./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d0e75-db99-48c1-a1e1-d8e1fb9e157b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d0e75-db99-48c1-a1e1-d8e1fb9e157b/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_9e4d0e75-db99-48c1-a1e1-d8e1fb9e157b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d0e75-db99-48c1-a1e1-d8e1fb9e157b/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d0e75-db99-48c1-a1e1-d8e1fb9e157b/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_9e4d0e75-db99-48c1-a1e1-d8e1fb9e157b/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 e1221f43edcd55fb28cc2c33b3cd78828237d81c097e561fccaa486cdd56e141 --- 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 11:15:50,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:15:50,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:15:50,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:15:50,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:15:50,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:15:50,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:15:50,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:15:50,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:15:50,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:15:50,830 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:15:50,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:15:50,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:15:50,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:15:50,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:15:50,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:15:50,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:15:50,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:15:50,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:15:50,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:15:50,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:15:50,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:15:50,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:15:50,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:15:50,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:15:50,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:15:50,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:15:50,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:15:50,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:15:50,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:15:50,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:15:50,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:15:50,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:15:50,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:15:50,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:15:50,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:15:50,847 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:15:50,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:15:50,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:15:50,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:15:50,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:15:50,849 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d0e75-db99-48c1-a1e1-d8e1fb9e157b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:15:50,871 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:15:50,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:15:50,880 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:15:50,880 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:15:50,881 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:15:50,881 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:15:50,881 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:15:50,882 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:15:50,882 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:15:50,882 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:15:50,882 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:15:50,882 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:15:50,883 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:15:50,883 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:15:50,883 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:15:50,883 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:15:50,884 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:15:50,884 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:15:50,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:15:50,885 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:15:50,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:15:50,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:15:50,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:15:50,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:15:50,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:15:50,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:15:50,886 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:15:50,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:15:50,886 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:15:50,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:15:50,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:15:50,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:15:50,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:15:50,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:15:50,888 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:15:50,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:15:50,888 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:15:50,888 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:15:50,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:15:50,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:15:50,889 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:15:50,889 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_9e4d0e75-db99-48c1-a1e1-d8e1fb9e157b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d0e75-db99-48c1-a1e1-d8e1fb9e157b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1221f43edcd55fb28cc2c33b3cd78828237d81c097e561fccaa486cdd56e141 [2022-12-14 11:15:51,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:15:51,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:15:51,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:15:51,071 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:15:51,071 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:15:51,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d0e75-db99-48c1-a1e1-d8e1fb9e157b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-12-14 11:15:53,752 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:15:53,905 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:15:53,905 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d0e75-db99-48c1-a1e1-d8e1fb9e157b/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-12-14 11:15:53,912 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d0e75-db99-48c1-a1e1-d8e1fb9e157b/bin/utaipan-gh47qXpMRh/data/41d49dfb9/2c5f53b46e424521b1633016873010e1/FLAG6b70332ee [2022-12-14 11:15:53,921 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d0e75-db99-48c1-a1e1-d8e1fb9e157b/bin/utaipan-gh47qXpMRh/data/41d49dfb9/2c5f53b46e424521b1633016873010e1 [2022-12-14 11:15:53,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:15:53,924 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:15:53,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:15:53,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:15:53,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:15:53,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:15:53" (1/1) ... [2022-12-14 11:15:53,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32c2acaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:53, skipping insertion in model container [2022-12-14 11:15:53,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:15:53" (1/1) ... [2022-12-14 11:15:53,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:15:53,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:15:54,099 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_9e4d0e75-db99-48c1-a1e1-d8e1fb9e157b/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7107,7120] [2022-12-14 11:15:54,132 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:15:54,141 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:15:54,173 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_9e4d0e75-db99-48c1-a1e1-d8e1fb9e157b/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7107,7120] [2022-12-14 11:15:54,193 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:15:54,205 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:15:54,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:54 WrapperNode [2022-12-14 11:15:54,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:15:54,206 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:15:54,207 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:15:54,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:15:54,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:54" (1/1) ... [2022-12-14 11:15:54,219 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:54" (1/1) ... [2022-12-14 11:15:54,241 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 636 [2022-12-14 11:15:54,242 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:15:54,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:15:54,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:15:54,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:15:54,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:54" (1/1) ... [2022-12-14 11:15:54,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:54" (1/1) ... [2022-12-14 11:15:54,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:54" (1/1) ... [2022-12-14 11:15:54,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:54" (1/1) ... [2022-12-14 11:15:54,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:54" (1/1) ... [2022-12-14 11:15:54,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:54" (1/1) ... [2022-12-14 11:15:54,263 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:54" (1/1) ... [2022-12-14 11:15:54,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:54" (1/1) ... [2022-12-14 11:15:54,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:15:54,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:15:54,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:15:54,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:15:54,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:54" (1/1) ... [2022-12-14 11:15:54,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:15:54,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d0e75-db99-48c1-a1e1-d8e1fb9e157b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:15:54,292 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d0e75-db99-48c1-a1e1-d8e1fb9e157b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:15:54,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d0e75-db99-48c1-a1e1-d8e1fb9e157b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:15:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:15:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:15:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:15:54,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:15:54,424 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:15:54,425 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:15:54,897 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:15:55,071 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:15:55,071 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 11:15:55,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:15:55 BoogieIcfgContainer [2022-12-14 11:15:55,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:15:55,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:15:55,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:15:55,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:15:55,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:15:53" (1/3) ... [2022-12-14 11:15:55,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e053237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:15:55, skipping insertion in model container [2022-12-14 11:15:55,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:54" (2/3) ... [2022-12-14 11:15:55,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e053237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:15:55, skipping insertion in model container [2022-12-14 11:15:55,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:15:55" (3/3) ... [2022-12-14 11:15:55,082 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-12-14 11:15:55,100 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:15:55,100 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:15:55,150 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:15:55,156 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;@668554d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:15:55,156 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:15:55,159 INFO L276 IsEmpty]: Start isEmpty. Operand has 122 states, 120 states have (on average 1.7083333333333333) internal successors, (205), 121 states have internal predecessors, (205), 0 states have call successors, (0), 0 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 11:15:55,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 11:15:55,165 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:55,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:55,166 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:55,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:55,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1610179573, now seen corresponding path program 1 times [2022-12-14 11:15:55,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:55,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649798080] [2022-12-14 11:15:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:55,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:55,514 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 11:15:55,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:55,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649798080] [2022-12-14 11:15:55,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649798080] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:55,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:55,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:15:55,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057929387] [2022-12-14 