./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b39b51-9159-4f47-8332-6f2be0393c7e/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b39b51-9159-4f47-8332-6f2be0393c7e/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_12b39b51-9159-4f47-8332-6f2be0393c7e/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b39b51-9159-4f47-8332-6f2be0393c7e/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b39b51-9159-4f47-8332-6f2be0393c7e/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_12b39b51-9159-4f47-8332-6f2be0393c7e/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 d7923672572112c1e23e765d37ba0d9265e37954a51bbbf4393296aaafd9ce3e --- 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 23:42:21,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:42:21,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:42:21,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:42:21,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:42:21,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:42:21,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:42:21,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:42:21,231 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:42:21,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:42:21,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:42:21,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:42:21,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:42:21,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:42:21,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:42:21,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:42:21,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:42:21,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:42:21,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:42:21,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:42:21,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:42:21,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:42:21,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:42:21,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:42:21,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:42:21,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:42:21,287 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:42:21,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:42:21,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:42:21,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:42:21,293 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:42:21,294 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:42:21,296 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:42:21,297 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:42:21,299 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:42:21,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:42:21,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:42:21,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:42:21,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:42:21,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:42:21,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:42:21,304 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b39b51-9159-4f47-8332-6f2be0393c7e/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:42:21,347 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:42:21,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:42:21,348 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:42:21,349 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:42:21,350 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:42:21,350 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:42:21,350 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:42:21,351 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:42:21,351 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:42:21,351 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:42:21,352 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:42:21,353 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:42:21,353 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:42:21,353 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:42:21,353 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:42:21,354 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:42:21,354 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:42:21,354 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:42:21,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:42:21,356 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:42:21,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:42:21,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:42:21,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:42:21,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:42:21,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:42:21,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:42:21,358 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:42:21,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:42:21,359 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:42:21,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:42:21,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:42:21,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:42:21,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:42:21,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:42:21,361 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:42:21,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:42:21,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:42:21,362 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:42:21,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:42:21,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:42:21,362 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:42:21,364 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_12b39b51-9159-4f47-8332-6f2be0393c7e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b39b51-9159-4f47-8332-6f2be0393c7e/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7923672572112c1e23e765d37ba0d9265e37954a51bbbf4393296aaafd9ce3e [2022-11-25 23:42:21,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:42:21,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:42:21,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:42:21,693 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:42:21,700 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:42:21,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b39b51-9159-4f47-8332-6f2be0393c7e/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2022-11-25 23:42:24,791 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:42:25,203 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:42:25,204 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b39b51-9159-4f47-8332-6f2be0393c7e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2022-11-25 23:42:25,227 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b39b51-9159-4f47-8332-6f2be0393c7e/bin/utaipan-ByfvJB40ur/data/46b9df26b/ea5b7885b7a44bf8bcc5ac8976e61d94/FLAG45f159cc0 [2022-11-25 23:42:25,244 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b39b51-9159-4f47-8332-6f2be0393c7e/bin/utaipan-ByfvJB40ur/data/46b9df26b/ea5b7885b7a44bf8bcc5ac8976e61d94 [2022-11-25 23:42:25,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:42:25,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:42:25,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:42:25,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:42:25,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:42:25,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:42:25" (1/1) ... [2022-11-25 23:42:25,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53781aab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:25, skipping insertion in model container [2022-11-25 23:42:25,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:42:25" (1/1) ... [2022-11-25 23:42:25,265 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:42:25,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:42:25,767 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_12b39b51-9159-4f47-8332-6f2be0393c7e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[9988,10001] [2022-11-25 23:42:25,879 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_12b39b51-9159-4f47-8332-6f2be0393c7e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[24517,24530] [2022-11-25 23:42:26,193 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:42:26,209 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:42:26,281 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_12b39b51-9159-4f47-8332-6f2be0393c7e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[9988,10001] [2022-11-25 23:42:26,357 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_12b39b51-9159-4f47-8332-6f2be0393c7e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[24517,24530] [2022-11-25 23:42:26,574 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:42:26,602 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:42:26,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:26 WrapperNode [2022-11-25 23:42:26,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:42:26,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:42:26,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:42:26,606 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:42:26,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:26" (1/1) ... [2022-11-25 23:42:26,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:26" (1/1) ... [2022-11-25 23:42:26,837 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 3378 [2022-11-25 23:42:26,837 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:42:26,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:42:26,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:42:26,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:42:26,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:26" (1/1) ... [2022-11-25 23:42:26,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:26" (1/1) ... [2022-11-25 23:42:26,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:26" (1/1) ... [2022-11-25 23:42:26,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:26" (1/1) ... [2022-11-25 23:42:26,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:26" (1/1) ... [2022-11-25 23:42:26,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:26" (1/1) ... [2022-11-25 23:42:26,977 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:26" (1/1) ... [2022-11-25 23:42:26,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:26" (1/1) ... [2022-11-25 23:42:27,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:42:27,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:42:27,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:42:27,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:42:27,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:26" (1/1) ... [2022-11-25 23:42:27,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:42:27,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b39b51-9159-4f47-8332-6f2be0393c7e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:42:27,064 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b39b51-9159-4f47-8332-6f2be0393c7e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:42:27,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b39b51-9159-4f47-8332-6f2be0393c7e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:42:27,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:42:27,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:42:27,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:42:27,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:42:27,445 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:42:27,448 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:42:29,851 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:42:30,078 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:42:30,078 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 23:42:30,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:42:30 BoogieIcfgContainer [2022-11-25 23:42:30,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:42:30,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:42:30,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:42:30,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:42:30,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:42:25" (1/3) ... [2022-11-25 23:42:30,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72524f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:42:30, skipping insertion in model container [2022-11-25 23:42:30,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:26" (2/3) ... [2022-11-25 23:42:30,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72524f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:42:30, skipping insertion in model container [2022-11-25 23:42:30,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:42:30" (3/3) ... [2022-11-25 23:42:30,092 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2022-11-25 23:42:30,113 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:42:30,114 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 23:42:30,182 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:42:30,189 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;@12bbb609, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:42:30,189 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 23:42:30,201 INFO L276 IsEmpty]: Start isEmpty. Operand has 662 states, 659 states have (on average 1.7890743550834598) internal successors, (1179), 661 states have internal predecessors, (1179), 0 states have call successors, (0), 0 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 23:42:30,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-25 23:42:30,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:30,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:42:30,238 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:42:30,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:30,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1229301387, now seen corresponding path program 1 times [2022-11-25 23:42:30,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:42:30,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333139492] [2022-11-25 23:42:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:30,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:42:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:30,830 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 23:42:30,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:42:30,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333139492] [2022-11-25 23:42:30,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333139492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:42:30,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:42:30,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:42:30,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069657063] [2022-11-25 23:42:30,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:42:30,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:42:30,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:42:30,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:42:30,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:42:30,878 INFO L87 Difference]: Start difference. First operand has 662 states, 659 states have (on average 1.7890743550834598) internal successors, (1179), 661 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:42:31,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:42:31,158 INFO L93 Difference]: Finished difference Result 959 states and 1669 transitions. [2022-11-25 23:42:31,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:42:31,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-25 23:42:31,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:42:31,187 INFO L225 Difference]: With dead ends: 959 [2022-11-25 23:42:31,188 INFO L226 Difference]: Without dead ends: 779 [2022-11-25 23:42:31,192 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 23:42:31,196 INFO L413 NwaCegarLoop]: 1166 mSDtfsCounter, 588 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1916 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:42:31,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 1916 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:42:31,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-11-25 23:42:31,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 777. [2022-11-25 23:42:31,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 775 states have (on average 1.343225806451613) internal successors, (1041), 776 states have internal predecessors, (1041), 0 states have call successors, (0), 0 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 23:42:31,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1041 transitions. [2022-11-25 23:42:31,307 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1041 transitions. Word has length 61 [2022-11-25 23:42:31,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:42:31,308 INFO L495 AbstractCegarLoop]: Abstraction has 777 states and 1041 transitions. [2022-11-25 23:42:31,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:42:31,309 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1041 transitions. [2022-11-25 23:42:31,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-25 23:42:31,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:31,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:42:31,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:42:31,313 