./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_de267b7f-ae85-435f-8250-2cf7dd1715c5/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de267b7f-ae85-435f-8250-2cf7dd1715c5/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de267b7f-ae85-435f-8250-2cf7dd1715c5/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de267b7f-ae85-435f-8250-2cf7dd1715c5/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de267b7f-ae85-435f-8250-2cf7dd1715c5/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de267b7f-ae85-435f-8250-2cf7dd1715c5/bin/utaipan-ByfvJB40ur --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 237919602f057be6bafc5b901424d626990bfa1f459ab937d0f6252d6c0cf13c --- 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-38b53e6 [2022-11-25 22:40:04,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:40:04,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:40:04,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:40:04,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:40:04,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:40:04,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:40:04,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:40:04,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:40:04,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:40:04,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:40:04,237 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:40:04,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:40:04,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:40:04,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:40:04,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:40:04,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:40:04,244 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:40:04,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:40:04,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:40:04,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:40:04,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:40:04,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:40:04,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:40:04,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:40:04,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:40:04,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:40:04,259 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:40:04,260 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:40:04,261 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:40:04,261 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:40:04,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:40:04,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:40:04,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:40:04,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:40:04,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:40:04,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:40:04,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:40:04,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:40:04,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:40:04,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:40:04,270 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de267b7f-ae85-435f-8250-2cf7dd1715c5/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:40:04,306 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:40:04,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:40:04,312 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:40:04,312 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:40:04,313 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:40:04,314 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:40:04,314 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:40:04,314 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:40:04,314 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:40:04,315 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:40:04,316 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:40:04,316 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:40:04,316 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:40:04,317 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:40:04,317 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:40:04,317 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:40:04,318 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:40:04,318 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:40:04,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:40:04,319 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:40:04,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:40:04,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:40:04,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:40:04,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:40:04,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:40:04,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:40:04,322 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:40:04,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:40:04,322 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:40:04,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:40:04,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:40:04,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:40:04,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:40:04,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:40:04,324 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:40:04,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:40:04,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:40:04,325 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:40:04,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:40:04,325 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:40:04,326 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:40:04,327 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_de267b7f-ae85-435f-8250-2cf7dd1715c5/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de267b7f-ae85-435f-8250-2cf7dd1715c5/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 237919602f057be6bafc5b901424d626990bfa1f459ab937d0f6252d6c0cf13c [2022-11-25 22:40:04,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:40:04,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:40:04,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:40:04,718 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:40:04,718 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:40:04,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de267b7f-ae85-435f-8250-2cf7dd1715c5/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2022-11-25 22:40:08,051 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:40:08,290 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:40:08,290 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de267b7f-ae85-435f-8250-2cf7dd1715c5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2022-11-25 22:40:08,302 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de267b7f-ae85-435f-8250-2cf7dd1715c5/bin/utaipan-ByfvJB40ur/data/d49459eef/0a78eb3a416f4771beaf03a6eed9b075/FLAG6d1fcc8c7 [2022-11-25 22:40:08,322 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de267b7f-ae85-435f-8250-2cf7dd1715c5/bin/utaipan-ByfvJB40ur/data/d49459eef/0a78eb3a416f4771beaf03a6eed9b075 [2022-11-25 22:40:08,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:40:08,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:40:08,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:40:08,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:40:08,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:40:08,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:40:08" (1/1) ... [2022-11-25 22:40:08,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32046568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:08, skipping insertion in model container [2022-11-25 22:40:08,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:40:08" (1/1) ... [2022-11-25 22:40:08,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:40:08,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:40:08,785 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_de267b7f-ae85-435f-8250-2cf7dd1715c5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8607,8620] [2022-11-25 22:40:08,934 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:40:08,957 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:40:09,048 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_de267b7f-ae85-435f-8250-2cf7dd1715c5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8607,8620] [2022-11-25 22:40:09,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:40:09,137 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:40:09,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:09 WrapperNode [2022-11-25 22:40:09,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:40:09,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:40:09,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:40:09,142 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:40:09,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:09" (1/1) ... [2022-11-25 22:40:09,179 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:09" (1/1) ... [2022-11-25 22:40:09,240 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 803 [2022-11-25 22:40:09,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:40:09,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:40:09,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:40:09,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:40:09,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:09" (1/1) ... [2022-11-25 22:40:09,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:09" (1/1) ... [2022-11-25 22:40:09,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:09" (1/1) ... [2022-11-25 22:40:09,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:09" (1/1) ... [2022-11-25 22:40:09,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:09" (1/1) ... [2022-11-25 22:40:09,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:09" (1/1) ... [2022-11-25 22:40:09,306 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:09" (1/1) ... [2022-11-25 22:40:09,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:09" (1/1) ... [2022-11-25 22:40:09,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:40:09,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:40:09,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:40:09,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:40:09,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:09" (1/1) ... [2022-11-25 22:40:09,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:40:09,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de267b7f-ae85-435f-8250-2cf7dd1715c5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:40:09,375 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de267b7f-ae85-435f-8250-2cf7dd1715c5/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:40:09,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de267b7f-ae85-435f-8250-2cf7dd1715c5/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:40:09,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:40:09,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:40:09,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:40:09,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:40:09,628 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:40:09,630 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:40:10,642 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:40:10,942 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:40:10,942 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 22:40:10,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:40:10 BoogieIcfgContainer [2022-11-25 22:40:10,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:40:10,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:40:10,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:40:10,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:40:10,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:40:08" (1/3) ... [2022-11-25 22:40:10,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a4c54e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:40:10, skipping insertion in model container [2022-11-25 22:40:10,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:09" (2/3) ... [2022-11-25 22:40:10,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a4c54e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:40:10, skipping insertion in model container [2022-11-25 22:40:10,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:40:10" (3/3) ... [2022-11-25 22:40:10,967 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2022-11-25 22:40:10,991 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:40:10,991 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:40:11,061 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:40:11,067 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;@76667413, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:40:11,068 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:40:11,074 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 163 states have (on average 1.705521472392638) internal successors, (278), 164 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:11,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-25 22:40:11,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:40:11,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:40:11,084 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:40:11,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:40:11,090 INFO L85 PathProgramCache]: Analyzing trace with hash 441315863, now seen corresponding path program 1 times [2022-11-25 22:40:11,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:40:11,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910613785] [2022-11-25 22:40:11,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:11,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:40:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:40:12,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:40:12,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910613785] [2022-11-25 22:40:12,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910613785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:40:12,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:40:12,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:40:12,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997871786] [2022-11-25 22:40:12,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:40:12,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:40:12,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:40:12,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:40:12,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:40:12,117 INFO L87 Difference]: Start difference. First operand has 165 states, 163 states have (on average 1.705521472392638) internal successors, (278), 164 states have internal predecessors, (278), 0 states have call successors, (0), 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 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:12,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:40:12,610 INFO L93 Difference]: Finished difference Result 577 states and 924 transitions. [2022-11-25 22:40:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:40:12,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-25 22:40:12,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:40:12,625 INFO L225 Difference]: With dead ends: 577 [2022-11-25 22:40:12,625 INFO L226 Difference]: Without dead ends: 480 [2022-11-25 22:40:12,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:40:12,632 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 842 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:40:12,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 1146 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:40:12,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-11-25 22:40:12,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 472. [2022-11-25 22:40:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 1.40552016985138) internal successors, (662), 471 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:12,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 662 transitions. [2022-11-25 22:40:12,762 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 662 transitions. Word has length 68 [2022-11-25 22:40:12,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:40:12,763 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 662 transitions. [2022-11-25 22:40:12,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:12,763 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 662 transitions. [2022-11-25 22:40:12,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-25 22:40:12,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:40:12,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:40:12,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:40:12,767 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:40:12,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:40:12,768 INFO L85 PathProgramCache]: Analyzing trace with hash -323387448, now seen corresponding path program 1 times [2022-11-25 22:40:12,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:40:12,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182751448] [2022-11-25 22:40:12,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:12,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:40:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:40:13,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:40:13,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182751448] [2022-11-25 22:40:13,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182751448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:40:13,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:40:13,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:40:13,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055015047] [2022-11-25 22:40:13,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:40:13,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:40:13,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:40:13,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:40:13,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:40:13,074 INFO L87 Difference]: Start difference. First operand 472 states and 662 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:13,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:40:13,581 INFO L93 Difference]: Finished difference Result 1132 states and 1626 transitions. [2022-11-25 22:40:13,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:40:13,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2022-11-25 22:40:13,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:40:13,584 INFO L225 Difference]: With dead ends: 1132 [2022-11-25 22:40:13,585 INFO L226 Difference]: Without dead ends: 702 [2022-11-25 22:40:13,586 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 [2022-11-25 22:40:13,588 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 597 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:40:13,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 224 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:40:13,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-11-25 22:40:13,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 700. [2022-11-25 22:40:13,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 1.4291845493562232) internal successors, (999), 699 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 999 transitions. [2022-11-25 22:40:13,741 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 999 transitions. Word has length 69 [2022-11-25 22:40:13,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:40:13,741 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 999 transitions. [2022-11-25 22:40:13,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:13,741 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 999 transitions. [2022-11-25 22:40:13,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-25 22:40:13,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:40:13,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:40:13,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:40:13,744 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:40:13,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:40:13,744 INFO L85 PathProgramCache]: Analyzing trace with hash 297823703, now seen corresponding path program 1 times [2022-11-25 22:40:13,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:40:13,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328554295] [2022-11-25 22:40:13,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:13,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:40:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:40:13,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:40:13,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328554295] [2022-11-25 22:40:13,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328554295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:40:13,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:40:13,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:40:13,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784831756] [2022-11-25 22:40:13,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:40:13,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:40:13,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:40:13,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:40:13,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:40:13,880 INFO L87 Difference]: Start difference. First operand 700 states and 999 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:14,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:40:14,390 INFO L93 Difference]: Finished difference Result 1847 states and 2690 transitions. [2022-11-25 