./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74cec26-e8b3-441f-b13d-b47927fad828/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74cec26-e8b3-441f-b13d-b47927fad828/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74cec26-e8b3-441f-b13d-b47927fad828/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74cec26-e8b3-441f-b13d-b47927fad828/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74cec26-e8b3-441f-b13d-b47927fad828/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74cec26-e8b3-441f-b13d-b47927fad828/bin/utaipan-gh47qXpMRh --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 5aad5fd4611705ad6fdf71db638f2162c13b3da201193a54a746a0dc7cc3072f --- 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-2329fc7 [2022-12-14 05:38:27,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:38:27,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:38:27,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:38:27,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:38:27,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:38:27,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:38:27,710 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:38:27,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:38:27,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:38:27,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:38:27,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:38:27,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:38:27,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:38:27,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:38:27,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:38:27,716 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:38:27,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:38:27,717 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:38:27,718 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:38:27,719 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:38:27,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:38:27,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:38:27,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:38:27,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:38:27,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:38:27,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:38:27,725 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:38:27,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:38:27,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:38:27,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:38:27,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:38:27,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:38:27,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:38:27,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:38:27,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:38:27,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:38:27,729 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:38:27,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:38:27,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:38:27,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:38:27,731 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74cec26-e8b3-441f-b13d-b47927fad828/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 05:38:27,745 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:38:27,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:38:27,746 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:38:27,746 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:38:27,746 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:38:27,747 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:38:27,747 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:38:27,747 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:38:27,747 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:38:27,747 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:38:27,747 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:38:27,747 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:38:27,748 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:38:27,748 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:38:27,748 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:38:27,748 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:38:27,748 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:38:27,748 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:38:27,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:38:27,749 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:38:27,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:38:27,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:38:27,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:38:27,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 05:38:27,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:38:27,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 05:38:27,750 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:38:27,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 05:38:27,750 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:38:27,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 05:38:27,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:38:27,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:38:27,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:38:27,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:38:27,751 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:38:27,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:38:27,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 05:38:27,752 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:38:27,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:38:27,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 05:38:27,752 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:38:27,752 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_a74cec26-e8b3-441f-b13d-b47927fad828/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74cec26-e8b3-441f-b13d-b47927fad828/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5aad5fd4611705ad6fdf71db638f2162c13b3da201193a54a746a0dc7cc3072f [2022-12-14 05:38:27,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:38:27,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:38:27,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:38:27,960 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:38:27,961 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:38:27,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74cec26-e8b3-441f-b13d-b47927fad828/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2022-12-14 05:38:30,508 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:38:30,705 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:38:30,706 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74cec26-e8b3-441f-b13d-b47927fad828/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2022-12-14 05:38:30,714 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74cec26-e8b3-441f-b13d-b47927fad828/bin/utaipan-gh47qXpMRh/data/79b3453e1/724878e30d84424b8ca5ed1d6f4ea343/FLAG80994c1ab [2022-12-14 05:38:31,096 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74cec26-e8b3-441f-b13d-b47927fad828/bin/utaipan-gh47qXpMRh/data/79b3453e1/724878e30d84424b8ca5ed1d6f4ea343 [2022-12-14 05:38:31,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:38:31,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:38:31,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:38:31,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:38:31,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:38:31,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:38:31" (1/1) ... [2022-12-14 05:38:31,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ffd050a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:38:31, skipping insertion in model container [2022-12-14 05:38:31,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:38:31" (1/1) ... [2022-12-14 05:38:31,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:38:31,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:38:31,298 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_a74cec26-e8b3-441f-b13d-b47927fad828/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7251,7264] [2022-12-14 05:38:31,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:38:31,344 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:38:31,378 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_a74cec26-e8b3-441f-b13d-b47927fad828/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7251,7264] [2022-12-14 05:38:31,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:38:31,415 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:38:31,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:38:31 WrapperNode [2022-12-14 05:38:31,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:38:31,416 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:38:31,416 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:38:31,416 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:38:31,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:38:31" (1/1) ... [2022-12-14 05:38:31,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:38:31" (1/1) ... [2022-12-14 05:38:31,452 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 673 [2022-12-14 05:38:31,452 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:38:31,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:38:31,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:38:31,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:38:31,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:38:31" (1/1) ... [2022-12-14 05:38:31,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:38:31" (1/1) ... [2022-12-14 05:38:31,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:38:31" (1/1) ... [2022-12-14 05:38:31,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:38:31" (1/1) ... [2022-12-14 05:38:31,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:38:31" (1/1) ... [2022-12-14 05:38:31,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:38:31" (1/1) ... [2022-12-14 05:38:31,473 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:38:31" (1/1) ... [2022-12-14 05:38:31,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:38:31" (1/1) ... [2022-12-14 05:38:31,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:38:31,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:38:31,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:38:31,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:38:31,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:38:31" (1/1) ... [2022-12-14 05:38:31,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:38:31,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74cec26-e8b3-441f-b13d-b47927fad828/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:38:31,503 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74cec26-e8b3-441f-b13d-b47927fad828/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:38:31,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74cec26-e8b3-441f-b13d-b47927fad828/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:38:31,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:38:31,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 05:38:31,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:38:31,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:38:31,637 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:38:31,638 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:38:32,135 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:38:32,259 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:38:32,260 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 05:38:32,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:38:32 BoogieIcfgContainer [2022-12-14 05:38:32,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:38:32,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:38:32,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:38:32,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:38:32,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:38:31" (1/3) ... [2022-12-14 05:38:32,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd3331a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:38:32, skipping insertion in model container [2022-12-14 05:38:32,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:38:31" (2/3) ... [2022-12-14 05:38:32,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd3331a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:38:32, skipping insertion in model container [2022-12-14 05:38:32,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:38:32" (3/3) ... [2022-12-14 05:38:32,268 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2022-12-14 05:38:32,281 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:38:32,282 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 05:38:32,317 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:38:32,322 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;@31d64478, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:38:32,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 05:38:32,326 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 132 states have (on average 1.7045454545454546) internal successors, (225), 133 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:32,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 05:38:32,331 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:38:32,332 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] [2022-12-14 05:38:32,332 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:38:32,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:38:32,336 INFO L85 PathProgramCache]: Analyzing trace with hash -44573898, now seen corresponding path program 1 times [2022-12-14 05:38:32,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:38:32,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482679556] [2022-12-14 05:38:32,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:38:32,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:38:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:38:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:38:32,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:38:32,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482679556] [2022-12-14 05:38:32,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482679556] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:38:32,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:38:32,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:38:32,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696205179] [2022-12-14 05:38:32,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:38:32,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:38:32,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:38:32,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:38:32,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:38:32,857 INFO L87 Difference]: Start difference. First operand has 