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:42:31,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:31,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1202740473, now seen corresponding path program 1 times [2022-11-25 23:42:31,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:42:31,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754359369] [2022-11-25 23:42:31,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:31,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:42:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:31,491 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 23:42:31,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:42:31,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754359369] [2022-11-25 23:42:31,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754359369] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:42:31,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:42:31,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:42:31,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784879756] [2022-11-25 23:42:31,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:42:31,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:42:31,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:42:31,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:42:31,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:42:31,503 INFO L87 Difference]: Start difference. First operand 777 states and 1041 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:42:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:42:31,805 INFO L93 Difference]: Finished difference Result 1290 states and 1726 transitions. [2022-11-25 23:42:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:42:31,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-11-25 23:42:31,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:42:31,815 INFO L225 Difference]: With dead ends: 1290 [2022-11-25 23:42:31,815 INFO L226 Difference]: Without dead ends: 1107 [2022-11-25 23:42:31,820 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 23:42:31,822 INFO L413 NwaCegarLoop]: 951 mSDtfsCounter, 499 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:42:31,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 1525 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:42:31,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2022-11-25 23:42:31,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1103. [2022-11-25 23:42:31,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1101 states have (on average 1.32425068119891) internal successors, (1458), 1102 states have internal predecessors, (1458), 0 states have call successors, (0), 0 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 23:42:31,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1458 transitions. [2022-11-25 23:42:31,922 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1458 transitions. Word has length 62 [2022-11-25 23:42:31,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:42:31,923 INFO L495 AbstractCegarLoop]: Abstraction has 1103 states and 1458 transitions. [2022-11-25 23:42:31,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 23:42:31,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1458 transitions. [2022-11-25 23:42:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-25 23:42:31,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:31,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:42:31,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:42:31,928 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:42:31,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:31,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1419941485, now seen corresponding path program 1 times [2022-11-25 23:42:31,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:42:31,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695386920] [2022-11-25 23:42:31,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:31,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:42:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:32,153 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 23:42:32,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:42:32,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695386920] [2022-11-25 23:42:32,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695386920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:42:32,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:42:32,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:42:32,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472065191] [2022-11-25 23:42:32,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:42:32,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:42:32,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:42:32,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:42:32,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:42:32,158 INFO L87 Difference]: Start difference. First operand 1103 states and 1458 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:42:32,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:42:32,361 INFO L93 Difference]: Finished difference Result 1896 states and 2572 transitions. [2022-11-25 23:42:32,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:42:32,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-11-25 23:42:32,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:42:32,369 INFO L225 Difference]: With dead ends: 1896 [2022-11-25 23:42:32,369 INFO L226 Difference]: Without dead ends: 1478 [2022-11-25 23:42:32,371 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 23:42:32,372 INFO L413 NwaCegarLoop]: 863 mSDtfsCounter, 445 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:42:32,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 1419 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:42:32,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2022-11-25 23:42:32,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1474. [2022-11-25 23:42:32,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1472 states have (on average 1.3376358695652173) internal successors, (1969), 1473 states have internal predecessors, (1969), 0 states have call successors, (0), 0 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 23:42:32,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 1969 transitions. [2022-11-25 23:42:32,480 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 1969 transitions. Word has length 62 [2022-11-25 23:42:32,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:42:32,480 INFO L495 AbstractCegarLoop]: Abstraction has 1474 states and 1969 transitions. [2022-11-25 23:42:32,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 23:42:32,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 1969 transitions. [2022-11-25 23:42:32,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-25 23:42:32,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:32,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:42:32,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 23:42:32,485 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:42:32,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:32,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1452563052, now seen corresponding path program 1 times [2022-11-25 23:42:32,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:42:32,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062872546] [2022-11-25 23:42:32,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:32,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:42:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:32,637 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 23:42:32,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:42:32,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062872546] [2022-11-25 23:42:32,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062872546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:42:32,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:42:32,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:42:32,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269996734] [2022-11-25 23:42:32,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:42:32,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:42:32,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:42:32,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:42:32,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:42:32,641 INFO L87 Difference]: Start difference. First operand 1474 states and 1969 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:42:33,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:42:33,586 INFO L93 Difference]: Finished difference Result 3114 states and 4236 transitions. [2022-11-25 23:42:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:42:33,587 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-11-25 23:42:33,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:42:33,595 INFO L225 Difference]: With dead ends: 3114 [2022-11-25 23:42:33,596 INFO L226 Difference]: Without dead ends: 1863 [2022-11-25 23:42:33,598 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 23:42:33,600 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 2233 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2233 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:42:33,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2233 Valid, 502 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:42:33,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2022-11-25 23:42:33,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1861. [2022-11-25 23:42:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1859 states have (on average 1.3550295857988166) internal successors, (2519), 1860 states have internal predecessors, (2519), 0 states have call successors, (0), 0 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 23:42:33,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 2519 transitions. [2022-11-25 23:42:33,818 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 2519 transitions. Word has length 62 [2022-11-25 23:42:33,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:42:33,819 INFO L495 AbstractCegarLoop]: Abstraction has 1861 states and 2519 transitions. [2022-11-25 23:42:33,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:42:33,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 2519 transitions. [2022-11-25 23:42:33,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-25 23:42:33,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:33,825 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] [2022-11-25 23:42:33,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 23:42:33,826 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:42:33,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:33,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1875740527, now seen corresponding path program 1 times [2022-11-25 23:42:33,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:42:33,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406730130] [2022-11-25 23:42:33,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:33,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:42:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:33,959 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 23:42:33,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:42:33,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406730130] [2022-11-25 23:42:33,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406730130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:42:33,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:42:33,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:42:33,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897820351] [2022-11-25 23:42:33,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:42:33,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:42:33,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:42:33,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:42:33,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:42:33,966 INFO L87 Difference]: Start difference. First operand 1861 states and 2519 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:42:34,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:42:34,352 INFO L93 Difference]: Finished difference Result 3997 states and 5482 transitions. [2022-11-25 23:42:34,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:42:34,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-25 23:42:34,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:42:34,364 INFO L225 Difference]: With dead ends: 3997 [2022-11-25 23:42:34,365 INFO L226 Difference]: Without dead ends: 2876 [2022-11-25 23:42:34,367 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 23:42:34,368 INFO L413 NwaCegarLoop]: 863 mSDtfsCounter, 537 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:42:34,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 1325 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:42:34,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2022-11-25 23:42:34,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2874. [2022-11-25 23:42:34,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2874 states, 2872 states have (on average 1.3506267409470751) internal successors, (3879), 2873 states have internal predecessors, (3879), 0 states have call successors, (0), 0 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 23:42:34,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2874 states to 2874 states and 3879 transitions. [2022-11-25 23:42:34,712 INFO L78 Accepts]: Start accepts. Automaton has 2874 states and 3879 transitions. Word has length 63 [2022-11-25 23:42:34,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:42:34,712 INFO L495 AbstractCegarLoop]: Abstraction has 2874 states and 3879 transitions. [2022-11-25 23:42:34,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:42:34,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2874 states and 3879 transitions. [2022-11-25 23:42:34,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-25 23:42:34,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:34,718 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] [2022-11-25 23:42:34,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 23:42:34,719 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:42:34,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:34,720 INFO L85 PathProgramCache]: Analyzing trace with hash 143702479, now seen corresponding path program 1 times [2022-11-25 23:42:34,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:42:34,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380492721] [2022-11-25 23:42:34,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:34,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:42:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:34,846 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 23:42:34,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:42:34,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380492721] [2022-11-25 23:42:34,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380492721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:42:34,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:42:34,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:42:34,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880629154] [2022-11-25 23:42:34,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:42:34,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:42:34,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:42:34,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:42:34,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:42:34,849 INFO L87 Difference]: Start difference. First operand 2874 states and 3879 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 23:42:35,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:42:35,911 INFO L93 Difference]: Finished difference Result 6684 states and 9132 transitions. [2022-11-25 23:42:35,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:42:35,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2022-11-25 23:42:35,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:42:35,927 INFO L225 Difference]: With dead ends: 6684 [2022-11-25 23:42:35,928 INFO L226 Difference]: Without dead ends: 4143 [2022-11-25 23:42:35,931 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 23:42:35,932 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 1958 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1958 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:42:35,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1958 Valid, 436 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:42:35,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2022-11-25 23:42:36,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 4139. [2022-11-25 23:42:36,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 4137 states have (on average 1.3579888808315204) internal successors, (5618), 4138 states have internal predecessors, (5618), 0 states have call successors, (0), 0 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 23:42:36,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 5618 transitions. [2022-11-25 23:42:36,505 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 5618 transitions. Word has length 64 [2022-11-25 23:42:36,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:42:36,506 INFO L495 AbstractCegarLoop]: Abstraction has 4139 states and 5618 transitions. [2022-11-25 23:42:36,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 23:42:36,506 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 5618 transitions. [2022-11-25 