./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6e28c81ffc5a1b93c1edca1581014bee1ba1c062c6df3b7a8a783721ae21bc12 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 08:51:39,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:51:39,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:51:39,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:51:39,908 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:51:39,909 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:51:39,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:51:39,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:51:39,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:51:39,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:51:39,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:51:39,916 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:51:39,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:51:39,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:51:39,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:51:39,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:51:39,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:51:39,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:51:39,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:51:39,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:51:39,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:51:39,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:51:39,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:51:39,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:51:39,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:51:39,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:51:39,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:51:39,933 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:51:39,933 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:51:39,934 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:51:39,934 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:51:39,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:51:39,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:51:39,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:51:39,937 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:51:39,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:51:39,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:51:39,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:51:39,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:51:39,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:51:39,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:51:39,940 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:51:39,959 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:51:39,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:51:39,960 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:51:39,960 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:51:39,961 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:51:39,961 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:51:39,961 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:51:39,961 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:51:39,961 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:51:39,962 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:51:39,962 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:51:39,962 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:51:39,962 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:51:39,962 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:51:39,962 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:51:39,963 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:51:39,963 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:51:39,963 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:51:39,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:51:39,964 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:51:39,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:51:39,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:51:39,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:51:39,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:51:39,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:51:39,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:51:39,965 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:51:39,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:51:39,965 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:51:39,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:51:39,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:51:39,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:51:39,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:51:39,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:51:39,966 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:51:39,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:51:39,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:51:39,967 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:51:39,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:51:39,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:51:39,968 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:51:39,968 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_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e28c81ffc5a1b93c1edca1581014bee1ba1c062c6df3b7a8a783721ae21bc12 [2022-12-14 08:51:40,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:51:40,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:51:40,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:51:40,204 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:51:40,205 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:51:40,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c [2022-12-14 08:51:42,852 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:51:43,271 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:51:43,271 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c [2022-12-14 08:51:43,301 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/data/c5aaeac96/42caaa01433141a388759e8f722fb7d8/FLAG6ff77ed8f [2022-12-14 08:51:43,311 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/data/c5aaeac96/42caaa01433141a388759e8f722fb7d8 [2022-12-14 08:51:43,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:51:43,314 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:51:43,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:51:43,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:51:43,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:51:43,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:51:43" (1/1) ... [2022-12-14 08:51:43,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe6e2bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:51:43, skipping insertion in model container [2022-12-14 08:51:43,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:51:43" (1/1) ... [2022-12-14 08:51:43,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:51:43,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:51:44,804 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_9dee75d1-3d6f-4669-8961-af4fb9606d70/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c[378560,378573] [2022-12-14 08:51:44,826 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_9dee75d1-3d6f-4669-8961-af4fb9606d70/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c[383339,383352] [2022-12-14 08:51:44,944 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:51:44,951 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:51:45,788 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_9dee75d1-3d6f-4669-8961-af4fb9606d70/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c[378560,378573] [2022-12-14 08:51:45,794 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_9dee75d1-3d6f-4669-8961-af4fb9606d70/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c[383339,383352] [2022-12-14 08:51:45,800 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:51:45,837 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:51:45,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:51:45 WrapperNode [2022-12-14 08:51:45,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:51:45,838 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:51:45,838 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:51:45,839 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:51:45,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:51:45" (1/1) ... [2022-12-14 08:51:45,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:51:45" (1/1) ... [2022-12-14 08:51:46,141 INFO L138 Inliner]: procedures = 48, calls = 47, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 12619 [2022-12-14 08:51:46,142 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:51:46,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:51:46,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:51:46,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:51:46,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:51:45" (1/1) ... [2022-12-14 08:51:46,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:51:45" (1/1) ... [2022-12-14 08:51:46,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:51:45" (1/1) ... [2022-12-14 08:51:46,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:51:45" (1/1) ... [2022-12-14 08:51:46,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:51:45" (1/1) ... [2022-12-14 08:51:46,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:51:45" (1/1) ... [2022-12-14 08:51:46,352 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:51:45" (1/1) ... [2022-12-14 08:51:46,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:51:45" (1/1) ... [2022-12-14 08:51:46,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:51:46,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:51:46,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:51:46,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:51:46,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:51:45" (1/1) ... [2022-12-14 08:51:46,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:51:46,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:51:46,427 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:51:46,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:51:46,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:51:46,461 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 08:51:46,461 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 08:51:46,461 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 08:51:46,461 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 08:51:46,461 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 08:51:46,461 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 08:51:46,461 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 08:51:46,461 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 08:51:46,461 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 08:51:46,461 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 08:51:46,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:51:46,462 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 08:51:46,462 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 08:51:46,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:51:46,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:51:46,544 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:51:46,546 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:51:52,036 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:51:53,224 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:51:53,224 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-14 08:51:53,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:51:53 BoogieIcfgContainer [2022-12-14 08:51:53,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:51:53,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:51:53,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:51:53,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:51:53,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:51:43" (1/3) ... [2022-12-14 08:51:53,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7baf25c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:51:53, skipping insertion in model container [2022-12-14 08:51:53,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:51:45" (2/3) ... [2022-12-14 08:51:53,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7baf25c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:51:53, skipping insertion in model container [2022-12-14 08:51:53,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:51:53" (3/3) ... [2022-12-14 08:51:53,234 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.02.cil-1.c [2022-12-14 08:51:53,251 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:51:53,252 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 08:51:53,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:51:53,326 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;@3fd764a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:51:53,326 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 08:51:53,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 1721 states, 1696 states have (on average 1.977004716981132) internal successors, (3353), 1699 states have internal predecessors, (3353), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-14 08:51:53,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 08:51:53,340 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:51:53,341 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] [2022-12-14 08:51:53,341 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:51:53,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:51:53,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1622723667, now seen corresponding path program 1 times [2022-12-14 08:51:53,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:51:53,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255983544] [2022-12-14 08:51:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:53,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:51:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:51:53,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:51:53,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255983544] [2022-12-14 08:51:53,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255983544] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:51:53,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:51:53,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:51:53,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897353926] [2022-12-14 08:51:53,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:51:53,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:51:53,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:51:53,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:51:53,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:51:53,667 INFO L87 Difference]: Start difference. First operand has 1721 states, 1696 states have (on average 1.977004716981132) internal successors, (3353), 1699 states have internal predecessors, (3353), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 08:51:54,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:51:54,320 INFO L93 Difference]: Finished difference Result 3503 states and 6867 transitions. [2022-12-14 08:51:54,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:51:54,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-12-14 08:51:54,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:51:54,337 INFO L225 Difference]: With dead ends: 3503 [2022-12-14 08:51:54,337 INFO L226 Difference]: Without dead ends: 1781 [2022-12-14 08:51:54,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:51:54,345 INFO L413 NwaCegarLoop]: 3211 mSDtfsCounter, 3449 mSDsluCounter, 3153 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3449 SdHoareTripleChecker+Valid, 6364 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:51:54,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3449 Valid, 6364 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:51:54,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2022-12-14 08:51:54,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1780. [2022-12-14 08:51:54,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1738 states have (on average 1.9562715765247412) internal successors, (3400), 1741 states have internal predecessors, (3400), 28 states have call successors, (28), 12 states have call predecessors, (28), 12 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-12-14 08:51:54,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 3456 transitions. [2022-12-14 08:51:54,427 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 3456 transitions. Word has length 37 [2022-12-14 08:51:54,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:51:54,427 INFO L495 AbstractCegarLoop]: Abstraction has 1780 states and 3456 transitions. [2022-12-14 08:51:54,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 08:51:54,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 3456 transitions. [2022-12-14 08:51:54,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 08:51:54,429 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:51:54,429 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 08:51:54,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:51:54,430 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:51:54,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:51:54,430 INFO L85 PathProgramCache]: Analyzing trace with hash 759854832, now seen corresponding path program 1 times [2022-12-14 08:51:54,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:51:54,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337311997] [2022-12-14 08:51:54,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:54,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:51:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:51:54,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:51:54,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337311997] [2022-12-14 08:51:54,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337311997] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:51:54,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000018986] [2022-12-14 08:51:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:54,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:51:54,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:51:54,526 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:51:54,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:51:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:54,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:51:54,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:51:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:51:54,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:51:54,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000018986] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:51:54,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:51:54,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:51:54,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346101937] [2022-12-14 08:51:54,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:51:54,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:51:54,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:51:54,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:51:54,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:51:54,660 INFO L87 Difference]: Start difference. First operand 1780 states and 3456 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:51:55,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:51:55,002 INFO L93 Difference]: Finished difference Result 2041 states and 3815 transitions. [2022-12-14 08:51:55,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:51:55,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-12-14 08:51:55,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:51:55,011 INFO L225 Difference]: With dead ends: 2041 [2022-12-14 08:51:55,011 INFO L226 Difference]: Without dead ends: 1907 [2022-12-14 08:51:55,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:51:55,013 INFO L413 NwaCegarLoop]: 3173 mSDtfsCounter, 3348 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3348 SdHoareTripleChecker+Valid, 3248 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:51:55,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3348 Valid, 3248 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:51:55,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2022-12-14 08:51:55,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1903. [2022-12-14 08:51:55,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1827 states have (on average 1.9250136836343732) internal successors, (3517), 1831 states have internal predecessors, (3517), 50 states have call successors, (50), 24 states have call predecessors, (50), 24 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2022-12-14 08:51:55,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 3617 transitions. [2022-12-14 08:51:55,052 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 3617 transitions. Word has length 66 [2022-12-14 08:51:55,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:51:55,053 INFO L495 AbstractCegarLoop]: Abstraction has 1903 states and 3617 transitions. [2022-12-14 08:51:55,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:51:55,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 3617 transitions. [2022-12-14 08:51:55,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 08:51:55,055 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:51:55,055 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 08:51:55,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:51:55,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:51:55,256 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:51:55,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:51:55,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2114671504, now seen corresponding path program 1 times [2022-12-14 08:51:55,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:51:55,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079742365] [2022-12-14 08:51:55,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:55,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:51:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 08:51:55,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:51:55,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079742365] [2022-12-14 08:51:55,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079742365] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:51:55,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:51:55,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:51:55,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329630724] [2022-12-14 08:51:55,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:51:55,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:51:55,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:51:55,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:51:55,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:51:55,496 INFO L87 Difference]: Start difference. First operand 1903 states and 3617 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:51:56,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:51:56,280 INFO L93 Difference]: Finished difference Result 2443 states and 4338 transitions. [2022-12-14 08:51:56,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:51:56,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 66 [2022-12-14 08:51:56,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:51:56,291 INFO L225 Difference]: With dead ends: 2443 [2022-12-14 08:51:56,291 INFO L226 Difference]: Without dead ends: 2187 [2022-12-14 08:51:56,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:51:56,293 INFO L413 NwaCegarLoop]: 3150 mSDtfsCounter, 3512 mSDsluCounter, 9338 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3523 SdHoareTripleChecker+Valid, 12488 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:51:56,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3523 Valid, 12488 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:51:56,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2022-12-14 08:51:56,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2133. [2022-12-14 08:51:56,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2133 states, 1991 states have (on average 1.8719236564540431) internal successors, (3727), 1997 states have internal predecessors, (3727), 92 states have call successors, (92), 48 states have call predecessors, (92), 48 states have return successors, (92), 88 states have call predecessors, (92), 92 states have call successors, (92) [2022-12-14 08:51:56,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 3911 transitions. [2022-12-14 08:51:56,345 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 3911 transitions. Word has length 66 [2022-12-14 08:51:56,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:51:56,345 INFO L495 AbstractCegarLoop]: Abstraction has 2133 states and 3911 transitions. [2022-12-14 08:51:56,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:51:56,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 3911 transitions. [2022-12-14 08:51:56,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 08:51:56,347 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:51:56,347 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 08:51:56,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 08:51:56,348 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:51:56,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:51:56,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1125441191, now seen corresponding path program 1 times [2022-12-14 08:51:56,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:51:56,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139418275] [2022-12-14 08:51:56,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:56,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:51:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 08:51:56,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:51:56,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139418275] [2022-12-14 08:51:56,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139418275] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:51:56,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:51:56,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:51:56,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573519960] [2022-12-14 08:51:56,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:51:56,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:51:56,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:51:56,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:51:56,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:51:56,510 INFO L87 Difference]: Start difference. First operand 2133 states and 3911 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:51:57,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:51:57,245 INFO L93 Difference]: Finished difference Result 2871 states and 4883 transitions. [2022-12-14 08:51:57,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:51:57,246 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 67 [2022-12-14 08:51:57,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:51:57,253 INFO L225 Difference]: With dead ends: 2871 [2022-12-14 08:51:57,253 INFO L226 Difference]: Without dead ends: 2385 [2022-12-14 08:51:57,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:51:57,256 INFO L413 NwaCegarLoop]: 3154 mSDtfsCounter, 3476 mSDsluCounter, 9348 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3482 SdHoareTripleChecker+Valid, 12502 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:51:57,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3482 Valid, 12502 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:51:57,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2022-12-14 08:51:57,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 2359. [2022-12-14 08:51:57,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 2151 states have (on average 1.8256624825662482) internal successors, (3927), 2159 states have internal predecessors, (3927), 134 states have call successors, (134), 72 states have call predecessors, (134), 72 states have return successors, (134), 128 states have call predecessors, (134), 134 states have call successors, (134) [2022-12-14 08:51:57,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 4195 transitions. [2022-12-14 08:51:57,327 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 4195 transitions. Word has length 67 [2022-12-14 08:51:57,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:51:57,328 INFO L495 AbstractCegarLoop]: Abstraction has 2359 states and 4195 transitions. [2022-12-14 08:51:57,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:51:57,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 4195 transitions. [2022-12-14 08:51:57,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 08:51:57,329 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:51:57,330 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 08:51:57,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 08:51:57,330 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:51:57,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:51:57,330 INFO L85 PathProgramCache]: Analyzing trace with hash -682234900, now seen corresponding path program 1 times [2022-12-14 08:51:57,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:51:57,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098133244] [2022-12-14 08:51:57,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:57,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:51:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 