134 states, 132 states have (on average 1.7045454545454546) internal successors, (225), 133 states have internal predecessors, (225), 0 states have call successors, (0), 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 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:33,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:38:33,120 INFO L93 Difference]: Finished difference Result 406 states and 650 transitions. [2022-12-14 05:38:33,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:38:33,122 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-12-14 05:38:33,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:38:33,135 INFO L225 Difference]: With dead ends: 406 [2022-12-14 05:38:33,135 INFO L226 Difference]: Without dead ends: 324 [2022-12-14 05:38:33,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:38:33,142 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 785 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:38:33,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [785 Valid, 644 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:38:33,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-12-14 05:38:33,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 318. [2022-12-14 05:38:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.384858044164038) internal successors, (439), 317 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:33,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 439 transitions. [2022-12-14 05:38:33,230 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 439 transitions. Word has length 54 [2022-12-14 05:38:33,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:38:33,231 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 439 transitions. [2022-12-14 05:38:33,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:33,231 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 439 transitions. [2022-12-14 05:38:33,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 05:38:33,232 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:38:33,232 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] [2022-12-14 05:38:33,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 05:38:33,233 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:38:33,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:38:33,233 INFO L85 PathProgramCache]: Analyzing trace with hash -2077640328, now seen corresponding path program 1 times [2022-12-14 05:38:33,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:38:33,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141874234] [2022-12-14 05:38:33,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:38:33,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:38:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:38:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:38:33,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:38:33,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141874234] [2022-12-14 05:38:33,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141874234] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:38:33,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:38:33,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:38:33,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559280392] [2022-12-14 05:38:33,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:38:33,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:38:33,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:38:33,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:38:33,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:38:33,332 INFO L87 Difference]: Start difference. First operand 318 states and 439 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:33,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:38:33,585 INFO L93 Difference]: Finished difference Result 764 states and 1085 transitions. [2022-12-14 05:38:33,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:38:33,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2022-12-14 05:38:33,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:38:33,588 INFO L225 Difference]: With dead ends: 764 [2022-12-14 05:38:33,589 INFO L226 Difference]: Without dead ends: 496 [2022-12-14 05:38:33,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:38:33,591 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 468 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:38:33,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 188 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:38:33,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-12-14 05:38:33,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 494. [2022-12-14 05:38:33,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 1.4137931034482758) internal successors, (697), 493 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:33,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 697 transitions. [2022-12-14 05:38:33,646 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 697 transitions. Word has length 55 [2022-12-14 05:38:33,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:38:33,646 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 697 transitions. [2022-12-14 05:38:33,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:33,647 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 697 transitions. [2022-12-14 05:38:33,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 05:38:33,647 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:38:33,648 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] [2022-12-14 05:38:33,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 05:38:33,648 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:38:33,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:38:33,648 INFO L85 PathProgramCache]: Analyzing trace with hash 905797590, now seen corresponding path program 1 times [2022-12-14 05:38:33,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:38:33,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752706277] [2022-12-14 05:38:33,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:38:33,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:38:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:38:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:38:33,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:38:33,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752706277] [2022-12-14 05:38:33,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752706277] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:38:33,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:38:33,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:38:33,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411242728] [2022-12-14 05:38:33,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:38:33,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:38:33,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:38:33,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:38:33,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:38:33,736 INFO L87 Difference]: Start difference. First operand 494 states and 697 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:34,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:38:34,007 INFO L93 Difference]: Finished difference Result 1242 states and 1795 transitions. [2022-12-14 05:38:34,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:38:34,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2022-12-14 05:38:34,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:38:34,010 INFO L225 Difference]: With dead ends: 1242 [2022-12-14 05:38:34,010 INFO L226 Difference]: Without dead ends: 848 [2022-12-14 05:38:34,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:38:34,011 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 440 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:38:34,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 204 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:38:34,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-12-14 05:38:34,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 846. [2022-12-14 05:38:34,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 1.4355029585798817) internal successors, (1213), 845 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:34,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1213 transitions. [2022-12-14 05:38:34,093 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1213 transitions. Word has length 55 [2022-12-14 05:38:34,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:38:34,093 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1213 transitions. [2022-12-14 05:38:34,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:34,093 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1213 transitions. [2022-12-14 05:38:34,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 05:38:34,094 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:38:34,094 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] [2022-12-14 05:38:34,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 05:38:34,094 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:38:34,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:38:34,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1675515001, now seen corresponding path program 1 times [2022-12-14 05:38:34,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:38:34,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937527062] [2022-12-14 05:38:34,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:38:34,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:38:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:38:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:38:34,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:38:34,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937527062] [2022-12-14 05:38:34,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937527062] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:38:34,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:38:34,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:38:34,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535705251] [2022-12-14 05:38:34,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:38:34,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:38:34,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:38:34,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:38:34,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:38:34,177 INFO L87 Difference]: Start difference. First operand 846 states and 1213 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:34,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:38:34,527 INFO L93 Difference]: Finished difference Result 2325 states and 3384 transitions. [2022-12-14 05:38:34,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:38:34,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2022-12-14 05:38:34,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:38:34,532 INFO L225 Difference]: With dead ends: 2325 [2022-12-14 05:38:34,532 INFO L226 Difference]: Without dead ends: 1552 [2022-12-14 05:38:34,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:38:34,534 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 445 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:38:34,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 196 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:38:34,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2022-12-14 05:38:34,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1550. [2022-12-14 05:38:34,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 1.4441575209812783) internal successors, (2237), 1549 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:34,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 2237 transitions. [2022-12-14 05:38:34,679 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 2237 transitions. Word has length 55 [2022-12-14 05:38:34,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:38:34,680 INFO L495 AbstractCegarLoop]: Abstraction has 1550 states and 2237 transitions. [2022-12-14 05:38:34,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:34,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 2237 transitions. [2022-12-14 05:38:34,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 05:38:34,681 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:38:34,681 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] [2022-12-14 05:38:34,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 05:38:34,681 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:38:34,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:38:34,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1020589655, now seen corresponding path program 1 times [2022-12-14 05:38:34,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:38:34,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20458490] [2022-12-14 05:38:34,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:38:34,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:38:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:38:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:38:34,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:38:34,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20458490] [2022-12-14 05:38:34,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20458490] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:38:34,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:38:34,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:38:34,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899889408] [2022-12-14 05:38:34,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:38:34,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:38:34,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:38:34,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:38:34,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:38:34,762 INFO L87 Difference]: Start difference. First operand 1550 states and 2237 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:35,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:38:35,182 INFO L93 Difference]: Finished difference Result 4172 states and 6061 transitions. [2022-12-14 05:38:35,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:38:35,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2022-12-14 05:38:35,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:38:35,198 INFO L225 Difference]: With dead ends: 4172 [2022-12-14 05:38:35,198 INFO L226 Difference]: Without dead ends: 2656 [2022-12-14 05:38:35,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:38:35,202 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 461 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:38:35,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 180 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:38:35,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2022-12-14 05:38:35,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2654. [2022-12-14 05:38:35,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 2653 states have (on average 