23:42:36,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-25 23:42:36,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:36,511 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] [2022-11-25 23:42:36,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 23:42:36,512 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:42:36,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:36,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1303417230, now seen corresponding path program 1 times [2022-11-25 23:42:36,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:42:36,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548784913] [2022-11-25 23:42:36,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:36,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:42:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:36,646 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 23:42:36,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:42:36,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548784913] [2022-11-25 23:42:36,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548784913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:42:36,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:42:36,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:42:36,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124348974] [2022-11-25 23:42:36,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:42:36,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:42:36,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:42:36,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:42:36,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:42:36,650 INFO L87 Difference]: Start difference. First operand 4139 states and 5618 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:42:38,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:42:38,117 INFO L93 Difference]: Finished difference Result 10721 states and 14692 transitions. [2022-11-25 23:42:38,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:42:38,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-25 23:42:38,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:42:38,145 INFO L225 Difference]: With dead ends: 10721 [2022-11-25 23:42:38,145 INFO L226 Difference]: Without dead ends: 6866 [2022-11-25 23:42:38,152 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 23:42:38,155 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 1965 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1965 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:42:38,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1965 Valid, 471 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:42:38,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6866 states. [2022-11-25 23:42:38,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6866 to 5339. [2022-11-25 23:42:38,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5339 states, 5337 states have (on average 1.3672475173318344) internal successors, (7297), 5338 states have internal predecessors, (7297), 0 states have call successors, (0), 0 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 23:42:38,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5339 states to 5339 states and 7297 transitions. [2022-11-25 23:42:38,973 INFO L78 Accepts]: Start accepts. Automaton has 5339 states and 7297 transitions. Word has length 65 [2022-11-25 23:42:38,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:42:38,974 INFO L495 AbstractCegarLoop]: Abstraction has 5339 states and 7297 transitions. [2022-11-25 23:42:38,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:42:38,974 INFO L276 IsEmpty]: Start isEmpty. Operand 5339 states and 7297 transitions. [2022-11-25 23:42:38,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-25 23:42:38,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:38,981 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] [2022-11-25 23:42:38,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 23:42:38,982 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:42:38,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:38,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1163054926, now seen corresponding path program 1 times [2022-11-25 23:42:38,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:42:38,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689307502] [2022-11-25 23:42:38,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:38,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:42:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:39,231 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 23:42:39,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:42:39,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689307502] [2022-11-25 23:42:39,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689307502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:42:39,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:42:39,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:42:39,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804822265] [2022-11-25 23:42:39,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:42:39,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:42:39,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:42:39,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:42:39,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:42:39,235 INFO L87 Difference]: Start difference. First operand 5339 states and 7297 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:42:42,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:42:42,780 INFO L93 Difference]: Finished difference Result 19626 states and 27358 transitions. [2022-11-25 23:42:42,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:42:42,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-25 23:42:42,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:42:42,848 INFO L225 Difference]: With dead ends: 19626 [2022-11-25 23:42:42,848 INFO L226 Difference]: Without dead ends: 18351 [2022-11-25 23:42:42,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:42:42,857 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 3969 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3969 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:42:42,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3969 Valid, 854 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:42:42,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18351 states. [2022-11-25 23:42:43,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18351 to 5363. [2022-11-25 23:42:43,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5363 states, 5361 states have (on average 1.3670956911024064) internal successors, (7329), 5362 states have internal predecessors, (7329), 0 states have call successors, (0), 0 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 23:42:43,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5363 states to 5363 states and 7329 transitions. [2022-11-25 23:42:43,810 INFO L78 Accepts]: Start accepts. Automaton has 5363 states and 7329 transitions. Word has length 65 [2022-11-25 23:42:43,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:42:43,811 INFO L495 AbstractCegarLoop]: Abstraction has 5363 states and 7329 transitions. [2022-11-25 23:42:43,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:42:43,811 INFO L276 IsEmpty]: Start isEmpty. Operand 5363 states and 7329 transitions. [2022-11-25 23:42:43,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-25 23:42:43,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:43,817 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] [2022-11-25 23:42:43,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 23:42:43,818 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:42:43,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:43,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1311593556, now seen corresponding path program 1 times [2022-11-25 23:42:43,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:42:43,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725057437] [2022-11-25 23:42:43,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:43,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:42:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:43,994 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 23:42:43,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:42:43,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725057437] [2022-11-25 23:42:43,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725057437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:42:43,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:42:43,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:42:43,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478172292] [2022-11-25 23:42:43,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:42:43,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:42:43,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:42:43,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:42:43,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:42:44,000 INFO L87 Difference]: Start difference. First operand 5363 states and 7329 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 23:42:48,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:42:48,140 INFO L93 Difference]: Finished difference Result 19402 states and 26665 transitions. [2022-11-25 23:42:48,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:42:48,141 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-25 23:42:48,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:42:48,189 INFO L225 Difference]: With dead ends: 19402 [2022-11-25 23:42:48,190 INFO L226 Difference]: Without dead ends: 17278 [2022-11-25 23:42:48,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:42:48,198 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 3571 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3571 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:42:48,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3571 Valid, 784 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 23:42:48,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17278 states. [2022-11-25 23:42:49,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17278 to 5391. [2022-11-25 23:42:49,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5391 states, 5389 states have (on average 1.3666728521061422) internal successors, (7365), 5390 states have internal predecessors, (7365), 0 states have call successors, (0), 0 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 23:42:49,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5391 states to 5391 states and 7365 transitions. [2022-11-25 23:42:49,463 INFO L78 Accepts]: Start accepts. Automaton has 5391 states and 7365 transitions. Word has length 66 [2022-11-25 23:42:49,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:42:49,463 INFO L495 AbstractCegarLoop]: Abstraction has 5391 states and 7365 transitions. [2022-11-25 23:42:49,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 23:42:49,464 INFO L276 IsEmpty]: Start isEmpty. Operand 5391 states and 7365 transitions. [2022-11-25 23:42:49,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-25 23:42:49,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:49,469 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] [2022-11-25 23:42:49,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 23:42:49,470 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:42:49,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:49,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1448174587, now seen corresponding path program 1 times [2022-11-25 23:42:49,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:42:49,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445590657] [2022-11-25 23:42:49,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:49,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:42:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:49,636 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 23:42:49,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:42:49,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445590657] [2022-11-25 23:42:49,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445590657] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:42:49,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:42:49,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:42:49,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236669947] [2022-11-25 23:42:49,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:42:49,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:42:49,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:42:49,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:42:49,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:42:49,639 INFO L87 Difference]: Start difference. First operand 5391 states and 7365 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 23:42:52,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:42:52,202 INFO L93 Difference]: Finished difference Result 14126 states and 19386 transitions. [2022-11-25 23:42:52,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:42:52,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-25 23:42:52,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:42:52,225 INFO L225 Difference]: With dead ends: 14126 [2022-11-25 23:42:52,225 INFO L226 Difference]: Without dead ends: 9042 [2022-11-25 23:42:52,233 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 23:42:52,234 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 1815 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1815 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:42:52,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1815 Valid, 393 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:42:52,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9042 states. [2022-11-25 23:42:54,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9042 to 9038. [2022-11-25 23:42:54,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9038 states, 9036 states have (on average 1.3602257636122177) internal successors, (12291), 9037 states have internal predecessors, (12291), 0 states have call successors, (0), 0 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 23:42:54,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9038 states to 9038 states and 12291 transitions. [2022-11-25 23:42:54,116 INFO L78 Accepts]: Start accepts. Automaton has 9038 states and 12291 transitions. Word has length 66 [2022-11-25 23:42:54,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:42:54,117 INFO L495 AbstractCegarLoop]: Abstraction has 9038 states and 12291 transitions. [2022-11-25 23:42:54,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 23:42:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 9038 states and 12291 transitions. [2022-11-25 23:42:54,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-25 23:42:54,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:54,125 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] [2022-11-25 23:42:54,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 23:42:54,125 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:42:54,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:54,126 INFO L85 PathProgramCache]: Analyzing trace with hash 251496623, now seen corresponding path program 1 times [2022-11-25 23:42:54,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:42:54,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777746140] [2022-11-25 23:42:54,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:54,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:42:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:54,332 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 23:42:54,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:42:54,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777746140] [2022-11-25 23:42:54,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777746140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:42:54,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:42:54,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:42:54,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402223807] [2022-11-25 23:42:54,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:42:54,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:42:54,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:42:54,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:42:54,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:42:54,335 INFO L87 Difference]: Start difference. First operand 9038 states and 12291 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:43:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:43:03,746 INFO L93 Difference]: Finished difference Result 43102 states and 59446 transitions. [2022-11-25 23:43:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:43:03,755 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-25 23:43:03,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:43:03,859 INFO L225 Difference]: With dead ends: 43102 [2022-11-25 23:43:03,860 INFO L226 Difference]: Without dead ends: 39380 [2022-11-25 23:43:03,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:43:03,874 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 3534 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3534 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:43:03,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3534 Valid, 845 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:43:03,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39380 