22:40:14,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:40:14,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2022-11-25 22:40:14,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:40:14,399 INFO L225 Difference]: With dead ends: 1847 [2022-11-25 22:40:14,399 INFO L226 Difference]: Without dead ends: 1205 [2022-11-25 22:40:14,404 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 [2022-11-25 22:40:14,407 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 580 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:40:14,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 232 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:40:14,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2022-11-25 22:40:14,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1203. [2022-11-25 22:40:14,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 1.4467554076539102) internal successors, (1739), 1202 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:14,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1739 transitions. [2022-11-25 22:40:14,681 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1739 transitions. Word has length 69 [2022-11-25 22:40:14,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:40:14,682 INFO L495 AbstractCegarLoop]: Abstraction has 1203 states and 1739 transitions. [2022-11-25 22:40:14,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:14,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1739 transitions. [2022-11-25 22:40:14,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-25 22:40:14,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:40:14,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:40:14,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 22:40:14,689 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:40:14,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:40:14,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1325617626, now seen corresponding path program 1 times [2022-11-25 22:40:14,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:40:14,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166049951] [2022-11-25 22:40:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:14,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:40:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:40:14,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:40:14,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166049951] [2022-11-25 22:40:14,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166049951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:40:14,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:40:14,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:40:14,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945145682] [2022-11-25 22:40:14,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:40:14,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:40:14,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:40:14,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:40:14,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:40:14,843 INFO L87 Difference]: Start difference. First operand 1203 states and 1739 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:15,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:40:15,604 INFO L93 Difference]: Finished difference Result 3333 states and 4883 transitions. [2022-11-25 22:40:15,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:40:15,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2022-11-25 22:40:15,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:40:15,614 INFO L225 Difference]: With dead ends: 3333 [2022-11-25 22:40:15,614 INFO L226 Difference]: Without dead ends: 2211 [2022-11-25 22:40:15,617 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 [2022-11-25 22:40:15,627 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 563 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:40:15,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 240 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:40:15,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2022-11-25 22:40:16,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2209. [2022-11-25 22:40:16,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 1.453804347826087) internal successors, (3210), 2208 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:16,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 3210 transitions. [2022-11-25 22:40:16,106 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 3210 transitions. Word has length 69 [2022-11-25 22:40:16,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:40:16,106 INFO L495 AbstractCegarLoop]: Abstraction has 2209 states and 3210 transitions. [2022-11-25 22:40:16,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:16,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 3210 transitions. [2022-11-25 22:40:16,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-25 22:40:16,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:40:16,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:40:16,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:40:16,108 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:40:16,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:40:16,109 INFO L85 PathProgramCache]: Analyzing trace with hash -589774667, now seen corresponding path program 1 times [2022-11-25 22:40:16,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:40:16,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042368859] [2022-11-25 22:40:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:16,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:40:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:40:16,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:40:16,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042368859] [2022-11-25 22:40:16,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042368859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:40:16,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:40:16,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:40:16,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425872403] [2022-11-25 22:40:16,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:40:16,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:40:16,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:40:16,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:40:16,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:40:16,328 INFO L87 Difference]: Start difference. First operand 2209 states and 3210 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:17,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:40:17,484 INFO L93 Difference]: Finished difference Result 6321 states and 9261 transitions. [2022-11-25 22:40:17,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:40:17,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2022-11-25 22:40:17,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:40:17,503 INFO L225 Difference]: With dead ends: 6321 [2022-11-25 22:40:17,503 INFO L226 Difference]: Without dead ends: 4223 [2022-11-25 22:40:17,506 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 [2022-11-25 22:40:17,507 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 546 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:40:17,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 248 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:40:17,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2022-11-25 22:40:18,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 4221. [2022-11-25 22:40:18,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4221 states, 4220 states have (on average 1.454265402843602) internal successors, (6137), 4220 states have internal predecessors, (6137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:18,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4221 states to 4221 states and 6137 transitions. [2022-11-25 22:40:18,162 INFO L78 Accepts]: Start accepts. Automaton has 4221 states and 6137 transitions. Word has length 69 [2022-11-25 22:40:18,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:40:18,163 INFO L495 AbstractCegarLoop]: Abstraction has 4221 states and 6137 transitions. [2022-11-25 22:40:18,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:18,163 INFO L276 IsEmpty]: Start isEmpty. Operand 4221 states and 6137 transitions. [2022-11-25 22:40:18,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-25 22:40:18,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:40:18,165 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:40:18,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 22:40:18,165 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:40:18,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:40:18,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1683020412, now seen corresponding path program 1 times [2022-11-25 22:40:18,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:40:18,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751916796] [2022-11-25 22:40:18,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:18,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:40:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:40:18,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:40:18,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751916796] [2022-11-25 22:40:18,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751916796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:40:18,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:40:18,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:40:18,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980710932] [2022-11-25 22:40:18,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:40:18,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:40:18,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:40:18,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:40:18,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:40:18,303 INFO L87 Difference]: Start difference. First operand 4221 states and 6137 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:40:20,090 INFO L93 Difference]: Finished difference Result 12323 states and 18005 transitions. [2022-11-25 22:40:20,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:40:20,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2022-11-25 22:40:20,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:40:20,127 INFO L225 Difference]: With dead ends: 12323 [2022-11-25 22:40:20,127 INFO L226 Difference]: Without dead ends: 8247 [2022-11-25 22:40:20,134 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 [2022-11-25 22:40:20,135 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 564 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:40:20,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 249 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:40:20,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8247 states. [2022-11-25 22:40:21,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8247 to 8245. [2022-11-25 22:40:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8245 states, 8244 states have (on average 1.4517224648229015) internal successors, (11968), 8244 states have internal predecessors, (11968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:21,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8245 states to 8245 states and 11968 transitions. [2022-11-25 22:40:21,773 INFO L78 Accepts]: Start accepts. Automaton has 8245 states and 11968 transitions. Word has length 69 [2022-11-25 22:40:21,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:40:21,775 INFO L495 AbstractCegarLoop]: Abstraction has 8245 states and 11968 transitions. [2022-11-25 22:40:21,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:21,775 INFO L276 IsEmpty]: Start isEmpty. Operand 8245 states and 11968 transitions. [2022-11-25 22:40:21,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-25 22:40:21,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:40:21,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:40:21,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 22:40:21,781 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:40:21,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:40:21,782 INFO L85 PathProgramCache]: Analyzing trace with hash -399863285, now seen corresponding path program 1 times [2022-11-25 22:40:21,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:40:21,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547694284] [2022-11-25 22:40:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:21,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:40:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:40:23,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:40:23,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547694284] [2022-11-25 22:40:23,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547694284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:40:23,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:40:23,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-25 22:40:23,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754561819] [2022-11-25 22:40:23,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:40:23,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 22:40:23,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:40:23,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 22:40:23,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-11-25 22:40:23,950 INFO L87 Difference]: Start difference. First operand 8245 states and 11968 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:28,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:40:28,754 INFO L93 Difference]: Finished difference Result 21194 states and 30743 transitions. [2022-11-25 22:40:28,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 22:40:28,754 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-25 22:40:28,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:40:28,842 INFO L225 Difference]: With dead ends: 21194 [2022-11-25 22:40:28,843 INFO L226 Difference]: Without dead ends: 21192 [2022-11-25 22:40:28,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=250, Invalid=680, Unknown=0, NotChecked=0, Total=930 [2022-11-25 22:40:28,851 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 953 mSDsluCounter, 1495 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 953 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:40:28,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [953 Valid, 1748 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 22:40:28,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21192 states. [2022-11-25 22:40:32,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21192 to 16316. [2022-11-25 22:40:32,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16316 states, 16315 states have (on average 1.446399019307386) internal successors, (23598), 16315 states have internal predecessors, (23598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16316 states to 16316 states and 23598 transitions. [2022-11-25 22:40:32,329 INFO L78 Accepts]: Start accepts. Automaton has 16316 states and 23598 transitions. Word has length 70 [2022-11-25 22:40:32,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:40:32,330 INFO L495 AbstractCegarLoop]: Abstraction has 16316 states and 23598 transitions. [2022-11-25 22:40:32,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:32,330 INFO L276 IsEmpty]: Start isEmpty. Operand 16316 states and 23598 transitions. [2022-11-25 22:40:32,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-25 22:40:32,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:40:32,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:40:32,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 22:40:32,335 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:40:32,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:40:32,336 INFO L85 PathProgramCache]: Analyzing trace with hash -720478741, now seen corresponding path program 1 times [2022-11-25 22:40:32,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:40:32,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796329475] [2022-11-25 22:40:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:32,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:40:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:40:34,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:40:34,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796329475] [2022-11-25 22:40:34,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796329475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:40:34,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:40:34,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-25 22:40:34,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953227072] [2022-11-25 22:40:34,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:40:34,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 22:40:34,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:40:34,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 22:40:34,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-25 22:40:34,166 INFO L87 Difference]: Start difference. First operand 16316 states and 23598 transitions. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:39,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:40:39,093 INFO L93 Difference]: Finished difference Result 26707 states and 38608 transitions. [2022-11-25 22:40:39,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 22:40:39,094 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-25 22:40:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:40:39,178 INFO L225 Difference]: With dead ends: 26707 [2022-11-25 22:40:39,180 INFO L226 Difference]: Without dead ends: 26705 [2022-11-25 22:40:39,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=316, Invalid=874, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 22:40:39,192 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1137 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 2045 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:40:39,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1137 Valid, 2045 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 22:40:39,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26705 states. [2022-11-25 22:40:41,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26705 to 16348. [2022-11-25 22:40:41,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16348 states, 16347 states have (on average 1.446014559246345) internal successors, (23638), 16347 states have internal predecessors, (23638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:41,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16348 states to 16348 states and 23638 transitions. [2022-11-25 22:40:41,908 INFO L78 Accepts]: Start accepts. Automaton has 16348 states and 23638 transitions. Word has length 70 [2022-11-25 22:40:41,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:40:41,909 INFO L495 AbstractCegarLoop]: Abstraction has 16348 states and 23638 transitions. [2022-11-25 22:40:41,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:41,910 INFO L276 IsEmpty]: Start isEmpty. Operand 16348 states and 23638 transitions. [2022-11-25 22:40:41,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-25 22:40:41,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:40:41,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:40:41,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 22:40:41,912 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:40:41,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:40:41,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1093759435, now seen corresponding path program 1 times [2022-11-25 22:40:41,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:40:41,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937143105] [2022-11-25 22:40:41,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:41,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:40:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:40:43,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:40:43,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937143105] [2022-11-25 22:40:43,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937143105] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:40:43,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:40:43,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-25 22:40:43,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833222146] [2022-11-25 22:40:43,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:40:43,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 22:40:43,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:40:43,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 22:40:43,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-11-25 22:40:43,557 INFO L87 Difference]: Start difference. First operand 16348 states and 23638 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:47,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:40:47,999 INFO L93 Difference]: Finished difference Result 23993 states and 34652 transitions. [2022-11-25 22:40:48,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 22:40:48,000 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-25 22:40:48,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:40:48,061 INFO L225 Difference]: With dead ends: 23993 [2022-11-25 22:40:48,061 INFO L226 Difference]: Without dead ends: 23991 [2022-11-25 22:40:48,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2022-11-25 22:40:48,070 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1137 mSDsluCounter, 2099 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 2454 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:40:48,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1137 Valid, 2454 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 22:40:48,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23991 states. [2022-11-25 22:40:50,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23991 