1.4364869958537505) internal successors, (3811), 2653 states have internal predecessors, (3811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:35,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3811 transitions. [2022-12-14 05:38:35,421 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3811 transitions. Word has length 55 [2022-12-14 05:38:35,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:38:35,421 INFO L495 AbstractCegarLoop]: Abstraction has 2654 states and 3811 transitions. [2022-12-14 05:38:35,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:35,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3811 transitions. [2022-12-14 05:38:35,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 05:38:35,422 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:38:35,422 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] [2022-12-14 05:38:35,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 05:38:35,422 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:38:35,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:38:35,422 INFO L85 PathProgramCache]: Analyzing trace with hash 963446346, now seen corresponding path program 1 times [2022-12-14 05:38:35,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:38:35,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543894365] [2022-12-14 05:38:35,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:38:35,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:38:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:38:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:38:36,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:38:36,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543894365] [2022-12-14 05:38:36,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543894365] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:38:36,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:38:36,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-12-14 05:38:36,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50460605] [2022-12-14 05:38:36,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:38:36,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 05:38:36,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:38:36,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 05:38:36,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:38:36,327 INFO L87 Difference]: Start difference. First operand 2654 states and 3811 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 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) [2022-12-14 05:38:37,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:38:37,625 INFO L93 Difference]: Finished difference Result 6136 states and 8815 transitions. [2022-12-14 05:38:37,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 05:38:37,626 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 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 [2022-12-14 05:38:37,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:38:37,639 INFO L225 Difference]: With dead ends: 6136 [2022-12-14 05:38:37,640 INFO L226 Difference]: Without dead ends: 4582 [2022-12-14 05:38:37,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2022-12-14 05:38:37,644 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 730 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:38:37,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 1491 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 05:38:37,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2022-12-14 05:38:38,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 3700. [2022-12-14 05:38:38,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3700 states, 3699 states have (on average 1.4257907542579076) internal successors, (5274), 3699 states have internal predecessors, (5274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:38,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3700 states to 3700 states and 5274 transitions. [2022-12-14 05:38:38,054 INFO L78 Accepts]: Start accepts. Automaton has 3700 states and 5274 transitions. Word has length 56 [2022-12-14 05:38:38,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:38:38,054 INFO L495 AbstractCegarLoop]: Abstraction has 3700 states and 5274 transitions. [2022-12-14 05:38:38,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 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) [2022-12-14 05:38:38,055 INFO L276 IsEmpty]: Start isEmpty. Operand 3700 states and 5274 transitions. [2022-12-14 05:38:38,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 05:38:38,056 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:38:38,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:38:38,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 05:38:38,056 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:38:38,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:38:38,057 INFO L85 PathProgramCache]: Analyzing trace with hash -754194934, now seen corresponding path program 1 times [2022-12-14 05:38:38,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:38:38,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340290093] [2022-12-14 05:38:38,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:38:38,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:38:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:38:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:38:38,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:38:38,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340290093] [2022-12-14 05:38:38,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340290093] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:38:38,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:38:38,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-12-14 05:38:38,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998603544] [2022-12-14 05:38:38,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:38:38,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 05:38:38,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:38:38,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 05:38:38,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-12-14 05:38:38,913 INFO L87 Difference]: Start difference. First operand 3700 states and 5274 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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) [2022-12-14 05:38:40,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:38:40,034 INFO L93 Difference]: Finished difference Result 4385 states and 6224 transitions. [2022-12-14 05:38:40,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 05:38:40,034 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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 [2022-12-14 05:38:40,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:38:40,042 INFO L225 Difference]: With dead ends: 4385 [2022-12-14 05:38:40,042 INFO L226 Difference]: Without dead ends: 4383 [2022-12-14 05:38:40,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2022-12-14 05:38:40,043 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 815 mSDsluCounter, 1663 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:38:40,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [815 Valid, 1914 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:38:40,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4383 states. [2022-12-14 05:38:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4383 to 4120. [2022-12-14 05:38:40,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4120 states, 4119 states have (on average 1.4238892935178442) internal successors, (5865), 4119 states have internal predecessors, (5865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:40,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4120 states to 4120 states and 5865 transitions. [2022-12-14 05:38:40,406 INFO L78 Accepts]: Start accepts. Automaton has 4120 states and 5865 transitions. Word has length 56 [2022-12-14 05:38:40,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:38:40,406 INFO L495 AbstractCegarLoop]: Abstraction has 4120 states and 5865 transitions. [2022-12-14 05:38:40,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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) [2022-12-14 05:38:40,406 INFO L276 IsEmpty]: Start isEmpty. Operand 4120 states and 5865 transitions. [2022-12-14 05:38:40,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 05:38:40,406 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:38:40,406 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] [2022-12-14 05:38:40,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 05:38:40,407 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:38:40,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:38:40,407 INFO L85 PathProgramCache]: Analyzing trace with hash -392834518, now seen corresponding path program 1 times [2022-12-14 05:38:40,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:38:40,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551110251] [2022-12-14 05:38:40,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:38:40,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:38:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:38:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:38:41,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:38:41,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551110251] [2022-12-14 05:38:41,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551110251] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:38:41,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:38:41,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-12-14 05:38:41,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996714656] [2022-12-14 05:38:41,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:38:41,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 05:38:41,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:38:41,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 05:38:41,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-12-14 05:38:41,179 INFO L87 Difference]: Start difference. First operand 4120 states and 5865 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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) [2022-12-14 05:38:42,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:38:42,335 INFO L93 Difference]: Finished difference Result 6210 states and 8839 transitions. [2022-12-14 05:38:42,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 05:38:42,336 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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 [2022-12-14 05:38:42,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:38:42,345 INFO L225 Difference]: With dead ends: 6210 [2022-12-14 05:38:42,345 INFO L226 Difference]: Without dead ends: 5392 [2022-12-14 05:38:42,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2022-12-14 05:38:42,347 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 710 mSDsluCounter, 1352 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 1620 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:38:42,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [710 Valid, 1620 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:38:42,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5392 states. [2022-12-14 05:38:42,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5392 to 4856. [2022-12-14 05:38:42,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4856 states, 4855 states have (on average 1.4218331616889803) internal successors, (6903), 4855 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:42,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 6903 transitions. [2022-12-14 05:38:42,835 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 6903 transitions. Word has length 56 [2022-12-14 05:38:42,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:38:42,835 INFO L495 AbstractCegarLoop]: Abstraction has 4856 states and 6903 transitions. [2022-12-14 05:38:42,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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) [2022-12-14 05:38:42,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 6903 transitions. [2022-12-14 05:38:42,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 05:38:42,836 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:38:42,836 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] [2022-12-14 05:38:42,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 05:38:42,836 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:38:42,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:38:42,836 INFO L85 PathProgramCache]: Analyzing trace with hash -171867542, now seen corresponding path program 1 times [2022-12-14 05:38:42,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:38:42,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812018748] [2022-12-14 05:38:42,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:38:42,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:38:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:38:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:38:43,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:38:43,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812018748] [2022-12-14 05:38:43,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812018748] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:38:43,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:38:43,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-12-14 05:38:43,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655798069] [2022-12-14 05:38:43,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:38:43,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 05:38:43,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:38:43,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 05:38:43,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-12-14 05:38:43,487 INFO L87 Difference]: Start difference. First operand 4856 states and 6903 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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) [2022-12-14 05:38:45,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:38:45,232 INFO L93 Difference]: Finished difference Result 8753 states and 12508 transitions. [2022-12-14 05:38:45,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 05:38:45,233 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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 [2022-12-14 05:38:45,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:38:45,250 INFO L225 Difference]: With dead ends: 8753 [2022-12-14 05:38:45,250 INFO L226 Difference]: Without dead ends: 8751 [2022-12-14 05:38:45,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2022-12-14 05:38:45,252 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 671 mSDsluCounter, 1772 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 2050 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:38:45,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 2050 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 