11:15:55,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:55,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:15:55,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:55,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:15:55,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:15:55,543 INFO L87 Difference]: Start difference. First operand has 122 states, 120 states have (on average 1.7083333333333333) internal successors, (205), 121 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:55,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:55,809 INFO L93 Difference]: Finished difference Result 371 states and 594 transitions. [2022-12-14 11:15:55,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:15:55,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-12-14 11:15:55,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:55,823 INFO L225 Difference]: With dead ends: 371 [2022-12-14 11:15:55,823 INFO L226 Difference]: Without dead ends: 296 [2022-12-14 11:15:55,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:15:55,829 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 459 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:55,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 717 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:15:55,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-12-14 11:15:55,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 290. [2022-12-14 11:15:55,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.3840830449826989) internal successors, (400), 289 states have internal predecessors, (400), 0 states have call successors, (0), 0 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 11:15:55,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 400 transitions. [2022-12-14 11:15:55,912 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 400 transitions. Word has length 52 [2022-12-14 11:15:55,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:55,912 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 400 transitions. [2022-12-14 11:15:55,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:55,912 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 400 transitions. [2022-12-14 11:15:55,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 11:15:55,913 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:55,914 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] [2022-12-14 11:15:55,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:15:55,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:55,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:55,915 INFO L85 PathProgramCache]: Analyzing trace with hash 958515962, now seen corresponding path program 1 times [2022-12-14 11:15:55,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:55,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836932466] [2022-12-14 11:15:55,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:55,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:56,007 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 11:15:56,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:56,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836932466] [2022-12-14 11:15:56,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836932466] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:56,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:56,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:15:56,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080660186] [2022-12-14 11:15:56,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:56,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:15:56,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:56,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:15:56,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:15:56,011 INFO L87 Difference]: Start difference. First operand 290 states and 400 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 11:15:56,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:56,242 INFO L93 Difference]: Finished difference Result 690 states and 982 transitions. [2022-12-14 11:15:56,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:15:56,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2022-12-14 11:15:56,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:56,245 INFO L225 Difference]: With dead ends: 690 [2022-12-14 11:15:56,245 INFO L226 Difference]: Without dead ends: 445 [2022-12-14 11:15:56,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:15:56,248 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 419 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:56,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 167 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:15:56,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-12-14 11:15:56,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 443. [2022-12-14 11:15:56,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.416289592760181) internal successors, (626), 442 states have internal predecessors, (626), 0 states have call successors, (0), 0 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 11:15:56,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 626 transitions. [2022-12-14 11:15:56,318 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 626 transitions. Word has length 53 [2022-12-14 11:15:56,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:56,318 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 626 transitions. [2022-12-14 11:15:56,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 11:15:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 626 transitions. [2022-12-14 11:15:56,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 11:15:56,320 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:56,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:56,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 11:15:56,320 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:56,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:56,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1364861864, now seen corresponding path program 1 times [2022-12-14 11:15:56,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:56,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908042233] [2022-12-14 11:15:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:56,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:15:56,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:56,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908042233] [2022-12-14 11:15:56,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908042233] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:56,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:56,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:15:56,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137580682] [2022-12-14 11:15:56,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:56,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:15:56,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:56,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:15:56,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:15:56,444 INFO L87 Difference]: Start difference. First operand 443 states and 626 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 11:15:56,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:56,691 INFO L93 Difference]: Finished difference Result 1099 states and 1596 transitions. [2022-12-14 11:15:56,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:15:56,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2022-12-14 11:15:56,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:56,695 INFO L225 Difference]: With dead ends: 1099 [2022-12-14 11:15:56,695 INFO L226 Difference]: Without dead ends: 751 [2022-12-14 11:15:56,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:15:56,697 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 391 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:56,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 183 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:15:56,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-12-14 11:15:56,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 749. [2022-12-14 11:15:56,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.4411764705882353) internal successors, (1078), 748 states have internal predecessors, (1078), 0 states have call successors, (0), 0 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 11:15:56,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1078 transitions. [2022-12-14 11:15:56,807 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1078 transitions. Word has length 53 [2022-12-14 11:15:56,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:56,808 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 1078 transitions. [2022-12-14 11:15:56,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 11:15:56,808 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1078 transitions. [2022-12-14 11:15:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 11:15:56,810 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:56,810 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] [2022-12-14 11:15:56,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 11:15:56,810 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:56,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:56,811 INFO L85 PathProgramCache]: Analyzing trace with hash -980512119, now seen corresponding path program 1 times [2022-12-14 11:15:56,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:56,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438540750] [2022-12-14 11:15:56,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:56,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:56,901 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 11:15:56,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:56,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438540750] [2022-12-14 11:15:56,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438540750] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:56,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:56,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:15:56,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036176865] [2022-12-14 11:15:56,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:56,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:15:56,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:56,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:15:56,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:15:56,904 INFO L87 Difference]: Start difference. First operand 749 states and 1078 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 11:15:57,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:57,209 INFO L93 Difference]: Finished difference Result 2044 states and 2993 transitions. [2022-12-14 11:15:57,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:15:57,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2022-12-14 11:15:57,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:57,214 INFO L225 Difference]: With dead ends: 2044 [2022-12-14 11:15:57,215 INFO L226 Difference]: Without dead ends: 1363 [2022-12-14 11:15:57,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:15:57,217 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 396 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:57,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 175 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:15:57,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2022-12-14 11:15:57,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1361. [2022-12-14 11:15:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 1.451470588235294) internal successors, (1974), 1360 states have internal predecessors, (1974), 0 states have call successors, (0), 0 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 11:15:57,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 1974 transitions. [2022-12-14 11:15:57,380 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 1974 transitions. Word has length 53 [2022-12-14 11:15:57,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:57,380 INFO L495 AbstractCegarLoop]: Abstraction has 1361 states and 1974 transitions. [2022-12-14 11:15:57,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 11:15:57,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 1974 transitions. [2022-12-14 11:15:57,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 11:15:57,381 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:57,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:57,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 11:15:57,381 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:57,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:57,382 INFO L85 PathProgramCache]: Analyzing trace with hash 625335487, now seen corresponding path program 1 times [2022-12-14 11:15:57,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:57,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666355930] [2022-12-14 11:15:57,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:57,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:58,335 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 11:15:58,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:58,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666355930] [2022-12-14 11:15:58,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666355930] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:58,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:58,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-12-14 11:15:58,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502269645] [2022-12-14 11:15:58,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:58,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 11:15:58,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:58,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 11:15:58,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-12-14 11:15:58,338 INFO L87 Difference]: Start difference. First operand 1361 states and 1974 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:59,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:59,208 INFO L93 Difference]: Finished difference Result 3055 states and 4441 transitions. [2022-12-14 11:15:59,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 