to 16374. [2022-11-25 22:40:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16374 states, 16373 states have (on average 1.4457338300861173) internal successors, (23671), 16373 states have internal predecessors, (23671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:50,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16374 states to 16374 states and 23671 transitions. [2022-11-25 22:40:50,917 INFO L78 Accepts]: Start accepts. Automaton has 16374 states and 23671 transitions. Word has length 70 [2022-11-25 22:40:50,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:40:50,917 INFO L495 AbstractCegarLoop]: Abstraction has 16374 states and 23671 transitions. [2022-11-25 22:40:50,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:50,918 INFO L276 IsEmpty]: Start isEmpty. Operand 16374 states and 23671 transitions. [2022-11-25 22:40:50,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-25 22:40:50,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:40:50,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:40:50,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 22:40:50,920 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:40:50,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:40:50,921 INFO L85 PathProgramCache]: Analyzing trace with hash 207867307, now seen corresponding path program 1 times [2022-11-25 22:40:50,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:40:50,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764865088] [2022-11-25 22:40:50,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:50,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:40:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:40:52,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:40:52,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764865088] [2022-11-25 22:40:52,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764865088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:40:52,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:40:52,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-25 22:40:52,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351656889] [2022-11-25 22:40:52,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:40:52,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 22:40:52,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:40:52,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 22:40:52,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-25 22:40:52,392 INFO L87 Difference]: Start difference. First operand 16374 states and 23671 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:56,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:40:56,357 INFO L93 Difference]: Finished difference Result 21769 states and 31397 transitions. [2022-11-25 22:40:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 22:40:56,357 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-25 22:40:56,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:40:56,398 INFO L225 Difference]: With dead ends: 21769 [2022-11-25 22:40:56,398 INFO L226 Difference]: Without dead ends: 19719 [2022-11-25 22:40:56,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2022-11-25 22:40:56,405 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 841 mSDsluCounter, 1808 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 2154 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:40:56,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 2154 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 22:40:56,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19719 states. [2022-11-25 22:40:58,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19719 to 18250. [2022-11-25 22:40:58,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18250 states, 18249 states have (on average 1.4435311523919119) internal successors, (26343), 18249 states have internal predecessors, (26343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:58,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18250 states to 18250 states and 26343 transitions. [2022-11-25 22:40:58,989 INFO L78 Accepts]: Start accepts. Automaton has 18250 states and 26343 transitions. Word has length 70 [2022-11-25 22:40:58,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:40:58,989 INFO L495 AbstractCegarLoop]: Abstraction has 18250 states and 26343 transitions. [2022-11-25 22:40:58,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:40:58,990 INFO L276 IsEmpty]: Start isEmpty. Operand 18250 states and 26343 transitions. [2022-11-25 22:40:58,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-25 22:40:58,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:40:58,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:40:58,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 22:40:58,992 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:40:58,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:40:58,992 INFO L85 PathProgramCache]: Analyzing trace with hash -730500725, now seen corresponding path program 1 times [2022-11-25 22:40:58,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:40:58,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41126557] [2022-11-25 22:40:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:58,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:40:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:41:01,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:01,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41126557] [2022-11-25 22:41:01,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41126557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:41:01,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:41:01,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-11-25 22:41:01,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809275633] [2022-11-25 22:41:01,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:41:01,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 22:41:01,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:01,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 22:41:01,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-11-25 22:41:01,277 INFO L87 Difference]: Start difference. First operand 18250 states and 26343 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:41:07,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:41:07,615 INFO L93 Difference]: Finished difference Result 21488 states and 30946 transitions. [2022-11-25 22:41:07,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 22:41:07,615 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-25 22:41:07,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:41:07,673 INFO L225 Difference]: With dead ends: 21488 [2022-11-25 22:41:07,673 INFO L226 Difference]: Without dead ends: 21486 [2022-11-25 22:41:07,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 22:41:07,683 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 1245 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 2943 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 2440 SdHoareTripleChecker+Invalid, 2955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:41:07,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1245 Valid, 2440 Invalid, 2955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2943 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-25 22:41:07,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21486 states. [2022-11-25 22:41:10,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21486 to 18268. [2022-11-25 22:41:10,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18268 states, 18267 states have (on average 1.4432035911753436) internal successors, (26363), 18267 states have internal predecessors, (26363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:41:10,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18268 states to 18268 states and 26363 transitions. [2022-11-25 22:41:10,245 INFO L78 Accepts]: Start accepts. Automaton has 18268 states and 26363 transitions. Word has length 70 [2022-11-25 22:41:10,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:41:10,245 INFO L495 AbstractCegarLoop]: Abstraction has 18268 states and 26363 transitions. [2022-11-25 22:41:10,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:41:10,245 INFO L276 IsEmpty]: Start isEmpty. Operand 18268 states and 26363 transitions. [2022-11-25 22:41:10,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 22:41:10,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:10,247 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:41:10,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 22:41:10,248 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:10,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:10,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1639788321, now seen corresponding path program 1 times [2022-11-25 22:41:10,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:10,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782049550] [2022-11-25 22:41:10,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:10,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:41:11,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:11,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782049550] [2022-11-25 22:41:11,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782049550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:41:11,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:41:11,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-25 22:41:11,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978765956] [2022-11-25 22:41:11,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:41:11,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 22:41:11,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:11,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 22:41:11,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:41:11,998 INFO L87 Difference]: Start difference. First operand 18268 states and 26363 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:41:18,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:41:18,778 INFO L93 Difference]: Finished difference Result 35129 states and 50679 transitions. [2022-11-25 22:41:18,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 22:41:18,779 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-25 22:41:18,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:41:18,845 INFO L225 Difference]: With dead ends: 35129 [2022-11-25 22:41:18,845 INFO L226 Difference]: Without dead ends: 35127 [2022-11-25 22:41:18,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=357, Invalid=975, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 22:41:18,854 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 850 mSDsluCounter, 1985 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 2357 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:41:18,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 2357 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 22:41:18,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35127 states. [2022-11-25 22:41:21,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35127 to 18254. [2022-11-25 22:41:21,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18254 states, 18253 states have (on average 1.4433243850325974) internal successors, (26345), 18253 states have internal predecessors, (26345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:41:21,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18254 states to 18254 states and 26345 transitions. [2022-11-25 22:41:21,630 INFO L78 Accepts]: Start accepts. Automaton has 18254 states and 26345 transitions. Word has length 72 [2022-11-25 22:41:21,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:41:21,630 INFO L495 AbstractCegarLoop]: Abstraction has 18254 states and 26345 transitions. [2022-11-25 22:41:21,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:41:21,630 INFO L276 IsEmpty]: Start isEmpty. Operand 18254 states and 26345 transitions. [2022-11-25 22:41:21,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 22:41:21,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:21,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:41:21,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 22:41:21,632 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:21,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:21,633 INFO L85 PathProgramCache]: Analyzing trace with hash 174449855, now seen corresponding path program 1 times [2022-11-25 22:41:21,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:21,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093914424] [2022-11-25 22:41:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:21,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:41:23,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:23,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093914424] [2022-11-25 22:41:23,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093914424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:41:23,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:41:23,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-25 22:41:23,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939647994] [2022-11-25 22:41:23,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:41:23,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 22:41:23,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:23,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 22:41:23,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-25 22:41:23,056 INFO L87 Difference]: Start difference. First operand 18254 states and 26345 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:41:30,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:41:30,028 INFO L93 Difference]: Finished difference Result 37693 states and 54457 transitions. [2022-11-25 22:41:30,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 22:41:30,029 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-25 22:41:30,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:41:30,086 INFO L225 Difference]: With dead ends: 37693 [2022-11-25 22:41:30,086 INFO L226 Difference]: Without dead ends: 37691 [2022-11-25 22:41:30,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2022-11-25 22:41:30,094 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 997 mSDsluCounter, 1711 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 1964 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:41:30,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [997 Valid, 1964 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 22:41:30,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37691 states. [2022-11-25 22:41:32,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37691 to 18260. [2022-11-25 22:41:33,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18260 states, 18259 states have (on average 1.4432334739032806) internal successors, (26352), 18259 states have internal predecessors, (26352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:41:33,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18260 states to 18260 states and 26352 transitions. [2022-11-25 22:41:33,027 INFO L78 Accepts]: Start accepts. Automaton has 18260 states and 26352 transitions. Word has length 72 [2022-11-25 22:41:33,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:41:33,027 INFO L495 AbstractCegarLoop]: Abstraction has 18260 states and 26352 transitions. [2022-11-25 22:41:33,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:41:33,028 INFO L276 IsEmpty]: Start isEmpty. Operand 18260 states and 26352 transitions. [2022-11-25 22:41:33,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 22:41:33,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:33,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:41:33,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 22:41:33,030 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:33,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:33,031 INFO L85 PathProgramCache]: Analyzing trace with hash -711442273, now seen corresponding path program 1 times [2022-11-25 22:41:33,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:33,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410165860] [2022-11-25 22:41:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:33,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:41:34,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:34,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410165860] [2022-11-25 22:41:34,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410165860] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:41:34,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:41:34,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-25 22:41:34,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812868076] [2022-11-25 22:41:34,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:41:34,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 22:41:34,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:34,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 22:41:34,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-11-25 22:41:34,395 INFO L87 Difference]: Start difference. First operand 18260 states and 26352 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:41:41,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:41:41,341 INFO L93 Difference]: Finished difference Result 40294 states and 58183 transitions. [2022-11-25 22:41:41,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 22:41:41,342 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-25 22:41:41,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:41:41,401 INFO L225 Difference]: With dead ends: 40294 [2022-11-25 22:41:41,401 INFO L226 Difference]: Without dead ends: 36196 [2022-11-25 22:41:41,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=696, Unknown=0, NotChecked=0, Total=930 [2022-11-25 22:41:41,411 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 893 mSDsluCounter, 1725 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:41:41,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [893 Valid, 1972 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 22:41:41,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36196 states. [2022-11-25 22:41:45,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36196 to 23372. [2022-11-25 22:41:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23372 states, 23371 states have (on average 1.4399897308630354) internal successors, (33654), 23371 states have internal predecessors, (33654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:41:45,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23372 states to 23372 states and 33654 transitions. [2022-11-25 22:41:45,724 INFO L78 Accepts]: Start accepts. Automaton has 23372 states and 33654 transitions. Word has length 72 [2022-11-25 22:41:45,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:41:45,724 INFO L495 AbstractCegarLoop]: Abstraction has 23372 states and 33654 transitions. [2022-11-25 22:41:45,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:41:45,724 INFO L276 IsEmpty]: Start isEmpty. Operand 23372 states and 33654 transitions. [2022-11-25 22:41:45,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 22:41:45,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:45,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:41:45,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 22:41:45,726 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:45,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:45,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1649810305, now seen corresponding path program 1 times [2022-11-25 22:41:45,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:45,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525663726] [2022-11-25 22:41:45,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:45,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:41:47,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:47,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525663726] [2022-11-25 22:41:47,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525663726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:41:47,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:41:47,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-25 22:41:47,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677477684] [2022-11-25 22:41:47,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:41:47,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 22:41:47,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:47,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 22:41:47,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-25 22:41:47,196 INFO L87 Difference]: Start difference. First operand 23372 states and 33654 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:41:56,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:41:56,863 INFO L93 Difference]: Finished difference Result 44674 states and 64272 transitions. [2022-11-25 22:41:56,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 22:41:56,864 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-25 22:41:56,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:41:56,932 INFO L225 Difference]: With dead ends: 44674 [2022-11-25 22:41:56,932 INFO L226 Difference]: Without dead ends: 44672 [2022-11-25 22:41:56,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=300, Invalid=822, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 22:41:56,942 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1321 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1321 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:41:56,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1321 Valid, 1355 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 22:41:56,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44672 states. [2022-11-25 22:42:01,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44672 to 23368. [2022-11-25 22:42:01,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23368 