08:51:57,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:51:57,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098133244] [2022-12-14 08:51:57,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098133244] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:51:57,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:51:57,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:51:57,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238413666] [2022-12-14 08:51:57,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:51:57,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:51:57,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:51:57,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:51:57,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:51:57,374 INFO L87 Difference]: Start difference. First operand 2359 states and 4195 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 08:51:57,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:51:57,762 INFO L93 Difference]: Finished difference Result 2904 states and 4905 transitions. [2022-12-14 08:51:57,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:51:57,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 68 [2022-12-14 08:51:57,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:51:57,770 INFO L225 Difference]: With dead ends: 2904 [2022-12-14 08:51:57,770 INFO L226 Difference]: Without dead ends: 2532 [2022-12-14 08:51:57,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:51:57,772 INFO L413 NwaCegarLoop]: 3180 mSDtfsCounter, 35 mSDsluCounter, 3142 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 6322 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:51:57,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 6322 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:51:57,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2022-12-14 08:51:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2439. [2022-12-14 08:51:57,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2439 states, 2219 states have (on average 1.8138801261829653) internal successors, (4025), 2227 states have internal predecessors, (4025), 140 states have call successors, (140), 78 states have call predecessors, (140), 78 states have return successors, (140), 134 states have call predecessors, (140), 140 states have call successors, (140) [2022-12-14 08:51:57,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2439 states to 2439 states and 4305 transitions. [2022-12-14 08:51:57,870 INFO L78 Accepts]: Start accepts. Automaton has 2439 states and 4305 transitions. Word has length 68 [2022-12-14 08:51:57,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:51:57,871 INFO L495 AbstractCegarLoop]: Abstraction has 2439 states and 4305 transitions. [2022-12-14 08:51:57,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 08:51:57,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2439 states and 4305 transitions. [2022-12-14 08:51:57,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 08:51:57,873 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:51:57,874 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 08:51:57,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 08:51:57,874 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:51:57,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:51:57,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1558315946, now seen corresponding path program 1 times [2022-12-14 08:51:57,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:51:57,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479621417] [2022-12-14 08:51:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:57,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:51:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 08:51:57,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:51:57,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479621417] [2022-12-14 08:51:57,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479621417] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:51:57,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:51:57,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:51:57,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925955157] [2022-12-14 08:51:57,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:51:57,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:51:57,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:51:57,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:51:57,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:51:57,922 INFO L87 Difference]: Start difference. First operand 2439 states and 4305 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 08:51:58,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:51:58,303 INFO L93 Difference]: Finished difference Result 3626 states and 5863 transitions. [2022-12-14 08:51:58,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:51:58,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 87 [2022-12-14 08:51:58,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:51:58,312 INFO L225 Difference]: With dead ends: 3626 [2022-12-14 08:51:58,313 INFO L226 Difference]: Without dead ends: 2833 [2022-12-14 08:51:58,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:51:58,316 INFO L413 NwaCegarLoop]: 3174 mSDtfsCounter, 3341 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3341 SdHoareTripleChecker+Valid, 3249 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:51:58,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3341 Valid, 3249 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:51:58,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2022-12-14 08:51:58,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2822. [2022-12-14 08:51:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2822 states, 2498 states have (on average 1.7502001601281025) internal successors, (4372), 2509 states have internal predecessors, (4372), 205 states have call successors, (205), 117 states have call predecessors, (205), 117 states have return successors, (205), 196 states have call predecessors, (205), 205 states have call successors, (205) [2022-12-14 08:51:58,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2822 states to 2822 states and 4782 transitions. [2022-12-14 08:51:58,465 INFO L78 Accepts]: Start accepts. Automaton has 2822 states and 4782 transitions. Word has length 87 [2022-12-14 08:51:58,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:51:58,465 INFO L495 AbstractCegarLoop]: Abstraction has 2822 states and 4782 transitions. [2022-12-14 08:51:58,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 08:51:58,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2822 states and 4782 transitions. [2022-12-14 08:51:58,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 08:51:58,470 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:51:58,470 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 08:51:58,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 08:51:58,470 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:51:58,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:51:58,471 INFO L85 PathProgramCache]: Analyzing trace with hash -743085551, now seen corresponding path program 1 times [2022-12-14 08:51:58,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:51:58,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204157111] [2022-12-14 08:51:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:58,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:51:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 08:51:58,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:51:58,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204157111] [2022-12-14 08:51:58,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204157111] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:51:58,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550982919] [2022-12-14 08:51:58,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:58,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:51:58,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:51:58,556 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:51:58,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:51:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:58,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:51:58,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:51:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:51:58,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:51:58,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550982919] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:51:58,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:51:58,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 08:51:58,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815257506] [2022-12-14 08:51:58,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:51:58,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:51:58,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:51:58,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:51:58,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:51:58,666 INFO L87 Difference]: Start difference. First operand 2822 states and 4782 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 08:51:59,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:51:59,024 INFO L93 Difference]: Finished difference Result 3874 states and 6153 transitions. [2022-12-14 08:51:59,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:51:59,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 101 [2022-12-14 08:51:59,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:51:59,032 INFO L225 Difference]: With dead ends: 3874 [2022-12-14 08:51:59,033 INFO L226 Difference]: Without dead ends: 3088 [2022-12-14 08:51:59,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:51:59,035 INFO L413 NwaCegarLoop]: 3188 mSDtfsCounter, 50 mSDsluCounter, 3144 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 6332 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:51:59,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 6332 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:51:59,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2022-12-14 08:51:59,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 2927. [2022-12-14 08:51:59,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2585 states have (on average 1.7388781431334623) internal successors, (4495), 2596 states have internal predecessors, (4495), 214 states have call successors, (214), 126 states have call predecessors, (214), 126 states have return successors, (214), 205 states have call predecessors, (214), 214 states have call successors, (214) [2022-12-14 08:51:59,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 4923 transitions. [2022-12-14 08:51:59,109 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 4923 transitions. Word has length 101 [2022-12-14 08:51:59,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:51:59,109 INFO L495 AbstractCegarLoop]: Abstraction has 2927 states and 4923 transitions. [2022-12-14 08:51:59,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 08:51:59,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 4923 transitions. [2022-12-14 08:51:59,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 08:51:59,112 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:51:59,112 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 08:51:59,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:51:59,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:51:59,313 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:51:59,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:51:59,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1025766268, now seen corresponding path program 2 times [2022-12-14 08:51:59,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:51:59,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135184741] [2022-12-14 08:51:59,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:59,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:51:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 08:51:59,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:51:59,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135184741] [2022-12-14 08:51:59,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135184741] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:51:59,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88113676] [2022-12-14 08:51:59,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:51:59,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:51:59,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:51:59,542 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:51:59,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:51:59,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:51:59,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:51:59,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 08:51:59,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:51:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 08:51:59,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:52:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 08:52:00,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88113676] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:00,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:52:00,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 7] total 14 [2022-12-14 08:52:00,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897238745] [2022-12-14 08:52:00,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:52:00,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:52:00,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:00,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:52:00,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 08:52:00,104 INFO L87 Difference]: Start difference. First operand 2927 states and 4923 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 08:52:00,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:00,628 INFO L93 Difference]: Finished difference Result 4210 states and 6617 transitions. [2022-12-14 08:52:00,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:52:00,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2022-12-14 08:52:00,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:00,641 INFO L225 Difference]: With dead ends: 4210 [2022-12-14 08:52:00,641 INFO L226 Difference]: Without dead ends: 3319 [2022-12-14 08:52:00,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 08:52:00,644 INFO L413 NwaCegarLoop]: 3171 mSDtfsCounter, 3356 mSDsluCounter, 3156 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3356 SdHoareTripleChecker+Valid, 6327 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:00,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3356 Valid, 6327 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:52:00,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2022-12-14 08:52:00,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 3255. [2022-12-14 08:52:00,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 2877 states have (on average 1.686131386861314) internal successors, (4851), 2888 states have internal predecessors, (4851), 220 states have call successors, (220), 156 states have call predecessors, (220), 156 states have return successors, (236), 211 states have call predecessors, (236), 220 states have call successors, (236) [2022-12-14 08:52:00,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 5307 transitions. [2022-12-14 08:52:00,736 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 5307 transitions. Word has length 101 [2022-12-14 08:52:00,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:00,737 INFO L495 AbstractCegarLoop]: Abstraction has 3255 states and 5307 transitions. [2022-12-14 08:52:00,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 08:52:00,737 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 5307 transitions. [2022-12-14 08:52:00,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 08:52:00,739 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:00,740 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:00,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:52:00,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 08:52:00,940 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:00,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:00,941 INFO L85 PathProgramCache]: Analyzing trace with hash 448608268, now seen corresponding path program 1 times [2022-12-14 08:52:00,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:00,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951902782] [2022-12-14 08:52:00,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:00,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 08:52:01,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:01,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951902782] [2022-12-14 08:52:01,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951902782] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:01,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252512048] [2022-12-14 08:52:01,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:01,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:01,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:01,008 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:52:01,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:52:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:01,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:52:01,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:52:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:52:01,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:52:01,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252512048] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:52:01,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:52:01,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 08:52:01,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656534559] [2022-12-14 08:52:01,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:52:01,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:52:01,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:01,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:52:01,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:52:01,121 INFO L87 Difference]: Start difference. First operand 3255 states and 5307 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 08:52:01,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:01,522 INFO L93 Difference]: Finished difference Result 4699 states and 7181 transitions. [2022-12-14 08:52:01,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:52:01,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 100 [2022-12-14 08:52:01,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:01,545 INFO L225 Difference]: With dead ends: 4699 [2022-12-14 08:52:01,545 INFO L226 Difference]: Without dead ends: 3582 [2022-12-14 08:52:01,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:52:01,548 INFO L413 NwaCegarLoop]: 3180 mSDtfsCounter, 43 mSDsluCounter, 3144 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 6324 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:01,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 6324 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:52:01,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3582 states. [2022-12-14 08:52:01,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3582 to 3392. [2022-12-14 08:52:01,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3392 states, 2990 states have (on average 1.6755852842809364) internal successors, (5010), 3001 states have internal predecessors, (5010), 232 states have call successors, (232), 168 states have call predecessors, (232), 168 states have return successors, (248), 223 states have call predecessors, (248), 232 states have call successors, (248) [2022-12-14 08:52:01,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3392 states to 3392 states and 5490 transitions. [2022-12-14 08:52:01,680 INFO L78 Accepts]: Start accepts. Automaton has 3392 states and 5490 transitions. Word has length 100 [2022-12-14 08:52:01,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:01,680 INFO L495 AbstractCegarLoop]: Abstraction has 3392 states and 5490 transitions. [2022-12-14 08:52:01,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 08:52:01,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3392 states and 5490 transitions. [2022-12-14 08:52:01,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 08:52:01,683 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:01,683 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:01,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 08:52:01,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 08:52:01,884 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:01,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:01,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1458097850, now seen corresponding path program 2 times [2022-12-14 08:52:01,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:01,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196077810] [2022-12-14 08:52:01,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:01,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:01,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 08:52:02,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:02,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196077810] [2022-12-14 08:52:02,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196077810] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:02,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932734219] [2022-12-14 08:52:02,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:52:02,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:02,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:02,098 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:52:02,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:52:02,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 08:52:02,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:52:02,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:52:02,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:52:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 08:52:02,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:52:02,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932734219] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:52:02,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:52:02,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 08:52:02,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507587005] [2022-12-14 08:52:02,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:52:02,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:52:02,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:02,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:52:02,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:52:02,187 INFO L87 Difference]: Start difference. First operand 3392 states and 5490 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 08:52:02,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:02,583 INFO L93 Difference]: Finished difference Result 4654 states and 7185 transitions. [2022-12-14 08:52:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:52:02,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 100 [2022-12-14 08:52:02,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:02,597 INFO L225 Difference]: With dead ends: 4654 [2022-12-14 08:52:02,597 INFO L226 Difference]: Without dead ends: 3400 [2022-12-14 08:52:02,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:52:02,602 INFO L413 NwaCegarLoop]: 3193 mSDtfsCounter, 84 mSDsluCounter, 3132 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 6325 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:02,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 6325 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:52:02,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2022-12-14 08:52:02,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3380. [2022-12-14 08:52:02,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3380 states, 2978 states have (on average 1.6601746138347884) internal successors, (4944), 2989 states have internal predecessors, (4944), 232 states have call successors, (232), 168 states have call predecessors, (232), 168 states have return successors, (248), 223 states have call predecessors, (248), 232 states have call successors, (248) [2022-12-14 08:52:02,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3380 states to 3380 states and 5424 transitions. [2022-12-14 08:52:02,705 INFO L78 Accepts]: Start accepts. Automaton has 3380 states and 5424 transitions. Word has length 100 [2022-12-14 08:52:02,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:02,705 INFO L495 AbstractCegarLoop]: Abstraction has 3380 states and 5424 transitions. [2022-12-14 08:52:02,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 08:52:02,705 INFO L276 IsEmpty]: Start isEmpty. Operand 3380 states and 5424 transitions. [2022-12-14 08:52:02,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 08:52:02,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:02,708 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:02,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 08:52:02,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 08:52:02,909 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:02,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:02,911 INFO L85 PathProgramCache]: Analyzing trace with hash 528739354, now seen corresponding path program 1 times [2022-12-14 08:52:02,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:02,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867784032] [2022-12-14 08:52:02,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:02,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 08:52:03,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:03,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867784032] [2022-12-14 08:52:03,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867784032] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:03,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950579445] [2022-12-14 08:52:03,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:03,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:03,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:03,054 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:52:03,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:52:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:03,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:52:03,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:52:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 08:52:03,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:52:03,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950579445] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:52:03,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:52:03,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 08:52:03,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323535620] [2022-12-14 08:52:03,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:52:03,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:52:03,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:03,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:52:03,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:52:03,161 INFO L87 Difference]: Start difference. First operand 3380 states and 5424 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 08:52:03,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:03,528 INFO L93 Difference]: Finished difference Result 4822 states and 7231 transitions. [2022-12-14 08:52:03,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:52:03,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 100 [2022-12-14 08:52:03,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:03,535 INFO L225 Difference]: With dead ends: 4822 [2022-12-14 08:52:03,535 INFO L226 Difference]: Without dead ends: 3629 [2022-12-14 08:52:03,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:52:03,538 INFO L413 NwaCegarLoop]: 3148 mSDtfsCounter, 3351 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3351 SdHoareTripleChecker+Valid, 3166 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:03,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3351 Valid, 3166 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:52:03,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2022-12-14 08:52:03,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 3629. [2022-12-14 08:52:03,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3629 states, 3197 states have (on average 1.6158898967782296) internal successors, (5166), 3208 states have internal predecessors, (5166), 238 states have call successors, (238), 192 states have call predecessors, (238), 192 states have return successors, (254), 229 states have call predecessors, (254), 238 states have call successors, (254) [2022-12-14 08:52:03,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 5658 transitions. [2022-12-14 08:52:03,685 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 5658 transitions. Word has length 100 [2022-12-14 08:52:03,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:03,685 INFO L495 AbstractCegarLoop]: Abstraction has 3629 states and 5658 transitions. [2022-12-14 08:52:03,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 08:52:03,686 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 5658 transitions. [2022-12-14 08:52:03,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 08:52:03,689 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:03,690 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:03,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 