05:38:45,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8751 states. [2022-12-14 05:38:45,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8751 to 6985. [2022-12-14 05:38:45,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6985 states, 6984 states have (on average 1.424971363115693) internal successors, (9952), 6984 states have internal predecessors, (9952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:45,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6985 states to 6985 states and 9952 transitions. [2022-12-14 05:38:45,932 INFO L78 Accepts]: Start accepts. Automaton has 6985 states and 9952 transitions. Word has length 56 [2022-12-14 05:38:45,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:38:45,932 INFO L495 AbstractCegarLoop]: Abstraction has 6985 states and 9952 transitions. [2022-12-14 05:38:45,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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) [2022-12-14 05:38:45,932 INFO L276 IsEmpty]: Start isEmpty. Operand 6985 states and 9952 transitions. [2022-12-14 05:38:45,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 05:38:45,933 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:38:45,933 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] [2022-12-14 05:38:45,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 05:38:45,933 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:38:45,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:38:45,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1585617950, now seen corresponding path program 1 times [2022-12-14 05:38:45,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:38:45,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246419422] [2022-12-14 05:38:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:38:45,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:38:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:38:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:38:46,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:38:46,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246419422] [2022-12-14 05:38:46,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246419422] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:38:46,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:38:46,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-12-14 05:38:46,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082297057] [2022-12-14 05:38:46,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:38:46,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 05:38:46,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:38:46,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 05:38:46,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-12-14 05:38:46,700 INFO L87 Difference]: Start difference. First operand 6985 states and 9952 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:48,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:38:48,536 INFO L93 Difference]: Finished difference Result 8040 states and 11435 transitions. [2022-12-14 05:38:48,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 05:38:48,537 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2022-12-14 05:38:48,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:38:48,554 INFO L225 Difference]: With dead ends: 8040 [2022-12-14 05:38:48,554 INFO L226 Difference]: Without dead ends: 8038 [2022-12-14 05:38:48,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=874, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 05:38:48,556 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 872 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:38:48,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [872 Valid, 1174 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1330 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 05:38:48,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8038 states. [2022-12-14 05:38:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8038 to 6994. [2022-12-14 05:38:49,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6994 states, 6993 states have (on average 1.4247104247104247) internal successors, (9963), 6993 states have internal predecessors, (9963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6994 states to 6994 states and 9963 transitions. [2022-12-14 05:38:49,385 INFO L78 Accepts]: Start accepts. Automaton has 6994 states and 9963 transitions. Word has length 58 [2022-12-14 05:38:49,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:38:49,386 INFO L495 AbstractCegarLoop]: Abstraction has 6994 states and 9963 transitions. [2022-12-14 05:38:49,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:49,386 INFO L276 IsEmpty]: Start isEmpty. Operand 6994 states and 9963 transitions. [2022-12-14 05:38:49,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 05:38:49,387 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:38:49,387 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] [2022-12-14 05:38:49,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 05:38:49,387 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:38:49,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:38:49,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1946978366, now seen corresponding path program 1 times [2022-12-14 05:38:49,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:38:49,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064410244] [2022-12-14 05:38:49,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:38:49,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:38:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:38:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:38:50,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:38:50,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064410244] [2022-12-14 05:38:50,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064410244] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:38:50,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:38:50,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-12-14 05:38:50,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638598987] [2022-12-14 05:38:50,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:38:50,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 05:38:50,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:38:50,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 05:38:50,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:38:50,191 INFO L87 Difference]: Start difference. First operand 6994 states and 9963 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:51,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:38:51,600 INFO L93 Difference]: Finished difference Result 9094 states and 12947 transitions. [2022-12-14 05:38:51,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 05:38:51,601 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2022-12-14 05:38:51,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:38:51,611 INFO L225 Difference]: With dead ends: 9094 [2022-12-14 05:38:51,611 INFO L226 Difference]: Without dead ends: 8276 [2022-12-14 05:38:51,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2022-12-14 05:38:51,614 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 665 mSDsluCounter, 1501 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 1769 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:38:51,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 1769 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:38:51,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8276 states. [2022-12-14 05:38:52,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8276 to 6991. [2022-12-14 05:38:52,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6991 states, 6990 states have (on average 1.424749642346209) internal successors, (9959), 6990 states have internal predecessors, (9959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6991 states to 6991 states and 9959 transitions. [2022-12-14 05:38:52,314 INFO L78 Accepts]: Start accepts. Automaton has 6991 states and 9959 transitions. Word has length 58 [2022-12-14 05:38:52,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:38:52,314 INFO L495 AbstractCegarLoop]: Abstraction has 6991 states and 9959 transitions. [2022-12-14 05:38:52,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 6991 states and 9959 transitions. [2022-12-14 05:38:52,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 05:38:52,315 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:38:52,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:38:52,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 05:38:52,315 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:38:52,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:38:52,316 INFO L85 PathProgramCache]: Analyzing trace with hash -425201666, now seen corresponding path program 1 times [2022-12-14 05:38:52,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:38:52,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363841103] [2022-12-14 05:38:52,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:38:52,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:38:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:38:53,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:38:53,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:38:53,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363841103] [2022-12-14 05:38:53,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363841103] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:38:53,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:38:53,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-12-14 05:38:53,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935716719] [2022-12-14 05:38:53,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:38:53,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 05:38:53,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:38:53,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 05:38:53,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:38:53,086 INFO L87 Difference]: Start difference. First operand 6991 states and 9959 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:54,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:38:54,598 INFO L93 Difference]: Finished difference Result 8058 states and 11454 transitions. [2022-12-14 05:38:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 05:38:54,598 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2022-12-14 05:38:54,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:38:54,609 INFO L225 Difference]: With dead ends: 8058 [2022-12-14 05:38:54,609 INFO L226 Difference]: Without dead ends: 8056 [2022-12-14 05:38:54,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2022-12-14 05:38:54,611 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 533 mSDsluCounter, 1535 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1793 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:38:54,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1793 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 05:38:54,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8056 states. [2022-12-14 05:38:55,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8056 to 7004. [2022-12-14 05:38:55,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7004 states, 7003 states have (on average 1.4243895473368557) internal successors, (9975), 7003 states have internal predecessors, (9975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:55,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7004 states to 7004 states and 9975 transitions. [2022-12-14 05:38:55,347 INFO L78 Accepts]: Start accepts. Automaton has 7004 states and 9975 transitions. Word has length 58 [2022-12-14 05:38:55,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:38:55,347 INFO L495 AbstractCegarLoop]: Abstraction has 7004 states and 9975 transitions. [2022-12-14 05:38:55,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:55,347 INFO L276 IsEmpty]: Start isEmpty. Operand 7004 states and 9975 transitions. [2022-12-14 05:38:55,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 05:38:55,348 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:38:55,348 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] [2022-12-14 05:38:55,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 05:38:55,348 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:38:55,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:38:55,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1106661250, now seen corresponding path program 1 times [2022-12-14 05:38:55,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:38:55,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081598273] [2022-12-14 05:38:55,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:38:55,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:38:55,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:38:55,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:38:55,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:38:55,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081598273] [2022-12-14 05:38:55,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081598273] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:38:55,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:38:55,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-12-14 05:38:55,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885235688] [2022-12-14 05:38:55,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:38:55,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 05:38:55,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:38:55,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 05:38:55,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-12-14 05:38:55,969 INFO L87 Difference]: Start difference. First operand 7004 states and 9975 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:57,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:38:57,850 INFO L93 Difference]: Finished difference Result 10470 states and 14957 transitions. [2022-12-14 05:38:57,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 05:38:57,851 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2022-12-14 05:38:57,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:38:57,860 INFO L225 Difference]: With dead ends: 10470 [2022-12-14 05:38:57,860 INFO L226 Difference]: Without dead ends: 8916 [2022-12-14 05:38:57,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2022-12-14 05:38:57,863 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 600 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:38:57,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 1179 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 05:38:57,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8916 states. [2022-12-14 05:38:58,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8916 to 6997. [2022-12-14 05:38:58,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6997 states, 6996 states have (on average 1.4245283018867925) internal successors, (9966), 6996 