states, 23367 states have (on average 1.4399366628150811) internal successors, (33647), 23367 states have internal predecessors, (33647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:42:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23368 states to 23368 states and 33647 transitions. [2022-11-25 22:42:01,467 INFO L78 Accepts]: Start accepts. Automaton has 23368 states and 33647 transitions. Word has length 72 [2022-11-25 22:42:01,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:42:01,467 INFO L495 AbstractCegarLoop]: Abstraction has 23368 states and 33647 transitions. [2022-11-25 22:42:01,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:42:01,467 INFO L276 IsEmpty]: Start isEmpty. Operand 23368 states and 33647 transitions. [2022-11-25 22:42:01,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 22:42:01,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:42:01,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:42:01,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 22:42:01,469 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:42:01,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:42:01,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1300641951, now seen corresponding path program 1 times [2022-11-25 22:42:01,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:42:01,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903038975] [2022-11-25 22:42:01,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:42:01,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:42:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:42:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:42:02,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:42:02,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903038975] [2022-11-25 22:42:02,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903038975] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:42:02,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:42:02,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-25 22:42:02,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107689550] [2022-11-25 22:42:02,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:42:02,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 22:42:02,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:42:02,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 22:42:02,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-11-25 22:42:02,979 INFO L87 Difference]: Start difference. First operand 23368 states and 33647 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:42:11,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:42:11,014 INFO L93 Difference]: Finished difference Result 35907 states and 51657 transitions. [2022-11-25 22:42:11,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 22:42:11,014 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-25 22:42:11,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:42:11,062 INFO L225 Difference]: With dead ends: 35907 [2022-11-25 22:42:11,062 INFO L226 Difference]: Without dead ends: 35905 [2022-11-25 22:42:11,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=317, Invalid=873, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 22:42:11,070 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 1152 mSDsluCounter, 2035 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 2405 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:42:11,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1152 Valid, 2405 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 22:42:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35905 states. [2022-11-25 22:42:15,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35905 to 23384. [2022-11-25 22:42:15,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23384 states, 23383 states have (on average 1.43980669717316) internal successors, (33667), 23383 states have internal predecessors, (33667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:42:15,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23384 states to 23384 states and 33667 transitions. [2022-11-25 22:42:15,826 INFO L78 Accepts]: Start accepts. Automaton has 23384 states and 33667 transitions. Word has length 72 [2022-11-25 22:42:15,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:42:15,827 INFO L495 AbstractCegarLoop]: Abstraction has 23384 states and 33667 transitions. [2022-11-25 22:42:15,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:42:15,827 INFO L276 IsEmpty]: Start isEmpty. Operand 23384 states and 33667 transitions. [2022-11-25 22:42:15,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 22:42:15,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:42:15,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:42:15,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 22:42:15,830 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:42:15,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:42:15,830 INFO L85 PathProgramCache]: Analyzing trace with hash 414749823, now seen corresponding path program 1 times [2022-11-25 22:42:15,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:42:15,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11882317] [2022-11-25 22:42:15,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:42:15,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:42:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:42:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:42:17,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:42:17,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11882317] [2022-11-25 22:42:17,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11882317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:42:17,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:42:17,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-25 22:42:17,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200737988] [2022-11-25 22:42:17,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:42:17,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 22:42:17,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:42:17,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 22:42:17,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-11-25 22:42:17,169 INFO L87 Difference]: Start difference. First operand 23384 states and 33667 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:42:25,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:42:25,467 INFO L93 Difference]: Finished difference Result 43169 states and 62127 transitions. [2022-11-25 22:42:25,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 22:42:25,468 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-25 22:42:25,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:42:25,528 INFO L225 Difference]: With dead ends: 43169 [2022-11-25 22:42:25,528 INFO L226 Difference]: Without dead ends: 39071 [2022-11-25 22:42:25,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=696, Unknown=0, NotChecked=0, Total=930 [2022-11-25 22:42:25,542 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 1072 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:42:25,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1072 Valid, 1767 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 22:42:25,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39071 states. [2022-11-25 22:42:30,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39071 to 23409. [2022-11-25 22:42:30,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23409 states, 23408 states have (on average 1.4396360218728639) internal successors, (33699), 23408 states have internal predecessors, (33699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:42:30,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23409 states to 23409 states and 33699 transitions. [2022-11-25 22:42:30,277 INFO L78 Accepts]: Start accepts. Automaton has 23409 states and 33699 transitions. Word has length 72 [2022-11-25 22:42:30,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:42:30,277 INFO L495 AbstractCegarLoop]: Abstraction has 23409 states and 33699 transitions. [2022-11-25 22:42:30,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:42:30,277 INFO L276 IsEmpty]: Start isEmpty. Operand 23409 states and 33699 transitions. [2022-11-25 22:42:30,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 22:42:30,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:42:30,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:42:30,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 22:42:30,278 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:42:30,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:42:30,279 INFO L85 PathProgramCache]: Analyzing trace with hash -523618209, now seen corresponding path program 1 times [2022-11-25 22:42:30,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:42:30,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987857699] [2022-11-25 22:42:30,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:42:30,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:42:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:42:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:42:31,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:42:31,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987857699] [2022-11-25 22:42:31,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987857699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:42:31,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:42:31,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-25 22:42:31,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747659821] [2022-11-25 22:42:31,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:42:31,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 22:42:31,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:42:31,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 22:42:31,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:42:31,628 INFO L87 Difference]: Start difference. First operand 23409 states and 33699 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:42:42,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:42:42,114 INFO L93 Difference]: Finished difference Result 45024 states and 64735 transitions. [2022-11-25 22:42:42,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 22:42:42,114 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-25 22:42:42,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:42:42,168 INFO L225 Difference]: With dead ends: 45024 [2022-11-25 22:42:42,168 INFO L226 Difference]: Without dead ends: 45022 [2022-11-25 22:42:42,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 22:42:42,177 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1116 mSDsluCounter, 3156 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 3511 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:42:42,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 3511 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 22:42:42,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45022 states. [2022-11-25 22:42:47,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45022 to 23430. [2022-11-25 22:42:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23430 states, 23429 states have (on average 1.4394980579623544) internal successors, (33726), 23429 states have internal predecessors, (33726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:42:47,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23430 states to 23430 states and 33726 transitions. [2022-11-25 22:42:47,225 INFO L78 Accepts]: Start accepts. Automaton has 23430 states and 33726 transitions. Word has length 72 [2022-11-25 22:42:47,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:42:47,225 INFO L495 AbstractCegarLoop]: Abstraction has 23430 states and 33726 transitions. [2022-11-25 22:42:47,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:42:47,226 INFO L276 IsEmpty]: Start isEmpty. Operand 23430 states and 33726 transitions. [2022-11-25 22:42:47,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 22:42:47,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:42:47,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:42:47,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 22:42:47,227 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:42:47,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:42:47,228 INFO L85 PathProgramCache]: Analyzing trace with hash 140914783, now seen corresponding path program 1 times [2022-11-25 22:42:47,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:42:47,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672876520] [2022-11-25 22:42:47,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:42:47,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:42:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:42:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:42:48,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:42:48,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672876520] [2022-11-25 22:42:48,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672876520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:42:48,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:42:48,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-25 22:42:48,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435752386] [2022-11-25 22:42:48,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:42:48,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 22:42:48,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:42:48,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 22:42:48,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-11-25 22:42:48,662 INFO L87 Difference]: Start difference. First operand 23430 states and 33726 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:42:55,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:42:55,972 INFO L93 Difference]: Finished difference Result 30749 states and 44181 transitions. [2022-11-25 22:42:55,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 22:42:55,973 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-25 22:42:55,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:42:56,012 INFO L225 Difference]: With dead ends: 30749 [2022-11-25 22:42:56,013 INFO L226 Difference]: Without dead ends: 28699 [2022-11-25 22:42:56,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2022-11-25 22:42:56,021 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 768 mSDsluCounter, 2180 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 2537 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:42:56,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 2537 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 22:42:56,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28699 states. [2022-11-25 22:43:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28699 to 23443. [2022-11-25 22:43:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23443 states, 23442 states have (on average 1.439382305264056) internal successors, (33742), 23442 states have internal predecessors, (33742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:43:00,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23443 states to 23443 states and 33742 transitions. [2022-11-25 22:43:00,899 INFO L78 Accepts]: Start accepts. Automaton has 23443 states and 33742 transitions. Word has length 72 [2022-11-25 22:43:00,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:43:00,899 INFO L495 AbstractCegarLoop]: Abstraction has 23443 states and 33742 transitions. [2022-11-25 22:43:00,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:43:00,899 INFO L276 IsEmpty]: Start isEmpty. Operand 23443 states and 33742 transitions. [2022-11-25 22:43:00,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 22:43:00,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:43:00,900 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:43:00,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 22:43:00,901 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:43:00,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:43:00,901 INFO L85 PathProgramCache]: Analyzing trace with hash -797453249, now seen corresponding path program 1 times [2022-11-25 22:43:00,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:43:00,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405534938] [2022-11-25 22:43:00,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:43:00,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:43:00,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:43:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:43:02,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:43:02,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405534938] [2022-11-25 22:43:02,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405534938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:43:02,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:43:02,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-25 22:43:02,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086736730] [2022-11-25 22:43:02,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:43:02,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 22:43:02,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:43:02,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 22:43:02,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-25 22:43:02,186 INFO L87 Difference]: Start difference. First operand 23443 states and 33742 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:43:10,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:43:10,566 INFO L93 Difference]: Finished difference Result 35905 states and 51656 transitions. [2022-11-25 22:43:10,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 22:43:10,567 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-25 22:43:10,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:43:10,620 INFO L225 Difference]: With dead ends: 35905 [2022-11-25 22:43:10,620 INFO L226 Difference]: Without dead ends: 35903 [2022-11-25 22:43:10,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2022-11-25 22:43:10,630 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 1147 mSDsluCounter, 1642 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1147 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:43:10,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1147 Valid, 1991 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:43:10,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35903 states. [2022-11-25 22:43:15,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35903 to 23451. [2022-11-25 22:43:15,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23451 states, 23450 states have (on average 1.439360341151386) internal successors, (33753), 23450 states have internal predecessors, (33753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:43:15,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23451 states to 23451 states and 33753 transitions. [2022-11-25 22:43:15,766 INFO L78 Accepts]: Start accepts. Automaton has 23451 states and 33753 transitions. Word has length 72 [2022-11-25 22:43:15,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:43:15,766 INFO L495 AbstractCegarLoop]: Abstraction has 23451 states and 33753 transitions. [2022-11-25 22:43:15,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:43:15,767 INFO L276 IsEmpty]: Start isEmpty. Operand 23451 states and 33753 transitions. [2022-11-25 22:43:15,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 22:43:15,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:43:15,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:43:15,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-25 22:43:15,768 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:43:15,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:43:15,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1736263649, now seen corresponding path program 1 times [2022-11-25 22:43:15,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:43:15,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627046344] [2022-11-25 22:43:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:43:15,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:43:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:43:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:43:17,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:43:17,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627046344] [2022-11-25 22:43:17,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627046344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:43:17,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:43:17,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-25 22:43:17,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319969784] [2022-11-25 22:43:17,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:43:17,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 22:43:17,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:43:17,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 22:43:17,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-11-25 22:43:17,142 INFO L87 Difference]: Start difference. First operand 23451 states and 33753 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:43:25,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:43:25,853 INFO L93 Difference]: Finished difference Result 28751 states and 41271 transitions. [2022-11-25 22:43:25,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 22:43:25,854 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-25 22:43:25,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:43:25,891 INFO L225 Difference]: With dead ends: 28751 [2022-11-25 22:43:25,891 INFO L226 Difference]: Without dead ends: 28749 [2022-11-25 22:43:25,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2022-11-25 22:43:25,898 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 890 mSDsluCounter, 2798 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 3218 