, now seen corresponding path program 1 times [2022-11-22 02:23:41,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:41,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932849170] [2022-11-22 02:23:41,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:41,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:42,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:42,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932849170] [2022-11-22 02:23:42,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932849170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:42,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:23:42,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:23:42,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053589335] [2022-11-22 02:23:42,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:42,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:23:42,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:42,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:23:42,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:23:42,628 INFO L87 Difference]: Start difference. First operand 696 states and 1043 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:23:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:42,883 INFO L93 Difference]: Finished difference Result 1814 states and 2715 transitions. [2022-11-22 02:23:42,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:23:42,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2022-11-22 02:23:42,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:42,890 INFO L225 Difference]: With dead ends: 1814 [2022-11-22 02:23:42,891 INFO L226 Difference]: Without dead ends: 1154 [2022-11-22 02:23:42,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:23:42,900 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 292 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:42,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 921 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:23:42,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-11-22 02:23:43,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1152. [2022-11-22 02:23:43,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 1.4891398783666376) internal successors, (1714), 1151 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:23:43,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1714 transitions. [2022-11-22 02:23:43,030 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1714 transitions. Word has length 62 [2022-11-22 02:23:43,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:43,030 INFO L495 AbstractCegarLoop]: Abstraction has 1152 states and 1714 transitions. [2022-11-22 02:23:43,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:23:43,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1714 transitions. [2022-11-22 02:23:43,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-22 02:23:43,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:43,037 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] [2022-11-22 02:23:43,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:23:43,038 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:23:43,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:43,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1817153353, now seen corresponding path program 1 times [2022-11-22 02:23:43,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:43,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461912091] [2022-11-22 02:23:43,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:43,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:44,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:44,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461912091] [2022-11-22 02:23:44,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461912091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:44,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:23:44,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:23:44,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619961407] [2022-11-22 02:23:44,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:44,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:23:44,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:44,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:23:44,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:23:44,046 INFO L87 Difference]: Start difference. First operand 1152 states and 1714 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 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) [2022-11-22 02:23:44,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:44,409 INFO L93 Difference]: Finished difference Result 2977 states and 4414 transitions. [2022-11-22 02:23:44,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:23:44,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 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 [2022-11-22 02:23:44,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:44,417 INFO L225 Difference]: With dead ends: 2977 [2022-11-22 02:23:44,417 INFO L226 Difference]: Without dead ends: 1874 [2022-11-22 02:23:44,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:23:44,429 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 567 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:44,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 650 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:23:44,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2022-11-22 02:23:44,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1872. [2022-11-22 02:23:44,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1871 states have (on average 1.4714056654195617) internal successors, (2753), 1871 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:23:44,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2753 transitions. [2022-11-22 02:23:44,687 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2753 transitions. Word has length 68 [2022-11-22 02:23:44,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:44,687 INFO L495 AbstractCegarLoop]: Abstraction has 1872 states and 2753 transitions. [2022-11-22 02:23:44,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 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) [2022-11-22 02:23:44,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2753 transitions. [2022-11-22 02:23:44,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-22 02:23:44,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:44,692 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] [2022-11-22 02:23:44,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:23:44,692 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:23:44,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:44,693 INFO L85 PathProgramCache]: Analyzing trace with hash 316619168, now seen corresponding path program 1 times [2022-11-22 02:23:44,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:44,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808220407] [2022-11-22 02:23:44,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:44,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:45,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:45,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808220407] [2022-11-22 02:23:45,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808220407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:45,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:23:45,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:23:45,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604440602] [2022-11-22 02:23:45,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:45,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:23:45,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:45,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:23:45,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:23:45,792 INFO L87 Difference]: Start difference. First operand 1872 states and 2753 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 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) [2022-11-22 02:23:46,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:46,401 INFO L93 Difference]: Finished difference Result 4740 states and 6921 transitions. [2022-11-22 02:23:46,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:23:46,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 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 [2022-11-22 02:23:46,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:46,412 INFO L225 Difference]: With dead ends: 4740 [2022-11-22 02:23:46,413 INFO L226 Difference]: Without dead ends: 2930 [2022-11-22 02:23:46,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:23:46,419 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 291 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:46,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 773 