08:52:03,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 08:52:03,891 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:03,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:03,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1862687555, now seen corresponding path program 1 times [2022-12-14 08:52:03,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:03,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448569259] [2022-12-14 08:52:03,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:03,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:04,048 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 08:52:04,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:04,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448569259] [2022-12-14 08:52:04,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448569259] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:04,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712584790] [2022-12-14 08:52:04,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:04,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:04,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:04,050 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:52:04,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 08:52:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:04,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:52:04,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:52:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 08:52:04,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:52:04,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712584790] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:52:04,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:52:04,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 08:52:04,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230817716] [2022-12-14 08:52:04,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:52:04,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:52:04,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:04,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:52:04,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:52:04,148 INFO L87 Difference]: Start difference. First operand 3629 states and 5658 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 08:52:04,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:04,548 INFO L93 Difference]: Finished difference Result 4993 states and 7391 transitions. [2022-12-14 08:52:04,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:52:04,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 100 [2022-12-14 08:52:04,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:04,557 INFO L225 Difference]: With dead ends: 4993 [2022-12-14 08:52:04,557 INFO L226 Difference]: Without dead ends: 3613 [2022-12-14 08:52:04,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:52:04,561 INFO L413 NwaCegarLoop]: 3201 mSDtfsCounter, 71 mSDsluCounter, 3131 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 6332 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:04,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 6332 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:52:04,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2022-12-14 08:52:04,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 3593. [2022-12-14 08:52:04,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3593 states, 3165 states have (on average 1.6018957345971565) internal successors, (5070), 3172 states have internal predecessors, (5070), 238 states have call successors, (238), 192 states have call predecessors, (238), 188 states have return successors, (250), 229 states have call predecessors, (250), 238 states have call successors, (250) [2022-12-14 08:52:04,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 5558 transitions. [2022-12-14 08:52:04,697 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 5558 transitions. Word has length 100 [2022-12-14 08:52:04,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:04,697 INFO L495 AbstractCegarLoop]: Abstraction has 3593 states and 5558 transitions. [2022-12-14 08:52:04,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 08:52:04,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 5558 transitions. [2022-12-14 08:52:04,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 08:52:04,700 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:04,700 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:04,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 08:52:04,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 08:52:04,900 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:04,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:04,901 INFO L85 PathProgramCache]: Analyzing trace with hash -835024943, now seen corresponding path program 1 times [2022-12-14 08:52:04,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:04,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686120571] [2022-12-14 08:52:04,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:04,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 08:52:05,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:05,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686120571] [2022-12-14 08:52:05,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686120571] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:05,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171103768] [2022-12-14 08:52:05,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:05,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:05,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:05,042 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:52:05,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 08:52:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:05,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:52:05,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:52:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 08:52:05,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:52:05,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171103768] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:52:05,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:52:05,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 08:52:05,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330384340] [2022-12-14 08:52:05,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:52:05,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:52:05,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:05,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:52:05,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:52:05,138 INFO L87 Difference]: Start difference. First operand 3593 states and 5558 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 08:52:05,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:05,601 INFO L93 Difference]: Finished difference Result 6244 states and 8732 transitions. [2022-12-14 08:52:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:52:05,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2022-12-14 08:52:05,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:05,611 INFO L225 Difference]: With dead ends: 6244 [2022-12-14 08:52:05,612 INFO L226 Difference]: Without dead ends: 4298 [2022-12-14 08:52:05,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:52:05,617 INFO L413 NwaCegarLoop]: 3160 mSDtfsCounter, 39 mSDsluCounter, 3134 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 6294 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:05,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 6294 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:52:05,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2022-12-14 08:52:05,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 3781. [2022-12-14 08:52:05,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3781 states, 3317 states have (on average 1.587579137775098) internal successors, (5266), 3325 states have internal predecessors, (5266), 256 states have call successors, (256), 210 states have call predecessors, (256), 206 states have return successors, (268), 246 states have call predecessors, (268), 256 states have call successors, (268) [2022-12-14 08:52:05,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3781 states to 3781 states and 5790 transitions. [2022-12-14 08:52:05,824 INFO L78 Accepts]: Start accepts. Automaton has 3781 states and 5790 transitions. Word has length 101 [2022-12-14 08:52:05,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:05,825 INFO L495 AbstractCegarLoop]: Abstraction has 3781 states and 5790 transitions. [2022-12-14 08:52:05,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 08:52:05,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3781 states and 5790 transitions. [2022-12-14 08:52:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 08:52:05,827 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:05,827 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:05,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 08:52:06,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:06,028 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:06,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:06,028 INFO L85 PathProgramCache]: Analyzing trace with hash -609586558, now seen corresponding path program 1 times [2022-12-14 08:52:06,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:06,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530417904] [2022-12-14 08:52:06,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:06,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 08:52:06,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:06,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530417904] [2022-12-14 08:52:06,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530417904] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:06,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616718025] [2022-12-14 08:52:06,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:06,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:06,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:06,137 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:52:06,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 08:52:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:06,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:52:06,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:52:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 08:52:06,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:52:06,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616718025] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:52:06,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:52:06,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-12-14 08:52:06,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692077886] [2022-12-14 08:52:06,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:52:06,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:52:06,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:06,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:52:06,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:52:06,286 INFO L87 Difference]: Start difference. First operand 3781 states and 5790 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 08:52:06,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:06,776 INFO L93 Difference]: Finished difference Result 5455 states and 7797 transitions. [2022-12-14 08:52:06,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:52:06,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 102 [2022-12-14 08:52:06,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:06,784 INFO L225 Difference]: With dead ends: 5455 [2022-12-14 08:52:06,784 INFO L226 Difference]: Without dead ends: 4358 [2022-12-14 08:52:06,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:52:06,787 INFO L413 NwaCegarLoop]: 3198 mSDtfsCounter, 6649 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6649 SdHoareTripleChecker+Valid, 3273 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:06,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6649 Valid, 3273 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:52:06,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4358 states. [2022-12-14 08:52:06,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4358 to 4037. [2022-12-14 08:52:06,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4037 states, 3538 states have (on average 1.5542679479932164) internal successors, (5499), 3552 states have internal predecessors, (5499), 268 states have call successors, (268), 229 states have call predecessors, (268), 229 states have return successors, (285), 256 states have call predecessors, (285), 268 states have call successors, (285) [2022-12-14 08:52:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4037 states to 4037 states and 6052 transitions. [2022-12-14 08:52:06,934 INFO L78 Accepts]: Start accepts. Automaton has 4037 states and 6052 transitions. Word has length 102 [2022-12-14 08:52:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:06,934 INFO L495 AbstractCegarLoop]: Abstraction has 4037 states and 6052 transitions. [2022-12-14 08:52:06,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 08:52:06,935 INFO L276 IsEmpty]: Start isEmpty. Operand 4037 states and 6052 transitions. [2022-12-14 08:52:06,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 08:52:06,937 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:06,937 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:06,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 08:52:07,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 08:52:07,138 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:07,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:07,138 INFO L85 PathProgramCache]: Analyzing trace with hash 2111071834, now seen corresponding path program 1 times [2022-12-14 08:52:07,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:07,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412944147] [2022-12-14 08:52:07,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:07,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 08:52:07,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:07,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412944147] [2022-12-14 08:52:07,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412944147] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:52:07,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:52:07,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:52:07,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087580579] [2022-12-14 08:52:07,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:52:07,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:52:07,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:07,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:52:07,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:52:07,264 INFO L87 Difference]: Start difference. First operand 4037 states and 6052 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 08:52:08,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:08,032 INFO L93 Difference]: Finished difference Result 6219 states and 8611 transitions. [2022-12-14 08:52:08,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:52:08,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2022-12-14 08:52:08,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:08,041 INFO L225 Difference]: With dead ends: 6219 [2022-12-14 08:52:08,041 INFO L226 Difference]: Without dead ends: 4913 [2022-12-14 08:52:08,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:52:08,044 INFO L413 NwaCegarLoop]: 3186 mSDtfsCounter, 73 mSDsluCounter, 9372 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 12558 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:08,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 12558 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:52:08,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4913 states. [2022-12-14 08:52:08,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4913 to 4811. [2022-12-14 08:52:08,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4125 states have (on average 1.4926060606060607) internal successors, (6157), 4150 states have internal predecessors, (6157), 368 states have call successors, (368), 311 states have call predecessors, (368), 316 states have return successors, (419), 350 states have call predecessors, (419), 368 states have call successors, (419) [2022-12-14 08:52:08,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 6944 transitions. [2022-12-14 08:52:08,243 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 6944 transitions. Word has length 103 [2022-12-14 08:52:08,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:08,243 INFO L495 AbstractCegarLoop]: Abstraction has 4811 states and 6944 transitions. [2022-12-14 08:52:08,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 08:52:08,243 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 6944 transitions. [2022-12-14 08:52:08,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 08:52:08,246 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:08,246 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:08,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 08:52:08,246 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:08,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:08,247 INFO L85 PathProgramCache]: Analyzing trace with hash 937619450, now seen corresponding path program 1 times [2022-12-14 08:52:08,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:08,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445271915] [2022-12-14 08:52:08,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:08,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:08,341 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 08:52:08,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:08,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445271915] [2022-12-14 08:52:08,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445271915] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:08,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632962455] [2022-12-14 08:52:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:08,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:08,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:08,343 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:52:08,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 08:52:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:08,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 08:52:08,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:52:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:52:08,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:52:08,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632962455] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:52:08,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:52:08,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-12-14 08:52:08,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85978089] [2022-12-14 08:52:08,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:52:08,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:52:08,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:08,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:52:08,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:52:08,484 INFO L87 Difference]: Start difference. First operand 4811 states and 6944 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 08:52:09,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:09,257 INFO L93 Difference]: Finished difference Result 7904 states and 10557 transitions. [2022-12-14 08:52:09,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:52:09,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 103 [2022-12-14 08:52:09,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:09,266 INFO L225 Difference]: With dead ends: 7904 [2022-12-14 08:52:09,266 INFO L226 Difference]: Without dead ends: 5713 [2022-12-14 08:52:09,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:52:09,270 INFO L413 NwaCegarLoop]: 3186 mSDtfsCounter, 161 mSDsluCounter, 9316 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 12502 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:09,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 12502 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:52:09,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5713 states. [2022-12-14 08:52:09,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5713 to 5463. [2022-12-14 08:52:09,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5463 states, 4630 states have (on average 1.451403887688985) internal successors, (6720), 4658 states have internal predecessors, (6720), 452 states have call successors, (452), 377 states have call predecessors, (452), 379 states have return successors, (524), 428 states have call predecessors, (524), 452 states have call successors, (524) [2022-12-14 08:52:09,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 7696 transitions. [2022-12-14 08:52:09,514 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 7696 transitions. Word has length 103 [2022-12-14 08:52:09,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:09,514 INFO L495 AbstractCegarLoop]: Abstraction has 5463 states and 7696 transitions. [2022-12-14 08:52:09,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 08:52:09,514 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 7696 transitions. [2022-12-14 08:52:09,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 08:52:09,517 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:09,517 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 08:52:09,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 08:52:09,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 08:52:09,718 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:09,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:09,719 INFO L85 PathProgramCache]: Analyzing trace with hash -773955189, now seen corresponding path program 1 times [2022-12-14 08:52:09,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:09,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379666578] [2022-12-14 08:52:09,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:09,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:10,058 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 08:52:10,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:10,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379666578] [2022-12-14 08:52:10,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379666578] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:10,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910216927] [2022-12-14 08:52:10,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:10,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:10,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:10,059 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:52:10,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 08:52:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:10,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 08:52:10,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:52:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:52:10,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:52:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 08:52:10,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910216927] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:52:10,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2087645276] [2022-12-14 08:52:10,345 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-12-14 08:52:10,345 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:52:10,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:52:10,353 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:52:10,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:52:17,420 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 179 for LOIs [2022-12-14 08:52:19,259 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 209 for LOIs [2022-12-14 08:52:20,235 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 185 for LOIs [2022-12-14 08:52:20,277 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 67 for LOIs [2022-12-14 08:52:20,283 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 76 for LOIs [2022-12-14 08:52:20,400 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 67 for LOIs [2022-12-14 08:52:20,790 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:52:38,560 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '157124#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~a25~0 1) (not (= ~token~0 (+ 2 ~local~0))) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (= 0 ~t2_pc~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a27~0 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (= |#NULL.base| 0))' at error location [2022-12-14 08:52:38,560 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:52:38,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:52:38,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 6] total 20 [2022-12-14 08:52:38,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076952356] [2022-12-14 08:52:38,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:52:38,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 08:52:38,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:38,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 08:52:38,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=4081, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 08:52:38,564 INFO L87 Difference]: Start difference. First operand 5463 states and 7696 transitions. Second operand has 20 states, 16 states have (on average 8.1875) internal successors, (131), 18 states have internal predecessors, (131), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-12-14 08:52:41,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:41,251 INFO L93 Difference]: Finished difference Result 8490 states and 11322 transitions. [2022-12-14 08:52:41,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-14 08:52:41,252 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 8.1875) internal successors, (131), 18 states have internal predecessors, (131), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 109 [2022-12-14 08:52:41,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:41,257 INFO L225 Difference]: With dead ends: 8490 [2022-12-14 08:52:41,257 INFO L226 Difference]: Without dead ends: 4668 [2022-12-14 08:52:41,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 303 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5506 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=864, Invalid=12708, Unknown=0, NotChecked=0, Total=13572 [2022-12-14 08:52:41,263 INFO L413 NwaCegarLoop]: 3239 mSDtfsCounter, 7243 mSDsluCounter, 35300 mSDsCounter, 0 mSdLazyCounter, 4374 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7254 SdHoareTripleChecker+Valid, 38539 SdHoareTripleChecker+Invalid, 4631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 4374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:41,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7254 Valid, 38539 Invalid, 4631 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [257 Valid, 4374 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 08:52:41,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2022-12-14 08:52:41,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 4026. [2022-12-14 08:52:41,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 3532 states have (on average 1.5461494903737258) internal successors, (5461), 3547 states have internal predecessors, (5461), 258 states have call successors, (258), 234 states have call predecessors, (258), 234 states have return successors, (286), 244 states have call predecessors, (286), 258 states have call successors, (286) [2022-12-14 08:52:41,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 6005 transitions. [2022-12-14 08:52:41,431 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 6005 transitions. Word has length 109 [2022-12-14 08:52:41,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:41,431 INFO L495 AbstractCegarLoop]: Abstraction has 4026 states and 6005 transitions. [2022-12-14 08:52:41,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 8.1875) internal successors, (131), 18 states have internal predecessors, (131), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-12-14 08:52:41,431 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 6005 transitions. [2022-12-14 08:52:41,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 08:52:41,433 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:41,433 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 08:52:41,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 08:52:41,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 08:52:41,634 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:41,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1976571679, now seen corresponding path program 1 times [2022-12-14 08:52:41,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:41,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426563901] [2022-12-14 08:52:41,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:41,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 08:52:41,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:41,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426563901] [2022-12-14 08:52:41,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426563901] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:41,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105390999] [2022-12-14 08:52:41,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:41,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:41,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:41,918 