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:43:25,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [890 Valid, 3218 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 22:43:25,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28749 states. [2022-11-25 22:43:31,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28749 to 24487. [2022-11-25 22:43:31,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24487 states, 24486 states have (on average 1.437882871845136) internal successors, (35208), 24486 states have internal predecessors, (35208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:43:31,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24487 states to 24487 states and 35208 transitions. [2022-11-25 22:43:31,943 INFO L78 Accepts]: Start accepts. Automaton has 24487 states and 35208 transitions. Word has length 72 [2022-11-25 22:43:31,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:43:31,944 INFO L495 AbstractCegarLoop]: Abstraction has 24487 states and 35208 transitions. [2022-11-25 22:43:31,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:43:31,944 INFO L276 IsEmpty]: Start isEmpty. Operand 24487 states and 35208 transitions. [2022-11-25 22:43:31,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 22:43:31,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:43:31,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:43:31,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-25 22:43:31,946 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:43:31,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:43:31,946 INFO L85 PathProgramCache]: Analyzing trace with hash 436842948, now seen corresponding path program 1 times [2022-11-25 22:43:31,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:43:31,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683362830] [2022-11-25 22:43:31,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:43:31,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:43:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:43:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:43:31,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:43:31,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683362830] [2022-11-25 22:43:31,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683362830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:43:31,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:43:31,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:43:31,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019092403] [2022-11-25 22:43:31,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:43:31,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:43:31,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:43:31,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:43:31,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:43:31,993 INFO L87 Difference]: Start difference. First operand 24487 states and 35208 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:43:37,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:43:37,566 INFO L93 Difference]: Finished difference Result 43335 states and 62446 transitions. [2022-11-25 22:43:37,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:43:37,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-25 22:43:37,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:43:37,601 INFO L225 Difference]: With dead ends: 43335 [2022-11-25 22:43:37,601 INFO L226 Difference]: Without dead ends: 23783 [2022-11-25 22:43:37,616 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 [2022-11-25 22:43:37,617 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 148 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:43:37,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 371 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:43:37,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23783 states. [2022-11-25 22:43:43,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23783 to 23781. [2022-11-25 22:43:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23781 states, 23780 states have (on average 1.4362489486963834) internal successors, (34154), 23780 states have internal predecessors, (34154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:43:43,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23781 states to 23781 states and 34154 transitions. [2022-11-25 22:43:43,259 INFO L78 Accepts]: Start accepts. Automaton has 23781 states and 34154 transitions. Word has length 73 [2022-11-25 22:43:43,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:43:43,260 INFO L495 AbstractCegarLoop]: Abstraction has 23781 states and 34154 transitions. [2022-11-25 22:43:43,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:43:43,260 INFO L276 IsEmpty]: Start isEmpty. Operand 23781 states and 34154 transitions. [2022-11-25 22:43:43,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 22:43:43,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:43:43,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:43:43,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-25 22:43:43,262 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:43:43,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:43:43,263 INFO L85 PathProgramCache]: Analyzing trace with hash 395705214, now seen corresponding path program 1 times [2022-11-25 22:43:43,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:43:43,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383111057] [2022-11-25 22:43:43,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:43:43,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:43:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:43:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:43:43,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:43:43,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383111057] [2022-11-25 22:43:43,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383111057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:43:43,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:43:43,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:43:43,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541669956] [2022-11-25 22:43:43,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:43:43,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:43:43,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:43:43,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:43:43,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:43:43,399 INFO L87 Difference]: Start difference. First operand 23781 states and 34154 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:43:48,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:43:48,700 INFO L93 Difference]: Finished difference Result 43153 states and 62114 transitions. [2022-11-25 22:43:48,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:43:48,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-25 22:43:48,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:43:48,730 INFO L225 Difference]: With dead ends: 43153 [2022-11-25 22:43:48,730 INFO L226 Difference]: Without dead ends: 23074 [2022-11-25 22:43:48,746 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 [2022-11-25 22:43:48,747 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 138 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:43:48,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 375 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:43:48,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23074 states. [2022-11-25 22:43:54,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23074 to 23072. [2022-11-25 22:43:54,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23072 states, 23071 states have (on average 1.4342681288197303) internal successors, (33090), 23071 states have internal predecessors, (33090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:43:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23072 states to 23072 states and 33090 transitions. [2022-11-25 22:43:54,267 INFO L78 Accepts]: Start accepts. Automaton has 23072 states and 33090 transitions. Word has length 73 [2022-11-25 22:43:54,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:43:54,267 INFO L495 AbstractCegarLoop]: Abstraction has 23072 states and 33090 transitions. [2022-11-25 22:43:54,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:43:54,267 INFO L276 IsEmpty]: Start isEmpty. Operand 23072 states and 33090 transitions. [2022-11-25 22:43:54,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 22:43:54,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:43:54,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:43:54,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-25 22:43:54,269 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:43:54,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:43:54,270 INFO L85 PathProgramCache]: Analyzing trace with hash 59046075, now seen corresponding path program 1 times [2022-11-25 22:43:54,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:43:54,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720580415] [2022-11-25 22:43:54,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:43:54,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:43:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:43:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:43:54,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:43:54,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720580415] [2022-11-25 22:43:54,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720580415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:43:54,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:43:54,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:43:54,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825813428] [2022-11-25 22:43:54,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:43:54,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:43:54,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:43:54,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:43:54,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:43:54,310 INFO L87 Difference]: Start difference. First operand 23072 states and 33090 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:44:00,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:44:00,464 INFO L93 Difference]: Finished difference Result 44327 states and 63786 transitions. [2022-11-25 22:44:00,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:44:00,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-25 22:44:00,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:44:00,494 INFO L225 Difference]: With dead ends: 44327 [2022-11-25 22:44:00,494 INFO L226 Difference]: Without dead ends: 22475 [2022-11-25 22:44:00,511 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 [2022-11-25 22:44:00,512 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 132 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 365 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 [2022-11-25 22:44:00,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 365 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:44:00,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22475 states. [2022-11-25 22:44:06,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22475 to 22359. [2022-11-25 22:44:06,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22359 states, 22358 states have (on average 1.4326415600679847) internal successors, (32031), 22358 states have internal predecessors, (32031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:44:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22359 states to 22359 states and 32031 transitions. [2022-11-25 22:44:06,085 INFO L78 Accepts]: Start accepts. Automaton has 22359 states and 32031 transitions. Word has length 73 [2022-11-25 22:44:06,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:44:06,085 INFO L495 AbstractCegarLoop]: Abstraction has 22359 states and 32031 transitions. [2022-11-25 22:44:06,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:44:06,086 INFO L276 IsEmpty]: Start isEmpty. Operand 22359 states and 32031 transitions. [2022-11-25 22:44:06,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 22:44:06,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:44:06,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:44:06,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-25 22:44:06,087 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:44:06,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:44:06,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1687568749, now seen corresponding path program 1 times [2022-11-25 22:44:06,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:44:06,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485432390] [2022-11-25 22:44:06,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:44:06,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:44:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:44:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:44:09,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:44:09,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485432390] [2022-11-25 22:44:09,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485432390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:44:09,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:44:09,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-25 22:44:09,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337072326] [2022-11-25 22:44:09,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:44:09,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 22:44:09,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:44:09,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 22:44:09,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-11-25 22:44:09,209 INFO L87 Difference]: Start difference. First operand 22359 states and 32031 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:44:23,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:44:23,278 INFO L93 Difference]: Finished difference Result 33817 states and 48450 transitions. [2022-11-25 22:44:23,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 22:44:23,278 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-25 22:44:23,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:44:23,327 INFO L225 Difference]: With dead ends: 33817 [2022-11-25 22:44:23,327 INFO L226 Difference]: Without dead ends: 33815 [2022-11-25 22:44:23,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=565, Invalid=1885, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 22:44:23,336 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 1038 mSDsluCounter, 2016 mSDsCounter, 0 mSdLazyCounter, 3009 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 2237 SdHoareTripleChecker+Invalid, 3020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:44:23,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1038 Valid, 2237 Invalid, 3020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3009 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-25 22:44:23,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33815 states. [2022-11-25 22:44:29,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33815 to 22339. [2022-11-25 22:44:29,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22339 states, 22338 states have (on average 1.4329393857999821) internal successors, (32009), 22338 states have internal predecessors, (32009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:44:29,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22339 states to 22339 states and 32009 transitions. [2022-11-25 22:44:29,424 INFO L78 Accepts]: Start accepts. Automaton has 22339 states and 32009 transitions. Word has length 74 [2022-11-25 22:44:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:44:29,425 INFO L495 AbstractCegarLoop]: Abstraction has 22339 states and 32009 transitions. [2022-11-25 22:44:29,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:44:29,425 INFO L276 IsEmpty]: Start isEmpty. Operand 22339 states and 32009 transitions. [2022-11-25 22:44:29,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 22:44:29,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:44:29,426 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:44:29,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-25 22:44:29,426 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:44:29,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:44:29,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1721506419, now seen corresponding path program 1 times [2022-11-25 22:44:29,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:44:29,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225830141] [2022-11-25 22:44:29,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:44:29,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:44:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:44:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:44:31,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:44:31,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225830141] [2022-11-25 22:44:31,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225830141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:44:31,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:44:31,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-11-25 22:44:31,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77764756] [2022-11-25 22:44:31,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:44:31,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 22:44:31,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:44:31,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 22:44:31,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-11-25 22:44:31,114 INFO L87 Difference]: Start difference. First operand 22339 states and 32009 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:44:41,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:44:41,054 INFO L93 Difference]: Finished difference Result 29157 states and 41712 transitions. [2022-11-25 22:44:41,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 22:44:41,055 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-25 22:44:41,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:44:41,104 INFO L225 Difference]: With dead ends: 29157 [2022-11-25 22:44:41,104 INFO L226 Difference]: Without dead ends: 27235 [2022-11-25 22:44:41,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=380, Invalid=1342, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 22:44:41,113 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 830 mSDsluCounter, 1959 mSDsCounter, 0 mSdLazyCounter, 2576 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 2183 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:44:41,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 2183 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2576 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-25 22:44:41,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27235 states. [2022-11-25 22:44:47,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27235 to 22342. [2022-11-25 22:44:47,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22342 states, 22341 states have (on average 1.4329260104740165) internal successors, (32013), 22341 states have internal predecessors, (32013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:44:47,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22342 states to 22342 states and 32013 transitions. [2022-11-25 22:44:47,344 INFO L78 Accepts]: Start accepts. Automaton has 22342 states and 32013 transitions. Word has length 74 [2022-11-25 22:44:47,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:44:47,344 INFO L495 AbstractCegarLoop]: Abstraction has 22342 states and 32013 transitions. [2022-11-25 22:44:47,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:44:47,344 INFO L276 IsEmpty]: Start isEmpty. Operand 22342 states and 32013 transitions. [2022-11-25 22:44:47,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 22:44:47,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:44:47,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:44:47,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-25 22:44:47,346 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:44:47,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:44:47,346 INFO L85 PathProgramCache]: Analyzing trace with hash 783138387, now seen corresponding path program 1 times [2022-11-25 22:44:47,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:44:47,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267299954] [2022-11-25 22:44:47,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:44:47,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:44:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:44:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:44:50,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:44:50,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267299954] [2022-11-25 22:44:50,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267299954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:44:50,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:44:50,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-11-25 22:44:50,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757480998] [2022-11-25 22:44:50,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:44:50,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 22:44:50,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:44:50,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 22:44:50,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-11-25 22:44:50,220 INFO L87 Difference]: Start difference. First operand 22342 states and 32013 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:45:02,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:45:02,220 INFO L93 Difference]: Finished difference Result 25472 states and 36408 transitions. [2022-11-25 22:45:02,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 22:45:02,220 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-25 