states. [2022-11-25 23:43:06,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39380 to 9135. [2022-11-25 23:43:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9135 states, 9133 states have (on average 1.3599036461184715) internal successors, (12420), 9134 states have internal predecessors, (12420), 0 states have call successors, (0), 0 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 23:43:06,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9135 states to 9135 states and 12420 transitions. [2022-11-25 23:43:06,720 INFO L78 Accepts]: Start accepts. Automaton has 9135 states and 12420 transitions. Word has length 67 [2022-11-25 23:43:06,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:43:06,720 INFO L495 AbstractCegarLoop]: Abstraction has 9135 states and 12420 transitions. [2022-11-25 23:43:06,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:43:06,721 INFO L276 IsEmpty]: Start isEmpty. Operand 9135 states and 12420 transitions. [2022-11-25 23:43:06,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-25 23:43:06,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:06,731 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 23:43:06,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 23:43:06,731 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:43:06,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:06,732 INFO L85 PathProgramCache]: Analyzing trace with hash 288337870, now seen corresponding path program 1 times [2022-11-25 23:43:06,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:43:06,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788166766] [2022-11-25 23:43:06,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:06,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:43:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:07,202 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 23:43:07,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:43:07,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788166766] [2022-11-25 23:43:07,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788166766] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:43:07,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:43:07,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:43:07,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950191125] [2022-11-25 23:43:07,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:43:07,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:43:07,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:43:07,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:43:07,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:43:07,206 INFO L87 Difference]: Start difference. First operand 9135 states and 12420 transitions. Second operand has 8 states, 8 states have (on average 8.5) 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 23:43:14,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:43:14,420 INFO L93 Difference]: Finished difference Result 29357 states and 40108 transitions. [2022-11-25 23:43:14,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:43:14,420 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) 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 23:43:14,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:43:14,462 INFO L225 Difference]: With dead ends: 29357 [2022-11-25 23:43:14,462 INFO L226 Difference]: Without dead ends: 22403 [2022-11-25 23:43:14,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-25 23:43:14,479 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 1905 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1905 SdHoareTripleChecker+Valid, 1598 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:43:14,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1905 Valid, 1598 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 23:43:14,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22403 states. [2022-11-25 23:43:16,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22403 to 9131. [2022-11-25 23:43:16,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9131 states, 9129 states have (on average 1.3596231788804907) internal successors, (12412), 9130 states have internal predecessors, (12412), 0 states have call successors, (0), 0 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 23:43:16,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9131 states to 9131 states and 12412 transitions. [2022-11-25 23:43:16,940 INFO L78 Accepts]: Start accepts. Automaton has 9131 states and 12412 transitions. Word has length 68 [2022-11-25 23:43:16,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:43:16,941 INFO L495 AbstractCegarLoop]: Abstraction has 9131 states and 12412 transitions. [2022-11-25 23:43:16,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) 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 23:43:16,941 INFO L276 IsEmpty]: Start isEmpty. Operand 9131 states and 12412 transitions. [2022-11-25 23:43:16,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-25 23:43:16,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:16,948 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 23:43:16,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 23:43:16,948 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:43:16,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:16,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1656089935, now seen corresponding path program 1 times [2022-11-25 23:43:16,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:43:16,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754604366] [2022-11-25 23:43:16,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:16,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:43:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:17,381 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 23:43:17,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:43:17,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754604366] [2022-11-25 23:43:17,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754604366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:43:17,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:43:17,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 23:43:17,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352814293] [2022-11-25 23:43:17,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:43:17,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:43:17,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:43:17,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:43:17,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:43:17,385 INFO L87 Difference]: Start difference. First operand 9131 states and 12412 transitions. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 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 23:43:28,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:43:28,086 INFO L93 Difference]: Finished difference Result 30948 states and 41882 transitions. [2022-11-25 23:43:28,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 23:43:28,087 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 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 23:43:28,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:43:28,129 INFO L225 Difference]: With dead ends: 30948 [2022-11-25 23:43:28,130 INFO L226 Difference]: Without dead ends: 28617 [2022-11-25 23:43:28,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2022-11-25 23:43:28,140 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 1799 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 2075 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1799 SdHoareTripleChecker+Valid, 2149 SdHoareTripleChecker+Invalid, 2083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:43:28,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1799 Valid, 2149 Invalid, 2083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2075 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 23:43:28,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28617 states. [2022-11-25 23:43:30,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28617 to 9131. [2022-11-25 23:43:30,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9131 states, 9129 states have (on average 1.3594040968342644) internal successors, (12410), 9130 states have internal predecessors, (12410), 0 states have call successors, (0), 0 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 23:43:30,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9131 states to 9131 states and 12410 transitions. [2022-11-25 23:43:30,757 INFO L78 Accepts]: Start accepts. Automaton has 9131 states and 12410 transitions. Word has length 68 [2022-11-25 23:43:30,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:43:30,758 INFO L495 AbstractCegarLoop]: Abstraction has 9131 states and 12410 transitions. [2022-11-25 23:43:30,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 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 23:43:30,758 INFO L276 IsEmpty]: Start isEmpty. Operand 9131 states and 12410 transitions. [2022-11-25 23:43:30,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-25 23:43:30,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:30,764 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 23:43:30,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 23:43:30,764 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:43:30,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:30,765 INFO L85 PathProgramCache]: Analyzing trace with hash -583929423, now seen corresponding path program 1 times [2022-11-25 23:43:30,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:43:30,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558623599] [2022-11-25 23:43:30,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:30,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:43:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:31,148 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 23:43:31,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:43:31,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558623599] [2022-11-25 23:43:31,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558623599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:43:31,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:43:31,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:43:31,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550596956] [2022-11-25 23:43:31,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:43:31,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:43:31,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:43:31,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:43:31,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:43:31,152 INFO L87 Difference]: Start difference. First operand 9131 states and 12410 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 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 23:43:39,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:43:39,536 INFO L93 Difference]: Finished difference Result 29459 states and 40259 transitions. [2022-11-25 23:43:39,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:43:39,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 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 23:43:39,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:43:39,579 INFO L225 Difference]: With dead ends: 29459 [2022-11-25 23:43:39,579 INFO L226 Difference]: Without dead ends: 22471 [2022-11-25 23:43:39,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-11-25 23:43:39,593 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 1966 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1966 SdHoareTripleChecker+Valid, 1871 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:43:39,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1966 Valid, 1871 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1581 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 23:43:39,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22471 states. [2022-11-25 23:43:42,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22471 to 9111. [2022-11-25 23:43:42,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9111 states, 9109 states have (on average 1.3588758370842025) internal successors, (12378), 9110 states have internal predecessors, (12378), 0 states have call successors, (0), 0 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 23:43:42,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9111 states to 9111 states and 12378 transitions. [2022-11-25 23:43:42,405 INFO L78 Accepts]: Start accepts. Automaton has 9111 states and 12378 transitions. Word has length 69 [2022-11-25 23:43:42,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:43:42,405 INFO L495 AbstractCegarLoop]: Abstraction has 9111 states and 12378 transitions. [2022-11-25 23:43:42,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 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 23:43:42,406 INFO L276 IsEmpty]: Start isEmpty. Operand 9111 states and 12378 transitions. [2022-11-25 23:43:42,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-25 23:43:42,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:42,412 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 23:43:42,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 23:43:42,412 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:43:42,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:42,413 INFO L85 PathProgramCache]: Analyzing trace with hash -843555950, now seen corresponding path program 1 times [2022-11-25 23:43:42,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:43:42,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841804601] [2022-11-25 23:43:42,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:42,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:43:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:43,318 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 23:43:43,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:43:43,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841804601] [2022-11-25 23:43:43,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841804601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:43:43,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:43:43,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 23:43:43,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419378561] [2022-11-25 23:43:43,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:43:43,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 23:43:43,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:43:43,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 23:43:43,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-25 23:43:43,321 INFO L87 Difference]: Start difference. First operand 9111 states and 12378 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 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 23:44:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:44:16,959 INFO L93 Difference]: Finished difference Result 73299 states and 100511 transitions. [2022-11-25 23:44:16,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-25 23:44:16,960 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 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 23:44:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:44:17,108 INFO L225 Difference]: With dead ends: 73299 [2022-11-25 23:44:17,108 INFO L226 Difference]: Without dead ends: 66147 [2022-11-25 23:44:17,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=429, Invalid=1551, Unknown=0, NotChecked=0, Total=1980 [2022-11-25 23:44:17,131 INFO L413 NwaCegarLoop]: 1089 mSDtfsCounter, 5405 mSDsluCounter, 7037 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5405 SdHoareTripleChecker+Valid, 8126 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:44:17,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5405 Valid, 8126 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1226 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 23:44:17,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66147 states. [2022-11-25 23:44:22,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66147 to 8901. [2022-11-25 23:44:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8901 states, 8899 states have (on average 1.3601528261602427) internal successors, (12104), 8900 states have internal predecessors, (12104), 0 states have call successors, (0), 0 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 23:44:22,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8901 states to 8901 states and 12104 transitions. [2022-11-25 23:44:22,118 INFO L78 Accepts]: Start accepts. Automaton has 8901 states and 12104 transitions. Word has length 69 [2022-11-25 23:44:22,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:44:22,119 INFO L495 AbstractCegarLoop]: Abstraction has 8901 states and 12104 transitions. [2022-11-25 23:44:22,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 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 23:44:22,119 INFO L276 IsEmpty]: Start isEmpty. Operand 8901 states and 12104 transitions. [2022-11-25 23:44:22,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-25 23:44:22,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:44:22,128 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 23:44:22,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 23:44:22,128 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:44:22,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:44:22,129 INFO L85 PathProgramCache]: Analyzing trace with hash -48339803, now seen corresponding path program 1 times [2022-11-25 