./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem06_label28.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_974d7c98-82d2-4d15-a992-33a23a5661ad/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974d7c98-82d2-4d15-a992-33a23a5661ad/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974d7c98-82d2-4d15-a992-33a23a5661ad/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974d7c98-82d2-4d15-a992-33a23a5661ad/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem06_label28.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974d7c98-82d2-4d15-a992-33a23a5661ad/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974d7c98-82d2-4d15-a992-33a23a5661ad/bin/utaipan-6cKwYrpEi9 --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 bfe048977117829f0888074a3cb70602770cad05eadf6f0153cb9a847507ad78 --- 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-6b4ec56 [2022-11-20 21:19:39,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:19:39,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:19:39,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:19:39,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:19:39,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:19:39,809 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:19:39,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:19:39,813 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:19:39,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:19:39,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:19:39,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:19:39,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:19:39,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:19:39,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:19:39,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:19:39,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:19:39,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:19:39,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:19:39,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:19:39,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:19:39,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:19:39,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:19:39,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:19:39,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:19:39,855 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:19:39,855 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:19:39,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:19:39,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:19:39,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:19:39,858 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:19:39,859 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:19:39,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:19:39,861 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:19:39,862 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:19:39,863 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:19:39,864 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:19:39,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:19:39,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:19:39,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:19:39,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:19:39,868 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974d7c98-82d2-4d15-a992-33a23a5661ad/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 21:19:39,892 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:19:39,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:19:39,897 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:19:39,897 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:19:39,898 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:19:39,899 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:19:39,899 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:19:39,899 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:19:39,899 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:19:39,900 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:19:39,901 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:19:39,901 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:19:39,901 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:19:39,901 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:19:39,902 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:19:39,902 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:19:39,902 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:19:39,902 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:19:39,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:19:39,904 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:19:39,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:19:39,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:19:39,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:19:39,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 21:19:39,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:19:39,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 21:19:39,906 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:19:39,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 21:19:39,906 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:19:39,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 21:19:39,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:19:39,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:19:39,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:19:39,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:19:39,908 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:19:39,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:19:39,909 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 21:19:39,909 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:19:39,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:19:39,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 21:19:39,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:19:39,910 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_974d7c98-82d2-4d15-a992-33a23a5661ad/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974d7c98-82d2-4d15-a992-33a23a5661ad/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bfe048977117829f0888074a3cb70602770cad05eadf6f0153cb9a847507ad78 [2022-11-20 21:19:40,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:19:40,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:19:40,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:19:40,221 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:19:40,222 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:19:40,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974d7c98-82d2-4d15-a992-33a23a5661ad/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/eca-rers2012/Problem06_label28.c [2022-11-20 21:19:43,325 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:19:44,017 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:19:44,017 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974d7c98-82d2-4d15-a992-33a23a5661ad/sv-benchmarks/c/eca-rers2012/Problem06_label28.c [2022-11-20 21:19:44,062 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974d7c98-82d2-4d15-a992-33a23a5661ad/bin/utaipan-6cKwYrpEi9/data/e1e749e1e/d7270c77ff594a67aa147d52112d568e/FLAGebacf38c0 [2022-11-20 21:19:44,085 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974d7c98-82d2-4d15-a992-33a23a5661ad/bin/utaipan-6cKwYrpEi9/data/e1e749e1e/d7270c77ff594a67aa147d52112d568e [2022-11-20 21:19:44,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:19:44,095 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:19:44,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:19:44,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:19:44,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:19:44,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:19:44" (1/1) ... [2022-11-20 21:19:44,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1da159d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:19:44, skipping insertion in model container [2022-11-20 21:19:44,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:19:44" (1/1) ... [2022-11-20 