11:15:59,208 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-12-14 11:15:59,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:59,213 INFO L225 Difference]: With dead ends: 3055 [2022-12-14 11:15:59,213 INFO L226 Difference]: Without dead ends: 2389 [2022-12-14 11:15:59,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2022-12-14 11:15:59,216 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 592 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:59,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 1396 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:15:59,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2022-12-14 11:15:59,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 1810. [2022-12-14 11:15:59,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 1.4422332780541736) internal successors, (2609), 1809 states have internal predecessors, (2609), 0 states have call successors, (0), 0 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 11:15:59,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 2609 transitions. [2022-12-14 11:15:59,448 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 2609 transitions. Word has length 54 [2022-12-14 11:15:59,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:59,448 INFO L495 AbstractCegarLoop]: Abstraction has 1810 states and 2609 transitions. [2022-12-14 11:15:59,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:15:59,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 2609 transitions. [2022-12-14 11:15:59,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 11:15:59,449 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:59,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:59,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 11:15:59,449 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:59,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:59,449 INFO L85 PathProgramCache]: Analyzing trace with hash 888282239, now seen corresponding path program 1 times [2022-12-14 11:15:59,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:59,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312010705] [2022-12-14 11:15:59,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:59,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:16:00,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:00,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312010705] [2022-12-14 11:16:00,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312010705] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:00,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:16:00,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-12-14 11:16:00,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529762112] [2022-12-14 11:16:00,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:00,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 11:16:00,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:00,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 11:16:00,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-12-14 11:16:00,624 INFO L87 Difference]: Start difference. First operand 1810 states and 2609 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:02,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:02,039 INFO L93 Difference]: Finished difference Result 2150 states and 3090 transitions. [2022-12-14 11:16:02,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 11:16:02,039 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-12-14 11:16:02,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:02,044 INFO L225 Difference]: With dead ends: 2150 [2022-12-14 11:16:02,044 INFO L226 Difference]: Without dead ends: 2148 [2022-12-14 11:16:02,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 11:16:02,046 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 675 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:02,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 1325 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1695 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 11:16:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2022-12-14 11:16:02,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 2001. [2022-12-14 11:16:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 2000 states have (on average 1.439) internal successors, (2878), 2000 states have internal predecessors, (2878), 0 states have call successors, (0), 0 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 11:16:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 2878 transitions. [2022-12-14 11:16:02,246 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 2878 transitions. Word has length 54 [2022-12-14 11:16:02,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:02,246 INFO L495 AbstractCegarLoop]: Abstraction has 2001 states and 2878 transitions. [2022-12-14 11:16:02,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 2878 transitions. [2022-12-14 11:16:02,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 11:16:02,246 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:02,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:16:02,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 11:16:02,247 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:02,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:02,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1661556895, now seen corresponding path program 1 times [2022-12-14 11:16:02,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:02,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204582967] [2022-12-14 11:16:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:02,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:02,894 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 11:16:02,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:02,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204582967] [2022-12-14 11:16:02,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204582967] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:02,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:16:02,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-12-14 11:16:02,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975587840] [2022-12-14 11:16:02,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:02,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 11:16:02,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:02,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 11:16:02,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-12-14 11:16:02,896 INFO L87 Difference]: Start difference. First operand 2001 states and 2878 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:03,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:03,815 INFO L93 Difference]: Finished difference Result 3024 states and 4350 transitions. [2022-12-14 11:16:03,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 11:16:03,816 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-12-14 11:16:03,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:03,821 INFO L225 Difference]: With dead ends: 3024 [2022-12-14 11:16:03,821 INFO L226 Difference]: Without dead ends: 2670 [2022-12-14 11:16:03,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-12-14 11:16:03,822 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 572 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 1226 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 11:16:03,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 1226 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:16:03,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2022-12-14 11:16:04,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 2321. [2022-12-14 11:16:04,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2320 states have (on average 1.4370689655172413) internal successors, (3334), 2320 states have internal predecessors, (3334), 0 states have call successors, (0), 0 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 11:16:04,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 3334 transitions. [2022-12-14 11:16:04,078 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 3334 transitions. Word has length 54 [2022-12-14 11:16:04,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:04,078 INFO L495 AbstractCegarLoop]: Abstraction has 2321 states and 3334 transitions. [2022-12-14 11:16:04,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:04,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 3334 transitions. [2022-12-14 11:16:04,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 11:16:04,079 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:04,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:16:04,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 11:16:04,079 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:04,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:04,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1653046243, now seen corresponding path program 1 times [2022-12-14 11:16:04,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:04,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18417828] [2022-12-14 11:16:04,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:04,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:04,126 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 11:16:04,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:04,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18417828] [2022-12-14 11:16:04,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18417828] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:04,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:16:04,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:16:04,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891726584] [2022-12-14 11:16:04,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:04,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:16:04,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:04,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:16:04,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:16:04,128 INFO L87 Difference]: Start difference. First operand 2321 states and 3334 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:04,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:04,478 INFO L93 Difference]: Finished difference Result 3635 states and 5255 transitions. [2022-12-14 11:16:04,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:16:04,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-12-14 11:16:04,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:04,491 INFO L225 Difference]: With dead ends: 3635 [2022-12-14 11:16:04,491 INFO L226 Difference]: Without dead ends: 2321 [2022-12-14 11:16:04,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:16:04,494 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 341 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:04,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 130 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:16:04,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2022-12-14 11:16:04,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 2321. [2022-12-14 11:16:04,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2320 states have (on average 1.4366379310344828) internal successors, (3333), 2320 states have internal predecessors, (3333), 0 states have call successors, (0), 0 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 11:16:04,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 3333 transitions. [2022-12-14 11:16:04,867 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 3333 transitions. Word has length 54 [2022-12-14 11:16:04,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:04,868 INFO L495 AbstractCegarLoop]: Abstraction has 2321 states and 3333 transitions. [2022-12-14 11:16:04,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:04,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 3333 transitions. [2022-12-14 11:16:04,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 11:16:04,869 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:04,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:16:04,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 11:16:04,869 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:04,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:04,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1947993939, now seen corresponding path program 1 times [2022-12-14 11:16:04,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:04,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088990055] [2022-12-14 11:16:04,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:04,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:05,529 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 11:16:05,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:05,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088990055] [2022-12-14 11:16:05,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088990055] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:05,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:16:05,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-12-14 11:16:05,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264432142] [2022-12-14 11:16:05,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:05,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 11:16:05,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:05,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 11:16:05,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-12-14 11:16:05,531 INFO L87 Difference]: Start difference. First operand 2321 states and 3333 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:06,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:06,386 INFO L93 Difference]: Finished difference Result 4548 states and 6595 transitions. [2022-12-14 11:16:06,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 11:16:06,387 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-12-14 11:16:06,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:06,395 INFO L225 Difference]: With dead ends: 4548 [2022-12-14 11:16:06,395 INFO L226 Difference]: Without dead ends: 4546 [2022-12-14 11:16:06,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-12-14 11:16:06,396 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 456 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:06,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 1779 