states have internal predecessors, (9966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:58,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6997 states to 6997 states and 9966 transitions. [2022-12-14 05:38:58,642 INFO L78 Accepts]: Start accepts. Automaton has 6997 states and 9966 transitions. Word has length 58 [2022-12-14 05:38:58,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:38:58,642 INFO L495 AbstractCegarLoop]: Abstraction has 6997 states and 9966 transitions. [2022-12-14 05:38:58,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:58,642 INFO L276 IsEmpty]: Start isEmpty. Operand 6997 states and 9966 transitions. [2022-12-14 05:38:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 05:38:58,643 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:38:58,643 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] [2022-12-14 05:38:58,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 05:38:58,643 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:38:58,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:38:58,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1470664766, now seen corresponding path program 1 times [2022-12-14 05:38:58,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:38:58,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227703433] [2022-12-14 05:38:58,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:38:58,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:38:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:38:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:38:59,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:38:59,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227703433] [2022-12-14 05:38:59,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227703433] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:38:59,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:38:59,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-12-14 05:38:59,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954827880] [2022-12-14 05:38:59,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:38:59,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 05:38:59,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:38:59,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 05:38:59,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:38:59,237 INFO L87 Difference]: Start difference. First operand 6997 states and 9966 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:01,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:01,681 INFO L93 Difference]: Finished difference Result 11355 states and 16200 transitions. [2022-12-14 05:39:01,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 05:39:01,682 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2022-12-14 05:39:01,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:01,691 INFO L225 Difference]: With dead ends: 11355 [2022-12-14 05:39:01,692 INFO L226 Difference]: Without dead ends: 11353 [2022-12-14 05:39:01,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2022-12-14 05:39:01,694 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 687 mSDsluCounter, 1991 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 2286 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:01,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 2286 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 05:39:01,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11353 states. [2022-12-14 05:39:02,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11353 to 7003. [2022-12-14 05:39:02,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7003 states, 7002 states have (on average 1.4243073407597828) internal successors, (9973), 7002 states have internal predecessors, (9973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:02,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7003 states to 7003 states and 9973 transitions. [2022-12-14 05:39:02,545 INFO L78 Accepts]: Start accepts. Automaton has 7003 states and 9973 transitions. Word has length 58 [2022-12-14 05:39:02,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:02,545 INFO L495 AbstractCegarLoop]: Abstraction has 7003 states and 9973 transitions. [2022-12-14 05:39:02,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:02,545 INFO L276 IsEmpty]: Start isEmpty. Operand 7003 states and 9973 transitions. [2022-12-14 05:39:02,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 05:39:02,546 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:02,546 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] [2022-12-14 05:39:02,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 05:39:02,546 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:02,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:02,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1832025182, now seen corresponding path program 1 times [2022-12-14 05:39:02,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:02,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312901959] [2022-12-14 05:39:02,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:02,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:39:03,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:03,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312901959] [2022-12-14 05:39:03,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312901959] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:03,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:39:03,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-12-14 05:39:03,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117094383] [2022-12-14 05:39:03,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:03,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 05:39:03,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:03,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 05:39:03,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:39:03,134 INFO L87 Difference]: Start difference. First operand 7003 states and 9973 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:05,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:05,543 INFO L93 Difference]: Finished difference Result 14617 states and 20875 transitions. [2022-12-14 05:39:05,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 05:39:05,543 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2022-12-14 05:39:05,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:05,555 INFO L225 Difference]: With dead ends: 14617 [2022-12-14 05:39:05,555 INFO L226 Difference]: Without dead ends: 12983 [2022-12-14 05:39:05,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2022-12-14 05:39:05,559 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 609 mSDsluCounter, 1399 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:05,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 1667 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 05:39:05,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12983 states. [2022-12-14 05:39:07,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12983 to 8360. [2022-12-14 05:39:07,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8360 states, 8359 states have (on average 1.4225385811699964) internal successors, (11891), 8359 states have internal predecessors, (11891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:07,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8360 states to 8360 states and 11891 transitions. [2022-12-14 05:39:07,066 INFO L78 Accepts]: Start accepts. Automaton has 8360 states and 11891 transitions. Word has length 58 [2022-12-14 05:39:07,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:07,067 INFO L495 AbstractCegarLoop]: Abstraction has 8360 states and 11891 transitions. [2022-12-14 05:39:07,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:07,067 INFO L276 IsEmpty]: Start isEmpty. Operand 8360 states and 11891 transitions. [2022-12-14 05:39:07,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 05:39:07,068 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:07,068 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] [2022-12-14 05:39:07,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 05:39:07,068 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:07,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:07,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1612016413, now seen corresponding path program 1 times [2022-12-14 05:39:07,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:07,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390214540] [2022-12-14 05:39:07,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:07,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:39:07,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:07,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390214540] [2022-12-14 05:39:07,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390214540] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:07,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:39:07,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:39:07,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620431593] [2022-12-14 05:39:07,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:07,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:39:07,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:07,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:39:07,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:39:07,105 INFO L87 Difference]: Start difference. First operand 8360 states and 11891 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:08,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:08,480 INFO L93 Difference]: Finished difference Result 14322 states and 20423 transitions. [2022-12-14 05:39:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:39:08,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2022-12-14 05:39:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:08,486 INFO L225 Difference]: With dead ends: 14322 [2022-12-14 05:39:08,487 INFO L226 Difference]: Without dead ends: 6164 [2022-12-14 05:39:08,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:39:08,493 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 110 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:08,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 303 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:39:08,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6164 states. [2022-12-14 05:39:09,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6164 to 6025. [2022-12-14 05:39:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6025 states, 6024 states have (on average 1.4173306772908367) internal successors, (8538), 6024 states have internal predecessors, (8538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6025 states to 6025 states and 8538 transitions. [2022-12-14 05:39:09,620 INFO L78 Accepts]: Start accepts. Automaton has 6025 states and 8538 transitions. Word has length 59 [2022-12-14 05:39:09,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:09,620 INFO L495 AbstractCegarLoop]: Abstraction has 6025 states and 8538 transitions. [2022-12-14 05:39:09,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:09,621 INFO L276 IsEmpty]: Start isEmpty. Operand 6025 states and 8538 transitions. [2022-12-14 05:39:09,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 05:39:09,621 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:09,621 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] [2022-12-14 05:39:09,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 05:39:09,621 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:09,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:09,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1423202615, now seen corresponding path program 1 times [2022-12-14 05:39:09,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:09,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073399695] [2022-12-14 05:39:09,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:09,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:39:09,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:09,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073399695] [2022-12-14 05:39:09,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073399695] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:09,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:39:09,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:39:09,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922091365] [2022-12-14 05:39:09,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:09,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:39:09,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:09,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:39:09,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:39:09,646 INFO L87 Difference]: Start difference. First operand 6025 states and 8538 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:10,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:10,526 INFO L93 Difference]: Finished difference Result 10394 states and 14791 transitions. [2022-12-14 05:39:10,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:39:10,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2022-12-14 05:39:10,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:10,534 INFO L225 Difference]: With dead ends: 10394 [2022-12-14 05:39:10,534 INFO L226 Difference]: Without dead ends: 5802 [2022-12-14 05:39:10,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:39:10,538 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 112 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:10,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 291 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:39:10,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5802 states. [2022-12-14 05:39:11,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5802 to 5800. [2022-12-14 05:39:11,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5800 states, 5799 states have (on average 1.4155888946370063) internal successors, (8209), 5799 states have internal predecessors, (8209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:11,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5800 states to 5800 states and 8209 transitions. [2022-12-14 05:39:11,319 INFO L78 Accepts]: Start accepts. Automaton has 5800 states and 8209 transitions. Word has length 59 [2022-12-14 05:39:11,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:11,319 INFO L495 AbstractCegarLoop]: Abstraction has 5800 states and 8209 transitions. [2022-12-14 05:39:11,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:11,319 INFO L276 IsEmpty]: Start isEmpty. Operand 5800 states and 8209 transitions. [2022-12-14 05:39:11,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 05:39:11,320 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:11,320 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] [2022-12-14 05:39:11,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 05:39:11,320 