21:19:44,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:19:44,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:19:46,339 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_974d7c98-82d2-4d15-a992-33a23a5661ad/sv-benchmarks/c/eca-rers2012/Problem06_label28.c[336548,336561] [2022-11-20 21:19:46,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:19:46,372 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:19:47,560 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_974d7c98-82d2-4d15-a992-33a23a5661ad/sv-benchmarks/c/eca-rers2012/Problem06_label28.c[336548,336561] [2022-11-20 21:19:47,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:19:47,624 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:19:47,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:19:47 WrapperNode [2022-11-20 21:19:47,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:19:47,626 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:19:47,626 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:19:47,627 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:19:47,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:19:47" (1/1) ... [2022-11-20 21:19:47,736 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:19:47" (1/1) ... [2022-11-20 21:19:48,268 INFO L138 Inliner]: procedures = 18, calls = 12, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 10173 [2022-11-20 21:19:48,269 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:19:48,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:19:48,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:19:48,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:19:48,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:19:47" (1/1) ... [2022-11-20 21:19:48,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:19:47" (1/1) ... [2022-11-20 21:19:48,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:19:47" (1/1) ... [2022-11-20 21:19:48,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:19:47" (1/1) ... [2022-11-20 21:19:48,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:19:47" (1/1) ... [2022-11-20 21:19:48,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:19:47" (1/1) ... [2022-11-20 21:19:48,628 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:19:47" (1/1) ... [2022-11-20 21:19:48,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:19:47" (1/1) ... [2022-11-20 21:19:48,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:19:48,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:19:48,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:19:48,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:19:48,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:19:47" (1/1) ... [2022-11-20 21:19:48,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:19:48,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974d7c98-82d2-4d15-a992-33a23a5661ad/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:19:48,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974d7c98-82d2-4d15-a992-33a23a5661ad/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:19:48,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974d7c98-82d2-4d15-a992-33a23a5661ad/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:19:48,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:19:48,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 21:19:48,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:19:48,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:19:49,082 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:19:49,084 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:19:56,373 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:19:57,603 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:19:57,603 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 21:19:57,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:19:57 BoogieIcfgContainer [2022-11-20 21:19:57,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:19:57,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:19:57,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:19:57,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:19:57,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:19:44" (1/3) ... [2022-11-20 21:19:57,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577be5f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:19:57, skipping insertion in model container [2022-11-20 21:19:57,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:19:47" (2/3) ... [2022-11-20 21:19:57,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577be5f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:19:57, skipping insertion in model container [2022-11-20 21:19:57,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:19:57" (3/3) ... [2022-11-20 21:19:57,617 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem06_label28.c [2022-11-20 21:19:57,637 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:19:57,638 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 21:19:57,713 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:19:57,720 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;@5765d676, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:19:57,720 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 21:19:57,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 938 states, 936 states have (on average 1.9914529914529915) internal successors, (1864), 937 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:57,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 930 [2022-11-20 21:19:57,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:19:57,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:19:57,787 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:19:57,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:19:57,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1670079041, now seen corresponding path program 1 times [2022-11-20 21:19:57,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:19:57,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086954756] [2022-11-20 21:19:57,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:57,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:19:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:00,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:20:00,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086954756] [2022-11-20 21:20:00,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086954756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:20:00,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:20:00,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:20:00,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962915622] [2022-11-20 21:20:00,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:20:00,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:20:00,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:20:00,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:20:00,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:20:00,680 INFO L87 Difference]: Start difference. First operand has 938 states, 936 states have (on average 1.9914529914529915) internal successors, (1864), 937 states have internal predecessors, (1864), 0 states have call successors, (0), 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 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 2 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:06,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:06,282 INFO L93 Difference]: Finished difference Result 2810 states and 5588 transitions. [2022-11-20 21:20:06,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:20:06,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 2 states have internal predecessors, (929), 0 states have call successors, (0), 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 929 [2022-11-20 21:20:06,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:06,314 INFO L225 Difference]: With dead ends: 2810 [2022-11-20 21:20:06,314 INFO L226 Difference]: Without dead ends: 1869 [2022-11-20 21:20:06,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:20:06,324 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 296 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2838 mSolverCounterSat, 954 