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:52:41,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 08:52:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:41,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 08:52:41,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:52:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:52:42,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:52:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 08:52:42,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105390999] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:52:42,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [255918916] [2022-12-14 08:52:42,236 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-12-14 08:52:42,236 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:52:42,236 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:52:42,236 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:52:42,236 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:52:48,141 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 180 for LOIs [2022-12-14 08:52:50,136 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 210 for LOIs [2022-12-14 08:52:53,292 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 186 for LOIs [2022-12-14 08:52:53,334 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 68 for LOIs [2022-12-14 08:52:53,340 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 120 for LOIs [2022-12-14 08:52:53,479 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 111 for LOIs [2022-12-14 08:52:53,742 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:53:00,203 WARN L233 SmtUtils]: Spent 5.27s on a formula simplification. DAG size of input: 346 DAG size of output: 264 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:53:16,170 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '174203#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (= ~a25~0 1) (not (= ~token~0 (+ 2 ~local~0))) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (= 0 ~t2_pc~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a27~0 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-12-14 08:53:16,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:53:16,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:53:16,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 6] total 21 [2022-12-14 08:53:16,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488083208] [2022-12-14 08:53:16,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:53:16,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 08:53:16,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:53:16,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 08:53:16,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=4880, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 08:53:16,174 INFO L87 Difference]: Start difference. First operand 4026 states and 6005 transitions. Second operand has 21 states, 17 states have (on average 8.235294117647058) internal successors, (140), 19 states have internal predecessors, (140), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-12-14 08:53:19,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:53:19,008 INFO L93 Difference]: Finished difference Result 5965 states and 8281 transitions. [2022-12-14 08:53:19,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-12-14 08:53:19,009 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 8.235294117647058) internal successors, (140), 19 states have internal predecessors, (140), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 112 [2022-12-14 08:53:19,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:53:19,014 INFO L225 Difference]: With dead ends: 5965 [2022-12-14 08:53:19,015 INFO L226 Difference]: Without dead ends: 3728 [2022-12-14 08:53:19,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 308 SyntacticMatches, 4 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7733 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=1071, Invalid=17289, Unknown=0, NotChecked=0, Total=18360 [2022-12-14 08:53:19,021 INFO L413 NwaCegarLoop]: 3216 mSDtfsCounter, 10354 mSDsluCounter, 38132 mSDsCounter, 0 mSdLazyCounter, 4515 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10367 SdHoareTripleChecker+Valid, 41348 SdHoareTripleChecker+Invalid, 4770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 4515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:53:19,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10367 Valid, 41348 Invalid, 4770 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [255 Valid, 4515 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 08:53:19,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2022-12-14 08:53:19,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 3347. [2022-12-14 08:53:19,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3347 states, 2997 states have (on average 1.6106106106106106) internal successors, (4827), 3007 states have internal predecessors, (4827), 180 states have call successors, (180), 168 states have call predecessors, (180), 168 states have return successors, (202), 171 states have call predecessors, (202), 180 states have call successors, (202) [2022-12-14 08:53:19,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3347 states to 3347 states and 5209 transitions. [2022-12-14 08:53:19,151 INFO L78 Accepts]: Start accepts. Automaton has 3347 states and 5209 transitions. Word has length 112 [2022-12-14 08:53:19,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:53:19,152 INFO L495 AbstractCegarLoop]: Abstraction has 3347 states and 5209 transitions. [2022-12-14 08:53:19,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 8.235294117647058) internal successors, (140), 19 states have internal predecessors, (140), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-12-14 08:53:19,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3347 states and 5209 transitions. [2022-12-14 08:53:19,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 08:53:19,153 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:53:19,153 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 08:53:19,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 08:53:19,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 08:53:19,355 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:53:19,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:53:19,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1606582122, now seen corresponding path program 1 times [2022-12-14 08:53:19,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:53:19,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072497579] [2022-12-14 08:53:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:53:19,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:53:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:53:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 08:53:19,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:53:19,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072497579] [2022-12-14 08:53:19,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072497579] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:53:19,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741076698] [2022-12-14 08:53:19,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:53:19,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:53:19,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:53:19,711 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:53:19,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 08:53:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:53:19,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 08:53:19,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:53:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:53:20,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:53:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 08:53:20,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741076698] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:53:20,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1077924203] [2022-12-14 08:53:20,614 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-12-14 08:53:20,615 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:53:20,615 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:53:20,615 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:53:20,615 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:53:28,353 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 181 for LOIs [2022-12-14 08:53:28,749 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 211 for LOIs [2022-12-14 08:53:30,700 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 187 for LOIs [2022-12-14 08:53:30,743 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 69 for LOIs [2022-12-14 08:53:30,750 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 78 for LOIs [2022-12-14 08:53:30,831 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 69 for LOIs [2022-12-14 08:53:31,143 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:53:49,849 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '186789#(and (= ~a15~0 1) (<= ~t1_pc~0 1) (= 5 ~a20~0) (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (= ~a25~0 1) (not (= ~token~0 (+ 2 ~local~0))) (<= 0 (+ ~local~0 2147483648)) (<= 0 ~t2_pc~0) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= 5 ~e~0) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~a27~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-12-14 08:53:49,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:53:49,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:53:49,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 14] total 39 [2022-12-14 08:53:49,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33146002] [2022-12-14 08:53:49,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:53:49,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 08:53:49,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:53:49,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 08:53:49,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=654, Invalid=7718, Unknown=0, NotChecked=0, Total=8372 [2022-12-14 08:53:49,852 INFO L87 Difference]: Start difference. First operand 3347 states and 5209 transitions. Second operand has 39 states, 27 states have (on average 7.2592592592592595) internal successors, (196), 30 states have internal predecessors, (196), 17 states have call successors, (44), 12 states have call predecessors, (44), 19 states have return successors, (44), 17 states have call predecessors, (44), 17 states have call successors, (44) [2022-12-14 08:54:00,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:54:00,862 INFO L93 Difference]: Finished difference Result 7184 states and 9747 transitions. [2022-12-14 08:54:00,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-12-14 08:54:00,862 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 27 states have (on average 7.2592592592592595) internal successors, (196), 30 states have internal predecessors, (196), 17 states have call successors, (44), 12 states have call predecessors, (44), 19 states have return successors, (44), 17 states have call predecessors, (44), 17 states have call successors, (44) Word has length 114 [2022-12-14 08:54:00,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:54:00,868 INFO L225 Difference]: With dead ends: 7184 [2022-12-14 08:54:00,868 INFO L226 Difference]: Without dead ends: 5782 [2022-12-14 08:54:00,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 306 SyntacticMatches, 16 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25518 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=6140, Invalid=55116, Unknown=0, NotChecked=0, Total=61256 [2022-12-14 08:54:00,875 INFO L413 NwaCegarLoop]: 3169 mSDtfsCounter, 32137 mSDsluCounter, 41365 mSDsCounter, 0 mSdLazyCounter, 9037 mSolverCounterSat, 2299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32137 SdHoareTripleChecker+Valid, 44534 SdHoareTripleChecker+Invalid, 11336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2299 IncrementalHoareTripleChecker+Valid, 9037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-12-14 08:54:00,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32137 Valid, 44534 Invalid, 11336 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2299 Valid, 9037 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-12-14 08:54:00,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5782 states. [2022-12-14 08:54:01,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5782 to 3481. [2022-12-14 08:54:01,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3481 states, 3079 states have (on average 1.5940240337772005) internal successors, (4908), 3095 states have internal predecessors, (4908), 211 states have call successors, (211), 189 states have call predecessors, (211), 189 states have return successors, (211), 196 states have call predecessors, (211), 211 states have call successors, (211) [2022-12-14 08:54:01,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3481 states to 3481 states and 5330 transitions. [2022-12-14 08:54:01,096 INFO L78 Accepts]: Start accepts. Automaton has 3481 states and 5330 transitions. Word has length 114 [2022-12-14 08:54:01,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:54:01,096 INFO L495 AbstractCegarLoop]: Abstraction has 3481 states and 5330 transitions. [2022-12-14 08:54:01,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 27 states have (on average 7.2592592592592595) internal successors, (196), 30 states have internal predecessors, (196), 17 states have call successors, (44), 12 states have call predecessors, (44), 19 states have return successors, (44), 17 states have call predecessors, (44), 17 states have call successors, (44) [2022-12-14 08:54:01,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3481 states and 5330 transitions. [2022-12-14 08:54:01,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 08:54:01,098 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:54:01,098 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:54:01,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 08:54:01,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:54:01,300 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:54:01,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:54:01,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1432083084, now seen corresponding path program 1 times [2022-12-14 08:54:01,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:54:01,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753783433] [2022-12-14 08:54:01,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:54:01,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:54:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:54:01,431 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 08:54:01,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:54:01,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753783433] [2022-12-14 08:54:01,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753783433] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:54:01,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:54:01,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:54:01,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710915118] [2022-12-14 08:54:01,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:54:01,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:54:01,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:54:01,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:54:01,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:54:01,433 INFO L87 Difference]: Start difference. First operand 3481 states and 5330 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 08:54:02,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:54:02,395 INFO L93 Difference]: Finished difference Result 6014 states and 8211 transitions. [2022-12-14 08:54:02,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:54:02,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 127 [2022-12-14 08:54:02,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:54:02,400 INFO L225 Difference]: With dead ends: 6014 [2022-12-14 08:54:02,401 INFO L226 Difference]: Without dead ends: 5095 [2022-12-14 08:54:02,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:54:02,402 INFO L413 NwaCegarLoop]: 3278 mSDtfsCounter, 3494 mSDsluCounter, 6430 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3494 SdHoareTripleChecker+Valid, 9708 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:54:02,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3494 Valid, 9708 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:54:02,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5095 states. [2022-12-14 08:54:02,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5095 to 4130. [2022-12-14 08:54:02,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4130 states, 3580 states have (on average 1.5329608938547485) internal successors, (5488), 3600 states have internal predecessors, (5488), 291 states have call successors, (291), 257 states have call predecessors, (291), 257 states have return successors, (291), 272 states have call predecessors, (291), 291 states have call successors, (291) [2022-12-14 08:54:02,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4130 states to 4130 states and 6070 transitions. [2022-12-14 08:54:02,689 INFO L78 Accepts]: Start accepts. Automaton has 4130 states and 6070 transitions. Word has length 127 [2022-12-14 08:54:02,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:54:02,689 INFO L495 AbstractCegarLoop]: Abstraction has 4130 states and 6070 transitions. [2022-12-14 08:54:02,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 08:54:02,689 INFO L276 IsEmpty]: Start isEmpty. Operand 4130 states and 6070 transitions. [2022-12-14 08:54:02,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 08:54:02,691 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:54:02,691 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-12-14 08:54:02,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 08:54:02,691 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:54:02,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:54:02,691 INFO L85 PathProgramCache]: Analyzing trace with hash -641817154, now seen corresponding path program 1 times [2022-12-14 08:54:02,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:54:02,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087850856] [2022-12-14 08:54:02,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:54:02,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:54:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:54:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 72 proven. 11 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-12-14 08:54:02,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:54:02,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087850856] [2022-12-14 08:54:02,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087850856] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:54:02,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550605609] [2022-12-14 08:54:02,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:54:02,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:54:02,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:54:02,769 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:54:02,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 08:54:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:54:02,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 08:54:02,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:54:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 08:54:02,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:54:02,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550605609] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:54:02,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:54:02,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-12-14 08:54:02,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863151890] [2022-12-14 08:54:02,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:54:02,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:54:02,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:54:02,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:54:02,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:54:02,889 INFO L87 Difference]: Start difference. First operand 4130 states and 6070 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 08:54:03,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:54:03,564 INFO L93 Difference]: Finished difference Result 6283 states and 8478 transitions. [2022-12-14 08:54:03,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:54:03,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 158 [2022-12-14 08:54:03,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:54:03,569 INFO L225 Difference]: With dead ends: 6283 [2022-12-14 08:54:03,569 INFO L226 Difference]: Without dead ends: 4153 [2022-12-14 08:54:03,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:54:03,571 INFO L413 NwaCegarLoop]: 3210 mSDtfsCounter, 3336 mSDsluCounter, 3278 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3336 SdHoareTripleChecker+Valid, 6488 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:54:03,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3336 Valid, 6488 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:54:03,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2022-12-14 08:54:03,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 4070. [2022-12-14 08:54:03,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4070 states, 3528 states have (on average 1.522108843537415) internal successors, (5370), 3549 states have internal predecessors, (5370), 289 states have call successors, (289), 251 states have call predecessors, (289), 251 states have return successors, (289), 269 states have call predecessors, (289), 289 states have call successors, (289) [2022-12-14 08:54:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4070 states to 4070 states and 5948 transitions. [2022-12-14 08:54:03,857 INFO L78 Accepts]: Start accepts. Automaton has 4070 states and 5948 transitions. Word has length 158 [2022-12-14 08:54:03,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:54:03,857 INFO L495 AbstractCegarLoop]: Abstraction has 4070 states and 5948 transitions. [2022-12-14 08:54:03,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 08:54:03,858 INFO L276 IsEmpty]: Start isEmpty. Operand 4070 states and 5948 transitions. [2022-12-14 08:54:03,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 08:54:03,859 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:54:03,859 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 08:54:03,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 08:54:04,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 08:54:04,061 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:54:04,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:54:04,062 INFO L85 PathProgramCache]: Analyzing trace with hash 205581519, now seen corresponding path program 1 times [2022-12-14 08:54:04,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:54:04,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219282462] [2022-12-14 08:54:04,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:54:04,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:54:04,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:54:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 36 proven. 32 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-12-14 08:54:04,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:54:04,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219282462] [2022-12-14 08:54:04,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219282462] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:54:04,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610286701] [2022-12-14 08:54:04,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:54:04,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:54:04,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:54:04,153 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:54:04,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 08:54:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:54:04,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 08:54:04,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:54:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-12-14 08:54:04,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:54:04,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610286701] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:54:04,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:54:04,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-12-14 08:54:04,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131732328] [2022-12-14 08:54:04,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:54:04,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:54:04,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:54:04,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:54:04,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:54:04,267 INFO L87 Difference]: Start difference. First operand 4070 states and 5948 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 08:54:04,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:54:04,757 INFO L93 Difference]: Finished difference Result 5084 states and 7047 transitions. [2022-12-14 08:54:04,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:54:04,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 159 [2022-12-14 08:54:04,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:54:04,761 INFO L225 Difference]: With dead ends: 5084 [2022-12-14 08:54:04,761 INFO L226 Difference]: Without dead ends: 3063 [2022-12-14 08:54:04,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:54:04,764 INFO L413 NwaCegarLoop]: 3179 mSDtfsCounter, 3320 mSDsluCounter, 3254 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3320 SdHoareTripleChecker+Valid, 6433 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:54:04,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3320 Valid, 6433 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:54:04,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3063 states. [2022-12-14 08:54:04,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3063 to 3000. [2022-12-14 08:54:04,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3000 states, 2703 states have (on average 1.6403995560488347) internal successors, (4434), 2715 states have internal predecessors, (4434), 157 states have call successors, (157), 138 states have call predecessors, (157), 138 states have return successors, (157), 146 states have call predecessors, (157), 157 states have call successors, (157) [2022-12-14 08:54:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3000 states to 3000 states and 4748 transitions. [2022-12-14 08:54:04,942 INFO L78 Accepts]: Start accepts. Automaton has 3000 states and 4748 transitions. Word has length 159 [2022-12-14 08:54:04,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:54:04,942 INFO L495 AbstractCegarLoop]: Abstraction has 3000 states and 4748 transitions. [2022-12-14 08:54:04,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 08:54:04,943 INFO L276 IsEmpty]: Start isEmpty. Operand 3000 states and 4748 transitions. [2022-12-14 08:54:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-12-14 08:54:04,944 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:54:04,944 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-12-14 08:54:04,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 08:54:05,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:54:05,146 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:54:05,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:54:05,147 INFO L85 PathProgramCache]: Analyzing trace with hash 866886340, now seen corresponding path program 1 times [2022-12-14 08:54:05,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:54:05,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900866359] [2022-12-14 08:54:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:54:05,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:54:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:54:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 89 proven. 