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:11,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:11,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1867084050, now seen corresponding path program 1 times [2022-12-14 05:39:11,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:11,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860304245] [2022-12-14 05:39:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:11,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:39:13,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:13,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860304245] [2022-12-14 05:39:13,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860304245] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:13,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:39:13,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-12-14 05:39:13,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978000972] [2022-12-14 05:39:13,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:13,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 05:39:13,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:13,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 05:39:13,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-12-14 05:39:13,154 INFO L87 Difference]: Start difference. First operand 5800 states and 8209 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:17,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:17,856 INFO L93 Difference]: Finished difference Result 6460 states and 9115 transitions. [2022-12-14 05:39:17,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-14 05:39:17,857 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2022-12-14 05:39:17,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:17,862 INFO L225 Difference]: With dead ends: 6460 [2022-12-14 05:39:17,863 INFO L226 Difference]: Without dead ends: 6458 [2022-12-14 05:39:17,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=619, Invalid=1931, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 05:39:17,864 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 1039 mSDsluCounter, 2031 mSDsCounter, 0 mSdLazyCounter, 1741 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1039 SdHoareTripleChecker+Valid, 2280 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:17,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1039 Valid, 2280 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1741 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 05:39:17,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6458 states. [2022-12-14 05:39:18,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6458 to 5800. [2022-12-14 05:39:18,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5800 states, 5799 states have (on average 1.4155888946370063) internal successors, (8209), 5799 states have internal predecessors, (8209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5800 states to 5800 states and 8209 transitions. [2022-12-14 05:39:18,654 INFO L78 Accepts]: Start accepts. Automaton has 5800 states and 8209 transitions. Word has length 60 [2022-12-14 05:39:18,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:18,654 INFO L495 AbstractCegarLoop]: Abstraction has 5800 states and 8209 transitions. [2022-12-14 05:39:18,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:18,654 INFO L276 IsEmpty]: Start isEmpty. Operand 5800 states and 8209 transitions. [2022-12-14 05:39:18,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 05:39:18,655 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:18,655 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] [2022-12-14 05:39:18,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 05:39:18,655 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:18,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:18,656 INFO L85 PathProgramCache]: Analyzing trace with hash 782076242, now seen corresponding path program 1 times [2022-12-14 05:39:18,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:18,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807717315] [2022-12-14 05:39:18,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:18,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:39:20,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:20,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807717315] [2022-12-14 05:39:20,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807717315] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:20,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:39:20,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-12-14 05:39:20,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216885686] [2022-12-14 05:39:20,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:20,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 05:39:20,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:20,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 05:39:20,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-12-14 05:39:20,311 INFO L87 Difference]: Start difference. First operand 5800 states and 8209 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:25,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:25,091 INFO L93 Difference]: Finished difference Result 7564 states and 10627 transitions. [2022-12-14 05:39:25,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 05:39:25,092 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2022-12-14 05:39:25,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:25,098 INFO L225 Difference]: With dead ends: 7564 [2022-12-14 05:39:25,098 INFO L226 Difference]: Without dead ends: 7562 [2022-12-14 05:39:25,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=640, Invalid=2012, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 05:39:25,101 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 973 mSDsluCounter, 2941 mSDsCounter, 0 mSdLazyCounter, 2193 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 3212 SdHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:25,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [973 Valid, 3212 Invalid, 2208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2193 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 05:39:25,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7562 states. [2022-12-14 05:39:25,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7562 to 5806. [2022-12-14 05:39:25,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5806 states, 5805 states have (on average 1.4153316106804479) internal successors, (8216), 5805 states have internal predecessors, (8216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:25,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5806 states to 5806 states and 8216 transitions. [2022-12-14 05:39:25,962 INFO L78 Accepts]: Start accepts. Automaton has 5806 states and 8216 transitions. Word has length 60 [2022-12-14 05:39:25,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:25,962 INFO L495 AbstractCegarLoop]: Abstraction has 5806 states and 8216 transitions. [2022-12-14 05:39:25,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:25,962 INFO L276 IsEmpty]: Start isEmpty. Operand 5806 states and 8216 transitions. [2022-12-14 05:39:25,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 05:39:25,963 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:25,963 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] [2022-12-14 05:39:25,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 05:39:25,963 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:25,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:25,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1143436658, now seen corresponding path program 1 times [2022-12-14 05:39:25,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:25,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543025635] [2022-12-14 05:39:25,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:25,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:39:27,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:27,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543025635] [2022-12-14 05:39:27,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543025635] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:27,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:39:27,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-12-14 05:39:27,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825024341] [2022-12-14 05:39:27,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:27,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 05:39:27,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:27,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 05:39:27,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-12-14 05:39:27,617 INFO L87 Difference]: Start difference. First operand 5806 states and 8216 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:32,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:32,050 INFO L93 Difference]: Finished difference Result 8454 states and 11967 transitions. [2022-12-14 05:39:32,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 05:39:32,051 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2022-12-14 05:39:32,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:32,058 INFO L225 Difference]: With dead ends: 8454 [2022-12-14 05:39:32,058 INFO L226 Difference]: Without dead ends: 7668 [2022-12-14 05:39:32,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=529, Invalid=1727, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 05:39:32,061 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 680 mSDsluCounter, 2751 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 3008 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:32,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 3008 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1805 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 05:39:32,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7668 states. [2022-12-14 05:39:32,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7668 to 5790. [2022-12-14 05:39:32,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5790 states, 5789 states have (on average 1.4163067887372602) internal successors, (8199), 5789 states have internal predecessors, (8199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:32,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5790 states to 5790 states and 8199 transitions. [2022-12-14 05:39:32,958 INFO L78 Accepts]: Start accepts. Automaton has 5790 states and 8199 transitions. Word has length 60 [2022-12-14 05:39:32,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:32,959 INFO L495 AbstractCegarLoop]: Abstraction has 5790 states and 8199 transitions. [2022-12-14 05:39:32,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:32,959 INFO L276 IsEmpty]: Start isEmpty. Operand 5790 states and 8199 transitions. [2022-12-14 05:39:32,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 05:39:32,959 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:32,959 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] [2022-12-14 05:39:32,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 05:39:32,960 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:32,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:32,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1228743374, now seen corresponding path program 1 times [2022-12-14 05:39:32,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:32,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356140126] [2022-12-14 05:39:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:32,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:39:34,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:34,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356140126] [2022-12-14 05:39:34,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356140126] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:34,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:39:34,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-12-14 05:39:34,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475104701] [2022-12-14 05:39:34,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:34,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 05:39:34,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:34,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 05:39:34,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-12-14 05:39:34,745 INFO L87 Difference]: Start difference. First operand 5790 states and 8199 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:38,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:38,307 INFO L93 Difference]: Finished difference Result 6825 states and 9641 transitions. [2022-12-14 05:39:38,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 05:39:38,308 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2022-12-14 05:39:38,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:38,314 INFO L225 Difference]: With dead ends: 6825 [2022-12-14 05:39:38,314 INFO L226 Difference]: Without dead ends: 6823 [2022-12-14 05:39:38,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=513, Invalid=1467, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 05:39:38,316 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 680 mSDsluCounter, 1931 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 2186 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:38,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 2186 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 05:39:38,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6823 states. [2022-12-14 05:39:39,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6823 to 5787. [2022-12-14 05:39:39,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5787 states, 5786 states have (on average 1.4163498098859315) internal successors, (8195), 5786 states have internal predecessors, (8195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:39,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5787 states to 5787 states and 8195 transitions. [2022-12-14 05:39:39,244 INFO L78 Accepts]: Start accepts. Automaton has 5787 states and 8195 transitions. Word has length 60 [2022-12-14 05:39:39,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:39,244 INFO L495 AbstractCegarLoop]: Abstraction has 5787 states and 8195 transitions. [2022-12-14 05:39:39,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:39,244 INFO L276 IsEmpty]: Start isEmpty. Operand 5787 states and 8195 transitions. [2022-12-14 05:39:39,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 05:39:39,245 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:39,245 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] [2022-12-14 05:39:39,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 05:39:39,245 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:39,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:39,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1316706458, now seen corresponding path program 1 times [2022-12-14 05:39:39,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:39,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849297178] [2022-12-14 