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 3792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 954 IncrementalHoareTripleChecker+Valid, 2838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:06,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 340 Invalid, 3792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [954 Valid, 2838 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-20 21:20:06,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2022-11-20 21:20:06,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1869. [2022-11-20 21:20:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.791220556745182) internal successors, (3346), 1868 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:06,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 3346 transitions. [2022-11-20 21:20:06,455 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 3346 transitions. Word has length 929 [2022-11-20 21:20:06,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:06,457 INFO L495 AbstractCegarLoop]: Abstraction has 1869 states and 3346 transitions. [2022-11-20 21:20:06,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 2 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:06,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 3346 transitions. [2022-11-20 21:20:06,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 934 [2022-11-20 21:20:06,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:06,489 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:06,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 21:20:06,490 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:20:06,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:06,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1017610470, now seen corresponding path program 1 times [2022-11-20 21:20:06,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:20:06,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553641942] [2022-11-20 21:20:06,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:06,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:20:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:08,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:20:08,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553641942] [2022-11-20 21:20:08,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553641942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:20:08,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:20:08,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:20:08,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147398930] [2022-11-20 21:20:08,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:20:08,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:20:08,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:20:08,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:20:08,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:20:08,172 INFO L87 Difference]: Start difference. First operand 1869 states and 3346 transitions. Second operand has 3 states, 3 states have (on average 311.0) internal successors, (933), 2 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:10,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:10,496 INFO L93 Difference]: Finished difference Result 5605 states and 10036 transitions. [2022-11-20 21:20:10,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:20:10,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 311.0) internal successors, (933), 2 states have internal predecessors, (933), 0 states have call successors, (0), 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 933 [2022-11-20 21:20:10,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:10,511 INFO L225 Difference]: With dead ends: 5605 [2022-11-20 21:20:10,511 INFO L226 Difference]: Without dead ends: 3737 [2022-11-20 21:20:10,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:20:10,521 INFO L413 NwaCegarLoop]: 1243 mSDtfsCounter, 1697 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1697 SdHoareTripleChecker+Valid, 2400 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:10,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1697 Valid, 2400 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 21:20:10,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2022-11-20 21:20:10,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 3735. [2022-11-20 21:20:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3735 states, 3734 states have (on average 1.7868237814675951) internal successors, (6672), 3734 states have internal predecessors, (6672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:10,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3735 states to 3735 states and 6672 transitions. [2022-11-20 21:20:10,632 INFO L78 Accepts]: Start accepts. Automaton has 3735 states and 6672 transitions. Word has length 933 [2022-11-20 21:20:10,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:10,633 INFO L495 AbstractCegarLoop]: Abstraction has 3735 states and 6672 transitions. [2022-11-20 21:20:10,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 311.0) internal successors, (933), 2 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:10,634 INFO L276 IsEmpty]: Start isEmpty. Operand 3735 states and 6672 transitions. [2022-11-20 21:20:10,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2022-11-20 21:20:10,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:10,666 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:10,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 21:20:10,672 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:20:10,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:10,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1409638943, now seen corresponding path program 1 times [2022-11-20 21:20:10,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:20:10,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732812663] [2022-11-20 21:20:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:10,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:20:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:11,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:11,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:20:11,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732812663] [2022-11-20 21:20:11,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732812663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:20:11,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:20:11,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:20:11,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404451883] [2022-11-20 21:20:11,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:20:11,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:20:11,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:20:11,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:20:11,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:20:11,981 INFO L87 Difference]: Start difference. First operand 3735 states and 6672 transitions. Second operand has 3 states, 3 states have (on average 313.0) internal successors, (939), 2 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:17,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:17,399 INFO L93 Difference]: Finished difference Result 11201 states and 20013 transitions. [2022-11-20 21:20:17,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:20:17,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 313.0) internal successors, (939), 2 states have internal predecessors, (939), 0 states have call successors, (0), 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 939 [2022-11-20 21:20:17,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:17,431 INFO L225 Difference]: With dead ends: 11201 [2022-11-20 21:20:17,431 INFO L226 Difference]: Without dead ends: 7467 [2022-11-20 21:20:17,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:20:17,439 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 969 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 3042 mSolverCounterSat, 1094 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 4136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1094 IncrementalHoareTripleChecker+Valid, 