23:44:22,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:44:22,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462481048] [2022-11-25 23:44:22,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:44:22,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:44:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:44:22,315 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 23:44:22,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:44:22,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462481048] [2022-11-25 23:44:22,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462481048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:44:22,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:44:22,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:44:22,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257709180] [2022-11-25 23:44:22,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:44:22,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:44:22,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:44:22,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:44:22,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:44:22,320 INFO L87 Difference]: Start difference. First operand 8901 states and 12104 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 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 23:44:44,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:44:44,163 INFO L93 Difference]: Finished difference Result 37803 states and 51998 transitions. [2022-11-25 23:44:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:44:44,164 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 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 23:44:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:44:44,219 INFO L225 Difference]: With dead ends: 37803 [2022-11-25 23:44:44,219 INFO L226 Difference]: Without dead ends: 34245 [2022-11-25 23:44:44,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:44:44,229 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 2506 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2506 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:44:44,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2506 Valid, 874 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 23:44:44,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34245 states. [2022-11-25 23:44:50,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34245 to 8972. [2022-11-25 23:44:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8972 states, 8970 states have (on average 1.3604236343366778) internal successors, (12203), 8971 states have internal predecessors, (12203), 0 states have call successors, (0), 0 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 23:44:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8972 states to 8972 states and 12203 transitions. [2022-11-25 23:44:50,102 INFO L78 Accepts]: Start accepts. Automaton has 8972 states and 12203 transitions. Word has length 69 [2022-11-25 23:44:50,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:44:50,102 INFO L495 AbstractCegarLoop]: Abstraction has 8972 states and 12203 transitions. [2022-11-25 23:44:50,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 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 23:44:50,103 INFO L276 IsEmpty]: Start isEmpty. Operand 8972 states and 12203 transitions. [2022-11-25 23:44:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-25 23:44:50,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:44:50,109 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 23:44:50,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 23:44:50,109 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:44:50,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:44:50,110 INFO L85 PathProgramCache]: Analyzing trace with hash 764464694, now seen corresponding path program 1 times [2022-11-25 23:44:50,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:44:50,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697297865] [2022-11-25 23:44:50,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:44:50,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:44:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:44:50,779 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 23:44:50,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:44:50,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697297865] [2022-11-25 23:44:50,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697297865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:44:50,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:44:50,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 23:44:50,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224044081] [2022-11-25 23:44:50,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:44:50,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 23:44:50,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:44:50,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 23:44:50,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:44:50,781 INFO L87 Difference]: Start difference. First operand 8972 states and 12203 transitions. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 10 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 23:45:13,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:45:13,626 INFO L93 Difference]: Finished difference Result 41229 states and 56768 transitions. [2022-11-25 23:45:13,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 23:45:13,627 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 10 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 23:45:13,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:45:13,685 INFO L225 Difference]: With dead ends: 41229 [2022-11-25 23:45:13,686 INFO L226 Difference]: Without dead ends: 34151 [2022-11-25 23:45:13,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-11-25 23:45:13,701 INFO L413 NwaCegarLoop]: 752 mSDtfsCounter, 1925 mSDsluCounter, 3093 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1925 SdHoareTripleChecker+Valid, 3845 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:45:13,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1925 Valid, 3845 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 23:45:13,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34151 states. [2022-11-25 23:45:19,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34151 to 8832. [2022-11-25 23:45:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8832 states, 8830 states have (on average 1.3613816534541336) internal successors, (12021), 8831 states have internal predecessors, (12021), 0 states have call successors, (0), 0 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 23:45:19,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8832 states to 8832 states and 12021 transitions. [2022-11-25 23:45:19,056 INFO L78 Accepts]: Start accepts. Automaton has 8832 states and 12021 transitions. Word has length 69 [2022-11-25 23:45:19,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:45:19,056 INFO L495 AbstractCegarLoop]: Abstraction has 8832 states and 12021 transitions. [2022-11-25 23:45:19,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 10 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 23:45:19,056 INFO L276 IsEmpty]: Start isEmpty. Operand 8832 states and 12021 transitions. [2022-11-25 23:45:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-25 23:45:19,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:45:19,060 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 23:45:19,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 23:45:19,060 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:45:19,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:45:19,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1937241439, now seen corresponding path program 1 times [2022-11-25 23:45:19,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:45:19,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294129094] [2022-11-25 23:45:19,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:19,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:45:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:19,694 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 23:45:19,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:45:19,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294129094] [2022-11-25 23:45:19,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294129094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:45:19,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:45:19,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 23:45:19,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964095169] [2022-11-25 23:45:19,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:45:19,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:45:19,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:45:19,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:45:19,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:45:19,696 INFO L87 Difference]: Start difference. First operand 8832 states and 12021 transitions. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 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 23:45:55,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:45:55,204 INFO L93 Difference]: Finished difference Result 48036 states and 65946 transitions. [2022-11-25 23:45:55,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 23:45:55,204 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 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 23:45:55,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:45:55,277 INFO L225 Difference]: With dead ends: 48036 [2022-11-25 23:45:55,277 INFO L226 Difference]: Without dead ends: 44385 [2022-11-25 23:45:55,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=308, Invalid=748, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 23:45:55,291 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 3582 mSDsluCounter, 3393 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3582 SdHoareTripleChecker+Valid, 4013 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:45:55,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3582 Valid, 4013 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 23:45:55,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44385 states. [2022-11-25 23:46:01,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44385 to 8817. [2022-11-25 23:46:01,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8817 states, 8815 states have (on average 1.3612024957458877) internal successors, (11999), 8816 states have internal predecessors, (11999), 0 states have call successors, (0), 0 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 23:46:01,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8817 states to 8817 states and 11999 transitions. [2022-11-25 23:46:01,759 INFO L78 Accepts]: Start accepts. Automaton has 8817 states and 11999 transitions. Word has length 70 [2022-11-25 23:46:01,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:46:01,759 INFO L495 AbstractCegarLoop]: Abstraction has 8817 states and 11999 transitions. [2022-11-25 23:46:01,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 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 23:46:01,760 INFO L276 IsEmpty]: Start isEmpty. Operand 8817 states and 11999 transitions. [2022-11-25 23:46:01,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-25 23:46:01,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:01,764 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 23:46:01,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 23:46:01,764 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:46:01,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:01,765 INFO L85 PathProgramCache]: Analyzing trace with hash -615241948, now seen corresponding path program 1 times [2022-11-25 23:46:01,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:46:01,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590172016] [2022-11-25 23:46:01,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:01,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:46:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:01,919 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 23:46:01,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:46:01,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590172016] [2022-11-25 23:46:01,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590172016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:46:01,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:46:01,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:46:01,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440381718] [2022-11-25 23:46:01,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:46:01,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:46:01,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:46:01,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:46:01,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:46:01,922 INFO L87 Difference]: Start difference. First operand 8817 states and 11999 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 6 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 23:46:36,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:46:36,204 INFO L93 Difference]: Finished difference Result 42503 states and 58685 transitions. [2022-11-25 23:46:36,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:46:36,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 6 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 23:46:36,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:46:36,292 INFO L225 Difference]: With dead ends: 42503 [2022-11-25 23:46:36,292 INFO L226 Difference]: Without dead ends: 38899 [2022-11-25 23:46:36,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:46:36,307 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 2608 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2608 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:46:36,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2608 Valid, 867 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 23:46:36,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38899 states. [2022-11-25 23:46:42,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38899 to 8847. [2022-11-25 23:46:42,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8847 states, 8845 states have (on average 1.3611079706048614) internal successors, (12039), 8846 states have internal predecessors, (12039), 0 states have call successors, (0), 0 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 23:46:42,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8847 states to 8847 states and 12039 transitions. [2022-11-25 23:46:42,909 INFO L78 Accepts]: Start accepts. Automaton has 8847 states and 12039 transitions. Word has length 70 [2022-11-25 23:46:42,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:46:42,909 INFO L495 AbstractCegarLoop]: Abstraction has 8847 states and 12039 transitions. [2022-11-25 23:46:42,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 6 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 23:46:42,910 INFO L276 IsEmpty]: Start isEmpty. Operand 8847 states and 12039 transitions. [2022-11-25 23:46:42,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-25 23:46:42,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:42,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:46:42,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 23:46:42,915 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:46:42,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:42,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2007440010, now seen corresponding path program 1 times [2022-11-25 23:46:42,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:46:42,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392734149] [2022-11-25 23:46:42,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:42,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:46:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:43,219 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 23:46:43,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:46:43,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392734149] [2022-11-25 23:46:43,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392734149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:46:43,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:46:43,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 23:46:43,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511241333] [2022-11-25 23:46:43,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:46:43,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:46:43,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:46:43,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:46:43,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:46:43,222 INFO L87 Difference]: Start difference. First operand 8847 states and 12039 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 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 23:47:09,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:09,863 INFO L93 Difference]: Finished difference Result 35088 states and 48025 transitions. [2022-11-25 23:47:09,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 23:47:09,863 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 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 23:47:09,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:09,907 INFO L225 Difference]: With dead ends: 35088 [2022-11-25 23:47:09,907 INFO L226 Difference]: Without dead ends: 27896 [2022-11-25 23:47:09,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:47:09,918 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 2359 mSDsluCounter, 1598 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2359 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:09,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2359 Valid, 2082 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1684 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 23:47:09,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27896 states. [2022-11-25 23:47:17,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27896 to 8710. [2022-11-25 23:47:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8710 states, 8708 states have (on average 1.3610473128158016) internal successors, (11852), 8709 states have internal predecessors, (11852), 0 states have call successors, (0), 0 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 23:47:17,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8710 states to 8710 states and 11852 transitions. [2022-11-25 23:47:17,312 INFO L78 Accepts]: Start accepts. Automaton has 8710 states and 11852 transitions. Word has length 70 [2022-11-25 23:47:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:47:17,312 INFO L495 AbstractCegarLoop]: Abstraction has 8710 states and 11852 transitions. [2022-11-25 23:47:17,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 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 23:47:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand 8710 states and 11852 transitions. [2022-11-25 23:47:17,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-25 23:47:17,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:17,316 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] [2022-11-25 23:47:17,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-25 23:47:17,317 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:47:17,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:17,317 INFO L85 PathProgramCache]: Analyzing trace with hash 336623009, now seen corresponding path program 1 times [2022-11-25 23:47:17,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:47:17,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074062207] [2022-11-25 23:47:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:17,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:47:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:17,374 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 23:47:17,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:47:17,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074062207] [2022-11-25 23:47:17,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074062207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:47:17,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:47:17,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:47:17,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881566771] [2022-11-25 23:47:17,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:47:17,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:47:17,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:47:17,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:47:17,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:47:17,377 INFO L87 Difference]: Start difference. First operand 8710 states and 11852 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:27,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:27,990 INFO L93 Difference]: Finished difference Result 16080 states and 21923 transitions. [2022-11-25 23:47:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:47:27,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-25 23:47:27,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:28,005 INFO L225 Difference]: With dead ends: 16080 [2022-11-25 23:47:28,005 INFO L226 Difference]: Without dead ends: 11835 [2022-11-25 23:47:28,010 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 23:47:28,011 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 407 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:28,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 506 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:47:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11835 states. [2022-11-25 23:47:38,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11835 to 11831. [2022-11-25 23:47:38,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11831 states, 11829 states have (on average 1.3626680192746639) internal successors, (16119), 11830 states have internal predecessors, (16119), 0 states have call successors, (0), 0 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 23:47:38,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11831 states to 11831 states and 16119 transitions. [2022-11-25 23:47:38,242 INFO L78 Accepts]: Start accepts. Automaton has 11831 states and 16119 transitions. Word has length 71 [2022-11-25 23:47:38,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:47:38,243 INFO L495 AbstractCegarLoop]: Abstraction has 11831 states and 16119 transitions. [2022-11-25 23:47:38,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:38,243 INFO L276 IsEmpty]: Start isEmpty. Operand 11831 states and 16119 transitions. [2022-11-25 23:47:38,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-25 23:47:38,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:38,250 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] [2022-11-25 23:47:38,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-25 23:47:38,250 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:47:38,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:38,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1421898609, now seen corresponding path program 1 times [2022-11-25 23:47:38,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:47:38,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965635782] [2022-11-25 23:47:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:38,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:47:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:38,322 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 23:47:38,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:47:38,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965635782] [2022-11-25 23:47:38,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965635782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:47:38,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:47:38,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:47:38,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895110561] [2022-11-25 23:47:38,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:47:38,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:47:38,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:47:38,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:47:38,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:47:38,325 INFO L87 Difference]: Start difference. First operand 11831 states and 16119 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:49,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:49,577 INFO L93 Difference]: Finished difference Result 17268 states and 23565 transitions. [2022-11-25 23:47:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:47:49,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-25 23:47:49,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:49,594 INFO L225 Difference]: With dead ends: 17268 [2022-11-25 23:47:49,594 INFO L226 Difference]: Without dead ends: 11835 [2022-11-25 23:47:49,599 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 23:47:49,600 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 231 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:49,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 927 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:47:49,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11835 states. [2022-11-25 23:48:00,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11835 to 11831. [2022-11-25 23:48:00,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11831 states, 11829 states have (on average 1.3484656353030686) internal successors, (15951), 11830 states have internal predecessors, (15951), 0 states have call successors, (0), 0 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 23:48:00,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11831 states to 11831 states and 15951 transitions. [2022-11-25 23:48:00,202 INFO L78 Accepts]: Start accepts. Automaton has 11831 states and 15951 transitions. Word has length 71 [2022-11-25 23:48:00,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:00,203 INFO L495 AbstractCegarLoop]: Abstraction has 11831 states and 15951 transitions. [2022-11-25 23:48:00,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:00,203 INFO L276 IsEmpty]: Start isEmpty. Operand 11831 states and 15951 transitions. [2022-11-25 23:48:00,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-25 23:48:00,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:00,208 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] [2022-11-25 23:48:00,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-25 23:48:00,208 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:48:00,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:00,208 INFO L85 PathProgramCache]: Analyzing trace with hash 843863188, now seen corresponding path program 1 times [2022-11-25 23:48:00,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:00,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148557173] [2022-11-25 23:48:00,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:00,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:00,520 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 23:48:00,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:00,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148557173] [2022-11-25 23:48:00,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148557173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:00,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:00,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:48:00,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237319850] [2022-11-25 23:48:00,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:00,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:48:00,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:00,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:48:00,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:48:00,524 INFO L87 Difference]: Start difference. First operand 11831 states and 15951 transitions. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:20,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:20,424 INFO L93 Difference]: Finished difference Result 23709 states and 31821 transitions. [2022-11-25 23:48:20,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:48:20,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-25 23:48:20,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:20,455 INFO L225 Difference]: With dead ends: 23709 [2022-11-25 23:48:20,455 INFO L226 Difference]: Without dead ends: 20379 [2022-11-25 23:48:20,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-25 23:48:20,462 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 1563 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1563 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:20,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1563 Valid, 1403 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:48:20,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20379 states. [2022-11-25 23:48:30,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20379 to 11831. [2022-11-25 23:48:30,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11831 states, 11829 states have (on average 1.3483810973032377) internal successors, (15950), 11830 states have internal predecessors, (15950), 0 states have call successors, (0), 0 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 23:48:30,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11831 states to 11831 states and 15950 transitions. [2022-11-25 23:48:30,673 INFO L78 Accepts]: Start accepts. Automaton has 11831 states and 15950 transitions. Word has length 71 [2022-11-25 23:48:30,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:30,674 INFO L495 AbstractCegarLoop]: Abstraction has 11831 states and 15950 transitions. [2022-11-25 23:48:30,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:30,674 INFO L276 IsEmpty]: Start isEmpty. Operand 11831 states and 15950 transitions. [2022-11-25 23:48:30,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-25 23:48:30,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:30,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:30,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-25 23:48:30,681 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:48:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:30,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1894019455, now seen corresponding path program 1 times [2022-11-25 23:48:30,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:30,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804364436] [2022-11-25 23:48:30,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:30,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:31,322 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 23:48:31,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:31,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804364436] [2022-11-25 23:48:31,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804364436] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:31,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:31,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 23:48:31,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797840743] [2022-11-25 23:48:31,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:31,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:48:31,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:31,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:48:31,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:48:31,324 INFO L87 Difference]: Start difference. First operand 11831 states and 15950 transitions. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:49,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:49,945 INFO L93 Difference]: Finished difference Result 21284 states and 28701 transitions. [2022-11-25 23:48:49,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:48:49,946 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-25 23:48:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:49,969 INFO L225 Difference]: With dead ends: 21284 [2022-11-25 23:48:49,969 INFO L226 Difference]: Without dead ends: 18695 [2022-11-25 23:48:49,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2022-11-25 23:48:49,974 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 2497 mSDsluCounter, 2430 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2497 SdHoareTripleChecker+Valid, 3010 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:49,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2497 Valid, 3010 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 23:48:49,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18695 states. [2022-11-25 23:48:59,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18695 to 11822. [2022-11-25 23:48:59,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11822 states, 11820 states have (on average 1.3484771573604062) internal successors, (15939), 11821 states have internal predecessors, (15939), 0 states have call successors, (0), 0 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 23:48:59,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11822 states to 11822 states and 15939 transitions. [2022-11-25 23:48:59,809 INFO L78 Accepts]: Start accepts. Automaton has 11822 states and 15939 transitions. Word has length 71 [2022-11-25 23:48:59,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:59,809 INFO L495 AbstractCegarLoop]: Abstraction has 11822 states and 15939 transitions. [2022-11-25 23:48:59,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:59,809 INFO L276 IsEmpty]: Start isEmpty. Operand 11822 states and 15939 transitions. [2022-11-25 23:48:59,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-25 23:48:59,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:59,814 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] [2022-11-25 23:48:59,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-25 23:48:59,814 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:48:59,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:59,815 INFO L85 PathProgramCache]: Analyzing trace with hash -764275833, now seen corresponding path program 1 times [2022-11-25 23:48:59,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:59,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609482833] [2022-11-25 23:48:59,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:59,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:59,970 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 23:48:59,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:59,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609482833] [2022-11-25 23:48:59,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609482833] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:59,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:59,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:48:59,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724934359] [2022-11-25 