05:39:39,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:39,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:39:39,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:39,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849297178] [2022-12-14 05:39:39,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849297178] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:39,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:39:39,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:39:39,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454523904] [2022-12-14 05:39:39,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:39,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:39:39,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:39,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:39:39,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:39:39,276 INFO L87 Difference]: Start difference. First operand 5787 states and 8195 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:40,245 INFO L93 Difference]: Finished difference Result 11264 states and 16012 transitions. [2022-12-14 05:39:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:39:40,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2022-12-14 05:39:40,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:40,251 INFO L225 Difference]: With dead ends: 11264 [2022-12-14 05:39:40,251 INFO L226 Difference]: Without dead ends: 5582 [2022-12-14 05:39:40,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:39:40,256 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 105 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:40,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 291 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:39:40,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5582 states. [2022-12-14 05:39:41,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5582 to 5579. [2022-12-14 05:39:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5579 states, 5578 states have (on average 1.413768375761922) internal successors, (7886), 5578 states have internal predecessors, (7886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:41,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5579 states to 5579 states and 7886 transitions. [2022-12-14 05:39:41,118 INFO L78 Accepts]: Start accepts. Automaton has 5579 states and 7886 transitions. Word has length 61 [2022-12-14 05:39:41,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:41,119 INFO L495 AbstractCegarLoop]: Abstraction has 5579 states and 7886 transitions. [2022-12-14 05:39:41,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:41,119 INFO L276 IsEmpty]: Start isEmpty. Operand 5579 states and 7886 transitions. [2022-12-14 05:39:41,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 05:39:41,119 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:41,119 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] [2022-12-14 05:39:41,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 05:39:41,119 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:41,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:41,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1138289720, now seen corresponding path program 1 times [2022-12-14 05:39:41,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:41,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123827201] [2022-12-14 05:39:41,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:41,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:39:41,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:41,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123827201] [2022-12-14 05:39:41,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123827201] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:41,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:39:41,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:39:41,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323708408] [2022-12-14 05:39:41,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:41,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:39:41,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:41,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:39:41,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:39:41,145 INFO L87 Difference]: Start difference. First operand 5579 states and 7886 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:42,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:42,045 INFO L93 Difference]: Finished difference Result 9833 states and 13937 transitions. [2022-12-14 05:39:42,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:39:42,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2022-12-14 05:39:42,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:42,051 INFO L225 Difference]: With dead ends: 9833 [2022-12-14 05:39:42,051 INFO L226 Difference]: Without dead ends: 5321 [2022-12-14 05:39:42,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:39:42,054 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 109 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:42,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 279 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:39:42,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5321 states. [2022-12-14 05:39:42,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5321 to 5319. [2022-12-14 05:39:42,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5319 states, 5318 states have (on average 1.4104926664159458) internal successors, (7501), 5318 states have internal predecessors, (7501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:42,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5319 states to 5319 states and 7501 transitions. [2022-12-14 05:39:42,908 INFO L78 Accepts]: Start accepts. Automaton has 5319 states and 7501 transitions. Word has length 61 [2022-12-14 05:39:42,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:42,908 INFO L495 AbstractCegarLoop]: Abstraction has 5319 states and 7501 transitions. [2022-12-14 05:39:42,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:42,909 INFO L276 IsEmpty]: Start isEmpty. Operand 5319 states and 7501 transitions. [2022-12-14 05:39:42,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 05:39:42,909 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:42,909 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] [2022-12-14 05:39:42,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 05:39:42,909 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:42,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:42,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1537351354, now seen corresponding path program 1 times [2022-12-14 05:39:42,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:42,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13561012] [2022-12-14 05:39:42,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:42,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:39:47,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:47,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13561012] [2022-12-14 05:39:47,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13561012] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:47,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:39:47,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-12-14 05:39:47,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638792862] [2022-12-14 05:39:47,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:47,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 05:39:47,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:47,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 05:39:47,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 05:39:47,789 INFO L87 Difference]: Start difference. First operand 5319 states and 7501 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 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) [2022-12-14 05:39:55,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:55,666 INFO L93 Difference]: Finished difference Result 5895 states and 8301 transitions. [2022-12-14 05:39:55,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 05:39:55,667 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 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 [2022-12-14 05:39:55,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:55,671 INFO L225 Difference]: With dead ends: 5895 [2022-12-14 05:39:55,672 INFO L226 Difference]: Without dead ends: 5893 [2022-12-14 05:39:55,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1028, Invalid=3262, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 05:39:55,673 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 731 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 2321 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 2322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:55,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [731 Valid, 1187 Invalid, 2322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2321 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 05:39:55,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5893 states. [2022-12-14 05:39:56,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5893 to 5295. [2022-12-14 05:39:56,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5295 states, 5294 states have (on average 1.4119758216849263) internal successors, (7475), 5294 states have internal predecessors, (7475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5295 states to 5295 states and 7475 transitions. [2022-12-14 05:39:56,568 INFO L78 Accepts]: Start accepts. Automaton has 5295 states and 7475 transitions. Word has length 62 [2022-12-14 05:39:56,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:56,568 INFO L495 AbstractCegarLoop]: Abstraction has 5295 states and 7475 transitions. [2022-12-14 05:39:56,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 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) [2022-12-14 05:39:56,569 INFO L276 IsEmpty]: Start isEmpty. Operand 5295 states and 7475 transitions. [2022-12-14 05:39:56,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 05:39:56,569 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:56,569 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:39:56,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 05:39:56,570 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:56,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:56,570 INFO L85 PathProgramCache]: Analyzing trace with hash 789523559, now seen corresponding path program 1 times [2022-12-14 05:39:56,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:56,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422319386] [2022-12-14 05:39:56,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:56,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:56,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:39:56,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:56,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422319386] [2022-12-14 05:39:56,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422319386] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:56,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:39:56,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:39:56,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980281383] [2022-12-14 05:39:56,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:56,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:39:56,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:56,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:39:56,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:39:56,623 INFO L87 Difference]: Start difference. First operand 5295 states and 7475 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:57,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:57,725 INFO L93 Difference]: Finished difference Result 8828 states and 12602 transitions. [2022-12-14 05:39:57,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:39:57,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-12-14 05:39:57,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:57,732 INFO L225 Difference]: With dead ends: 8828 [2022-12-14 05:39:57,732 INFO L226 Difference]: Without dead ends: 6650 [2022-12-14 05:39:57,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:39:57,735 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 80 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:57,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 338 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:39:57,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6650 states. [2022-12-14 05:39:58,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6650 to 6263. [2022-12-14 05:39:58,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6263 states, 6262 states have (on average 1.4115298626636856) internal successors, (8839), 6262 states have internal predecessors, (8839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6263 states to 6263 states and 8839 transitions. [2022-12-14 05:39:58,794 INFO L78 Accepts]: Start accepts. Automaton has 6263 states and 8839 transitions. Word has length 67 [2022-12-14 05:39:58,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:58,794 INFO L495 AbstractCegarLoop]: Abstraction has 6263 states and 8839 transitions. [2022-12-14 05:39:58,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:58,795 INFO L276 IsEmpty]: Start isEmpty. Operand 6263 states and 8839 transitions. [2022-12-14 05:39:58,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 05:39:58,795 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:58,795 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:39:58,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 05:39:58,796 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:58,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:58,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1989262378, now seen corresponding path program 1 times [2022-12-14 05:39:58,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:58,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636358426] [2022-12-14 05:39:58,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:58,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:58,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:39:58,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:58,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636358426] [2022-12-14 05:39:58,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636358426] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:58,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:39:58,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:39:58,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637519069] [2022-12-14 05:39:58,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:58,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:39:58,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:58,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:39:58,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:39:58,847 