3042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:17,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [969 Valid, 87 Invalid, 4136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1094 Valid, 3042 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-20 21:20:17,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7467 states. [2022-11-20 21:20:17,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7467 to 7467. [2022-11-20 21:20:17,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7467 states, 7466 states have (on average 1.7692204661130457) internal successors, (13209), 7466 states have internal predecessors, (13209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:17,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7467 states to 7467 states and 13209 transitions. [2022-11-20 21:20:17,678 INFO L78 Accepts]: Start accepts. Automaton has 7467 states and 13209 transitions. Word has length 939 [2022-11-20 21:20:17,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:17,679 INFO L495 AbstractCegarLoop]: Abstraction has 7467 states and 13209 transitions. [2022-11-20 21:20:17,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 313.0) internal successors, (939), 2 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:17,680 INFO L276 IsEmpty]: Start isEmpty. Operand 7467 states and 13209 transitions. [2022-11-20 21:20:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 946 [2022-11-20 21:20:17,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:17,712 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:17,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 21:20:17,713 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:20:17,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:17,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1805254399, now seen corresponding path program 1 times [2022-11-20 21:20:17,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:20:17,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383155108] [2022-11-20 21:20:17,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:17,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:20:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:18,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:20:18,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383155108] [2022-11-20 21:20:18,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383155108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:20:18,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:20:18,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:20:18,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676190621] [2022-11-20 21:20:18,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:20:18,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:20:18,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:20:18,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:20:18,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:20:18,998 INFO L87 Difference]: Start difference. First operand 7467 states and 13209 transitions. Second operand has 3 states, 3 states have (on average 315.0) internal successors, (945), 2 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:23,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:23,818 INFO L93 Difference]: Finished difference Result 22397 states and 39624 transitions. [2022-11-20 21:20:23,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:20:23,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 315.0) internal successors, (945), 2 states have internal predecessors, (945), 0 states have call successors, (0), 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 945 [2022-11-20 21:20:23,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:23,870 INFO L225 Difference]: With dead ends: 22397 [2022-11-20 21:20:23,870 INFO L226 Difference]: Without dead ends: 14931 [2022-11-20 21:20:23,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:20:23,882 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 1042 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 2931 mSolverCounterSat, 855 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1042 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 3786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 855 IncrementalHoareTripleChecker+Valid, 2931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:23,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1042 Valid, 452 Invalid, 3786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [855 Valid, 2931 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-20 21:20:23,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14931 states. [2022-11-20 21:20:24,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14931 to 14931. [2022-11-20 21:20:24,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14931 states, 14930 states have (on average 1.5857334226389819) internal successors, (23675), 14930 states have internal predecessors, (23675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:24,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14931 states to 14931 states and 23675 transitions. [2022-11-20 21:20:24,223 INFO L78 Accepts]: Start accepts. Automaton has 14931 states and 23675 transitions. Word has length 945 [2022-11-20 21:20:24,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:24,224 INFO L495 AbstractCegarLoop]: Abstraction has 14931 states and 23675 transitions. [2022-11-20 21:20:24,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 315.0) internal successors, (945), 2 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:24,225 INFO L276 IsEmpty]: Start isEmpty. Operand 14931 states and 23675 transitions. [2022-11-20 21:20:24,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 960 [2022-11-20 21:20:24,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:24,257 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:24,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 21:20:24,258 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:20:24,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:24,259 INFO L85 PathProgramCache]: Analyzing trace with hash 658170625, now seen corresponding path program 1 times [2022-11-20 21:20:24,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:20:24,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540496378] [2022-11-20 21:20:24,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:24,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:20:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 21:20:26,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:20:26,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540496378] [2022-11-20 21:20:26,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540496378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:20:26,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:20:26,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:20:26,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7251329] [2022-11-20 21:20:26,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:20:26,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:20:26,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:20:26,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:20:26,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:20:26,473 INFO L87 Difference]: Start difference. First operand 14931 states and 23675 transitions. Second operand has 3 states, 3 states have (on average 313.0) internal successors, (939), 2 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:31,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:31,797 INFO L93 Difference]: Finished difference Result 44791 states and 71023 transitions. [2022-11-20 21:20:31,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:20:31,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 313.0) internal successors, (939), 2 states have internal predecessors, (939), 0 states have call successors, (0), 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 959 [2022-11-20 21:20:31,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:31,859 INFO L225 Difference]: With dead ends: 44791 [2022-11-20 21:20:31,859 INFO L226 Difference]: Without dead ends: 29861 [2022-11-20 21:20:31,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:20:31,878 