22:45:02,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:45:02,255 INFO L225 Difference]: With dead ends: 25472 [2022-11-25 22:45:02,255 INFO L226 Difference]: Without dead ends: 25470 [2022-11-25 22:45:02,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=625, Invalid=1925, Unknown=0, NotChecked=0, Total=2550 [2022-11-25 22:45:02,262 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 1254 mSDsluCounter, 2157 mSDsCounter, 0 mSdLazyCounter, 3003 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1254 SdHoareTripleChecker+Valid, 2383 SdHoareTripleChecker+Invalid, 3025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:45:02,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1254 Valid, 2383 Invalid, 3025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3003 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-25 22:45:02,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25470 states. [2022-11-25 22:45:07,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25470 to 22352. [2022-11-25 22:45:07,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22352 states, 22351 states have (on average 1.4328665384099146) internal successors, (32026), 22351 states have internal predecessors, (32026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:45:07,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22352 states to 22352 states and 32026 transitions. [2022-11-25 22:45:07,754 INFO L78 Accepts]: Start accepts. Automaton has 22352 states and 32026 transitions. Word has length 74 [2022-11-25 22:45:07,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:45:07,754 INFO L495 AbstractCegarLoop]: Abstraction has 22352 states and 32026 transitions. [2022-11-25 22:45:07,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:45:07,754 INFO L276 IsEmpty]: Start isEmpty. Operand 22352 states and 32026 transitions. [2022-11-25 22:45:07,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 22:45:07,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:45:07,755 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:45:07,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-25 22:45:07,756 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:45:07,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:45:07,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1447671379, now seen corresponding path program 1 times [2022-11-25 22:45:07,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:45:07,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436097048] [2022-11-25 22:45:07,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:45:07,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:45:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:45:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:45:09,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:45:09,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436097048] [2022-11-25 22:45:09,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436097048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:45:09,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:45:09,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-25 22:45:09,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900778605] [2022-11-25 22:45:09,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:45:09,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 22:45:09,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:45:09,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 22:45:09,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:45:09,143 INFO L87 Difference]: Start difference. First operand 22352 states and 32026 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:45:17,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:45:17,649 INFO L93 Difference]: Finished difference Result 29152 states and 41709 transitions. [2022-11-25 22:45:17,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 22:45:17,650 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-25 22:45:17,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:45:17,685 INFO L225 Difference]: With dead ends: 29152 [2022-11-25 22:45:17,685 INFO L226 Difference]: Without dead ends: 27230 [2022-11-25 22:45:17,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 22:45:17,693 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 770 mSDsluCounter, 2705 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 3041 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:45:17,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [770 Valid, 3041 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 22:45:17,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27230 states. [2022-11-25 22:45:23,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27230 to 22358. [2022-11-25 22:45:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22358 states, 22357 states have (on average 1.4327950977322539) internal successors, (32033), 22357 states have internal predecessors, (32033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:45:23,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22358 states to 22358 states and 32033 transitions. [2022-11-25 22:45:23,161 INFO L78 Accepts]: Start accepts. Automaton has 22358 states and 32033 transitions. Word has length 74 [2022-11-25 22:45:23,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:45:23,162 INFO L495 AbstractCegarLoop]: Abstraction has 22358 states and 32033 transitions. [2022-11-25 22:45:23,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:45:23,162 INFO L276 IsEmpty]: Start isEmpty. Operand 22358 states and 32033 transitions. [2022-11-25 22:45:23,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 22:45:23,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:45:23,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:45:23,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-25 22:45:23,164 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:45:23,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:45:23,164 INFO L85 PathProgramCache]: Analyzing trace with hash 509303347, now seen corresponding path program 1 times [2022-11-25 22:45:23,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:45:23,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488368751] [2022-11-25 22:45:23,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:45:23,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:45:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:45:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:45:24,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:45:24,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488368751] [2022-11-25 22:45:24,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488368751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:45:24,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:45:24,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-25 22:45:24,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165250284] [2022-11-25 22:45:24,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:45:24,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 22:45:24,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:45:24,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 22:45:24,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:45:24,557 INFO L87 Difference]: Start difference. First operand 22358 states and 32033 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:45:38,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:45:38,490 INFO L93 Difference]: Finished difference Result 40261 states and 57530 transitions. [2022-11-25 22:45:38,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 22:45:38,491 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-25 22:45:38,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:45:38,559 INFO L225 Difference]: With dead ends: 40261 [2022-11-25 22:45:38,559 INFO L226 Difference]: Without dead ends: 40259 [2022-11-25 22:45:38,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 22:45:38,569 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 936 mSDsluCounter, 1326 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:45:38,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 1596 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 22:45:38,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40259 states. [2022-11-25 22:45:44,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40259 to 22358. [2022-11-25 22:45:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22358 states, 22357 states have (on average 1.4327950977322539) internal successors, (32033), 22357 states have internal predecessors, (32033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:45:44,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22358 states to 22358 states and 32033 transitions. [2022-11-25 22:45:44,968 INFO L78 Accepts]: Start accepts. Automaton has 22358 states and 32033 transitions. Word has length 74 [2022-11-25 22:45:44,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:45:44,969 INFO L495 AbstractCegarLoop]: Abstraction has 22358 states and 32033 transitions. [2022-11-25 22:45:44,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:45:44,969 INFO L276 IsEmpty]: Start isEmpty. Operand 22358 states and 32033 transitions. [2022-11-25 22:45:44,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 22:45:44,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:45:44,970 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:45:44,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-25 22:45:44,970 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:45:44,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:45:44,970 INFO L85 PathProgramCache]: Analyzing trace with hash -429507053, now seen corresponding path program 1 times [2022-11-25 22:45:44,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:45:44,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582067320] [2022-11-25 22:45:44,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:45:44,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:45:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:45:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:45:47,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:45:47,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582067320] [2022-11-25 22:45:47,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582067320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:45:47,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:45:47,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-25 22:45:47,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724518348] [2022-11-25 22:45:47,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:45:47,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 22:45:47,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:45:47,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 22:45:47,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-11-25 22:45:47,789 INFO L87 Difference]: Start difference. First operand 22358 states and 32033 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:45:58,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:45:58,760 INFO L93 Difference]: Finished difference Result 25430 states and 36364 transitions. [2022-11-25 22:45:58,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-25 22:45:58,761 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-25 22:45:58,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:45:58,793 INFO L225 Difference]: With dead ends: 25430 [2022-11-25 22:45:58,793 INFO L226 Difference]: Without dead ends: 25428 [2022-11-25 22:45:58,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=567, Invalid=1883, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 22:45:58,800 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1256 mSDsluCounter, 3052 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1256 SdHoareTripleChecker+Valid, 3377 SdHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:45:58,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1256 Valid, 3377 Invalid, 1611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-25 22:45:58,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25428 states. [2022-11-25 22:46:05,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25428 to 22364. [2022-11-25 22:46:05,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22364 states, 22363 states have (on average 1.4327236953897062) internal successors, (32040), 22363 states have internal predecessors, (32040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:46:05,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22364 states to 22364 states and 32040 transitions. [2022-11-25 22:46:05,368 INFO L78 Accepts]: Start accepts. Automaton has 22364 states and 32040 transitions. Word has length 74 [2022-11-25 22:46:05,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:46:05,368 INFO L495 AbstractCegarLoop]: Abstraction has 22364 states and 32040 transitions. [2022-11-25 22:46:05,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:46:05,369 INFO L276 IsEmpty]: Start isEmpty. Operand 22364 states and 32040 transitions. [2022-11-25 22:46:05,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 22:46:05,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:46:05,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:46:05,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-25 22:46:05,370 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:46:05,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:46:05,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1386517043, now seen corresponding path program 1 times [2022-11-25 22:46:05,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:46:05,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919718717] [2022-11-25 22:46:05,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:46:05,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:46:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:46:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:46:08,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:46:08,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919718717] [2022-11-25 22:46:08,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919718717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:46:08,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:46:08,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-11-25 22:46:08,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398841945] [2022-11-25 22:46:08,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:46:08,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 22:46:08,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:46:08,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 22:46:08,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-11-25 22:46:08,797 INFO L87 Difference]: Start difference. First operand 22364 states and 32040 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:46:21,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:46:21,464 INFO L93 Difference]: Finished difference Result 40716 states and 58412 transitions. [2022-11-25 22:46:21,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 22:46:21,465 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-25 22:46:21,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:46:21,494 INFO L225 Difference]: With dead ends: 40716 [2022-11-25 22:46:21,494 INFO L226 Difference]: Without dead ends: 24070 [2022-11-25 22:46:21,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2022-11-25 22:46:21,507 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 699 mSDsluCounter, 3358 mSDsCounter, 0 mSdLazyCounter, 1865 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 3707 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:46:21,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 3707 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1865 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-25 22:46:21,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24070 states. [2022-11-25 22:46:27,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24070 to 20909. [2022-11-25 22:46:27,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20909 states, 20908 states have (on average 1.4320355844652763) internal successors, (29941), 20908 states have internal predecessors, (29941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:46:27,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20909 states to 20909 states and 29941 transitions. [2022-11-25 22:46:27,570 INFO L78 Accepts]: Start accepts. Automaton has 20909 states and 29941 transitions. Word has length 74 [2022-11-25 22:46:27,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:46:27,570 INFO L495 AbstractCegarLoop]: Abstraction has 20909 states and 29941 transitions. [2022-11-25 22:46:27,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:46:27,570 INFO L276 IsEmpty]: Start isEmpty. Operand 20909 states and 29941 transitions. [2022-11-25 22:46:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 22:46:27,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:46:27,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:46:27,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-25 22:46:27,571 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:46:27,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:46:27,572 INFO L85 PathProgramCache]: Analyzing trace with hash 448149011, now seen corresponding path program 1 times [2022-11-25 22:46:27,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:46:27,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40297793] [2022-11-25 22:46:27,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:46:27,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:46:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:46:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:46:28,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:46:28,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40297793] [2022-11-25 22:46:28,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40297793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:46:28,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:46:28,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-25 22:46:28,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977378684] [2022-11-25 22:46:28,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:46:28,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 22:46:28,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:46:28,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 22:46:28,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:46:28,930 INFO L87 Difference]: Start difference. First operand 20909 states and 29941 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:46:38,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:46:38,616 INFO L93 Difference]: Finished difference Result 29866 states and 42693 transitions. [2022-11-25 22:46:38,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 22:46:38,617 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-25 22:46:38,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:46:38,661 INFO L225 Difference]: With dead ends: 29866 [2022-11-25 22:46:38,661 INFO L226 Difference]: Without dead ends: 29864 [2022-11-25 22:46:38,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=313, Invalid=877, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 22:46:38,669 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 775 mSDsluCounter, 2367 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 2714 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:46:38,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [775 Valid, 2714 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 22:46:38,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29864 states. [2022-11-25 22:46:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29864 to 20909. [2022-11-25 22:46:44,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20909 states, 20908 states have (on average 1.4320355844652763) internal successors, (29941), 20908 states have internal predecessors, (29941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:46:44,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20909 states to 20909 states and 29941 transitions. [2022-11-25 22:46:44,546 INFO L78 Accepts]: Start accepts. Automaton has 20909 states and 29941 transitions. Word has length 74 [2022-11-25 22:46:44,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:46:44,547 INFO L495 AbstractCegarLoop]: Abstraction has 20909 states and 29941 transitions. [2022-11-25 22:46:44,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:46:44,547 INFO L276 IsEmpty]: Start isEmpty. Operand 20909 states and 29941 transitions. [2022-11-25 22:46:44,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 22:46:44,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:46:44,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:46:44,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-25 22:46:44,549 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:46:44,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:46:44,549 INFO L85 PathProgramCache]: Analyzing trace with hash -490661389, now seen corresponding path program 1 times [2022-11-25 22:46:44,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:46:44,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533773442] [2022-11-25 22:46:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:46:44,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:46:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:46:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:46:45,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:46:45,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533773442] [2022-11-25 22:46:45,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533773442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:46:45,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:46:45,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-25 22:46:45,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129804349] [2022-11-25 