INFO L87 Difference]: Start difference. First operand 6263 states and 8839 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:40:00,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:40:00,229 INFO L93 Difference]: Finished difference Result 11216 states and 15987 transitions. [2022-12-14 05:40:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:40:00,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-12-14 05:40:00,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:40:00,236 INFO L225 Difference]: With dead ends: 11216 [2022-12-14 05:40:00,236 INFO L226 Difference]: Without dead ends: 8086 [2022-12-14 05:40:00,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:40:00,239 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 75 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:40:00,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 319 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:40:00,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8086 states. [2022-12-14 05:40:01,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8086 to 7566. [2022-12-14 05:40:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7566 states, 7565 states have (on average 1.409120951751487) internal successors, (10660), 7565 states have internal predecessors, (10660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:40:01,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7566 states to 7566 states and 10660 transitions. [2022-12-14 05:40:01,491 INFO L78 Accepts]: Start accepts. Automaton has 7566 states and 10660 transitions. Word has length 70 [2022-12-14 05:40:01,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:40:01,491 INFO L495 AbstractCegarLoop]: Abstraction has 7566 states and 10660 transitions. [2022-12-14 05:40:01,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:40:01,491 INFO L276 IsEmpty]: Start isEmpty. Operand 7566 states and 10660 transitions. [2022-12-14 05:40:01,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 05:40:01,492 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:40:01,492 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:40:01,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-14 05:40:01,492 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:40:01,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:40:01,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1004828659, now seen corresponding path program 1 times [2022-12-14 05:40:01,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:40:01,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241973439] [2022-12-14 05:40:01,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:40:01,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:40:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:40:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:40:01,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:40:01,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241973439] [2022-12-14 05:40:01,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241973439] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:40:01,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:40:01,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:40:01,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824762097] [2022-12-14 05:40:01,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:40:01,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:40:01,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:40:01,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:40:01,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:40:01,548 INFO L87 Difference]: Start difference. First operand 7566 states and 10660 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:40:03,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:40:03,352 INFO L93 Difference]: Finished difference Result 15708 states and 22271 transitions. [2022-12-14 05:40:03,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:40:03,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-12-14 05:40:03,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:40:03,361 INFO L225 Difference]: With dead ends: 15708 [2022-12-14 05:40:03,362 INFO L226 Difference]: Without dead ends: 10466 [2022-12-14 05:40:03,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:40:03,366 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 70 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:40:03,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 300 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:40:03,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10466 states. [2022-12-14 05:40:04,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10466 to 9616. [2022-12-14 05:40:04,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9616 states, 9615 states have (on average 1.4022880915236609) internal successors, (13483), 9615 states have internal predecessors, (13483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:40:04,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9616 states to 9616 states and 13483 transitions. [2022-12-14 05:40:04,975 INFO L78 Accepts]: Start accepts. Automaton has 9616 states and 13483 transitions. Word has length 73 [2022-12-14 05:40:04,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:40:04,975 INFO L495 AbstractCegarLoop]: Abstraction has 9616 states and 13483 transitions. [2022-12-14 05:40:04,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:40:04,975 INFO L276 IsEmpty]: Start isEmpty. Operand 9616 states and 13483 transitions. [2022-12-14 05:40:04,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 05:40:04,976 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:40:04,976 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:40:04,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 05:40:04,976 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:40:04,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:40:04,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1025206190, now seen corresponding path program 1 times [2022-12-14 05:40:04,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:40:04,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255280177] [2022-12-14 05:40:04,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:40:04,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:40:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:40:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:40:05,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:40:05,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255280177] [2022-12-14 05:40:05,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255280177] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:40:05,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:40:05,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:40:05,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829941473] [2022-12-14 05:40:05,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:40:05,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:40:05,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:40:05,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:40:05,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:40:05,031 INFO L87 Difference]: Start difference. First operand 9616 states and 13483 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:40:07,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:40:07,509 INFO L93 Difference]: Finished difference Result 23237 states and 32688 transitions. [2022-12-14 05:40:07,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:40:07,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2022-12-14 05:40:07,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:40:07,523 INFO L225 Difference]: With dead ends: 23237 [2022-12-14 05:40:07,523 INFO L226 Difference]: Without dead ends: 13977 [2022-12-14 05:40:07,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:40:07,530 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 65 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:40:07,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 279 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:40:07,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13977 states. [2022-12-14 05:40:09,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13977 to 12817. [2022-12-14 05:40:09,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12817 states, 12816 states have (on average 1.392322097378277) internal successors, (17844), 12816 states have internal predecessors, (17844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:40:09,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12817 states to 12817 states and 17844 transitions. [2022-12-14 05:40:09,906 INFO L78 Accepts]: Start accepts. Automaton has 12817 states and 17844 transitions. Word has length 76 [2022-12-14 05:40:09,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:40:09,907 INFO L495 AbstractCegarLoop]: Abstraction has 12817 states and 17844 transitions. [2022-12-14 05:40:09,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:40:09,907 INFO L276 IsEmpty]: Start isEmpty. Operand 12817 states and 17844 transitions. [2022-12-14 05:40:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 05:40:09,909 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:40:09,909 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:40:09,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 05:40:09,909 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:40:09,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:40:09,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1782441348, now seen corresponding path program 1 times [2022-12-14 05:40:09,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:40:09,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464234718] [2022-12-14 05:40:09,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:40:09,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:40:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:40:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 05:40:10,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:40:10,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464234718] [2022-12-14 05:40:10,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464234718] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:40:10,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:40:10,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:40:10,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295982544] [2022-12-14 05:40:10,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:40:10,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:40:10,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:40:10,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:40:10,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:40:10,020 INFO L87 Difference]: Start difference. First operand 12817 states and 17844 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:40:17,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:40:17,519 INFO L93 Difference]: Finished difference Result 49988 states and 69382 transitions. [2022-12-14 05:40:17,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:40:17,520 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 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 92 [2022-12-14 05:40:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:40:17,564 INFO L225 Difference]: With dead ends: 49988 [2022-12-14 05:40:17,564 INFO L226 Difference]: Without dead ends: 37408 [2022-12-14 05:40:17,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:40:17,579 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 481 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:40:17,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 560 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:40:17,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37408 states. [2022-12-14 05:40:22,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37408 to 22725. [2022-12-14 05:40:22,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22725 states, 22724 states have (on average 1.36459250132019) internal successors, (31009), 22724 states have internal predecessors, (31009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:40:22,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22725 states to 22725 states and 31009 transitions. [2022-12-14 05:40:22,326 INFO L78 Accepts]: Start accepts. Automaton has 22725 states and 31009 transitions. Word has length 92 [2022-12-14 05:40:22,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:40:22,326 INFO L495 AbstractCegarLoop]: Abstraction has 22725 states and 31009 transitions. [2022-12-14 05:40:22,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:40:22,326 INFO L276 IsEmpty]: Start isEmpty. Operand 22725 states and 31009 transitions. [2022-12-14 05:40:22,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 05:40:22,329 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:40:22,329 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:40:22,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 05:40:22,330 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:40:22,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:40:22,330 INFO L85 PathProgramCache]: Analyzing trace with hash -895021057, now seen corresponding path program 1 times [2022-12-14 05:40:22,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:40:22,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107903662] [2022-12-14 05:40:22,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:40:22,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:40:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:40:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:40:23,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:40:23,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107903662] [2022-12-14 05:40:23,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107903662] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:40:23,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389715281] [2022-12-14 05:40:23,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:40:23,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:40:23,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74cec26-e8b3-441f-b13d-b47927fad828/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:40:23,306 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74cec26-e8b3-441f-b13d-b47927fad828/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:40:23,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a74cec26-e8b3-441f-b13d-b47927fad828/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 05:40:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:40:23,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 120 conjunts are in the unsatisfiable core [2022-12-14 05:40:23,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:40:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:40:29,420 INFO L328 TraceCheckSpWp]: Computing backward predicates...