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 1114 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 3519 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 3997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 3519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:31,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1114 Valid, 665 Invalid, 3997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 3519 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-20 21:20:31,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29861 states. [2022-11-20 21:20:32,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29861 to 29859. [2022-11-20 21:20:32,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29859 states, 29858 states have (on average 1.476488713242682) internal successors, (44085), 29858 states have internal predecessors, (44085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:32,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29859 states to 29859 states and 44085 transitions. [2022-11-20 21:20:32,397 INFO L78 Accepts]: Start accepts. Automaton has 29859 states and 44085 transitions. Word has length 959 [2022-11-20 21:20:32,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:32,397 INFO L495 AbstractCegarLoop]: Abstraction has 29859 states and 44085 transitions. [2022-11-20 21:20:32,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 313.0) internal successors, (939), 2 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:32,398 INFO L276 IsEmpty]: Start isEmpty. Operand 29859 states and 44085 transitions. [2022-11-20 21:20:32,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 968 [2022-11-20 21:20:32,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:32,447 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:32,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 21:20:32,448 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:20:32,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:32,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1476310430, now seen corresponding path program 1 times [2022-11-20 21:20:32,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:20:32,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686270661] [2022-11-20 21:20:32,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:32,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:20:32,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 21:20:34,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:20:34,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686270661] [2022-11-20 21:20:34,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686270661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:20:34,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:20:34,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:20:34,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496050680] [2022-11-20 21:20:34,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:20:34,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:20:34,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:20:34,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:20:34,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:20:34,116 INFO L87 Difference]: Start difference. First operand 29859 states and 44085 transitions. Second operand has 3 states, 3 states have (on average 313.0) internal successors, (939), 2 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:38,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:38,633 INFO L93 Difference]: Finished difference Result 74645 states and 108777 transitions. [2022-11-20 21:20:38,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:20:38,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 313.0) internal successors, (939), 2 states have internal predecessors, (939), 0 states have call successors, (0), 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 967 [2022-11-20 21:20:38,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:38,735 INFO L225 Difference]: With dead ends: 74645 [2022-11-20 21:20:38,736 INFO L226 Difference]: Without dead ends: 44787 [2022-11-20 21:20:38,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:20:38,768 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 1052 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 2833 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1052 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 3473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 2833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:38,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1052 Valid, 549 Invalid, 3473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 2833 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-20 21:20:38,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44787 states. [2022-11-20 21:20:39,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44787 to 44787. [2022-11-20 21:20:39,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44787 states, 44786 states have (on average 1.4101058366453803) internal successors, (63153), 44786 states have internal predecessors, (63153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44787 states to 44787 states and 63153 transitions. [2022-11-20 21:20:39,641 INFO L78 Accepts]: Start accepts. Automaton has 44787 states and 63153 transitions. Word has length 967 [2022-11-20 21:20:39,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:39,641 INFO L495 AbstractCegarLoop]: Abstraction has 44787 states and 63153 transitions. [2022-11-20 21:20:39,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 313.0) internal successors, (939), 2 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:39,642 INFO L276 IsEmpty]: Start isEmpty. Operand 44787 states and 63153 transitions. [2022-11-20 21:20:39,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 976 [2022-11-20 21:20:39,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:39,697 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:39,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 21:20:39,698 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:20:39,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:39,699 INFO L85 PathProgramCache]: Analyzing trace with hash -599430315, now seen corresponding path program 1 times [2022-11-20 21:20:39,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:20:39,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922052988] [2022-11-20 21:20:39,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:39,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:20:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 21:20:41,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:20:41,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922052988] [2022-11-20 21:20:41,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922052988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:20:41,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:20:41,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:20:41,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117536951] [2022-11-20 21:20:41,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:20:41,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:20:41,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:20:41,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:20:41,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:20:41,741 INFO L87 Difference]: Start difference. First operand 44787 states and 63153 transitions. Second operand has 3 states, 3 states have (on average 317.0) internal successors, (951), 2 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:46,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:46,984 INFO L93 Difference]: Finished difference Result 129692 states and 182810 transitions. [2022-11-20 21:20:46,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:20:46,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 317.0) internal successors, (951), 2 states have internal predecessors, (951), 0 states have call successors, (0), 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 975 [2022-11-20 21:20:46,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:47,149 INFO L225 Difference]: With dead ends: 129692 [2022-11-20 21:20:47,149 INFO L226 