15 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-12-14 08:54:05,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:54:05,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900866359] [2022-12-14 08:54:05,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900866359] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:54:05,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412449804] [2022-12-14 08:54:05,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:54:05,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:54:05,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:54:05,282 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:54:05,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 08:54:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:54:05,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 08:54:05,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:54:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 08:54:05,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:54:05,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412449804] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:54:05,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:54:05,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-12-14 08:54:05,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877608917] [2022-12-14 08:54:05,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:54:05,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:54:05,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:54:05,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:54:05,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:54:05,402 INFO L87 Difference]: Start difference. First operand 3000 states and 4748 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-12-14 08:54:06,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:54:06,112 INFO L93 Difference]: Finished difference Result 3556 states and 5355 transitions. [2022-12-14 08:54:06,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:54:06,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 160 [2022-12-14 08:54:06,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:54:06,115 INFO L225 Difference]: With dead ends: 3556 [2022-12-14 08:54:06,115 INFO L226 Difference]: Without dead ends: 1642 [2022-12-14 08:54:06,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:54:06,117 INFO L413 NwaCegarLoop]: 3167 mSDtfsCounter, 163 mSDsluCounter, 12400 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 15567 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:54:06,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 15567 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:54:06,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2022-12-14 08:54:06,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1642. [2022-12-14 08:54:06,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 1.9914686166971358) internal successors, (3268), 1641 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:06,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 3268 transitions. [2022-12-14 08:54:06,132 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 3268 transitions. Word has length 160 [2022-12-14 08:54:06,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:54:06,132 INFO L495 AbstractCegarLoop]: Abstraction has 1642 states and 3268 transitions. [2022-12-14 08:54:06,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-12-14 08:54:06,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 3268 transitions. [2022-12-14 08:54:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1633 [2022-12-14 08:54:06,149 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:54:06,150 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:54:06,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-14 08:54:06,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 08:54:06,352 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:54:06,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:54:06,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1574839327, now seen corresponding path program 1 times [2022-12-14 08:54:06,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:54:06,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643377307] [2022-12-14 08:54:06,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:54:06,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:54:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:54:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:54:07,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:54:07,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643377307] [2022-12-14 08:54:07,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643377307] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:54:07,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:54:07,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:54:07,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559836322] [2022-12-14 08:54:07,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:54:07,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:54:07,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:54:07,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:54:07,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:54:07,593 INFO L87 Difference]: Start difference. First operand 1642 states and 3268 transitions. Second operand has 3 states, 3 states have (on average 544.0) internal successors, (1632), 2 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:11,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:54:11,934 INFO L93 Difference]: Finished difference Result 4920 states and 9799 transitions. [2022-12-14 08:54:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:54:11,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 544.0) internal successors, (1632), 2 states have internal predecessors, (1632), 0 states have call successors, (0), 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 1632 [2022-12-14 08:54:11,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:54:11,939 INFO L225 Difference]: With dead ends: 4920 [2022-12-14 08:54:11,939 INFO L226 Difference]: Without dead ends: 3280 [2022-12-14 08:54:11,940 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 [2022-12-14 08:54:11,940 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 219 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4739 mSolverCounterSat, 2448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 7187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2448 IncrementalHoareTripleChecker+Valid, 4739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:54:11,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 539 Invalid, 7187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2448 Valid, 4739 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-12-14 08:54:11,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2022-12-14 08:54:11,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 3280. [2022-12-14 08:54:11,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 3279 states have (on average 1.8109179627935346) internal successors, (5938), 3279 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:11,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 5938 transitions. [2022-12-14 08:54:11,971 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 5938 transitions. Word has length 1632 [2022-12-14 08:54:11,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:54:11,973 INFO L495 AbstractCegarLoop]: Abstraction has 3280 states and 5938 transitions. [2022-12-14 08:54:11,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 544.0) internal successors, (1632), 2 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:11,973 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 5938 transitions. [2022-12-14 08:54:11,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1642 [2022-12-14 08:54:11,991 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:54:11,992 INFO L195 NwaCegarLoop]: trace histogram [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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:54:11,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 08:54:11,992 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:54:11,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:54:11,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1024423720, now seen corresponding path program 1 times [2022-12-14 08:54:11,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:54:11,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105750043] [2022-12-14 08:54:11,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:54:11,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:54:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:54:12,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:54:12,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:54:12,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105750043] [2022-12-14 08:54:12,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105750043] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:54:12,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:54:12,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:54:12,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600435258] [2022-12-14 08:54:12,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:54:12,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:54:12,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:54:12,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:54:12,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:54:12,938 INFO L87 Difference]: Start difference. First operand 3280 states and 5938 transitions. Second operand has 3 states, 3 states have (on average 547.0) internal successors, (1641), 2 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:16,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:54:16,838 INFO L93 Difference]: Finished difference Result 9834 states and 17809 transitions. [2022-12-14 08:54:16,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:54:16,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 547.0) internal successors, (1641), 2 states have internal predecessors, (1641), 0 states have call successors, (0), 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 1641 [2022-12-14 08:54:16,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:54:16,845 INFO L225 Difference]: With dead ends: 9834 [2022-12-14 08:54:16,845 INFO L226 Difference]: Without dead ends: 6556 [2022-12-14 08:54:16,848 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 [2022-12-14 08:54:16,849 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 1714 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 5421 mSolverCounterSat, 1488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1714 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 6909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1488 IncrementalHoareTripleChecker+Valid, 5421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 08:54:16,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1714 Valid, 514 Invalid, 6909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1488 Valid, 5421 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-12-14 08:54:16,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6556 states. [2022-12-14 08:54:16,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6556 to 6556. [2022-12-14 08:54:16,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6556 states, 6555 states have (on average 1.6410373760488177) internal successors, (10757), 6555 states have internal predecessors, (10757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6556 states to 6556 states and 10757 transitions. [2022-12-14 08:54:16,915 INFO L78 Accepts]: Start accepts. Automaton has 6556 states and 10757 transitions. Word has length 1641 [2022-12-14 08:54:16,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:54:16,916 INFO L495 AbstractCegarLoop]: Abstraction has 6556 states and 10757 transitions. [2022-12-14 08:54:16,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 547.0) internal successors, (1641), 2 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:16,916 INFO L276 IsEmpty]: Start isEmpty. Operand 6556 states and 10757 transitions. [2022-12-14 08:54:16,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1647 [2022-12-14 08:54:16,937 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:54:16,937 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:54:16,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 08:54:16,938 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:54:16,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:54:16,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1895131291, now seen corresponding path program 1 times [2022-12-14 08:54:16,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:54:16,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080694365] [2022-12-14 08:54:16,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:54:16,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:54:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:54:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 08:54:17,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:54:17,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080694365] [2022-12-14 08:54:17,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080694365] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:54:17,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:54:17,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:54:17,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10929593] [2022-12-14 08:54:17,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:54:17,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:54:17,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:54:17,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:54:17,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:54:17,894 INFO L87 Difference]: Start difference. First operand 6556 states and 10757 transitions. Second operand has 3 states, 3 states have (on average 546.0) internal successors, (1638), 2 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:22,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:54:22,183 INFO L93 Difference]: Finished difference Result 19662 states and 32266 transitions. [2022-12-14 08:54:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:54:22,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 546.0) internal successors, (1638), 2 states have internal predecessors, (1638), 0 states have call successors, (0), 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 1646 [2022-12-14 08:54:22,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:54:22,193 INFO L225 Difference]: With dead ends: 19662 [2022-12-14 08:54:22,193 INFO L226 Difference]: Without dead ends: 13108 [2022-12-14 08:54:22,196 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 [2022-12-14 08:54:22,197 INFO L413 NwaCegarLoop]: 867 mSDtfsCounter, 2103 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4589 mSolverCounterSat, 2021 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2103 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 6610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2021 IncrementalHoareTripleChecker+Valid, 4589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:54:22,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2103 Valid, 877 Invalid, 6610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2021 Valid, 4589 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-12-14 08:54:22,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13108 states. [2022-12-14 08:54:22,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13108 to 13108. [2022-12-14 08:54:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13108 states, 13107 states have (on average 1.4626535439078354) internal successors, (19171), 13107 states have internal predecessors, (19171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:22,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13108 states to 13108 states and 19171 transitions. [2022-12-14 08:54:22,303 INFO L78 Accepts]: Start accepts. Automaton has 13108 states and 19171 transitions. Word has length 1646 [2022-12-14 08:54:22,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:54:22,304 INFO L495 AbstractCegarLoop]: Abstraction has 13108 states and 19171 transitions. [2022-12-14 08:54:22,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 546.0) internal successors, (1638), 2 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:22,304 INFO L276 IsEmpty]: Start isEmpty. Operand 13108 states and 19171 transitions. [2022-12-14 08:54:22,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1660 [2022-12-14 08:54:22,332 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:54:22,332 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:54:22,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-14 08:54:22,332 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:54:22,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:54:22,333 INFO L85 PathProgramCache]: Analyzing trace with hash -396238106, now seen corresponding path program 1 times [2022-12-14 08:54:22,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:54:22,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551748181] [2022-12-14 08:54:22,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:54:22,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:54:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:54:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:54:23,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:54:23,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551748181] [2022-12-14 08:54:23,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551748181] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:54:23,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:54:23,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:54:23,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96612061] [2022-12-14 08:54:23,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:54:23,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:54:23,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:54:23,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:54:23,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:54:23,470 INFO L87 Difference]: Start difference. First operand 13108 states and 19171 transitions. Second operand has 3 states, 3 states have (on average 553.0) internal successors, (1659), 3 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:29,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:54:29,319 INFO L93 Difference]: Finished difference Result 37680 states and 54243 transitions. [2022-12-14 08:54:29,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:54:29,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 553.0) internal successors, (1659), 3 states have internal predecessors, (1659), 0 states have call successors, (0), 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 1659 [2022-12-14 08:54:29,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:54:29,342 INFO L225 Difference]: With dead ends: 37680 [2022-12-14 08:54:29,342 INFO L226 Difference]: Without dead ends: 24574 [2022-12-14 08:54:29,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:54:29,354 INFO L413 NwaCegarLoop]: 2790 mSDtfsCounter, 1652 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5056 mSolverCounterSat, 1954 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1652 SdHoareTripleChecker+Valid, 2802 SdHoareTripleChecker+Invalid, 7010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1954 IncrementalHoareTripleChecker+Valid, 5056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-12-14 08:54:29,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1652 Valid, 2802 Invalid, 7010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1954 Valid, 5056 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-12-14 08:54:29,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24574 states. [2022-12-14 08:54:29,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24574 to 24574. [2022-12-14 08:54:29,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24574 states, 24573 states have (on average 1.3280836690676758) internal successors, (32635), 24573 states have internal predecessors, (32635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:29,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24574 states to 24574 states and 32635 transitions. [2022-12-14 08:54:29,594 INFO L78 Accepts]: Start accepts. Automaton has 24574 states and 32635 transitions. Word has length 1659 [2022-12-14 08:54:29,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:54:29,594 INFO L495 AbstractCegarLoop]: Abstraction has 24574 states and 32635 transitions. [2022-12-14 08:54:29,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 553.0) internal successors, (1659), 3 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:29,595 INFO L276 IsEmpty]: Start isEmpty. Operand 24574 states and 32635 transitions. [2022-12-14 08:54:29,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1670 [2022-12-14 08:54:29,626 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:54:29,627 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:54:29,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 08:54:29,627 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:54:29,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:54:29,628 INFO L85 PathProgramCache]: Analyzing trace with hash -6439370, now seen corresponding path program 1 times [2022-12-14 08:54:29,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:54:29,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491115344] [2022-12-14 08:54:29,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:54:29,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:54:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:54:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:54:30,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:54:30,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491115344] [2022-12-14 08:54:30,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491115344] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:54:30,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:54:30,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:54:30,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126804132] [2022-12-14 08:54:30,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:54:30,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:54:30,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:54:30,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:54:30,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:54:30,418 INFO L87 Difference]: Start difference. First operand 24574 states and 32635 transitions. Second operand has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 2 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:35,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:54:35,797 INFO L93 Difference]: Finished difference Result 63888 states and 85077 transitions. [2022-12-14 08:54:35,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:54:35,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 2 states have internal predecessors, (1669), 0 states have call successors, (0), 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 1669 [2022-12-14 08:54:35,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:54:35,834 INFO L225 Difference]: With dead ends: 63888 [2022-12-14 08:54:35,834 INFO L226 Difference]: Without dead ends: 39316 [2022-12-14 08:54:35,858 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 [2022-12-14 08:54:35,858 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 2759 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4651 mSolverCounterSat, 2009 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2759 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 6660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2009 IncrementalHoareTripleChecker+Valid, 4651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:54:35,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2759 Valid, 330 Invalid, 6660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2009 Valid, 4651 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-12-14 08:54:35,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39316 states. [2022-12-14 08:54:36,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39316 to 39316. [2022-12-14 08:54:36,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39316 states, 39315 states have (on average 1.2522955614905253) internal successors, (49234), 39315 states have internal predecessors, (49234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:36,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39316 states to 39316 states and 49234 transitions. [2022-12-14 08:54:36,249 INFO L78 Accepts]: Start accepts. Automaton has 39316 states and 49234 transitions. Word has length 1669 [2022-12-14 08:54:36,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:54:36,249 INFO L495 AbstractCegarLoop]: Abstraction has 39316 states and 49234 transitions. [2022-12-14 08:54:36,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 2 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:36,250 INFO L276 IsEmpty]: Start isEmpty. Operand 39316 states and 49234 transitions. [2022-12-14 08:54:36,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1742 [2022-12-14 08:54:36,295 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:54:36,295 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, 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, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:54:36,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 08:54:36,296 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:54:36,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:54:36,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1723977546, now seen corresponding path program 1 times [2022-12-14 08:54:36,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:54:36,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037395563] [2022-12-14 08:54:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:54:36,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:54:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:54:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:54:37,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:54:37,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037395563] [2022-12-14 08:54:37,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037395563] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:54:37,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:54:37,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:54:37,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558037315] [2022-12-14 08:54:37,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:54:37,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:54:37,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:54:37,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:54:37,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:54:37,659 INFO L87 Difference]: Start difference. First operand 39316 states and 49234 transitions. Second operand has 3 states, 3 states have (on average 580.3333333333334) internal successors, (1741), 3 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:42,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:54:42,654 INFO L93 Difference]: Finished difference Result 90096 states and 113632 transitions. [2022-12-14 08:54:42,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:54:42,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 580.3333333333334) internal successors, (1741), 3 states have internal predecessors, (1741), 0 states have call successors, (0), 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 1741 [2022-12-14 08:54:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:54:42,704 INFO L225 Difference]: With dead ends: 90096 [2022-12-14 08:54:42,704 INFO L226 Difference]: Without dead ends: 50782 [2022-12-14 08:54:42,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:54:42,722 INFO L413 NwaCegarLoop]: 2947 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5503 mSolverCounterSat, 1417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2959 SdHoareTripleChecker+Invalid, 6920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1417 IncrementalHoareTripleChecker+Valid, 5503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:54:42,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 2959 Invalid, 6920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1417 Valid, 5503 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-12-14 08:54:42,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50782 states. [2022-12-14 08:54:43,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50782 to 50782. [2022-12-14 08:54:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50782 states, 50781 states have (on average 1.2184872294755913) internal successors, (61876), 50781 states have internal predecessors, (61876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:43,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50782 states to 50782 states and 61876 transitions. [2022-12-14 08:54:43,213 INFO L78 Accepts]: Start accepts. Automaton has 50782 states and 61876 transitions. Word has length 1741 [2022-12-14 08:54:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:54:43,214 INFO L495 AbstractCegarLoop]: Abstraction has 50782 states and 61876 transitions. [2022-12-14 08:54:43,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 580.3333333333334) internal successors, (1741), 3 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:43,214 INFO L276 IsEmpty]: Start isEmpty. Operand 50782 states and 61876 transitions. [2022-12-14 08:54:43,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1828 [2022-12-14 08:54:43,263 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:54:43,264 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:54:43,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 08:54:43,264 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:54:43,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:54:43,265 INFO L85 PathProgramCache]: Analyzing trace with hash 641382880, now seen corresponding path program 1 times [2022-12-14 08:54:43,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:54:43,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879178428] [2022-12-14 08:54:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:54:43,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:54:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:54:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-12-14 08:54:44,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:54:44,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879178428] [2022-12-14 08:54:44,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879178428] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:54:44,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:54:44,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:54:44,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882504147] [2022-12-14 