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:23:46,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2022-11-22 02:23:46,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 2928. [2022-11-22 02:23:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2927 states have (on average 1.4431158182439359) internal successors, (4224), 2927 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:23:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 4224 transitions. [2022-11-22 02:23:46,885 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 4224 transitions. Word has length 74 [2022-11-22 02:23:46,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:46,886 INFO L495 AbstractCegarLoop]: Abstraction has 2928 states and 4224 transitions. [2022-11-22 02:23:46,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 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) [2022-11-22 02:23:46,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 4224 transitions. [2022-11-22 02:23:46,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-22 02:23:46,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:46,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:23:46,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:23:46,898 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:23:46,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:46,899 INFO L85 PathProgramCache]: Analyzing trace with hash -683013599, now seen corresponding path program 1 times [2022-11-22 02:23:46,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:46,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110024403] [2022-11-22 02:23:46,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:46,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:47,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:47,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110024403] [2022-11-22 02:23:47,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110024403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:47,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:23:47,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:23:47,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268055553] [2022-11-22 02:23:47,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:47,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:23:47,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:47,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:23:47,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:23:47,335 INFO L87 Difference]: Start difference. First operand 2928 states and 4224 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:23:50,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:50,408 INFO L93 Difference]: Finished difference Result 14891 states and 21262 transitions. [2022-11-22 02:23:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:23:50,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-22 02:23:50,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:50,455 INFO L225 Difference]: With dead ends: 14891 [2022-11-22 02:23:50,455 INFO L226 Difference]: Without dead ends: 12019 [2022-11-22 02:23:50,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:23:50,462 INFO L413 NwaCegarLoop]: 667 mSDtfsCounter, 2207 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2207 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:50,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2207 Valid, 1773 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:23:50,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12019 states. [2022-11-22 02:23:52,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12019 to 12011. [2022-11-22 02:23:52,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12011 states, 12010 states have (on average 1.4208992506244795) internal successors, (17065), 12010 states have internal predecessors, (17065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:23:52,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12011 states to 12011 states and 17065 transitions. [2022-11-22 02:23:52,901 INFO L78 Accepts]: Start accepts. Automaton has 12011 states and 17065 transitions. Word has length 80 [2022-11-22 02:23:52,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:52,902 INFO L495 AbstractCegarLoop]: Abstraction has 12011 states and 17065 transitions. [2022-11-22 02:23:52,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:23:52,902 INFO L276 IsEmpty]: Start isEmpty. Operand 12011 states and 17065 transitions. [2022-11-22 02:23:52,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-22 02:23:52,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:52,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:23:52,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:23:52,925 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:23:52,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:52,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1092803663, now seen corresponding path program 1 times [2022-11-22 02:23:52,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:52,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186455674] [2022-11-22 02:23:52,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:52,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:53,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:53,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186455674] [2022-11-22 02:23:53,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186455674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:53,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:23:53,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:23:53,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538253840] [2022-11-22 02:23:53,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:53,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:23:53,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:53,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:23:53,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:23:53,494 INFO L87 Difference]: Start difference. First operand 12011 states and 17065 transitions. Second operand has 4 states, 4 states have (on average 21.0) 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) [2022-11-22 02:23:56,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:56,998 INFO L93 Difference]: Finished difference Result 29215 states and 41661 transitions. [2022-11-22 02:23:57,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:23:57,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) 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 [2022-11-22 02:23:57,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:57,055 INFO L225 Difference]: With dead ends: 29215 [2022-11-22 02:23:57,055 INFO L226 Difference]: Without dead ends: 17229 [2022-11-22 02:23:57,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:23:57,075 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 363 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:57,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 665 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:23:57,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17229 states. [2022-11-22 02:23:59,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17229 to 17227. [2022-11-22 02:23:59,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17227 states, 17226 states have (on average 1.4140253105770346) internal successors, (24358), 17226 states have internal predecessors, (24358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:23:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17227 states to 17227 states and 24358 transitions. [2022-11-22 02:23:59,438 INFO L78 Accepts]: Start accepts. Automaton has 17227 states and 24358 transitions. Word has length 84 [2022-11-22 02:23:59,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:59,439 INFO L495 AbstractCegarLoop]: Abstraction has 17227 states and 24358 transitions. [2022-11-22 02:23:59,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) 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) [2022-11-22 02:23:59,439 INFO L276 IsEmpty]: Start isEmpty. Operand 17227 states and 24358 transitions. [2022-11-22 02:23:59,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-22 02:23:59,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:59,471 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:23:59,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 02:23:59,472 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:23:59,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:59,472 INFO L85 PathProgramCache]: Analyzing trace with hash -842864758, now seen corresponding path program 1 times [2022-11-22 02:23:59,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:59,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110340025] [2022-11-22 