Difference]: Without dead ends: 84906 [2022-11-20 21:20:47,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:20:47,187 INFO L413 NwaCegarLoop]: 544 mSDtfsCounter, 983 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 3343 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 3861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 3343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:47,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 568 Invalid, 3861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 3343 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-20 21:20:47,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84906 states. [2022-11-20 21:20:48,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84906 to 84906. [2022-11-20 21:20:48,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84906 states, 84905 states have (on average 1.3526882986867677) internal successors, (114850), 84905 states have internal predecessors, (114850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:48,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84906 states to 84906 states and 114850 transitions. [2022-11-20 21:20:48,642 INFO L78 Accepts]: Start accepts. Automaton has 84906 states and 114850 transitions. Word has length 975 [2022-11-20 21:20:48,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:48,642 INFO L495 AbstractCegarLoop]: Abstraction has 84906 states and 114850 transitions. [2022-11-20 21:20:48,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 317.0) internal successors, (951), 2 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:48,643 INFO L276 IsEmpty]: Start isEmpty. Operand 84906 states and 114850 transitions. [2022-11-20 21:20:48,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 978 [2022-11-20 21:20:48,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:48,719 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:48,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 21:20:48,720 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:20:48,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:48,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1471322344, now seen corresponding path program 1 times [2022-11-20 21:20:48,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:20:48,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581914706] [2022-11-20 21:20:48,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:48,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:20:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:49,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:20:49,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581914706] [2022-11-20 21:20:49,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581914706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:20:49,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:20:49,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:20:49,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573268797] [2022-11-20 21:20:49,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:20:49,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:20:49,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:20:49,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:20:49,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:20:49,728 INFO L87 Difference]: Start difference. First operand 84906 states and 114850 transitions. Second operand has 3 states, 3 states have (on average 325.6666666666667) internal successors, (977), 2 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:55,545 INFO L93 Difference]: Finished difference Result 239786 states and 325762 transitions. [2022-11-20 21:20:55,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:20:55,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 325.6666666666667) internal successors, (977), 2 states have internal predecessors, (977), 0 states have call successors, (0), 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 977 [2022-11-20 21:20:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:55,878 INFO L225 Difference]: With dead ends: 239786 [2022-11-20 21:20:55,878 INFO L226 Difference]: Without dead ends: 154881 [2022-11-20 21:20:55,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:20:55,962 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 1212 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 2616 mSolverCounterSat, 1202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 3818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1202 IncrementalHoareTripleChecker+Valid, 2616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:55,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1212 Valid, 400 Invalid, 3818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1202 Valid, 2616 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-20 21:20:56,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154881 states. [2022-11-20 21:20:58,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154881 to 154881. [2022-11-20 21:20:58,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154881 states, 154880 states have (on average 1.2727014462809918) internal successors, (197116), 154880 states have internal predecessors, (197116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:58,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154881 states to 154881 states and 197116 transitions. [2022-11-20 21:20:58,735 INFO L78 Accepts]: Start accepts. Automaton has 154881 states and 197116 transitions. Word has length 977 [2022-11-20 21:20:58,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:58,735 INFO L495 AbstractCegarLoop]: Abstraction has 154881 states and 197116 transitions. [2022-11-20 21:20:58,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 325.6666666666667) internal successors, (977), 2 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:58,736 INFO L276 IsEmpty]: Start isEmpty. Operand 154881 states and 197116 transitions. [2022-11-20 21:20:59,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 999 [2022-11-20 21:20:59,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:59,111 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:59,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 21:20:59,111 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:20:59,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:59,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1204732853, now seen corresponding path program 1 times [2022-11-20 21:20:59,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:20:59,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417932675] [2022-11-20 21:20:59,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:59,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:20:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 21:21:00,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:21:00,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417932675] [2022-11-20 21:21:00,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417932675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:21:00,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:21:00,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:21:00,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228934138] [2022-11-20 21:21:00,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:21:00,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:21:00,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:21:00,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:21:00,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:21:00,457 INFO L87 Difference]: Start difference. First operand 154881 states and 197116 transitions. Second operand has 3 states, 3 states have (on average 324.6666666666667) internal successors, (974), 2 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:21:06,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:21:06,243 INFO L93 Difference]: Finished difference Result 371341 states and 468395 transitions. [2022-11-20 21:21:06,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:21:06,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 324.6666666666667) internal successors, (974), 2 states have internal predecessors, (974), 0 states have call successors, (0), 