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:16:06,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4546 states. [2022-12-14 11:16:06,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4546 to 3390. [2022-12-14 11:16:06,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3390 states, 3389 states have (on average 1.44408380053113) internal successors, (4894), 3389 states have internal predecessors, (4894), 0 states have call successors, (0), 0 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 11:16:06,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3390 states to 3390 states and 4894 transitions. [2022-12-14 11:16:06,777 INFO L78 Accepts]: Start accepts. Automaton has 3390 states and 4894 transitions. Word has length 55 [2022-12-14 11:16:06,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:06,777 INFO L495 AbstractCegarLoop]: Abstraction has 3390 states and 4894 transitions. [2022-12-14 11:16:06,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:06,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3390 states and 4894 transitions. [2022-12-14 11:16:06,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 11:16:06,778 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:06,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:16:06,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 11:16:06,778 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:06,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:06,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1734606899, now seen corresponding path program 1 times [2022-12-14 11:16:06,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:06,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617246151] [2022-12-14 11:16:06,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:06,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:07,585 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 11:16:07,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:07,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617246151] [2022-12-14 11:16:07,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617246151] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:07,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:16:07,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-12-14 11:16:07,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330536553] [2022-12-14 11:16:07,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:07,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 11:16:07,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:07,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 11:16:07,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-12-14 11:16:07,587 INFO L87 Difference]: Start difference. First operand 3390 states and 4894 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:09,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:09,415 INFO L93 Difference]: Finished difference Result 3917 states and 5638 transitions. [2022-12-14 11:16:09,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 11:16:09,416 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-12-14 11:16:09,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:09,437 INFO L225 Difference]: With dead ends: 3917 [2022-12-14 11:16:09,437 INFO L226 Difference]: Without dead ends: 3915 [2022-12-14 11:16:09,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 11:16:09,438 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 744 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:09,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [744 Valid, 1421 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1700 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 11:16:09,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3915 states. [2022-12-14 11:16:09,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3915 to 3392. [2022-12-14 11:16:09,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3392 states, 3391 states have (on average 1.4438218814508994) internal successors, (4896), 3391 states have internal predecessors, (4896), 0 states have call successors, (0), 0 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 11:16:09,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3392 states to 3392 states and 4896 transitions. [2022-12-14 11:16:09,840 INFO L78 Accepts]: Start accepts. Automaton has 3392 states and 4896 transitions. Word has length 56 [2022-12-14 11:16:09,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:09,840 INFO L495 AbstractCegarLoop]: Abstraction has 3392 states and 4896 transitions. [2022-12-14 11:16:09,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:09,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3392 states and 4896 transitions. [2022-12-14 11:16:09,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 11:16:09,841 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:09,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:16:09,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 11:16:09,842 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:09,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:09,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1787085741, now seen corresponding path program 1 times [2022-12-14 11:16:09,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:09,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619820310] [2022-12-14 11:16:09,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:09,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:10,914 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 11:16:10,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:10,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619820310] [2022-12-14 11:16:10,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619820310] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:10,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:16:10,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-12-14 11:16:10,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682540348] [2022-12-14 11:16:10,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:10,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 11:16:10,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:10,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 11:16:10,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-12-14 11:16:10,916 INFO L87 Difference]: Start difference. First operand 3392 states and 4896 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:12,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:12,974 INFO L93 Difference]: Finished difference Result 4432 states and 6387 transitions. [2022-12-14 11:16:12,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 11:16:12,975 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-12-14 11:16:12,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:12,982 INFO L225 Difference]: With dead ends: 4432 [2022-12-14 11:16:12,982 INFO L226 Difference]: Without dead ends: 4078 [2022-12-14 11:16:12,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 11:16:12,984 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 893 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 1868 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:12,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [893 Valid, 1441 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1868 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 11:16:12,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4078 states. [2022-12-14 11:16:13,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4078 to 3392. [2022-12-14 11:16:13,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3392 states, 3391 states have (on average 1.4438218814508994) internal successors, (4896), 3391 states have internal predecessors, (4896), 0 states have call successors, (0), 0 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 11:16:13,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3392 states to 3392 states and 4896 transitions. [2022-12-14 11:16:13,413 INFO L78 Accepts]: Start accepts. Automaton has 3392 states and 4896 transitions. Word has length 56 [2022-12-14 11:16:13,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:13,413 INFO L495 AbstractCegarLoop]: Abstraction has 3392 states and 4896 transitions. [2022-12-14 11:16:13,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:13,413 INFO L276 IsEmpty]: Start isEmpty. Operand 3392 states and 4896 transitions. [2022-12-14 11:16:13,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 11:16:13,414 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:13,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:16:13,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 11:16:13,414 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:13,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:13,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1110967315, now seen corresponding path program 1 times [2022-12-14 11:16:13,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:13,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399104528] [2022-12-14 11:16:13,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:13,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:14,157 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 11:16:14,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:14,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399104528] [2022-12-14 11:16:14,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399104528] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:14,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:16:14,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-12-14 11:16:14,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242818846] [2022-12-14 11:16:14,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:14,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 11:16:14,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:14,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 11:16:14,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-12-14 11:16:14,159 INFO L87 Difference]: Start difference. First operand 3392 states and 4896 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:15,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:15,290 INFO L93 Difference]: Finished difference Result 3936 states and 5658 transitions. [2022-12-14 11:16:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 11:16:15,291 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-12-14 11:16:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:15,296 INFO L225 Difference]: With dead ends: 3936 [2022-12-14 11:16:15,296 INFO L226 Difference]: Without dead ends: 3934 [2022-12-14 11:16:15,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2022-12-14 11:16:15,297 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 405 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:15,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 1426 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:16:15,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3934 states. [2022-12-14 11:16:15,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3934 to 3402. [2022-12-14 11:16:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3401 states have (on average 1.4431049691267275) internal successors, (4908), 3401 states have internal predecessors, (4908), 0 states have call successors, (0), 0 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 11:16:15,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 4908 transitions. [2022-12-14 11:16:15,889 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 4908 transitions. Word has length 56 [2022-12-14 11:16:15,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:15,890 INFO L495 AbstractCegarLoop]: Abstraction has 3402 states and 4908 transitions. [2022-12-14 11:16:15,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:15,890 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 4908 transitions. [2022-12-14 11:16:15,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 11:16:15,891 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:15,891 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] [2022-12-14 11:16:15,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 11:16:15,891 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:15,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:15,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1495790335, now seen corresponding path program 1 times [2022-12-14 11:16:15,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:15,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284724125] [2022-12-14 11:16:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:15,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:15,915 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 11:16:15,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:15,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284724125] [2022-12-14 11:16:15,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284724125] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:15,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:16:15,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:16:15,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229605151] [2022-12-14 11:16:15,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:15,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:16:15,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:15,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:16:15,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:16:15,916 INFO L87 Difference]: Start difference. First operand 3402 states and 4908 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 11:16:16,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:16,733 INFO L93 Difference]: Finished difference Result 5937 states and 8613 transitions. [2022-12-14 11:16:16,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:16:16,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2022-12-14 11:16:16,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:16,738 INFO L225 Difference]: With dead ends: 5937 [2022-12-14 11:16:16,738 INFO L226 Difference]: Without dead ends: 3333 [2022-12-14 11:16:16,741 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 11:16:16,741 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 96 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:16,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 267 