22:46:45,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:46:45,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 22:46:45,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:46:45,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 22:46:45,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:46:45,887 INFO L87 Difference]: Start difference. First operand 20909 states and 29941 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:46:54,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:46:54,618 INFO L93 Difference]: Finished difference Result 25854 states and 36931 transitions. [2022-11-25 22:46:54,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 22:46:54,618 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-25 22:46:54,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:46:54,651 INFO L225 Difference]: With dead ends: 25854 [2022-11-25 22:46:54,651 INFO L226 Difference]: Without dead ends: 25852 [2022-11-25 22:46:54,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 22:46:54,657 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 693 mSDsluCounter, 2764 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 3172 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:46:54,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 3172 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 22:46:54,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25852 states. [2022-11-25 22:47:00,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25852 to 20909. [2022-11-25 22:47:00,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20909 states, 20908 states have (on average 1.4320355844652763) internal successors, (29941), 20908 states have internal predecessors, (29941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:47:00,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20909 states to 20909 states and 29941 transitions. [2022-11-25 22:47:00,554 INFO L78 Accepts]: Start accepts. Automaton has 20909 states and 29941 transitions. Word has length 74 [2022-11-25 22:47:00,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:47:00,555 INFO L495 AbstractCegarLoop]: Abstraction has 20909 states and 29941 transitions. [2022-11-25 22:47:00,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:47:00,555 INFO L276 IsEmpty]: Start isEmpty. Operand 20909 states and 29941 transitions. [2022-11-25 22:47:00,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 22:47:00,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:47:00,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:47:00,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-25 22:47:00,556 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:47:00,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:47:00,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1653129773, now seen corresponding path program 1 times [2022-11-25 22:47:00,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:47:00,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652328996] [2022-11-25 22:47:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:47:00,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:47:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:47:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:47:03,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:47:03,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652328996] [2022-11-25 22:47:03,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652328996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:47:03,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:47:03,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-25 22:47:03,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213575491] [2022-11-25 22:47:03,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:47:03,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 22:47:03,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:47:03,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 22:47:03,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-11-25 22:47:03,062 INFO L87 Difference]: Start difference. First operand 20909 states and 29941 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:47:14,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:47:14,210 INFO L93 Difference]: Finished difference Result 25902 states and 36980 transitions. [2022-11-25 22:47:14,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-25 22:47:14,215 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-25 22:47:14,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:47:14,258 INFO L225 Difference]: With dead ends: 25902 [2022-11-25 22:47:14,259 INFO L226 Difference]: Without dead ends: 25900 [2022-11-25 22:47:14,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=495, Invalid=1667, Unknown=0, NotChecked=0, Total=2162 [2022-11-25 22:47:14,267 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 863 mSDsluCounter, 2253 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 2572 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:47:14,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [863 Valid, 2572 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1479 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 22:47:14,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25900 states. [2022-11-25 22:47:20,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25900 to 20915. [2022-11-25 22:47:20,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20915 states, 20914 states have (on average 1.4319594529979918) internal successors, (29948), 20914 states have internal predecessors, (29948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:47:20,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20915 states to 20915 states and 29948 transitions. [2022-11-25 22:47:20,193 INFO L78 Accepts]: Start accepts. Automaton has 20915 states and 29948 transitions. Word has length 74 [2022-11-25 22:47:20,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:47:20,193 INFO L495 AbstractCegarLoop]: Abstraction has 20915 states and 29948 transitions. [2022-11-25 22:47:20,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:47:20,194 INFO L276 IsEmpty]: Start isEmpty. Operand 20915 states and 29948 transitions. [2022-11-25 22:47:20,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-25 22:47:20,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:47:20,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:47:20,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-25 22:47:20,195 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:47:20,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:47:20,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1902531037, now seen corresponding path program 1 times [2022-11-25 22:47:20,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:47:20,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091617486] [2022-11-25 22:47:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:47:20,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:47:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:47:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:47:20,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:47:20,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091617486] [2022-11-25 22:47:20,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091617486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:47:20,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:47:20,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:47:20,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955587829] [2022-11-25 22:47:20,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:47:20,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:47:20,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:47:20,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:47:20,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:47:20,248 INFO L87 Difference]: Start difference. First operand 20915 states and 29948 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:47:26,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:47:26,071 INFO L93 Difference]: Finished difference Result 37139 states and 53317 transitions. [2022-11-25 22:47:26,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:47:26,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2022-11-25 22:47:26,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:47:26,096 INFO L225 Difference]: With dead ends: 37139 [2022-11-25 22:47:26,096 INFO L226 Difference]: Without dead ends: 20143 [2022-11-25 22:47:26,111 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 [2022-11-25 22:47:26,112 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 137 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:47:26,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 351 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:47:26,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20143 states. [2022-11-25 22:47:31,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20143 to 20141. [2022-11-25 22:47:31,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20141 states, 20140 states have (on average 1.4298907646474677) internal successors, (28798), 20140 states have internal predecessors, (28798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:47:31,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20141 states to 20141 states and 28798 transitions. [2022-11-25 22:47:31,878 INFO L78 Accepts]: Start accepts. Automaton has 20141 states and 28798 transitions. Word has length 75 [2022-11-25 22:47:31,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:47:31,878 INFO L495 AbstractCegarLoop]: Abstraction has 20141 states and 28798 transitions. [2022-11-25 22:47:31,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:47:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 20141 states and 28798 transitions. [2022-11-25 22:47:31,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-25 22:47:31,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:47:31,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:47:31,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-25 22:47:31,880 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:47:31,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:47:31,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1245811929, now seen corresponding path program 1 times [2022-11-25 22:47:31,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:47:31,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617544331] [2022-11-25 22:47:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:47:31,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:47:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:47:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:47:36,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:47:36,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617544331] [2022-11-25 22:47:36,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617544331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:47:36,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:47:36,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-11-25 22:47:36,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127753841] [2022-11-25 22:47:36,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:47:36,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 22:47:36,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:47:36,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 22:47:36,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 22:47:36,826 INFO L87 Difference]: Start difference. First operand 20141 states and 28798 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:47:54,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:47:54,021 INFO L93 Difference]: Finished difference Result 25081 states and 35829 transitions. [2022-11-25 22:47:54,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-25 22:47:54,022 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-25 22:47:54,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:47:54,053 INFO L225 Difference]: With dead ends: 25081 [2022-11-25 22:47:54,053 INFO L226 Difference]: Without dead ends: 23223 [2022-11-25 22:47:54,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1063, Invalid=3359, Unknown=0, NotChecked=0, Total=4422 [2022-11-25 22:47:54,062 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 1174 mSDsluCounter, 3690 mSDsCounter, 0 mSdLazyCounter, 2624 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 4035 SdHoareTripleChecker+Invalid, 2632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:47:54,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1174 Valid, 4035 Invalid, 2632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2624 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-25 22:47:54,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23223 states. [2022-11-25 22:47:59,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23223 to 20125. [2022-11-25 22:47:59,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20125 states, 20124 states have (on average 1.4301828662293778) internal successors, (28781), 20124 states have internal predecessors, (28781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:47:59,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20125 states to 20125 states and 28781 transitions. [2022-11-25 22:47:59,748 INFO L78 Accepts]: Start accepts. Automaton has 20125 states and 28781 transitions. Word has length 76 [2022-11-25 22:47:59,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:47:59,749 INFO L495 AbstractCegarLoop]: Abstraction has 20125 states and 28781 transitions. [2022-11-25 22:47:59,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:47:59,749 INFO L276 IsEmpty]: Start isEmpty. Operand 20125 states and 28781 transitions. [2022-11-25 22:47:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-25 22:47:59,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:47:59,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:47:59,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-25 22:47:59,750 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:47:59,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:47:59,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2110787335, now seen corresponding path program 1 times [2022-11-25 22:47:59,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:47:59,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471556451] [2022-11-25 22:47:59,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:47:59,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:47:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:48:05,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:48:05,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:48:05,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471556451] [2022-11-25 22:48:05,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471556451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:48:05,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:48:05,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-11-25 22:48:05,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921425214] [2022-11-25 22:48:05,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:48:05,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 22:48:05,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:48:05,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 22:48:05,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 22:48:05,613 INFO L87 Difference]: Start difference. First operand 20125 states and 28781 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:48:23,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:48:23,718 INFO L93 Difference]: Finished difference Result 23137 states and 33019 transitions. [2022-11-25 22:48:23,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-25 22:48:23,719 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-25 22:48:23,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:48:23,744 INFO L225 Difference]: With dead ends: 23137 [2022-11-25 22:48:23,744 INFO L226 Difference]: Without dead ends: 23135 [2022-11-25 22:48:23,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1114, Invalid=3176, Unknown=0, NotChecked=0, Total=4290 [2022-11-25 22:48:23,749 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 1453 mSDsluCounter, 2507 mSDsCounter, 0 mSdLazyCounter, 3441 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1453 SdHoareTripleChecker+Valid, 2846 SdHoareTripleChecker+Invalid, 3456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:48:23,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1453 Valid, 2846 Invalid, 3456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3441 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-25 22:48:23,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23135 states. [2022-11-25 22:48:29,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23135 to 20115. [2022-11-25 22:48:29,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20115 states, 20114 states have (on average 1.4302973053594512) internal successors, (28769), 20114 states have internal predecessors, (28769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:48:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20115 states to 20115 states and 28769 transitions. [2022-11-25 22:48:29,371 INFO L78 Accepts]: Start accepts. Automaton has 20115 states and 28769 transitions. Word has length 76 [2022-11-25 22:48:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:48:29,371 INFO L495 AbstractCegarLoop]: Abstraction has 20115 states and 28769 transitions. [2022-11-25 22:48:29,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:48:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 20115 states and 28769 transitions. [2022-11-25 22:48:29,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-25 22:48:29,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:48:29,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:48:29,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-25 22:48:29,372 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:48:29,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:48:29,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1171976935, now seen corresponding path program 1 times [2022-11-25 22:48:29,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:48:29,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272620645] [2022-11-25 22:48:29,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:48:29,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:48:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:48:35,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:48:35,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:48:35,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272620645] [2022-11-25 22:48:35,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272620645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:48:35,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:48:35,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-11-25 22:48:35,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850538603] [2022-11-25 22:48:35,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:48:35,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 22:48:35,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:48:35,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 22:48:35,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 22:48:35,784 INFO L87 Difference]: Start difference. First operand 20115 states and 28769 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:48:52,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:48:52,951 INFO L93 Difference]: Finished difference Result 23101 states and 32981 transitions. [2022-11-25 22:48:52,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-25 22:48:52,952 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-25 22:48:52,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:48:52,981 INFO L225 Difference]: With dead ends: 23101 [2022-11-25 22:48:52,981 INFO L226 Difference]: Without dead ends: 23099 [2022-11-25 22:48:52,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=879, Invalid=2781, Unknown=0, NotChecked=0, Total=3660 [2022-11-25 22:48:52,986 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 1204 mSDsluCounter, 2799 mSDsCounter, 0 mSdLazyCounter, 3825 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 3131 SdHoareTripleChecker+Invalid, 3836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:48:52,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1204 Valid, 3131 Invalid, 3836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3825 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-25 22:48:53,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23099 states. [2022-11-25 22:48:59,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23099 to 21957. [2022-11-25 22:48:59,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21957 states, 21956 states have (on average 1.4284933503370376) internal successors, (31364), 21956 states have internal predecessors, (31364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:48:59,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21957 states to 21957 states and 31364 transitions. [2022-11-25 22:48:59,257 INFO L78 Accepts]: Start accepts. Automaton has 21957 states and 31364 transitions. Word has length 76 [2022-11-25 22:48:59,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:48:59,258 INFO L495 AbstractCegarLoop]: Abstraction has 21957 states and 31364 transitions. [2022-11-25 22:48:59,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:48:59,258 INFO L276 IsEmpty]: Start isEmpty. Operand 21957 states and 31364 transitions. [2022-11-25 22:48:59,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-25 22:48:59,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:48:59,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:48:59,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-25 22:48:59,259 