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 998 [2022-11-20 21:21:06,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:21:06,509 INFO L225 Difference]: With dead ends: 371341 [2022-11-20 21:21:06,509 INFO L226 Difference]: Without dead ends: 216461 [2022-11-20 21:21:06,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:21:06,571 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 1169 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 3220 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 3416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 3220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:21:06,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1169 Valid, 423 Invalid, 3416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 3220 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-20 21:21:06,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216461 states. [2022-11-20 21:21:09,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216461 to 216459. [2022-11-20 21:21:09,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216459 states, 216458 states have (on average 1.2516192517717062) internal successors, (270923), 216458 states have internal predecessors, (270923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:21:09,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216459 states to 216459 states and 270923 transitions. [2022-11-20 21:21:09,875 INFO L78 Accepts]: Start accepts. Automaton has 216459 states and 270923 transitions. Word has length 998 [2022-11-20 21:21:09,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:09,876 INFO L495 AbstractCegarLoop]: Abstraction has 216459 states and 270923 transitions. [2022-11-20 21:21:09,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 324.6666666666667) internal successors, (974), 2 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:21:09,876 INFO L276 IsEmpty]: Start isEmpty. Operand 216459 states and 270923 transitions. [2022-11-20 21:21:10,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1003 [2022-11-20 21:21:10,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:10,559 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:21:10,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 21:21:10,560 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:21:10,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:10,561 INFO L85 PathProgramCache]: Analyzing trace with hash 560824913, now seen corresponding path program 1 times [2022-11-20 21:21:10,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:21:10,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120007429] [2022-11-20 21:21:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:10,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:21:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-20 21:21:12,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:21:12,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120007429] [2022-11-20 21:21:12,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120007429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:21:12,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:21:12,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:21:12,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876684823] [2022-11-20 21:21:12,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:21:12,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:21:12,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:21:12,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:21:12,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:21:12,372 INFO L87 Difference]: Start difference. First operand 216459 states and 270923 transitions. Second operand has 3 states, 3 states have (on average 319.3333333333333) internal successors, (958), 2 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:21:20,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:21:20,240 INFO L93 Difference]: Finished difference Result 605524 states and 756782 transitions. [2022-11-20 21:21:20,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:21:20,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 319.3333333333333) internal successors, (958), 2 states have internal predecessors, (958), 0 states have call successors, (0), 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 1002 [2022-11-20 21:21:20,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:21:20,801 INFO L225 Difference]: With dead ends: 605524 [2022-11-20 21:21:20,801 INFO L226 Difference]: Without dead ends: 389066 [2022-11-20 21:21:20,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:21:20,922 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 1088 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 3265 mSolverCounterSat, 665 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1088 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 3930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 665 IncrementalHoareTripleChecker+Valid, 3265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:21:20,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1088 Valid, 436 Invalid, 3930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [665 Valid, 3265 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-20 21:21:21,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389066 states. [2022-11-20 21:21:26,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389066 to 389064. [2022-11-20 21:21:26,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389064 states, 389063 states have (on average 1.2270968969035863) internal successors, (477418), 389063 states have internal predecessors, (477418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:21:27,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389064 states to 389064 states and 477418 transitions. [2022-11-20 21:21:27,305 INFO L78 Accepts]: Start accepts. Automaton has 389064 states and 477418 transitions. Word has length 1002 [2022-11-20 21:21:27,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:27,305 INFO L495 AbstractCegarLoop]: Abstraction has 389064 states and 477418 transitions. [2022-11-20 21:21:27,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.3333333333333) internal successors, (958), 2 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:21:27,305 INFO L276 IsEmpty]: Start isEmpty. Operand 389064 states and 477418 transitions. [2022-11-20 21:21:28,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1010 [2022-11-20 21:21:28,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:28,419 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:21:28,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 21:21:28,428 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:21:28,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:28,429 INFO L85 PathProgramCache]: Analyzing trace with hash -124169761, now seen corresponding path program 1 times [2022-11-20 21:21:28,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:21:28,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364411994] [2022-11-20 21:21:28,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:28,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:21:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 21:21:30,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:21:30,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364411994] [2022-11-20 21:21:30,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364411994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:21:30,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:21:30,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:21:30,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756840337] [2022-11-20 21:21:30,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:21:30,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:21:30,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:21:30,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:21:30,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:21:30,487 INFO L87 Difference]: Start difference. First operand 389064 states and 477418 transitions. Second operand has 3 states, 3 states have (on average 328.3333333333333) internal successors, (985), 2 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)