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:16:16,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3333 states. [2022-12-14 11:16:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3333 to 3273. [2022-12-14 11:16:17,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3273 states, 3272 states have (on average 1.440403422982885) internal successors, (4713), 3272 states have internal predecessors, (4713), 0 states have call successors, (0), 0 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 11:16:17,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3273 states to 3273 states and 4713 transitions. [2022-12-14 11:16:17,351 INFO L78 Accepts]: Start accepts. Automaton has 3273 states and 4713 transitions. Word has length 57 [2022-12-14 11:16:17,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:17,351 INFO L495 AbstractCegarLoop]: Abstraction has 3273 states and 4713 transitions. [2022-12-14 11:16:17,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 11:16:17,351 INFO L276 IsEmpty]: Start isEmpty. Operand 3273 states and 4713 transitions. [2022-12-14 11:16:17,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 11:16:17,352 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:17,352 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] [2022-12-14 11:16:17,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 11:16:17,352 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:17,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:17,353 INFO L85 PathProgramCache]: Analyzing trace with hash -434534961, now seen corresponding path program 1 times [2022-12-14 11:16:17,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:17,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428761774] [2022-12-14 11:16:17,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:17,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:17,385 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 11:16:17,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:17,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428761774] [2022-12-14 11:16:17,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428761774] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:17,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:16:17,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:16:17,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474999944] [2022-12-14 11:16:17,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:17,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:16:17,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:17,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:16:17,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:16:17,387 INFO L87 Difference]: Start difference. First operand 3273 states and 4713 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 11:16:17,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:17,990 INFO L93 Difference]: Finished difference Result 5334 states and 7723 transitions. [2022-12-14 11:16:17,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:16:17,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2022-12-14 11:16:17,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:17,994 INFO L225 Difference]: With dead ends: 5334 [2022-12-14 11:16:17,994 INFO L226 Difference]: Without dead ends: 3127 [2022-12-14 11:16:17,996 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 11:16:17,996 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 100 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:17,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 255 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:16:17,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3127 states. [2022-12-14 11:16:18,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3127 to 3125. [2022-12-14 11:16:18,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3125 states, 3124 states have (on average 1.4388604353393086) internal successors, (4495), 3124 states have internal predecessors, (4495), 0 states have call successors, (0), 0 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 11:16:18,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 4495 transitions. [2022-12-14 11:16:18,410 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 4495 transitions. Word has length 57 [2022-12-14 11:16:18,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:18,410 INFO L495 AbstractCegarLoop]: Abstraction has 3125 states and 4495 transitions. [2022-12-14 11:16:18,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 11:16:18,410 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 4495 transitions. [2022-12-14 11:16:18,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 11:16:18,410 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:18,411 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] [2022-12-14 11:16:18,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 11:16:18,411 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:18,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:18,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1891723039, now seen corresponding path program 1 times [2022-12-14 11:16:18,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:18,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525153025] [2022-12-14 11:16:18,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:18,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:19,413 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 11:16:19,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:19,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525153025] [2022-12-14 11:16:19,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525153025] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:19,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:16:19,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-12-14 11:16:19,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097256312] [2022-12-14 11:16:19,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:19,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 11:16:19,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:19,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 11:16:19,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-12-14 11:16:19,416 INFO L87 Difference]: Start difference. First operand 3125 states and 4495 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 11:16:21,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:21,939 INFO L93 Difference]: Finished difference Result 4673 states and 6751 transitions. [2022-12-14 11:16:21,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 11:16:21,940 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2022-12-14 11:16:21,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:21,945 INFO L225 Difference]: With dead ends: 4673 [2022-12-14 11:16:21,945 INFO L226 Difference]: Without dead ends: 4055 [2022-12-14 11:16:21,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=285, Invalid=1197, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 11:16:21,946 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 683 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 2094 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 1732 SdHoareTripleChecker+Invalid, 2106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:21,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 1732 Invalid, 2106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2094 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 11:16:21,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4055 states. [2022-12-14 11:16:22,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4055 to 3109. [2022-12-14 11:16:22,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3109 states, 3108 states have (on average 1.4407979407979408) internal successors, (4478), 3108 states have internal predecessors, (4478), 0 states have call successors, (0), 0 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 11:16:22,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 4478 transitions. [2022-12-14 11:16:22,494 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 4478 transitions. Word has length 57 [2022-12-14 11:16:22,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:22,494 INFO L495 AbstractCegarLoop]: Abstraction has 3109 states and 4478 transitions. [2022-12-14 11:16:22,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 11:16:22,494 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 4478 transitions. [2022-12-14 11:16:22,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 11:16:22,494 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:22,494 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] [2022-12-14 11:16:22,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 11:16:22,495 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:22,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:22,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1628776287, now seen corresponding path program 1 times [2022-12-14 11:16:22,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:22,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052347073] [2022-12-14 11:16:22,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:22,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:23,375 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 11:16:23,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:23,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052347073] [2022-12-14 11:16:23,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052347073] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:23,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:16:23,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-12-14 11:16:23,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529809339] [2022-12-14 11:16:23,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:23,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 11:16:23,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:23,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 11:16:23,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-12-14 11:16:23,377 INFO L87 Difference]: Start difference. First operand 3109 states and 4478 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 11:16:25,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:25,799 INFO L93 Difference]: Finished difference Result 4335 states and 6239 transitions. [2022-12-14 11:16:25,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 11:16:25,800 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2022-12-14 11:16:25,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:25,805 INFO L225 Difference]: With dead ends: 4335 [2022-12-14 11:16:25,805 INFO L226 Difference]: Without dead ends: 4333 [2022-12-14 11:16:25,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=260, Invalid=1146, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 11:16:25,806 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 820 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 2133 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 1716 SdHoareTripleChecker+Invalid, 2139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:25,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 1716 Invalid, 2139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2133 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 11:16:25,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2022-12-14 11:16:26,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3109. [2022-12-14 11:16:26,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3109 states, 3108 states have (on average 1.4407979407979408) internal successors, (4478), 3108 states have internal predecessors, (4478), 0 states have call successors, (0), 0 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 11:16:26,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 4478 transitions. [2022-12-14 11:16:26,290 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 4478 transitions. Word has length 57 [2022-12-14 11:16:26,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:26,290 INFO L495 AbstractCegarLoop]: Abstraction has 3109 states and 4478 transitions. [2022-12-14 11:16:26,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 11:16:26,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 4478 transitions. [2022-12-14 11:16:26,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 11:16:26,291 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:26,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:16:26,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 11:16:26,291 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:26,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:26,292 INFO L85 PathProgramCache]: Analyzing trace with hash -855501631, now seen corresponding path program 1 times [2022-12-14 11:16:26,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:26,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141758174] [2022-12-14 11:16:26,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:26,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:26,825 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 11:16:26,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:26,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141758174] [2022-12-14 11:16:26,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141758174] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:26,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:16:26,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-12-14 11:16:26,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996604170] [2022-12-14 11:16:26,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:26,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 11:16:26,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:26,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 11:16:26,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-12-14 11:16:26,827 INFO L87 Difference]: Start difference. First operand 3109 states and 4478 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 11:16:28,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:28,336 INFO L93 Difference]: Finished difference Result 5771 states and 8346 transitions. [2022-12-14 11:16:28,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 11:16:28,337 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2022-12-14 11:16:28,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:28,346 INFO L225 Difference]: With dead ends: 