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:48:59,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:48:59,260 INFO L85 PathProgramCache]: Analyzing trace with hash 9508551, now seen corresponding path program 1 times [2022-11-25 22:48:59,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:48:59,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365831595] [2022-11-25 22:48:59,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:48:59,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:48:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:49:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:49:06,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:49:06,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365831595] [2022-11-25 22:49:06,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365831595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:49:06,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:49:06,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-11-25 22:49:06,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560943334] [2022-11-25 22:49:06,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:49:06,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-25 22:49:06,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:49:06,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-25 22:49:06,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 22:49:06,266 INFO L87 Difference]: Start difference. First operand 21957 states and 31364 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:49:27,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:49:27,124 INFO L93 Difference]: Finished difference Result 25005 states and 35642 transitions. [2022-11-25 22:49:27,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-25 22:49:27,124 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-25 22:49:27,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:49:27,155 INFO L225 Difference]: With dead ends: 25005 [2022-11-25 22:49:27,155 INFO L226 Difference]: Without dead ends: 25003 [2022-11-25 22:49:27,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1057, Invalid=3365, Unknown=0, NotChecked=0, Total=4422 [2022-11-25 22:49:27,160 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 1486 mSDsluCounter, 3686 mSDsCounter, 0 mSdLazyCounter, 5567 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 4018 SdHoareTripleChecker+Invalid, 5587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 5567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:49:27,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1486 Valid, 4018 Invalid, 5587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 5567 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-25 22:49:27,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25003 states. [2022-11-25 22:49:33,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25003 to 21957. [2022-11-25 22:49:33,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21957 states, 21956 states have (on average 1.4284933503370376) internal successors, (31364), 21956 states have internal predecessors, (31364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:49:33,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21957 states to 21957 states and 31364 transitions. [2022-11-25 22:49:33,317 INFO L78 Accepts]: Start accepts. Automaton has 21957 states and 31364 transitions. Word has length 76 [2022-11-25 22:49:33,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:49:33,317 INFO L495 AbstractCegarLoop]: Abstraction has 21957 states and 31364 transitions. [2022-11-25 22:49:33,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:49:33,318 INFO L276 IsEmpty]: Start isEmpty. Operand 21957 states and 31364 transitions. [2022-11-25 22:49:33,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-25 22:49:33,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:49:33,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:49:33,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-25 22:49:33,319 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:49:33,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:49:33,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1369733799, now seen corresponding path program 1 times [2022-11-25 22:49:33,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:49:33,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220558469] [2022-11-25 22:49:33,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:49:33,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:49:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:49:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:49:39,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:49:39,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220558469] [2022-11-25 22:49:39,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220558469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:49:39,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:49:39,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-11-25 22:49:39,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550388984] [2022-11-25 22:49:39,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:49:39,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 22:49:39,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:49:39,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 22:49:39,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 22:49:39,267 INFO L87 Difference]: Start difference. First operand 21957 states and 31364 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:49:58,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:49:58,707 INFO L93 Difference]: Finished difference Result 25000 states and 35638 transitions. [2022-11-25 22:49:58,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 22:49:58,707 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-25 22:49:58,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:49:58,747 INFO L225 Difference]: With dead ends: 25000 [2022-11-25 22:49:58,747 INFO L226 Difference]: Without dead ends: 24998 [2022-11-25 22:49:58,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=771, Invalid=3011, Unknown=0, NotChecked=0, Total=3782 [2022-11-25 22:49:58,755 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 1262 mSDsluCounter, 2710 mSDsCounter, 0 mSdLazyCounter, 3958 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1262 SdHoareTripleChecker+Valid, 3031 SdHoareTripleChecker+Invalid, 3968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:49:58,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1262 Valid, 3031 Invalid, 3968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3958 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-25 22:49:58,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24998 states. [2022-11-25 22:50:05,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24998 to 21957. [2022-11-25 22:50:05,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21957 states, 21956 states have (on average 1.4284933503370376) internal successors, (31364), 21956 states have internal predecessors, (31364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:50:05,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21957 states to 21957 states and 31364 transitions. [2022-11-25 22:50:05,226 INFO L78 Accepts]: Start accepts. Automaton has 21957 states and 31364 transitions. Word has length 76 [2022-11-25 22:50:05,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:50:05,226 INFO L495 AbstractCegarLoop]: Abstraction has 21957 states and 31364 transitions. [2022-11-25 22:50:05,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:50:05,226 INFO L276 IsEmpty]: Start isEmpty. Operand 21957 states and 31364 transitions. [2022-11-25 22:50:05,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-25 22:50:05,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:50:05,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:50:05,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-11-25 22:50:05,228 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:50:05,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:50:05,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1437329051, now seen corresponding path program 1 times [2022-11-25 22:50:05,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:50:05,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774791993] [2022-11-25 22:50:05,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:50:05,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:50:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:50:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:50:17,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:50:17,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774791993] [2022-11-25 22:50:17,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774791993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:50:17,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:50:17,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-11-25 22:50:17,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093824571] [2022-11-25 22:50:17,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:50:17,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-25 22:50:17,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:50:17,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-25 22:50:17,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1571, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 22:50:17,570 INFO L87 Difference]: Start difference. First operand 21957 states and 31364 transitions. Second operand has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 41 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:50:49,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:50:49,646 INFO L93 Difference]: Finished difference Result 24947 states and 35582 transitions. [2022-11-25 22:50:49,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-25 22:50:49,647 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 41 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2022-11-25 22:50:49,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:50:49,680 INFO L225 Difference]: With dead ends: 24947 [2022-11-25 22:50:49,681 INFO L226 Difference]: Without dead ends: 24945 [2022-11-25 22:50:49,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=1202, Invalid=4498, Unknown=0, NotChecked=0, Total=5700 [2022-11-25 22:50:49,686 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 1306 mSDsluCounter, 3253 mSDsCounter, 0 mSdLazyCounter, 6075 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1306 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 6078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:50:49,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1306 Valid, 3584 Invalid, 6078 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 6075 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2022-11-25 22:50:49,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24945 states. [2022-11-25 22:50:56,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24945 to 21933. [2022-11-25 22:50:56,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21933 states, 21932 states have (on average 1.4288710559912456) internal successors, (31338), 21932 states have internal predecessors, (31338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:50:56,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21933 states to 21933 states and 31338 transitions. [2022-11-25 22:50:56,874 INFO L78 Accepts]: Start accepts. Automaton has 21933 states and 31338 transitions. Word has length 78 [2022-11-25 22:50:56,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:50:56,874 INFO L495 AbstractCegarLoop]: Abstraction has 21933 states and 31338 transitions. [2022-11-25 22:50:56,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 41 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:50:56,874 INFO L276 IsEmpty]: Start isEmpty. Operand 21933 states and 31338 transitions. [2022-11-25 22:50:56,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-25 22:50:56,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:50:56,877 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:50:56,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-25 22:50:56,877 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:50:56,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:50:56,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1503727214, now seen corresponding path program 1 times [2022-11-25 22:50:56,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:50:56,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483028265] [2022-11-25 22:50:56,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:50:56,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:50:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:50:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:50:56,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:50:56,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483028265] [2022-11-25 22:50:56,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483028265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:50:56,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:50:56,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:50:56,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612763404] [2022-11-25 22:50:56,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:50:56,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:50:56,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:50:56,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:50:56,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:50:56,968 INFO L87 Difference]: Start difference. First operand 21933 states and 31338 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:51:05,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:51:05,601 INFO L93 Difference]: Finished difference Result 33408 states and 48056 transitions. [2022-11-25 22:51:05,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:51:05,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2022-11-25 22:51:05,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:51:05,640 INFO L225 Difference]: With dead ends: 33408 [2022-11-25 22:51:05,641 INFO L226 Difference]: Without dead ends: 26286 [2022-11-25 22:51:05,647 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 [2022-11-25 22:51:05,648 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 98 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 416 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 [2022-11-25 22:51:05,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 416 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:51:05,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26286 states. [2022-11-25 22:51:13,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26286 to 25252. [2022-11-25 22:51:13,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25252 states, 25251 states have (on average 1.4280226525682151) internal successors, (36059), 25251 states have internal predecessors, (36059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:51:13,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25252 states to 25252 states and 36059 transitions. [2022-11-25 22:51:13,126 INFO L78 Accepts]: Start accepts. Automaton has 25252 states and 36059 transitions. Word has length 83 [2022-11-25 22:51:13,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:51:13,126 INFO L495 AbstractCegarLoop]: Abstraction has 25252 states and 36059 transitions. [2022-11-25 22:51:13,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:51:13,126 INFO L276 IsEmpty]: Start isEmpty. Operand 25252 states and 36059 transitions. [2022-11-25 22:51:13,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-25 22:51:13,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:51:13,131 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:51:13,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-11-25 22:51:13,131 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:51:13,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:51:13,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2108725483, now seen corresponding path program 1 times [2022-11-25 22:51:13,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:51:13,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210303489] [2022-11-25 22:51:13,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:51:13,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:51:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:51:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:51:13,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:51:13,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210303489] [2022-11-25 22:51:13,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210303489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:51:13,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:51:13,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:51:13,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554634640] [2022-11-25 22:51:13,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:51:13,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:51:13,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:51:13,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:51:13,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:51:13,184 INFO L87 Difference]: Start difference. First operand 25252 states and 36059 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:51:26,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:51:26,732 INFO L93 Difference]: Finished difference Result 61794 states and 88311 transitions. [2022-11-25 22:51:26,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:51:26,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2022-11-25 22:51:26,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:51:26,827 INFO L225 Difference]: With dead ends: 61794 [2022-11-25 22:51:26,827 INFO L226 Difference]: Without dead ends: 38736 [2022-11-25 22:51:26,850 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 [2022-11-25 22:51:26,851 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 106 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:51:26,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 444 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:51:26,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38736 states. [2022-11-25 22:51:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38736 to 38734. [2022-11-25 22:51:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38734 states, 38733 states have (on average 1.4188676322515685) internal successors, (54957), 38733 states have internal predecessors, (54957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:51:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38734 states to 38734 states and 54957 transitions. [2022-11-25 22:51:40,957 INFO L78 Accepts]: Start accepts. Automaton has 38734 states and 54957 transitions. Word has length 86 [2022-11-25 22:51:40,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:51:40,958 INFO L495 AbstractCegarLoop]: Abstraction has 38734 states and 54957 transitions. [2022-11-25 22:51:40,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:51:40,959 INFO L276 IsEmpty]: Start isEmpty. Operand 38734 states and 54957 transitions. [2022-11-25 22:51:40,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-25 22:51:40,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:51:40,961 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:51:40,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-25 22:51:40,961 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:51:40,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:51:40,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1864404235, now seen corresponding path program 1 times [2022-11-25 22:51:40,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:51:40,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975252564] [2022-11-25 22:51:40,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:51:40,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:51:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:51:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:51:41,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:51:41,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975252564] [2022-11-25 22:51:41,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975252564] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:51:41,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:51:41,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:51:41,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96353821] [2022-11-25 22:51:41,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:51:41,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:51:41,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:51:41,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:51:41,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:51:41,066 INFO L87 Difference]: Start difference. First operand 38734 states and 54957 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:51:57,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:51:57,796 INFO L93 Difference]: Finished difference Result 66385 states and 94877 transitions. [2022-11-25 22:51:57,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:51:57,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2022-11-25 22:51:57,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:51:57,872 INFO L225 Difference]: With dead ends: 66385 [2022-11-25 22:51:57,872 INFO L226 Difference]: Without dead ends: 49103 [2022-11-25 22:51:57,892 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 [2022-11-25 22:51:57,893 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 93 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 397 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 [2022-11-25 22:51:57,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 397 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:51:57,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49103 states.