08:54:44,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:54:44,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:54:44,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:54:44,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:54:44,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:54:44,199 INFO L87 Difference]: Start difference. First operand 50782 states and 61876 transitions. Second operand has 3 states, 3 states have (on average 567.6666666666666) internal successors, (1703), 2 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:54:48,450 INFO L93 Difference]: Finished difference Result 140874 states and 169942 transitions. [2022-12-14 08:54:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:54:48,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 567.6666666666666) internal successors, (1703), 2 states have internal predecessors, (1703), 0 states have call successors, (0), 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 1827 [2022-12-14 08:54:48,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:54:48,548 INFO L225 Difference]: With dead ends: 140874 [2022-12-14 08:54:48,548 INFO L226 Difference]: Without dead ends: 90094 [2022-12-14 08:54:48,588 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 [2022-12-14 08:54:48,588 INFO L413 NwaCegarLoop]: 1112 mSDtfsCounter, 1854 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4453 mSolverCounterSat, 2279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1854 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 6732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2279 IncrementalHoareTripleChecker+Valid, 4453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 08:54:48,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1854 Valid, 1122 Invalid, 6732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2279 Valid, 4453 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-12-14 08:54:48,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90094 states. [2022-12-14 08:54:49,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90094 to 86818. [2022-12-14 08:54:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86818 states, 86817 states have (on average 1.1469873411889377) internal successors, (99578), 86817 states have internal predecessors, (99578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:49,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86818 states to 86818 states and 99578 transitions. [2022-12-14 08:54:49,446 INFO L78 Accepts]: Start accepts. Automaton has 86818 states and 99578 transitions. Word has length 1827 [2022-12-14 08:54:49,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:54:49,446 INFO L495 AbstractCegarLoop]: Abstraction has 86818 states and 99578 transitions. [2022-12-14 08:54:49,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 567.6666666666666) internal successors, (1703), 2 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:49,447 INFO L276 IsEmpty]: Start isEmpty. Operand 86818 states and 99578 transitions. [2022-12-14 08:54:49,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1846 [2022-12-14 08:54:49,523 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:54:49,524 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:54:49,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-14 08:54:49,524 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:54:49,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:54:49,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1484659090, now seen corresponding path program 1 times [2022-12-14 08:54:49,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:54:49,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593403630] [2022-12-14 08:54:49,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:54:49,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:54:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:54:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-12-14 08:54:50,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:54:50,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593403630] [2022-12-14 08:54:50,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593403630] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:54:50,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:54:50,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:54:50,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624280166] [2022-12-14 08:54:50,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:54:50,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:54:50,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:54:50,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:54:50,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:54:50,784 INFO L87 Difference]: Start difference. First operand 86818 states and 99578 transitions. Second operand has 3 states, 3 states have (on average 573.6666666666666) internal successors, (1721), 3 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:55,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:54:55,548 INFO L93 Difference]: Finished difference Result 234240 states and 267014 transitions. [2022-12-14 08:54:55,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:54:55,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 573.6666666666666) internal successors, (1721), 3 states have internal predecessors, (1721), 0 states have call successors, (0), 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 1845 [2022-12-14 08:54:55,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:54:55,696 INFO L225 Difference]: With dead ends: 234240 [2022-12-14 08:54:55,696 INFO L226 Difference]: Without dead ends: 147424 [2022-12-14 08:54:55,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:54:55,729 INFO L413 NwaCegarLoop]: 2873 mSDtfsCounter, 1705 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4737 mSolverCounterSat, 2113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1705 SdHoareTripleChecker+Valid, 2885 SdHoareTripleChecker+Invalid, 6850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2113 IncrementalHoareTripleChecker+Valid, 4737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:54:55,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1705 Valid, 2885 Invalid, 6850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2113 Valid, 4737 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-12-14 08:54:55,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147424 states. [2022-12-14 08:54:57,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147424 to 139234. [2022-12-14 08:54:57,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139234 states, 139233 states have (on average 1.1054347748019506) internal successors, (153913), 139233 states have internal predecessors, (153913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:57,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139234 states to 139234 states and 153913 transitions. [2022-12-14 08:54:57,296 INFO L78 Accepts]: Start accepts. Automaton has 139234 states and 153913 transitions. Word has length 1845 [2022-12-14 08:54:57,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:54:57,297 INFO L495 AbstractCegarLoop]: Abstraction has 139234 states and 153913 transitions. [2022-12-14 08:54:57,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 573.6666666666666) internal successors, (1721), 3 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:57,298 INFO L276 IsEmpty]: Start isEmpty. Operand 139234 states and 153913 transitions. [2022-12-14 08:54:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1973 [2022-12-14 08:54:57,428 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:54:57,429 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:54:57,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-14 08:54:57,429 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:54:57,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:54:57,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1813817088, now seen corresponding path program 1 times [2022-12-14 08:54:57,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:54:57,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521154284] [2022-12-14 08:54:57,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:54:57,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:54:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:55:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 533 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-12-14 08:55:00,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:55:00,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521154284] [2022-12-14 08:55:00,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521154284] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:55:00,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:55:00,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:55:00,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439618878] [2022-12-14 08:55:00,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:55:00,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:55:00,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:55:00,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:55:00,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:55:00,291 INFO L87 Difference]: Start difference. First operand 139234 states and 153913 transitions. Second operand has 3 states, 3 states have (on average 604.6666666666666) internal successors, (1814), 3 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:55:05,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:55:05,667 INFO L93 Difference]: Finished difference Result 321054 states and 354659 transitions. [2022-12-14 08:55:05,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:55:05,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 604.6666666666666) internal successors, (1814), 3 states have internal predecessors, (1814), 0 states have call successors, (0), 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 1972 [2022-12-14 08:55:05,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:55:05,845 INFO L225 Difference]: With dead ends: 321054 [2022-12-14 08:55:05,845 INFO L226 Difference]: Without dead ends: 181822 [2022-12-14 08:55:05,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:55:05,872 INFO L413 NwaCegarLoop]: 2923 mSDtfsCounter, 1574 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 5970 mSolverCounterSat, 685 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1574 SdHoareTripleChecker+Valid, 2934 SdHoareTripleChecker+Invalid, 6655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 685 IncrementalHoareTripleChecker+Valid, 5970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:55:05,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1574 Valid, 2934 Invalid, 6655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [685 Valid, 5970 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-12-14 08:55:06,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181822 states. [2022-12-14 08:55:07,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181822 to 175270. [2022-12-14 08:55:07,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175270 states, 175269 states have (on average 1.1010332688610078) internal successors, (192977), 175269 states have internal predecessors, (192977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:55:07,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175270 states to 175270 states and 192977 transitions. [2022-12-14 08:55:07,696 INFO L78 Accepts]: Start accepts. Automaton has 175270 states and 192977 transitions. Word has length 1972 [2022-12-14 08:55:07,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:55:07,697 INFO L495 AbstractCegarLoop]: Abstraction has 175270 states and 192977 transitions. [2022-12-14 08:55:07,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 604.6666666666666) internal successors, (1814), 3 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:55:07,697 INFO L276 IsEmpty]: Start isEmpty. Operand 175270 states and 192977 transitions. [2022-12-14 08:55:07,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2009 [2022-12-14 08:55:07,916 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:55:07,917 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:55:07,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-14 08:55:07,917 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:55:07,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:55:07,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1897935871, now seen corresponding path program 1 times [2022-12-14 08:55:07,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:55:07,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326652138] [2022-12-14 08:55:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:55:07,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:55:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:55:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 641 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-12-14 08:55:10,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:55:10,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326652138] [2022-12-14 08:55:10,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326652138] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:55:10,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:55:10,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:55:10,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597210611] [2022-12-14 08:55:10,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:55:10,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:55:10,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:55:10,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:55:10,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:55:10,235 INFO L87 Difference]: Start difference. First operand 175270 states and 192977 transitions. Second operand has 3 states, 3 states have (on average 616.6666666666666) internal successors, (1850), 3 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:55:16,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:55:16,554 INFO L93 Difference]: Finished difference Result 383298 states and 422108 transitions. [2022-12-14 08:55:16,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:55:16,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 616.6666666666666) internal successors, (1850), 3 states have internal predecessors, (1850), 0 states have call successors, (0), 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 2008 [2022-12-14 08:55:16,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:55:16,795 INFO L225 Difference]: With dead ends: 383298 [2022-12-14 08:55:16,795 INFO L226 Difference]: Without dead ends: 208030 [2022-12-14 08:55:16,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:55:16,855 INFO L413 NwaCegarLoop]: 2577 mSDtfsCounter, 1596 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4650 mSolverCounterSat, 1760 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1596 SdHoareTripleChecker+Valid, 2589 SdHoareTripleChecker+Invalid, 6410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1760 IncrementalHoareTripleChecker+Valid, 4650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:55:16,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1596 Valid, 2589 Invalid, 6410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1760 Valid, 4650 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-12-14 08:55:17,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208030 states. [2022-12-14 08:55:18,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208030 to 203116. [2022-12-14 08:55:19,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203116 states, 203115 states have (on average 1.0941535583290254) internal successors, (222239), 203115 states have internal predecessors, (222239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:55:19,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203116 states to 203116 states and 222239 transitions. [2022-12-14 08:55:19,344 INFO L78 Accepts]: Start accepts. Automaton has 203116 states and 222239 transitions. Word has length 2008 [2022-12-14 08:55:19,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:55:19,345 INFO L495 AbstractCegarLoop]: Abstraction has 203116 states and 222239 transitions. [2022-12-14 08:55:19,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 616.6666666666666) internal successors, (1850), 3 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:55:19,345 INFO L276 IsEmpty]: Start isEmpty. Operand 203116 states and 222239 transitions. [2022-12-14 08:55:19,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2137 [2022-12-14 08:55:19,567 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:55:19,568 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:55:19,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-14 08:55:19,568 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:55:19,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:55:19,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1304160580, now seen corresponding path program 1 times [2022-12-14 08:55:19,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:55:19,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436792492] [2022-12-14 08:55:19,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:55:19,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:55:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:55:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 771 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-12-14 08:55:21,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:55:21,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436792492] [2022-12-14 08:55:21,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436792492] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:55:21,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:55:21,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:55:21,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148173504] [2022-12-14 08:55:21,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:55:21,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:55:21,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:55:21,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:55:21,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:55:21,305 INFO L87 Difference]: Start difference. First operand 203116 states and 222239 transitions. Second operand has 3 states, 3 states have (on average 664.6666666666666) internal successors, (1994), 3 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:55:27,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:55:27,233 INFO L93 Difference]: Finished difference Result 473388 states and 519252 transitions. [2022-12-14 08:55:27,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:55:27,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 664.6666666666666) internal successors, (1994), 3 states have internal predecessors, (1994), 0 states have call successors, (0), 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 2136 [2022-12-14 08:55:27,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:55:27,558 INFO L225 Difference]: With dead ends: 473388 [2022-12-14 08:55:27,558 INFO L226 Difference]: Without dead ends: 270274 [2022-12-14 08:55:27,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:55:27,717 INFO L413 NwaCegarLoop]: 716 mSDtfsCounter, 2014 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4641 mSolverCounterSat, 2041 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2014 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 6682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2041 IncrementalHoareTripleChecker+Valid, 4641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:55:27,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2014 Valid, 726 Invalid, 6682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2041 Valid, 4641 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-12-14 08:55:27,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270274 states. [2022-12-14 08:55:30,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270274 to 266998. [2022-12-14 08:55:30,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266998 states, 266997 states have (on average 1.0855964673760379) internal successors, (289851), 266997 states have internal predecessors, (289851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:55:30,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266998 states to 266998 states and 289851 transitions. [2022-12-14 08:55:30,688 INFO L78 Accepts]: Start accepts. Automaton has 266998 states and 289851 transitions. Word has length 2136 [2022-12-14 08:55:30,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:55:30,688 INFO L495 AbstractCegarLoop]: Abstraction has 266998 states and 289851 transitions. [2022-12-14 08:55:30,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 664.6666666666666) internal successors, (1994), 3 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:55:30,689 INFO L276 IsEmpty]: Start isEmpty. Operand 266998 states and 289851 transitions. [2022-12-14 08:55:30,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2187 [2022-12-14 08:55:30,989 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:55:30,989 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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, 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, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:55:30,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-14 08:55:30,990 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:55:30,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:55:30,990 INFO L85 PathProgramCache]: Analyzing trace with hash -685741511, now seen corresponding path program 1 times [2022-12-14 08:55:30,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:55:30,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420129311] [2022-12-14 08:55:30,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:55:30,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:55:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:55:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 552 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-12-14 08:55:32,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:55:32,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420129311] [2022-12-14 08:55:32,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420129311] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:55:32,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:55:32,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:55:32,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689354467] [2022-12-14 08:55:32,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:55:32,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:55:32,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:55:32,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:55:32,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:55:32,749 INFO L87 Difference]: Start difference. First operand 266998 states and 289851 transitions. Second operand has 3 states, 3 states have (on average 681.3333333333334) internal successors, (2044), 3 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:55:39,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:55:39,778 INFO L93 Difference]: Finished difference Result 617532 states and 671946 transitions. [2022-12-14 08:55:39,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:55:39,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 681.3333333333334) internal successors, (2044), 3 states have internal predecessors, (2044), 0 states have call successors, (0), 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 2186 [2022-12-14 08:55:39,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:55:40,323 INFO L225 Difference]: With dead ends: 617532 [2022-12-14 08:55:40,323 INFO L226 Difference]: Without dead ends: 350536 [2022-12-14 08:55:40,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:55:40,400 INFO L413 NwaCegarLoop]: 1033 mSDtfsCounter, 28 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 5371 mSolverCounterSat, 1858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 7229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1858 IncrementalHoareTripleChecker+Valid, 5371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:55:40,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1044 Invalid, 7229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1858 Valid, 5371 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-12-14 08:55:40,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350536 states. [2022-12-14 08:55:43,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350536 to 337432. [2022-12-14 08:55:43,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337432 states, 337431 states have (on average 1.0856382490049818) internal successors, (366328), 337431 states have internal predecessors, (366328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:55:44,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337432 states to 337432 states and 366328 transitions. [2022-12-14 08:55:44,111 INFO L78 Accepts]: Start accepts. Automaton has 337432 states and 366328 transitions. Word has length 2186 [2022-12-14 08:55:44,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:55:44,113 INFO L495 AbstractCegarLoop]: Abstraction has 337432 states and 366328 transitions. [2022-12-14 08:55:44,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 681.3333333333334) internal successors, (2044), 3 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:55:44,113 INFO L276 IsEmpty]: Start isEmpty. Operand 337432 states and 366328 transitions. [2022-12-14 08:55:44,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2230 [2022-12-14 08:55:44,347 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:55:44,348 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:55:44,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-12-14 08:55:44,348 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:55:44,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:55:44,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1332844471, now seen corresponding path program 1 times [2022-12-14 08:55:44,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:55:44,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039955698] [2022-12-14 08:55:44,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:55:44,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:55:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:55:46,209 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 720 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:55:46,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:55:46,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039955698] [2022-12-14 08:55:46,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039955698] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:55:46,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:55:46,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:55:46,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705848348] [2022-12-14 08:55:46,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:55:46,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:55:46,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:55:46,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:55:46,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:55:46,213 INFO L87 Difference]: Start difference. First operand 337432 states and 366328 transitions. Second operand has 3 states, 3 states have (on average 743.0) internal successors, (2229), 3 states have internal predecessors, (2229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:55:53,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:55:53,596 INFO L93 Difference]: Finished difference Result 743658 states and 808993 transitions. [2022-12-14 08:55:53,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:55:53,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 743.0) internal successors, (2229), 3 states have internal predecessors, (2229), 0 states have call successors, (0), 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 2229 [2022-12-14 08:55:53,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:55:54,270 INFO L225 Difference]: With dead ends: 743658 [2022-12-14 08:55:54,271 INFO L226 Difference]: Without dead ends: 404590 [2022-12-14 08:55:54,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:55:54,344 INFO L413 NwaCegarLoop]: 2756 mSDtfsCounter, 1524 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 5678 mSolverCounterSat, 1280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 2767 SdHoareTripleChecker+Invalid, 6958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1280 IncrementalHoareTripleChecker+Valid, 5678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:55:54,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1524 Valid, 2767 Invalid, 6958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1280 Valid, 5678 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-12-14 08:55:54,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404590 states. [2022-12-14 08:55:58,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404590 to 404590. [2022-12-14 08:55:58,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404590 states, 404589 states have (on average 1.0757707204100952) internal successors, (435245), 404589 states have internal predecessors, (435245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:55:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404590 states to 404590 states and 435245 transitions. [2022-12-14 08:55:58,720 INFO L78 Accepts]: Start accepts. Automaton has 404590 states and 435245 transitions. Word has length 2229 [2022-12-14 08:55:58,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:55:58,721 INFO L495 AbstractCegarLoop]: Abstraction has 404590 states and 435245 transitions. [2022-12-14 08:55:58,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 