5771 [2022-12-14 11:16:28,346 INFO L226 Difference]: Without dead ends: 5097 [2022-12-14 11:16:28,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-12-14 11:16:28,349 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 476 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:28,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 1169 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:16:28,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5097 states. [2022-12-14 11:16:28,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5097 to 2795. [2022-12-14 11:16:28,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2794 states have (on average 1.4352183249821044) internal successors, (4010), 2794 states have internal predecessors, (4010), 0 states have call successors, (0), 0 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 11:16:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 4010 transitions. [2022-12-14 11:16:28,861 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 4010 transitions. Word has length 57 [2022-12-14 11:16:28,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:28,861 INFO L495 AbstractCegarLoop]: Abstraction has 2795 states and 4010 transitions. [2022-12-14 11:16:28,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 11:16:28,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 4010 transitions. [2022-12-14 11:16:28,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 11:16:28,862 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:28,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:16:28,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 11:16:28,862 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:28,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:28,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1614820665, now seen corresponding path program 1 times [2022-12-14 11:16:28,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:28,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183110849] [2022-12-14 11:16:28,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:28,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:30,503 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 11:16:30,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:30,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183110849] [2022-12-14 11:16:30,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183110849] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:30,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:16:30,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-12-14 11:16:30,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616982515] [2022-12-14 11:16:30,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:30,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 11:16:30,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:30,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 11:16:30,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2022-12-14 11:16:30,504 INFO L87 Difference]: Start difference. First operand 2795 states and 4010 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:34,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:34,920 INFO L93 Difference]: Finished difference Result 3170 states and 4518 transitions. [2022-12-14 11:16:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 11:16:34,921 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-12-14 11:16:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:34,928 INFO L225 Difference]: With dead ends: 3170 [2022-12-14 11:16:34,928 INFO L226 Difference]: Without dead ends: 3168 [2022-12-14 11:16:34,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=474, Invalid=1976, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 11:16:34,929 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 947 mSDsluCounter, 1698 mSDsCounter, 0 mSdLazyCounter, 3232 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 1825 SdHoareTripleChecker+Invalid, 3241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 3232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:34,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [947 Valid, 1825 Invalid, 3241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 3232 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 11:16:34,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2022-12-14 11:16:35,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 2795. [2022-12-14 11:16:35,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2794 states have (on average 1.4352183249821044) internal successors, (4010), 2794 states have internal predecessors, (4010), 0 states have call successors, (0), 0 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 11:16:35,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 4010 transitions. [2022-12-14 11:16:35,462 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 4010 transitions. Word has length 58 [2022-12-14 11:16:35,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:35,463 INFO L495 AbstractCegarLoop]: Abstraction has 2795 states and 4010 transitions. [2022-12-14 11:16:35,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:35,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 4010 transitions. [2022-12-14 11:16:35,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 11:16:35,463 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:35,463 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:16:35,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 11:16:35,464 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:35,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:35,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1373684888, now seen corresponding path program 1 times [2022-12-14 11:16:35,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:35,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679002114] [2022-12-14 11:16:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:35,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:35,487 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 11:16:35,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:35,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679002114] [2022-12-14 11:16:35,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679002114] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:35,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:16:35,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:16:35,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477795802] [2022-12-14 11:16:35,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:35,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:16:35,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:35,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:16:35,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:16:35,488 INFO L87 Difference]: Start difference. First operand 2795 states and 4010 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:36,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:36,054 INFO L93 Difference]: Finished difference Result 5363 states and 7747 transitions. [2022-12-14 11:16:36,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:16:36,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-12-14 11:16:36,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:36,057 INFO L225 Difference]: With dead ends: 5363 [2022-12-14 11:16:36,057 INFO L226 Difference]: Without dead ends: 2673 [2022-12-14 11:16:36,059 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 11:16:36,059 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 91 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:36,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 255 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:16:36,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2022-12-14 11:16:36,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2671. [2022-12-14 11:16:36,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2671 states, 2670 states have (on average 1.4325842696629214) internal successors, (3825), 2670 states have internal predecessors, (3825), 0 states have call successors, (0), 0 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 11:16:36,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2671 states to 2671 states and 3825 transitions. [2022-12-14 11:16:36,600 INFO L78 Accepts]: Start accepts. Automaton has 2671 states and 3825 transitions. Word has length 59 [2022-12-14 11:16:36,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:36,600 INFO L495 AbstractCegarLoop]: Abstraction has 2671 states and 3825 transitions. [2022-12-14 11:16:36,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:36,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2671 states and 3825 transitions. [2022-12-14 11:16:36,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 11:16:36,600 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:36,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:16:36,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 11:16:36,601 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:36,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:36,601 INFO L85 PathProgramCache]: Analyzing trace with hash 907951061, now seen corresponding path program 1 times [2022-12-14 11:16:36,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:36,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51084546] [2022-12-14 11:16:36,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:36,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:37,937 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 11:16:37,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:37,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51084546] [2022-12-14 11:16:37,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51084546] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:37,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:16:37,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-12-14 11:16:37,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459935110] [2022-12-14 11:16:37,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:37,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 11:16:37,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:37,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 11:16:37,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-12-14 11:16:37,939 INFO L87 Difference]: Start difference. First operand 2671 states and 3825 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:40,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:40,851 INFO L93 Difference]: Finished difference Result 3539 states and 5035 transitions. [2022-12-14 11:16:40,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 11:16:40,851 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-12-14 11:16:40,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:40,854 INFO L225 Difference]: With dead ends: 3539 [2022-12-14 11:16:40,854 INFO L226 Difference]: Without dead ends: 3537 [2022-12-14 11:16:40,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=362, Invalid=1530, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 11:16:40,855 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 576 mSDsluCounter, 2899 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 3152 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:40,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 3152 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1898 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 11:16:40,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2022-12-14 11:16:41,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2667. [2022-12-14 11:16:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2667 states, 2666 states have (on average 1.4328582145536384) internal successors, (3820), 2666 states have internal predecessors, (3820), 0 states have call successors, (0), 0 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 11:16:41,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2667 states to 2667 states and 3820 transitions. [2022-12-14 11:16:41,361 INFO L78 Accepts]: Start accepts. Automaton has 2667 states and 3820 transitions. Word has length 59 [2022-12-14 11:16:41,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:41,361 INFO L495 AbstractCegarLoop]: Abstraction has 2667 states and 3820 transitions. [2022-12-14 11:16:41,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:41,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2667 states and 3820 transitions. [2022-12-14 11:16:41,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 11:16:41,362 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:41,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:16:41,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 11:16:41,362 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:41,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:41,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1681225717, now seen corresponding path program 1 times [2022-12-14 11:16:41,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:41,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813391720] [2022-12-14 11:16:41,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:41,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:42,880 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 11:16:42,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:42,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813391720] [2022-12-14 11:16:42,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813391720] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:42,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:16:42,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-12-14 11:16:42,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257831062] [2022-12-14 11:16:42,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:42,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 11:16:42,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:42,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 11:16:42,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-12-14 11:16:42,881 INFO L87 Difference]: Start difference. First operand 2667 states and 3820 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:46,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:46,056 INFO L93 Difference]: Finished difference Result 3593 states and 5146 transitions. [2022-12-14 