23:48:59,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:59,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:48:59,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:59,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:48:59,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:48:59,973 INFO L87 Difference]: Start difference. First operand 11822 states and 15939 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:49:09,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:49:09,853 INFO L93 Difference]: Finished difference Result 16222 states and 21900 transitions. [2022-11-25 23:49:09,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:49:09,854 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-25 23:49:09,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:49:09,867 INFO L225 Difference]: With dead ends: 16222 [2022-11-25 23:49:09,867 INFO L226 Difference]: Without dead ends: 10933 [2022-11-25 23:49:09,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:49:09,874 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 750 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:49:09,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 1125 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:49:09,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10933 states. [2022-11-25 23:49:17,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10933 to 8895. [2022-11-25 23:49:17,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8895 states, 8893 states have (on average 1.3356572585179354) internal successors, (11878), 8894 states have internal predecessors, (11878), 0 states have call successors, (0), 0 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 23:49:17,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8895 states to 8895 states and 11878 transitions. [2022-11-25 23:49:17,553 INFO L78 Accepts]: Start accepts. Automaton has 8895 states and 11878 transitions. Word has length 71 [2022-11-25 23:49:17,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:49:17,553 INFO L495 AbstractCegarLoop]: Abstraction has 8895 states and 11878 transitions. [2022-11-25 23:49:17,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:49:17,554 INFO L276 IsEmpty]: Start isEmpty. Operand 8895 states and 11878 transitions. [2022-11-25 23:49:17,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 23:49:17,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:49:17,558 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 23:49:17,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-25 23:49:17,559 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:49:17,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:49:17,559 INFO L85 PathProgramCache]: Analyzing trace with hash 590821425, now seen corresponding path program 1 times [2022-11-25 23:49:17,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:49:17,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114107046] [2022-11-25 23:49:17,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:49:17,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:49:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:49:17,619 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 23:49:17,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:49:17,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114107046] [2022-11-25 23:49:17,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114107046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:49:17,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:49:17,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:49:17,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181159779] [2022-11-25 23:49:17,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:49:17,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:49:17,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:49:17,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:49:17,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:49:17,622 INFO L87 Difference]: Start difference. First operand 8895 states and 11878 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 23:49:24,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:49:24,793 INFO L93 Difference]: Finished difference Result 11951 states and 15970 transitions. [2022-11-25 23:49:24,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:49:24,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 23:49:24,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:49:24,803 INFO L225 Difference]: With dead ends: 11951 [2022-11-25 23:49:24,803 INFO L226 Difference]: Without dead ends: 8286 [2022-11-25 23:49:24,806 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 23:49:24,807 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 274 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:49:24,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 899 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:49:24,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8286 states. [2022-11-25 23:49:31,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8286 to 8284. [2022-11-25 23:49:31,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8284 states, 8282 states have (on average 1.3200917652740884) internal successors, (10933), 8283 states have internal predecessors, (10933), 0 states have call successors, (0), 0 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 23:49:31,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8284 states to 8284 states and 10933 transitions. [2022-11-25 23:49:31,721 INFO L78 Accepts]: Start accepts. Automaton has 8284 states and 10933 transitions. Word has length 72 [2022-11-25 23:49:31,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:49:31,721 INFO L495 AbstractCegarLoop]: Abstraction has 8284 states and 10933 transitions. [2022-11-25 23:49:31,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 23:49:31,722 INFO L276 IsEmpty]: Start isEmpty. Operand 8284 states and 10933 transitions. [2022-11-25 23:49:31,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 23:49:31,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:49:31,726 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 23:49:31,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-25 23:49:31,726 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:49:31,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:49:31,727 INFO L85 PathProgramCache]: Analyzing trace with hash -275978777, now seen corresponding path program 1 times [2022-11-25 23:49:31,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:49:31,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763636415] [2022-11-25 23:49:31,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:49:31,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:49:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:49:31,853 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 23:49:31,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:49:31,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763636415] [2022-11-25 23:49:31,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763636415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:49:31,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:49:31,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:49:31,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099669121] [2022-11-25 23:49:31,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:49:31,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:49:31,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:49:31,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:49:31,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:49:31,856 INFO L87 Difference]: Start difference. First operand 8284 states and 10933 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 23:49:43,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:49:43,979 INFO L93 Difference]: Finished difference Result 17554 states and 23426 transitions. [2022-11-25 23:49:43,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:49:43,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 23:49:43,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:49:43,997 INFO L225 Difference]: With dead ends: 17554 [2022-11-25 23:49:43,997 INFO L226 Difference]: Without dead ends: 13028 [2022-11-25 23:49:44,002 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 23:49:44,003 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 172 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:49:44,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 823 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:49:44,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13028 states. [2022-11-25 23:49:55,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13028 to 12334. [2022-11-25 23:49:55,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12334 states, 12332 states have (on average 1.3154395069737268) internal successors, (16222), 12333 states have internal predecessors, (16222), 0 states have call successors, (0), 0 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 23:49:55,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12334 states to 12334 states and 16222 transitions. [2022-11-25 23:49:55,336 INFO L78 Accepts]: Start accepts. Automaton has 12334 states and 16222 transitions. Word has length 72 [2022-11-25 23:49:55,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:49:55,336 INFO L495 AbstractCegarLoop]: Abstraction has 12334 states and 16222 transitions. [2022-11-25 23:49:55,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 23:49:55,337 INFO L276 IsEmpty]: Start isEmpty. Operand 12334 states and 16222 transitions. [2022-11-25 23:49:55,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 23:49:55,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:49:55,339 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 23:49:55,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-25 23:49:55,340 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:49:55,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:49:55,340 INFO L85 PathProgramCache]: Analyzing trace with hash 5740306, now seen corresponding path program 1 times [2022-11-25 23:49:55,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:49:55,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921743635] [2022-11-25 23:49:55,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:49:55,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:49:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:49:55,398 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 23:49:55,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:49:55,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921743635] [2022-11-25 23:49:55,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921743635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:49:55,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:49:55,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:49:55,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290858451] [2022-11-25 23:49:55,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:49:55,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:49:55,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:49:55,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:49:55,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:49:55,401 INFO L87 Difference]: Start difference. First operand 12334 states and 16222 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 23:50:08,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:50:08,673 INFO L93 Difference]: Finished difference Result 20969 states and 27611 transitions. [2022-11-25 23:50:08,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:50:08,674 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 23:50:08,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:50:08,691 INFO L225 Difference]: With dead ends: 20969 [2022-11-25 23:50:08,691 INFO L226 Difference]: Without dead ends: 14691 [2022-11-25 23:50:08,699 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 23:50:08,699 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 332 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:50:08,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 511 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:50:08,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14691 states. [2022-11-25 23:50:19,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14691 to 11836. [2022-11-25 23:50:19,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11836 states, 11834 states have (on average 1.3116444143991888) internal successors, (15522), 11835 states have internal predecessors, (15522), 0 states have call successors, (0), 0 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 23:50:19,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11836 states to 11836 states and 15522 transitions. [2022-11-25 23:50:19,998 INFO L78 Accepts]: Start accepts. Automaton has 11836 states and 15522 transitions. Word has length 73 [2022-11-25 23:50:19,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:50:19,999 INFO L495 AbstractCegarLoop]: Abstraction has 11836 states and 15522 transitions. [2022-11-25 23:50:19,999 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 23:50:19,999 INFO L276 IsEmpty]: Start isEmpty. Operand 11836 states and 15522 transitions. [2022-11-25 23:50:20,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 23:50:20,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:20,002 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 23:50:20,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-25 23:50:20,002 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:50:20,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:20,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1280406820, now seen corresponding path program 1 times [2022-11-25 23:50:20,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:50:20,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463686653] [2022-11-25 23:50:20,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:20,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:50:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:20,280 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 23:50:20,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:50:20,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463686653] [2022-11-25 23:50:20,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463686653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:50:20,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:50:20,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:50:20,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007863173] [2022-11-25 23:50:20,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:50:20,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:50:20,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:50:20,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:50:20,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:50:20,283 INFO L87 Difference]: Start difference. First operand 11836 states and 15522 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 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 23:50:39,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:50:39,485 INFO L93 Difference]: Finished difference Result 18552 states and 24079 transitions. [2022-11-25 23:50:39,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:50:39,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 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 23:50:39,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:50:39,509 INFO L225 Difference]: With dead ends: 18552 [2022-11-25 23:50:39,509 INFO L226 Difference]: Without dead ends: 17231 [2022-11-25 23:50:39,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:50:39,514 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 983 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:50:39,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 1139 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:50:39,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17231 states. [2022-11-25 23:50:51,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17231 to 11836. [2022-11-25 23:50:51,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11836 states, 11834 states have (on average 1.3115599121176271) internal successors, (15521), 11835 states have internal predecessors, (15521), 0 states have call successors, (0), 0 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 23:50:51,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11836 states to 11836 states and 15521 transitions. [2022-11-25 23:50:51,667 INFO L78 Accepts]: Start accepts. Automaton has 11836 states and 15521 transitions. Word has length 73 [2022-11-25 23:50:51,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:50:51,668 INFO L495 AbstractCegarLoop]: Abstraction has 11836 states and 15521 transitions. [2022-11-25 23:50:51,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 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 23:50:51,668 INFO L276 IsEmpty]: Start isEmpty. Operand 11836 states and 15521 transitions. [2022-11-25 23:50:51,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 23:50:51,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:51,670 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 23:50:51,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-25 23:50:51,670 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:50:51,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:51,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1783622201, now seen corresponding path program 1 times [2022-11-25 23:50:51,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:50:51,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615893457] [2022-11-25 