743.0) internal successors, (2229), 3 states have internal predecessors, (2229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:55:58,722 INFO L276 IsEmpty]: Start isEmpty. Operand 404590 states and 435245 transitions. [2022-12-14 08:55:59,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2261 [2022-12-14 08:55:59,096 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:55:59,097 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:55:59,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-12-14 08:55:59,097 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:55:59,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:55:59,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1256780958, now seen corresponding path program 1 times [2022-12-14 08:55:59,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:55:59,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190636814] [2022-12-14 08:55:59,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:55:59,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:55:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:00,854 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 645 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-12-14 08:56:00,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:56:00,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190636814] [2022-12-14 08:56:00,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190636814] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:00,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:00,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:56:00,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142363975] [2022-12-14 08:56:00,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:00,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:56:00,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:56:00,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:56:00,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:56:00,858 INFO L87 Difference]: Start difference. First operand 404590 states and 435245 transitions. Second operand has 3 states, 3 states have (on average 702.0) internal successors, (2106), 2 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:07,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:07,910 INFO L93 Difference]: Finished difference Result 856680 states and 920669 transitions. [2022-12-14 08:56:07,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:56:07,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 702.0) internal successors, (2106), 2 states have internal predecessors, (2106), 0 states have call successors, (0), 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 2260 [2022-12-14 08:56:07,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:08,610 INFO L225 Difference]: With dead ends: 856680 [2022-12-14 08:56:08,610 INFO L226 Difference]: Without dead ends: 452092 [2022-12-14 08:56:08,702 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 [2022-12-14 08:56:08,702 INFO L413 NwaCegarLoop]: 1077 mSDtfsCounter, 1230 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 5487 mSolverCounterSat, 1268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1230 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 6755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1268 IncrementalHoareTripleChecker+Valid, 5487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:08,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1230 Valid, 1088 Invalid, 6755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1268 Valid, 5487 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-12-14 08:56:09,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452092 states. [2022-12-14 08:56:12,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452092 to 440626. [2022-12-14 08:56:13,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440626 states, 440625 states have (on average 1.061142695035461) internal successors, (467566), 440625 states have internal predecessors, (467566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440626 states to 440626 states and 467566 transitions. [2022-12-14 08:56:13,690 INFO L78 Accepts]: Start accepts. Automaton has 440626 states and 467566 transitions. Word has length 2260 [2022-12-14 08:56:13,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:13,691 INFO L495 AbstractCegarLoop]: Abstraction has 440626 states and 467566 transitions. [2022-12-14 08:56:13,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 702.0) internal successors, (2106), 2 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand 440626 states and 467566 transitions. [2022-12-14 08:56:14,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2353 [2022-12-14 08:56:14,092 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:14,093 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:14,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-12-14 08:56:14,094 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:56:14,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:14,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1939025123, now seen corresponding path program 1 times [2022-12-14 08:56:14,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:56:14,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027331895] [2022-12-14 08:56:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:14,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:56:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 964 proven. 0 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2022-12-14 08:56:16,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:56:16,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027331895] [2022-12-14 08:56:16,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027331895] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:16,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:16,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:56:16,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337611682] [2022-12-14 08:56:16,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:16,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:56:16,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:56:16,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:56:16,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:56:16,902 INFO L87 Difference]: Start difference. First operand 440626 states and 467566 transitions. Second operand has 3 states, 3 states have (on average 706.0) internal successors, (2118), 3 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:23,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:23,392 INFO L93 Difference]: Finished difference Result 887802 states and 941772 transitions. [2022-12-14 08:56:23,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:56:23,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 706.0) internal successors, (2118), 3 states have internal predecessors, (2118), 0 states have call successors, (0), 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 2352 [2022-12-14 08:56:23,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:24,144 INFO L225 Difference]: With dead ends: 887802 [2022-12-14 08:56:24,145 INFO L226 Difference]: Without dead ends: 447178 [2022-12-14 08:56:24,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:56:24,309 INFO L413 NwaCegarLoop]: 1151 mSDtfsCounter, 1537 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 5519 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 5841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 5519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:24,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1537 Valid, 1162 Invalid, 5841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 5519 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-12-14 08:56:24,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447178 states. [2022-12-14 08:56:28,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447178 to 440626. [2022-12-14 08:56:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440626 states, 440625 states have (on average 1.0600056737588652) internal successors, (467065), 440625 states have internal predecessors, (467065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:29,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440626 states to 440626 states and 467065 transitions. [2022-12-14 08:56:29,082 INFO L78 Accepts]: Start accepts. Automaton has 440626 states and 467065 transitions. Word has length 2352 [2022-12-14 08:56:29,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:29,083 INFO L495 AbstractCegarLoop]: Abstraction has 440626 states and 467065 transitions. [2022-12-14 08:56:29,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 706.0) internal successors, (2118), 3 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:29,083 INFO L276 IsEmpty]: Start isEmpty. Operand 440626 states and 467065 transitions. [2022-12-14 08:56:29,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2358 [2022-12-14 08:56:29,479 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:29,480 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:29,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-12-14 08:56:29,480 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:56:29,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:29,481 INFO L85 PathProgramCache]: Analyzing trace with hash -996489869, now seen corresponding path program 1 times [2022-12-14 08:56:29,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:56:29,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696616984] [2022-12-14 08:56:29,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:29,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:56:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 723 proven. 0 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2022-12-14 08:56:31,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:56:31,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696616984] [2022-12-14 08:56:31,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696616984] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:31,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:31,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:56:31,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25139701] [2022-12-14 08:56:31,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:31,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:56:31,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:56:31,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:56:31,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:56:31,770 INFO L87 Difference]: Start difference. First operand 440626 states and 467065 transitions. Second operand has 3 states, 3 states have (on average 671.0) internal successors, (2013), 3 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:38,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:38,373 INFO L93 Difference]: Finished difference Result 897630 states and 951529 transitions. [2022-12-14 08:56:38,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:56:38,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 671.0) internal successors, (2013), 3 states have internal predecessors, (2013), 0 states have call successors, (0), 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 2357 [2022-12-14 08:56:38,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:38,994 INFO L225 Difference]: With dead ends: 897630 [2022-12-14 08:56:38,994 INFO L226 Difference]: Without dead ends: 457006 [2022-12-14 08:56:39,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:56:39,132 INFO L413 NwaCegarLoop]: 2808 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5739 mSolverCounterSat, 977 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2820 SdHoareTripleChecker+Invalid, 6716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 977 IncrementalHoareTripleChecker+Valid, 5739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:39,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 2820 Invalid, 6716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [977 Valid, 5739 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-12-14 08:56:39,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457006 states. [2022-12-14 08:56:43,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457006 to 450454. [2022-12-14 08:56:43,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450454 states, 450453 states have (on average 1.053950134642238) internal successors, (474755), 450453 states have internal predecessors, (474755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:44,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450454 states to 450454 states and 474755 transitions. [2022-12-14 08:56:44,185 INFO L78 Accepts]: Start accepts. Automaton has 450454 states and 474755 transitions. Word has length 2357 [2022-12-14 08:56:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:56:44,186 INFO L495 AbstractCegarLoop]: Abstraction has 450454 states and 474755 transitions. [2022-12-14 08:56:44,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 671.0) internal successors, (2013), 3 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:44,186 INFO L276 IsEmpty]: Start isEmpty. Operand 450454 states and 474755 transitions. [2022-12-14 08:56:44,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2498 [2022-12-14 08:56:44,473 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:44,474 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:56:44,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-12-14 08:56:44,474 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:56:44,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:44,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1593709374, now seen corresponding path program 1 times [2022-12-14 08:56:44,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:56:44,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259609252] [2022-12-14 08:56:44,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:44,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:56:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:56:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 860 proven. 0 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-12-14 08:56:47,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:56:47,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259609252] [2022-12-14 08:56:47,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259609252] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:56:47,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:56:47,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:56:47,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787552615] [2022-12-14 08:56:47,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:56:47,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:56:47,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:56:47,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:56:47,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:56:47,293 INFO L87 Difference]: Start difference. First operand 450454 states and 474755 transitions. Second operand has 3 states, 3 states have (on average 727.3333333333334) internal successors, (2182), 2 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:56:54,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:56:54,629 INFO L93 Difference]: Finished difference Result 900906 states and 949508 transitions. [2022-12-14 08:56:54,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:56:54,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 727.3333333333334) internal successors, (2182), 2 states have internal predecessors, (2182), 0 states have call successors, (0), 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 2497 [2022-12-14 08:56:54,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:56:55,228 INFO L225 Difference]: With dead ends: 900906 [2022-12-14 08:56:55,229 INFO L226 Difference]: Without dead ends: 448816 [2022-12-14 08:56:55,361 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 [2022-12-14 08:56:55,362 INFO L413 NwaCegarLoop]: 1160 mSDtfsCounter, 1302 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4256 mSolverCounterSat, 1306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1302 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 5562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1306 IncrementalHoareTripleChecker+Valid, 4256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:56:55,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1302 Valid, 1170 Invalid, 5562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1306 Valid, 4256 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-12-14 08:56:55,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448816 states. [2022-12-14 08:56:59,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448816 to 447178. [2022-12-14 08:56:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447178 states, 447177 states have (on average 1.0273828931273299) internal successors, (459422), 447177 states have internal predecessors, (459422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:00,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447178 states to 447178 states and 459422 transitions. [2022-12-14 08:57:00,042 INFO L78 Accepts]: Start accepts. Automaton has 447178 states and 459422 transitions. Word has length 2497 [2022-12-14 08:57:00,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:00,043 INFO L495 AbstractCegarLoop]: Abstraction has 447178 states and 459422 transitions. [2022-12-14 08:57:00,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 727.3333333333334) internal successors, (2182), 2 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:00,044 INFO L276 IsEmpty]: Start isEmpty. Operand 447178 states and 459422 transitions. [2022-12-14 08:57:00,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2501 [2022-12-14 08:57:00,510 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:00,510 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:57:00,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-12-14 08:57:00,511 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:57:00,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:00,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1812634012, now seen corresponding path program 1 times [2022-12-14 08:57:00,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:57:00,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387069160] [2022-12-14 08:57:00,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:00,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:57:00,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 1232 proven. 10 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-12-14 08:57:06,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:57:06,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387069160] [2022-12-14 08:57:06,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387069160] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:57:06,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113298376] [2022-12-14 08:57:06,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:06,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:57:06,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:57:06,053 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:57:06,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 08:57:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:06,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 2828 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:57:06,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 754 proven. 0 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2022-12-14 08:57:08,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:57:08,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113298376] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:08,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:57:08,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-12-14 08:57:08,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157704691] [2022-12-14 08:57:08,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:08,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:57:08,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:57:08,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:57:08,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:57:08,251 INFO L87 Difference]: Start difference. First operand 447178 states and 459422 transitions. Second operand has 3 states, 3 states have (on average 623.6666666666666) internal successors, (1871), 3 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:13,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:13,713 INFO L93 Difference]: Finished difference Result 897630 states and 922376 transitions. [2022-12-14 08:57:13,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:57:13,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 623.6666666666666) internal successors, (1871), 3 states have internal predecessors, (1871), 0 states have call successors, (0), 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 2500 [2022-12-14 08:57:13,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:14,396 INFO L225 Difference]: With dead ends: 897630 [2022-12-14 08:57:14,396 INFO L226 Difference]: Without dead ends: 450454 [2022-12-14 08:57:14,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2506 GetRequests, 2499 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:57:14,686 INFO L413 NwaCegarLoop]: 1962 mSDtfsCounter, 160 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4030 mSolverCounterSat, 856 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1974 SdHoareTripleChecker+Invalid, 4886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 856 IncrementalHoareTripleChecker+Valid, 4030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:14,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 1974 Invalid, 4886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [856 Valid, 4030 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 08:57:15,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450454 states. [2022-12-14 08:57:18,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450454 to 448816. [2022-12-14 08:57:18,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448816 states, 448815 states have (on average 1.0244933881443357) internal successors, (459808), 448815 states have internal predecessors, (459808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:19,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448816 states to 448816 states and 459808 transitions. [2022-12-14 08:57:19,479 INFO L78 Accepts]: Start accepts. Automaton has 448816 states and 459808 transitions. Word has length 2500 [2022-12-14 08:57:19,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:19,481 INFO L495 AbstractCegarLoop]: Abstraction has 448816 states and 459808 transitions. [2022-12-14 08:57:19,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 623.6666666666666) internal successors, (1871), 3 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:19,482 INFO L276 IsEmpty]: Start isEmpty. Operand 448816 states and 459808 transitions. [2022-12-14 08:57:19,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2516 [2022-12-14 08:57:19,787 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:19,788 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:57:19,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 08:57:19,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:57:19,989 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:57:19,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:19,991 INFO L85 PathProgramCache]: Analyzing trace with hash -205196468, now seen corresponding path program 1 times [2022-12-14 08:57:19,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:57:19,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583001320] [2022-12-14 08:57:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:19,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:57:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1229 backedges. 913 proven. 0 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-12-14 08:57:23,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:57:23,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583001320] [2022-12-14 08:57:23,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583001320] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:23,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:23,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:57:23,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932683308] [2022-12-14 08:57:23,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:23,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:57:23,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:57:23,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:57:23,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:57:23,731 INFO L87 Difference]: Start difference. First operand 448816 states and 459808 transitions. Second operand has 4 states, 4 states have (on average 550.0) internal successors, (2200), 3 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:31,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:31,644 INFO L93 Difference]: Finished difference Result 897630 states and 919614 transitions. [2022-12-14 08:57:31,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:57:31,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 550.0) internal successors, (2200), 3 states have internal predecessors, (2200), 0 states have call successors, (0), 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 2515 [2022-12-14 08:57:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:32,365 INFO L225 Difference]: With dead ends: 897630 [2022-12-14 08:57:32,365 INFO L226 Difference]: Without dead ends: 448816 [2022-12-14 08:57:32,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:57:32,493 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 3113 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7877 mSolverCounterSat, 761 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3113 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 8638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 761 IncrementalHoareTripleChecker+Valid, 7877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:32,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3113 Valid, 271 Invalid, 8638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [761 Valid, 7877 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-12-14 08:57:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448816 states. [2022-12-14 08:57:36,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448816 to 448816. [2022-12-14 08:57:36,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448816 states, 448815 states have (on average 1.024092332029901) internal successors, (459628), 448815 states have internal predecessors, (459628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448816 states to 448816 states and 459628 transitions. [2022-12-14 08:57:37,126 INFO L78 Accepts]: Start accepts. Automaton has 448816 states and 459628 transitions. Word has length 2515 [2022-12-14 08:57:37,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:37,127 INFO L495 AbstractCegarLoop]: Abstraction has 448816 states and 459628 transitions. [2022-12-14 08:57:37,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 550.0) internal successors, (2200), 3 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:37,127 INFO L276 IsEmpty]: Start isEmpty. Operand 448816 states and 459628 transitions. [2022-12-14 08:57:37,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2643 [2022-12-14 08:57:37,615 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:37,616 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:57:37,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-12-14 08:57:37,616 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:57:37,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:37,617 INFO L85 PathProgramCache]: Analyzing trace with hash -513652642, now seen corresponding path program 1 times [2022-12-14 08:57:37,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:57:37,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120843293] [2022-12-14 08:57:37,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:37,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:57:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 1294 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-12-14 08:57:40,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:57:40,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120843293] [2022-12-14 08:57:40,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120843293] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:40,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:40,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:57:40,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649760640] [2022-12-14 08:57:40,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:40,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:57:40,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:57:40,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:57:40,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:57:40,853 INFO L87 Difference]: Start difference. First operand 448816 states and 459628 transitions. Second operand has 3 states, 3 states have (on average 764.3333333333334) internal successors, (2293), 3 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:47,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:47,197 INFO L93 Difference]: Finished difference Result 927114 states and 949975 transitions. [2022-12-14 08:57:47,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:57:47,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 764.3333333333334) internal successors, (2293), 3 states have internal predecessors, (2293), 0 states have call successors, (0), 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 2642 [2022-12-14 08:57:47,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:47,821 INFO L225 Difference]: With dead ends: 927114 [2022-12-14 08:57:47,821 INFO L226 Difference]: Without dead ends: 471748 [2022-12-14 08:57:47,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:57:47,960 INFO L413 NwaCegarLoop]: 2044 mSDtfsCounter, 1102 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4323 mSolverCounterSat, 801 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1102 SdHoareTripleChecker+Valid, 2055 SdHoareTripleChecker+Invalid, 5124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 801 IncrementalHoareTripleChecker+Valid, 4323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:47,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1102 Valid, 2055 Invalid, 5124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [801 Valid, 4323 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-12-14 08:57:48,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471748 states. [2022-12-14 08:57:52,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471748 to 465196. [2022-12-14 08:57:52,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465196 states, 465195 states have (on average 1.0211674674061415) internal successors, (475042), 465195 states have internal predecessors, (475042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:53,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465196 states to 465196 states and 475042 transitions. [2022-12-14 08:57:53,133 INFO L78 Accepts]: Start accepts. Automaton has 465196 states and 475042 transitions. Word has length 2642 [2022-12-14 08:57:53,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:53,134 INFO L495 AbstractCegarLoop]: Abstraction has 465196 states and 475042 transitions. [2022-12-14 08:57:53,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 764.3333333333334) internal successors, (2293), 3 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:53,134 INFO L276 IsEmpty]: Start isEmpty. Operand 465196 states and 475042 transitions. [2022-12-14 08:57:53,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2711 [2022-12-14 08:57:53,595 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:53,596 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:57:53,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-12-14 08:57:53,596 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:57:53,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:53,597 INFO L85 PathProgramCache]: Analyzing trace with hash 928103995, now seen corresponding path program 1 times [2022-12-14 08:57:53,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:57:53,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322960861] [2022-12-14 08:57:53,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:53,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:57:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2319 backedges. 