02:23:59,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:59,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:24:00,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:24:00,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110340025] [2022-11-22 02:24:00,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110340025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:24:00,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:24:00,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:24:00,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347717860] [2022-11-22 02:24:00,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:24:00,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:24:00,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:24:00,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:24:00,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:24:00,295 INFO L87 Difference]: Start difference. First operand 17227 states and 24358 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 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) [2022-11-22 02:24:07,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:24:07,551 INFO L93 Difference]: Finished difference Result 65257 states and 92401 transitions. [2022-11-22 02:24:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:24:07,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 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 [2022-11-22 02:24:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:24:07,668 INFO L225 Difference]: With dead ends: 65257 [2022-11-22 02:24:07,668 INFO L226 Difference]: Without dead ends: 48068 [2022-11-22 02:24:07,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:24:07,694 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 1754 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1754 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:24:07,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1754 Valid, 850 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 02:24:07,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48068 states. [2022-11-22 02:24:12,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48068 to 25651. [2022-11-22 02:24:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25651 states, 25650 states have (on average 1.396803118908382) internal successors, (35828), 25650 states have internal predecessors, (35828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:24:12,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25651 states to 25651 states and 35828 transitions. [2022-11-22 02:24:12,223 INFO L78 Accepts]: Start accepts. Automaton has 25651 states and 35828 transitions. Word has length 84 [2022-11-22 02:24:12,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:24:12,224 INFO L495 AbstractCegarLoop]: Abstraction has 25651 states and 35828 transitions. [2022-11-22 02:24:12,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 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) [2022-11-22 02:24:12,225 INFO L276 IsEmpty]: Start isEmpty. Operand 25651 states and 35828 transitions. [2022-11-22 02:24:12,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-22 02:24:12,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:24:12,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:24:12,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 02:24:12,292 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:24:12,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:24:12,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1413281339, now seen corresponding path program 1 times [2022-11-22 02:24:12,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:24:12,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426976114] [2022-11-22 02:24:12,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:12,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:24:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:24:16,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:24:16,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426976114] [2022-11-22 02:24:16,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426976114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:24:16,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:24:16,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-22 02:24:16,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603691106] [2022-11-22 02:24:16,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:24:16,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 02:24:16,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:24:16,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 02:24:16,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:24:16,518 INFO L87 Difference]: Start difference. First operand 25651 states and 35828 transitions. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 17 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) [2022-11-22 02:24:36,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:24:36,350 INFO L93 Difference]: Finished difference Result 85949 states and 119371 transitions. [2022-11-22 02:24:36,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-22 02:24:36,351 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 17 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 [2022-11-22 02:24:36,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:24:36,498 INFO L225 Difference]: With dead ends: 85949 [2022-11-22 02:24:36,499 INFO L226 Difference]: Without dead ends: 67197 [2022-11-22 02:24:36,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2022-11-22 02:24:36,530 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 5463 mSDsluCounter, 4220 mSDsCounter, 0 mSdLazyCounter, 5004 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5463 SdHoareTripleChecker+Valid, 4778 SdHoareTripleChecker+Invalid, 5337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 5004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:24:36,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5463 Valid, 4778 Invalid, 5337 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [333 Valid, 5004 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-22 02:24:36,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67197 states. [2022-11-22 02:24:45,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67197 to 44843. [2022-11-22 02:24:45,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44843 states, 44842 states have (on average 1.3743142589536594) internal successors, (61627), 44842 states have internal predecessors, (61627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:24:45,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44843 states to 44843 states and 61627 transitions. [2022-11-22 02:24:45,483 INFO L78 Accepts]: Start accepts. Automaton has 44843 states and 61627 transitions. Word has length 84 [2022-11-22 02:24:45,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:24:45,484 INFO L495 AbstractCegarLoop]: Abstraction has 44843 states and 61627 transitions. [2022-11-22 02:24:45,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 17 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) [2022-11-22 02:24:45,484 INFO L276 IsEmpty]: Start isEmpty. Operand 44843 states and 61627 transitions. [2022-11-22 02:24:45,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-22 02:24:45,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:24:45,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:24:45,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 02:24:45,596 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:24:45,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:24:45,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1809151606, now seen corresponding path program 1 times [2022-11-22 02:24:45,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:24:45,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013387272] [2022-11-22 02:24:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:45,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:24:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:24:45,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:24:45,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013387272] [2022-11-22 02:24:45,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013387272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:24:45,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:24:45,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:24:45,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207535482] [2022-11-22 02:24:45,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:24:45,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:24:45,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:24:45,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:24:45,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:24:45,702 INFO L87 Difference]: Start difference. First operand 44843 states and 61627 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)