11:16:46,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 11:16:46,057 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-12-14 11:16:46,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:46,060 INFO L225 Difference]: With dead ends: 3593 [2022-12-14 11:16:46,060 INFO L226 Difference]: Without dead ends: 3271 [2022-12-14 11:16:46,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=411, Invalid=1659, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 11:16:46,061 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 557 mSDsluCounter, 1968 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 2212 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:46,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 2212 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1724 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 11:16:46,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2022-12-14 11:16:46,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 2651. [2022-12-14 11:16:46,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2651 states, 2650 states have (on average 1.4350943396226414) internal successors, (3803), 2650 states have internal predecessors, (3803), 0 states have call successors, (0), 0 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 11:16:46,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 3803 transitions. [2022-12-14 11:16:46,573 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 3803 transitions. Word has length 59 [2022-12-14 11:16:46,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:46,573 INFO L495 AbstractCegarLoop]: Abstraction has 2651 states and 3803 transitions. [2022-12-14 11:16:46,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:46,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 3803 transitions. [2022-12-14 11:16:46,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 11:16:46,573 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:46,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:16:46,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 11:16:46,574 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:46,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:46,574 INFO L85 PathProgramCache]: Analyzing trace with hash 284311477, now seen corresponding path program 1 times [2022-12-14 11:16:46,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:46,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632560460] [2022-12-14 11:16:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:46,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:48,070 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 11:16:48,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:48,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632560460] [2022-12-14 11:16:48,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632560460] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:48,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:16:48,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-12-14 11:16:48,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856982344] [2022-12-14 11:16:48,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:48,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 11:16:48,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:48,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 11:16:48,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-12-14 11:16:48,072 INFO L87 Difference]: Start difference. First operand 2651 states and 3803 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:51,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:51,057 INFO L93 Difference]: Finished difference Result 3140 states and 4485 transitions. [2022-12-14 11:16:51,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 11:16:51,058 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-12-14 11:16:51,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:51,060 INFO L225 Difference]: With dead ends: 3140 [2022-12-14 11:16:51,060 INFO L226 Difference]: Without dead ends: 3138 [2022-12-14 11:16:51,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=377, Invalid=1429, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 11:16:51,061 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 607 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:51,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [607 Valid, 1787 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 11:16:51,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3138 states. [2022-12-14 11:16:51,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3138 to 2825. [2022-12-14 11:16:51,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2824 states have (on average 1.4327195467422096) internal successors, (4046), 2824 states have internal predecessors, (4046), 0 states have call successors, (0), 0 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 11:16:51,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 4046 transitions. [2022-12-14 11:16:51,633 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 4046 transitions. Word has length 59 [2022-12-14 11:16:51,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:51,633 INFO L495 AbstractCegarLoop]: Abstraction has 2825 states and 4046 transitions. [2022-12-14 11:16:51,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:16:51,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 4046 transitions. [2022-12-14 11:16:51,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 11:16:51,634 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:51,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:16:51,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 11:16:51,634 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:51,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:51,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1462131223, now seen corresponding path program 1 times [2022-12-14 11:16:51,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:51,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866320752] [2022-12-14 11:16:51,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:51,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:56,942 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 11:16:56,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:56,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866320752] [2022-12-14 11:16:56,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866320752] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:16:56,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:16:56,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-12-14 11:16:56,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18189861] [2022-12-14 11:16:56,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:16:56,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 11:16:56,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:16:56,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 11:16:56,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 11:16:56,945 INFO L87 Difference]: Start difference. First operand 2825 states and 4046 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:17:05,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:05,503 INFO L93 Difference]: Finished difference Result 3137 states and 4482 transitions. [2022-12-14 11:17:05,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 11:17:05,504 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-12-14 11:17:05,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:05,506 INFO L225 Difference]: With dead ends: 3137 [2022-12-14 11:17:05,507 INFO L226 Difference]: Without dead ends: 3135 [2022-12-14 11:17:05,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=793, Invalid=2989, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 11:17:05,508 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 663 mSDsluCounter, 1807 mSDsCounter, 0 mSdLazyCounter, 3336 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 2033 SdHoareTripleChecker+Invalid, 3337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:05,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 2033 Invalid, 3337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3336 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-14 11:17:05,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2022-12-14 11:17:06,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 2801. [2022-12-14 11:17:06,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2801 states, 2800 states have (on average 1.4357142857142857) internal successors, (4020), 2800 states have internal predecessors, (4020), 0 states have call successors, (0), 0 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 11:17:06,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2801 states to 2801 states and 4020 transitions. [2022-12-14 11:17:06,079 INFO L78 Accepts]: Start accepts. Automaton has 2801 states and 4020 transitions. Word has length 61 [2022-12-14 11:17:06,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:06,079 INFO L495 AbstractCegarLoop]: Abstraction has 2801 states and 4020 transitions. [2022-12-14 11:17:06,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:17:06,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2801 states and 4020 transitions. [2022-12-14 11:17:06,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 11:17:06,079 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:06,080 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:06,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 11:17:06,080 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:06,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:06,080 INFO L85 PathProgramCache]: Analyzing trace with hash 687947099, now seen corresponding path program 1 times [2022-12-14 11:17:06,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:06,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813049981] [2022-12-14 11:17:06,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:06,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:17:06,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:06,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813049981] [2022-12-14 11:17:06,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813049981] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:06,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:17:06,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:17:06,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118591982] [2022-12-14 11:17:06,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:06,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:17:06,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:06,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:17:06,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:17:06,133 INFO L87 Difference]: Start difference. First operand 2801 states and 4020 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 11:17:06,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:06,907 INFO L93 Difference]: Finished difference Result 5011 states and 7296 transitions. [2022-12-14 11:17:06,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:17:06,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2022-12-14 11:17:06,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:06,911 INFO L225 Difference]: With dead ends: 5011 [2022-12-14 11:17:06,911 INFO L226 Difference]: Without dead ends: 3929 [2022-12-14 11:17:06,912 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 11:17:06,912 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 71 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:06,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 312 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:17:06,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3929 states. [2022-12-14 11:17:07,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3929 to 3704. [2022-12-14 11:17:07,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 1.4364029165541452) internal successors, (5319), 3703 states have internal predecessors, (5319), 0 states have call successors, (0), 0 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 11:17:07,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 5319 transitions. [2022-12-14 11:17:07,652 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 5319 transitions. Word has length 63 [2022-12-14 11:17:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:07,652 INFO L495 AbstractCegarLoop]: Abstraction has 3704 states and 5319 transitions. [2022-12-14 11:17:07,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 11:17:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 5319 transitions. [2022-12-14 11:17:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 11:17:07,653 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:07,653 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:07,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 11:17:07,653 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:07,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:07,653 INFO L85 PathProgramCache]: Analyzing trace with hash 571946117, now seen corresponding path program 1 times [2022-12-14 11:17:07,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:07,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61041872] [2022-12-14 11:17:07,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:07,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:17:07,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:07,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61041872] [2022-12-14 11:17:07,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61041872] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:07,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:17:07,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:17:07,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403596777] [2022-12-14 11:17:07,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:07,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:17:07,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:07,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:17:07,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:17:07,729 INFO L87 Difference]: Start difference. First operand 3704 states and 5319 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 11:17:08,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:08,759 INFO L93 Difference]: Finished difference Result 6838 states and 9931 