1506 proven. 0 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2022-12-14 08:57:55,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:57:55,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322960861] [2022-12-14 08:57:55,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322960861] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:55,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:55,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:57:55,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514867076] [2022-12-14 08:57:55,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:55,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:57:55,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:57:55,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:57:55,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:57:55,735 INFO L87 Difference]: Start difference. First operand 465196 states and 475042 transitions. Second operand has 3 states, 3 states have (on average 710.3333333333334) internal successors, (2131), 3 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:01,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:58:01,852 INFO L93 Difference]: Finished difference Result 928752 states and 948270 transitions. [2022-12-14 08:58:01,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:58:01,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 710.3333333333334) internal successors, (2131), 3 states have internal predecessors, (2131), 0 states have call successors, (0), 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 2710 [2022-12-14 08:58:01,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:58:02,482 INFO L225 Difference]: With dead ends: 928752 [2022-12-14 08:58:02,482 INFO L226 Difference]: Without dead ends: 463558 [2022-12-14 08:58:02,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:58:02,771 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 1381 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4181 mSolverCounterSat, 786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1381 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 4967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 4181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-12-14 08:58:02,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1381 Valid, 289 Invalid, 4967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [786 Valid, 4181 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-12-14 08:58:03,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463558 states. [2022-12-14 08:58:06,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463558 to 463558. [2022-12-14 08:58:06,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463558 states, 463557 states have (on average 1.0178575665991454) internal successors, (471835), 463557 states have internal predecessors, (471835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463558 states to 463558 states and 471835 transitions. [2022-12-14 08:58:07,252 INFO L78 Accepts]: Start accepts. Automaton has 463558 states and 471835 transitions. Word has length 2710 [2022-12-14 08:58:07,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:58:07,253 INFO L495 AbstractCegarLoop]: Abstraction has 463558 states and 471835 transitions. [2022-12-14 08:58:07,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 710.3333333333334) internal successors, (2131), 3 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:07,253 INFO L276 IsEmpty]: Start isEmpty. Operand 463558 states and 471835 transitions. [2022-12-14 08:58:07,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2739 [2022-12-14 08:58:07,742 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:58:07,742 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:58:07,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-12-14 08:58:07,743 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:58:07,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:58:07,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1708032309, now seen corresponding path program 1 times [2022-12-14 08:58:07,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:58:07,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996399379] [2022-12-14 08:58:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:58:07,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:58:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:58:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2143 backedges. 1367 proven. 0 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-12-14 08:58:10,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:58:10,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996399379] [2022-12-14 08:58:10,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996399379] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:58:10,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:58:10,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:58:10,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427185627] [2022-12-14 08:58:10,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:58:10,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:58:10,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:58:10,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:58:10,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:58:10,104 INFO L87 Difference]: Start difference. First operand 463558 states and 471835 transitions. Second operand has 3 states, 3 states have (on average 731.3333333333334) internal successors, (2194), 3 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:15,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:58:15,623 INFO L93 Difference]: Finished difference Result 928752 states and 945368 transitions. [2022-12-14 08:58:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:58:15,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 731.3333333333334) internal successors, (2194), 3 states have internal predecessors, (2194), 0 states have call successors, (0), 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 2738 [2022-12-14 08:58:15,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:58:16,193 INFO L225 Difference]: With dead ends: 928752 [2022-12-14 08:58:16,193 INFO L226 Difference]: Without dead ends: 465196 [2022-12-14 08:58:16,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:58:16,355 INFO L413 NwaCegarLoop]: 2122 mSDtfsCounter, 1570 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4233 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 2134 SdHoareTripleChecker+Invalid, 4580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 4233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:58:16,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1570 Valid, 2134 Invalid, 4580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 4233 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 08:58:16,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465196 states. [2022-12-14 08:58:20,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465196 to 463558. [2022-12-14 08:58:20,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463558 states, 463557 states have (on average 1.0155881585220372) internal successors, (470783), 463557 states have internal predecessors, (470783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:21,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463558 states to 463558 states and 470783 transitions. [2022-12-14 08:58:21,317 INFO L78 Accepts]: Start accepts. Automaton has 463558 states and 470783 transitions. Word has length 2738 [2022-12-14 08:58:21,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:58:21,318 INFO L495 AbstractCegarLoop]: Abstraction has 463558 states and 470783 transitions. [2022-12-14 08:58:21,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 731.3333333333334) internal successors, (2194), 3 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:21,318 INFO L276 IsEmpty]: Start isEmpty. Operand 463558 states and 470783 transitions. [2022-12-14 08:58:21,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2869 [2022-12-14 08:58:21,875 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:58:21,876 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:58:21,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-12-14 08:58:21,876 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:58:21,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:58:21,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1144198840, now seen corresponding path program 1 times [2022-12-14 08:58:21,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:58:21,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132161586] [2022-12-14 08:58:21,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:58:21,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:58:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:58:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2357 backedges. 1555 proven. 0 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2022-12-14 08:58:25,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:58:25,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132161586] [2022-12-14 08:58:25,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132161586] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:58:25,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:58:25,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:58:25,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353838508] [2022-12-14 08:58:25,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:58:25,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:58:25,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:58:25,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:58:25,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:58:25,763 INFO L87 Difference]: Start difference. First operand 463558 states and 470783 transitions. Second operand has 3 states, 3 states have (on average 770.3333333333334) internal successors, (2311), 3 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:32,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:58:32,147 INFO L93 Difference]: Finished difference Result 943494 states and 958092 transitions. [2022-12-14 08:58:32,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:58:32,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 770.3333333333334) internal successors, (2311), 3 states have internal predecessors, (2311), 0 states have call successors, (0), 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 2868 [2022-12-14 08:58:32,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:58:32,938 INFO L225 Difference]: With dead ends: 943494 [2022-12-14 08:58:32,939 INFO L226 Difference]: Without dead ends: 479938 [2022-12-14 08:58:33,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:58:33,043 INFO L413 NwaCegarLoop]: 2199 mSDtfsCounter, 1080 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4379 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 2211 SdHoareTripleChecker+Invalid, 4676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 4379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 08:58:33,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 2211 Invalid, 4676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 4379 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-12-14 08:58:33,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479938 states. [2022-12-14 08:58:37,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479938 to 460282. [2022-12-14 08:58:37,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460282 states, 460281 states have (on average 1.0151320606325267) internal successors, (467246), 460281 states have internal predecessors, (467246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:37,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460282 states to 460282 states and 467246 transitions. [2022-12-14 08:58:37,757 INFO L78 Accepts]: Start accepts. Automaton has 460282 states and 467246 transitions. Word has length 2868 [2022-12-14 08:58:37,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:58:37,757 INFO L495 AbstractCegarLoop]: Abstraction has 460282 states and 467246 transitions. [2022-12-14 08:58:37,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 770.3333333333334) internal successors, (2311), 3 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:37,758 INFO L276 IsEmpty]: Start isEmpty. Operand 460282 states and 467246 transitions. [2022-12-14 08:58:38,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2893 [2022-12-14 08:58:38,270 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:58:38,271 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:58:38,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-12-14 08:58:38,271 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:58:38,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:58:38,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1178210940, now seen corresponding path program 1 times [2022-12-14 08:58:38,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:58:38,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179696453] [2022-12-14 08:58:38,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:58:38,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:58:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:58:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2315 backedges. 1710 proven. 289 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-12-14 08:58:44,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:58:44,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179696453] [2022-12-14 08:58:44,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179696453] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:58:44,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909838944] [2022-12-14 08:58:44,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:58:44,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:58:44,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:58:44,615 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:58:44,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 08:58:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:58:45,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 3212 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:58:45,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2315 backedges. 1589 proven. 0 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2022-12-14 08:58:47,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:58:47,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909838944] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:58:47,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:58:47,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-12-14 08:58:47,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980862780] [2022-12-14 08:58:47,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:58:47,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:58:47,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:58:47,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:58:47,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:58:47,127 INFO L87 Difference]: Start difference. First operand 460282 states and 467246 transitions. Second operand has 3 states, 3 states have (on average 728.6666666666666) internal successors, (2186), 3 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:53,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:58:53,986 INFO L93 Difference]: Finished difference Result 995910 states and 1011222 transitions. [2022-12-14 08:58:53,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:58:53,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 728.6666666666666) internal successors, (2186), 3 states have internal predecessors, (2186), 0 states have call successors, (0), 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 2892 [2022-12-14 08:58:53,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:58:54,680 INFO L225 Difference]: With dead ends: 995910 [2022-12-14 08:58:54,680 INFO L226 Difference]: Without dead ends: 535630 [2022-12-14 08:58:54,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2897 GetRequests, 2891 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:58:54,842 INFO L413 NwaCegarLoop]: 2226 mSDtfsCounter, 56 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4589 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 2238 SdHoareTripleChecker+Invalid, 4724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 4589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:58:54,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 2238 Invalid, 4724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 4589 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-12-14 08:58:55,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535630 states. [2022-12-14 08:58:59,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535630 to 532354. [2022-12-14 08:59:00,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532354 states, 532353 states have (on average 1.0150107165734015) internal successors, (540344), 532353 states have internal predecessors, (540344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:00,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532354 states to 532354 states and 540344 transitions. [2022-12-14 08:59:00,836 INFO L78 Accepts]: Start accepts. Automaton has 532354 states and 540344 transitions. Word has length 2892 [2022-12-14 08:59:00,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:59:00,837 INFO L495 AbstractCegarLoop]: Abstraction has 532354 states and 540344 transitions. [2022-12-14 08:59:00,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 728.6666666666666) internal successors, (2186), 3 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:00,837 INFO L276 IsEmpty]: Start isEmpty. Operand 532354 states and 540344 transitions. [2022-12-14 08:59:01,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3178 [2022-12-14 08:59:01,171 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:59:01,172 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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] [2022-12-14 08:59:01,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 08:59:01,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:01,374 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:59:01,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:59:01,377 INFO L85 PathProgramCache]: Analyzing trace with hash -566959176, now seen corresponding path program 1 times [2022-12-14 08:59:01,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:59:01,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888620609] [2022-12-14 08:59:01,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:01,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:59:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2599 backedges. 2219 proven. 47 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-12-14 08:59:10,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:59:10,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888620609] [2022-12-14 08:59:10,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888620609] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:59:10,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626123002] [2022-12-14 08:59:10,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:10,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:10,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:59:10,707 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:59:10,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 08:59:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:11,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 3493 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:59:11,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:59:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2599 backedges. 2266 proven. 0 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-12-14 08:59:13,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:59:13,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626123002] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:59:13,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:59:13,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-12-14 08:59:13,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197240310] [2022-12-14 08:59:13,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:59:13,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:59:13,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:59:13,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:59:13,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:59:13,690 INFO L87 Difference]: Start difference. First operand 532354 states and 540344 transitions. Second operand has 4 states, 4 states have (on average 711.5) internal successors, (2846), 3 states have internal predecessors, (2846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:21,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:59:21,820 INFO L93 Difference]: Finished difference Result 1061430 states and 1077280 transitions. [2022-12-14 08:59:21,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:59:21,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 711.5) internal successors, (2846), 3 states have internal predecessors, (2846), 0 states have call successors, (0), 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 3177 [2022-12-14 08:59:21,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:59:22,510 INFO L225 Difference]: With dead ends: 1061430 [2022-12-14 08:59:22,511 INFO L226 Difference]: Without dead ends: 529078 [2022-12-14 08:59:22,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3183 GetRequests, 3175 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:59:22,683 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 2221 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7744 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2221 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 8201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 7744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:59:22,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2221 Valid, 424 Invalid, 8201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 7744 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-12-14 08:59:23,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529078 states. [2022-12-14 08:59:27,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529078 to 524164. [2022-12-14 08:59:27,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524164 states, 524163 states have (on average 1.0131371348225648) internal successors, (531049), 524163 states have internal predecessors, (531049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:28,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524164 states to 524164 states and 531049 transitions. [2022-12-14 08:59:28,291 INFO L78 Accepts]: Start accepts. Automaton has 524164 states and 531049 transitions. Word has length 3177 [2022-12-14 08:59:28,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:59:28,292 INFO L495 AbstractCegarLoop]: Abstraction has 524164 states and 531049 transitions. [2022-12-14 08:59:28,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 711.5) internal successors, (2846), 3 states have internal predecessors, (2846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:28,292 INFO L276 IsEmpty]: Start isEmpty. Operand 524164 states and 531049 transitions. [2022-12-14 08:59:28,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3393 [2022-12-14 08:59:28,848 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:59:28,849 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:59:28,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 08:59:29,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dee75d1-3d6f-4669-8961-af4fb9606d70/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:29,050 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:59:29,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:59:29,058 INFO L85 PathProgramCache]: Analyzing trace with hash 961954186, now seen corresponding path program 1 times [2022-12-14 08:59:29,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:59:29,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087769502] [2022-12-14 08:59:29,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:29,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:59:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6763 backedges. 3695 proven. 0 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2022-12-14 08:59:34,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:59:34,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087769502] [2022-12-14 08:59:34,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087769502] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:59:34,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:59:34,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:59:34,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329167069] [2022-12-14 08:59:34,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:59:34,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:59:34,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:59:34,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:59:34,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:59:34,536 INFO L87 Difference]: Start difference. First operand 524164 states and 531049 transitions. Second operand has 3 states, 3 states have (on average 706.0) internal successors, (2118), 3 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:40,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:59:40,714 INFO L93 Difference]: Finished difference Result 1051602 states and 1065386 transitions. [2022-12-14 08:59:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:59:40,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 706.0) internal successors, (2118), 3 states have internal predecessors, (2118), 0 states have call successors, (0), 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 3392 [2022-12-14 08:59:40,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:59:41,381 INFO L225 Difference]: With dead ends: 1051602 [2022-12-14 08:59:41,381 INFO L226 Difference]: Without dead ends: 527440 [2022-12-14 08:59:41,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:59:41,533 INFO L413 NwaCegarLoop]: 2177 mSDtfsCounter, 1396 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4383 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1396 SdHoareTripleChecker+Valid, 2189 SdHoareTripleChecker+Invalid, 4498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 4383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:59:41,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1396 Valid, 2189 Invalid, 4498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 4383 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 08:59:42,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527440 states.