transitions. [2022-12-14 11:17:08,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:17:08,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2022-12-14 11:17:08,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:08,764 INFO L225 Difference]: With dead ends: 6838 [2022-12-14 11:17:08,764 INFO L226 Difference]: Without dead ends: 4868 [2022-12-14 11:17:08,766 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 11:17:08,766 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 67 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:08,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 294 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:17:08,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4868 states. [2022-12-14 11:17:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4868 to 4499. [2022-12-14 11:17:09,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4499 states, 4498 states have (on average 1.4346376167185415) internal successors, (6453), 4498 states have internal predecessors, (6453), 0 states have call successors, (0), 0 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 11:17:09,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4499 states to 4499 states and 6453 transitions. [2022-12-14 11:17:09,629 INFO L78 Accepts]: Start accepts. Automaton has 4499 states and 6453 transitions. Word has length 65 [2022-12-14 11:17:09,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:09,629 INFO L495 AbstractCegarLoop]: Abstraction has 4499 states and 6453 transitions. [2022-12-14 11:17:09,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 11:17:09,629 INFO L276 IsEmpty]: Start isEmpty. Operand 4499 states and 6453 transitions. [2022-12-14 11:17:09,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 11:17:09,630 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:09,630 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:09,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 11:17:09,630 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:09,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:09,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1887839819, now seen corresponding path program 1 times [2022-12-14 11:17:09,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:09,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159618959] [2022-12-14 11:17:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:09,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:17:09,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:09,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159618959] [2022-12-14 11:17:09,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159618959] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:09,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:17:09,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:17:09,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459350702] [2022-12-14 11:17:09,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:09,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:17:09,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:09,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:17:09,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:17:09,682 INFO L87 Difference]: Start difference. First operand 4499 states and 6453 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:17:10,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:10,929 INFO L93 Difference]: Finished difference Result 9389 states and 13578 transitions. [2022-12-14 11:17:10,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:17:10,929 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-12-14 11:17:10,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:10,935 INFO L225 Difference]: With dead ends: 9389 [2022-12-14 11:17:10,935 INFO L226 Difference]: Without dead ends: 6289 [2022-12-14 11:17:10,937 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 11:17:10,937 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 62 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:10,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 275 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:17:10,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6289 states. [2022-12-14 11:17:12,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6289 to 5705. [2022-12-14 11:17:12,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5705 states, 5704 states have (on average 1.4286465638148667) internal successors, (8149), 5704 states have internal predecessors, (8149), 0 states have call successors, (0), 0 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 11:17:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5705 states to 5705 states and 8149 transitions. [2022-12-14 11:17:12,228 INFO L78 Accepts]: Start accepts. Automaton has 5705 states and 8149 transitions. Word has length 68 [2022-12-14 11:17:12,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:12,228 INFO L495 AbstractCegarLoop]: Abstraction has 5705 states and 8149 transitions. [2022-12-14 11:17:12,229 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), 0 states have call successors, (0), 0 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 11:17:12,229 INFO L276 IsEmpty]: Start isEmpty. Operand 5705 states and 8149 transitions. [2022-12-14 11:17:12,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 11:17:12,229 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:12,229 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:12,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-14 11:17:12,229 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:12,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:12,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1583220552, now seen corresponding path program 1 times [2022-12-14 11:17:12,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:12,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341595392] [2022-12-14 11:17:12,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:12,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:17:12,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:12,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341595392] [2022-12-14 11:17:12,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341595392] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:12,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:17:12,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:17:12,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813505976] [2022-12-14 11:17:12,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:12,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:17:12,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:12,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:17:12,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:17:12,291 INFO L87 Difference]: Start difference. First operand 5705 states and 8149 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:17:14,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:14,307 INFO L93 Difference]: Finished difference Result 13898 states and 19954 transitions. [2022-12-14 11:17:14,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:17:14,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-12-14 11:17:14,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:14,315 INFO L225 Difference]: With dead ends: 13898 [2022-12-14 11:17:14,315 INFO L226 Difference]: Without dead ends: 8462 [2022-12-14 11:17:14,318 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 11:17:14,319 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 57 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:14,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 254 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:17:14,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8462 states. [2022-12-14 11:17:15,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8462 to 7679. [2022-12-14 11:17:15,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7679 states, 7678 states have (on average 1.4202917426413129) internal successors, (10905), 7678 states have internal predecessors, (10905), 0 states have call successors, (0), 0 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 11:17:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7679 states to 7679 states and 10905 transitions. [2022-12-14 11:17:15,819 INFO L78 Accepts]: Start accepts. Automaton has 7679 states and 10905 transitions. Word has length 71 [2022-12-14 11:17:15,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:15,819 INFO L495 AbstractCegarLoop]: Abstraction has 7679 states and 10905 transitions. [2022-12-14 11:17:15,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:17:15,819 INFO L276 IsEmpty]: Start isEmpty. Operand 7679 states and 10905 transitions. [2022-12-14 11:17:15,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 11:17:15,821 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:15,821 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 11:17:15,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 11:17:15,821 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:15,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:15,821 INFO L85 PathProgramCache]: Analyzing trace with hash -973034147, now seen corresponding path program 1 times [2022-12-14 11:17:15,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:15,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880027797] [2022-12-14 11:17:15,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:15,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:17:15,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:15,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880027797] [2022-12-14 11:17:15,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880027797] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:15,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:17:15,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:17:15,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275289869] [2022-12-14 11:17:15,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:15,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:17:15,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:15,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:17:15,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:17:15,937 INFO L87 Difference]: Start difference. First operand 7679 states and 10905 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 11:17:21,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:21,272 INFO L93 Difference]: Finished difference Result 29291 states and 41365 transitions. [2022-12-14 11:17:21,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:17:21,273 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 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 85 [2022-12-14 11:17:21,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:21,295 INFO L225 Difference]: With dead ends: 29291 [2022-12-14 11:17:21,295 INFO L226 Difference]: Without dead ends: 22437 [2022-12-14 11:17:21,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:17:21,302 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 997 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:21,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [997 Valid, 292 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:17:21,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22437 states. [2022-12-14 11:17:25,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22437 to 16146. [2022-12-14 11:17:25,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16146 states, 16145 states have (on average 1.3903995044905544) internal successors, (22448), 16145 states have internal predecessors, (22448), 0 states have call successors, (0), 0 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 11:17:25,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16146 states to 16146 states and 22448 transitions. [2022-12-14 11:17:25,557 INFO L78 Accepts]: Start accepts. Automaton has 16146 states and 22448 transitions. Word has length 85 [2022-12-14 11:17:25,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:25,557 INFO L495 AbstractCegarLoop]: Abstraction has 16146 states and 22448 transitions. [2022-12-14 11:17:25,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 11:17:25,557 INFO L276 IsEmpty]: Start isEmpty. Operand 16146 states and 22448 transitions. [2022-12-14 11:17:25,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 11:17:25,559 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:25,559 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 11:17:25,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 11:17:25,559 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:25,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:25,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1938486078, now seen corresponding path program 1 times [2022-12-14 11:17:25,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:25,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139158881] [2022-12-14 11:17:25,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:25,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:26,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:17:26,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:26,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139158881] [2022-12-14 11:17:26,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139158881] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:17:26,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660187116] [2022-12-14 11:17:26,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:26,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:17:26,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d0e75-db99-48c1-a1e1-d8e1fb9e157b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:17:26,781 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d0e75-db99-48c1-a1e1-d8e1fb9e157b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:17:26,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d0e75-db99-48c1-a1e1-d8e1fb9e157b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:17:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:26,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 121 conjunts are in the unsatisfiable core [2022-12-14 11:17:26,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:17:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:17:32,990 INFO L328 TraceCheckSpWp]: Computing backward predicates...