23:50:51,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:51,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:50:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:52,492 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 23:50:52,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:50:52,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615893457] [2022-11-25 23:50:52,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615893457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:50:52,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:50:52,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 23:50:52,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157442730] [2022-11-25 23:50:52,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:50:52,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 23:50:52,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:50:52,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 23:50:52,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-25 23:50:52,495 INFO L87 Difference]: Start difference. First operand 11836 states and 15521 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 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 23:51:40,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:40,908 INFO L93 Difference]: Finished difference Result 40586 states and 53130 transitions. [2022-11-25 23:51:40,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-25 23:51:40,909 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 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 23:51:40,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:40,988 INFO L225 Difference]: With dead ends: 40586 [2022-11-25 23:51:40,989 INFO L226 Difference]: Without dead ends: 39242 [2022-11-25 23:51:41,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=297, Invalid=1035, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 23:51:41,002 INFO L413 NwaCegarLoop]: 685 mSDtfsCounter, 3645 mSDsluCounter, 3936 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3645 SdHoareTripleChecker+Valid, 4621 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:41,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3645 Valid, 4621 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 23:51:41,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39242 states. [2022-11-25 23:51:53,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39242 to 11810. [2022-11-25 23:51:53,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11810 states, 11809 states have (on average 1.3116267253789482) internal successors, (15489), 11809 states have internal predecessors, (15489), 0 states have call successors, (0), 0 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 23:51:53,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11810 states to 11810 states and 15489 transitions. [2022-11-25 23:51:53,066 INFO L78 Accepts]: Start accepts. Automaton has 11810 states and 15489 transitions. Word has length 73 [2022-11-25 23:51:53,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:53,066 INFO L495 AbstractCegarLoop]: Abstraction has 11810 states and 15489 transitions. [2022-11-25 23:51:53,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 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 23:51:53,066 INFO L276 IsEmpty]: Start isEmpty. Operand 11810 states and 15489 transitions. [2022-11-25 23:51:53,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 23:51:53,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:53,069 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 23:51:53,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-25 23:51:53,069 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:51:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:53,070 INFO L85 PathProgramCache]: Analyzing trace with hash 79843687, now seen corresponding path program 1 times [2022-11-25 23:51:53,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:53,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216820501] [2022-11-25 23:51:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:53,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:53,237 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 23:51:53,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:53,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216820501] [2022-11-25 23:51:53,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216820501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:51:53,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:51:53,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:51:53,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385547717] [2022-11-25 23:51:53,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:51:53,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:51:53,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:53,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:51:53,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:51:53,244 INFO L87 Difference]: Start difference. First operand 11810 states and 15489 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 23:52:08,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:08,227 INFO L93 Difference]: Finished difference Result 20156 states and 26461 transitions. [2022-11-25 23:52:08,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:52:08,227 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 23:52:08,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:08,256 INFO L225 Difference]: With dead ends: 20156 [2022-11-25 23:52:08,256 INFO L226 Difference]: Without dead ends: 14099 [2022-11-25 23:52:08,263 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 23:52:08,264 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 305 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:08,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 548 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:52:08,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14099 states. [2022-11-25 23:52:19,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14099 to 11296. [2022-11-25 23:52:19,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11296 states, 11295 states have (on average 1.3071270473660912) internal successors, (14764), 11295 states have internal predecessors, (14764), 0 states have call successors, (0), 0 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 23:52:19,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11296 states to 11296 states and 14764 transitions. [2022-11-25 23:52:19,720 INFO L78 Accepts]: Start accepts. Automaton has 11296 states and 14764 transitions. Word has length 73 [2022-11-25 23:52:19,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:19,721 INFO L495 AbstractCegarLoop]: Abstraction has 11296 states and 14764 transitions. [2022-11-25 23:52:19,721 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 23:52:19,721 INFO L276 IsEmpty]: Start isEmpty. Operand 11296 states and 14764 transitions. [2022-11-25 23:52:19,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 23:52:19,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:19,723 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 23:52:19,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-25 23:52:19,724 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:52:19,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:19,724 INFO L85 PathProgramCache]: Analyzing trace with hash -535922221, now seen corresponding path program 1 times [2022-11-25 23:52:19,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:52:19,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964206816] [2022-11-25 23:52:19,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:19,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:52:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:19,988 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 23:52:19,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:52:19,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964206816] [2022-11-25 23:52:19,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964206816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:19,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:19,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:52:19,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730616989] [2022-11-25 23:52:19,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:19,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:52:19,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:52:19,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:52:19,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:52:19,991 INFO L87 Difference]: Start difference. First operand 11296 states and 14764 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 7 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 23:52:36,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:36,813 INFO L93 Difference]: Finished difference Result 15807 states and 20477 transitions. [2022-11-25 23:52:36,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:52:36,814 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 7 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 23:52:36,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:36,831 INFO L225 Difference]: With dead ends: 15807 [2022-11-25 23:52:36,832 INFO L226 Difference]: Without dead ends: 14487 [2022-11-25 23:52:36,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2022-11-25 23:52:36,836 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 1359 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1359 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:36,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1359 Valid, 1004 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:52:36,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14487 states. [2022-11-25 23:52:47,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14487 to 11296. [2022-11-25 23:52:47,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11296 states, 11295 states have (on average 1.3070385126162019) internal successors, (14763), 11295 states have internal predecessors, (14763), 0 states have call successors, (0), 0 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 23:52:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11296 states to 11296 states and 14763 transitions. [2022-11-25 23:52:47,932 INFO L78 Accepts]: Start accepts. Automaton has 11296 states and 14763 transitions. Word has length 74 [2022-11-25 23:52:47,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:47,933 INFO L495 AbstractCegarLoop]: Abstraction has 11296 states and 14763 transitions. [2022-11-25 23:52:47,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 7 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 23:52:47,933 INFO L276 IsEmpty]: Start isEmpty. Operand 11296 states and 14763 transitions. [2022-11-25 23:52:47,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 23:52:47,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:47,935 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 23:52:47,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-25 23:52:47,935 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:52:47,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:47,936 INFO L85 PathProgramCache]: Analyzing trace with hash 2086759737, now seen corresponding path program 1 times [2022-11-25 23:52:47,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:52:47,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699684687] [2022-11-25 23:52:47,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:47,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:52:47,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:48,142 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 23:52:48,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:52:48,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699684687] [2022-11-25 23:52:48,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699684687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:48,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:48,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:52:48,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698420281] [2022-11-25 23:52:48,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:48,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:52:48,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:52:48,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:52:48,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:52:48,145 INFO L87 Difference]: Start difference. First operand 11296 states and 14763 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 7 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 23:53:07,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:53:07,335 INFO L93 Difference]: Finished difference Result 19247 states and 24931 transitions. [2022-11-25 23:53:07,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:53:07,335 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 7 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 23:53:07,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:53:07,444 INFO L225 Difference]: With dead ends: 19247 [2022-11-25 23:53:07,444 INFO L226 Difference]: Without dead ends: 17917 [2022-11-25 23:53:07,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:53:07,449 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 947 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:53:07,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [947 Valid, 1194 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 23:53:07,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17917 states. [2022-11-25 23:53:18,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17917 to 11296. [2022-11-25 23:53:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11296 states, 11295 states have (on average 1.3069499778663125) internal successors, (14762), 11295 states have internal predecessors, (14762), 0 states have call successors, (0), 0 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 23:53:18,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11296 states to 11296 states and 14762 transitions. [2022-11-25 23:53:18,518 INFO L78 Accepts]: Start accepts. Automaton has 11296 states and 14762 transitions. Word has length 74 [2022-11-25 23:53:18,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:53:18,518 INFO L495 AbstractCegarLoop]: Abstraction has 11296 states and 14762 transitions. [2022-11-25 23:53:18,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 7 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 23:53:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand 11296 states and 14762 transitions. [2022-11-25 23:53:18,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 23:53:18,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:53:18,521 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 23:53:18,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-25 23:53:18,521 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:53:18,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:53:18,521 INFO L85 PathProgramCache]: Analyzing trace with hash -288744500, now seen corresponding path program 1 times [2022-11-25 23:53:18,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:53:18,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314715910] [2022-11-25 23:53:18,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:53:18,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:53:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:18,619 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 23:53:18,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:53:18,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314715910] [2022-11-25 23:53:18,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314715910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:53:18,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:53:18,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:53:18,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842265580] [2022-11-25 23:53:18,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:53:18,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:53:18,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:53:18,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:53:18,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:53:18,622 INFO L87 Difference]: Start difference. First operand 11296 states and 14762 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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 23:53:35,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:53:35,082 INFO L93 Difference]: Finished difference Result 24480 states and 32296 transitions. [2022-11-25 23:53:35,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:53:35,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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 23:53:35,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:53:35,104 INFO L225 Difference]: With dead ends: 24480 [2022-11-25 23:53:35,104 INFO L226 Difference]: Without dead ends: 16838 [2022-11-25 23:53:35,113 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 23:53:35,114 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 125 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:53:35,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 646 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:53:35,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16838 states. [2022-11-25 23:53:51,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16838 to 15510. [2022-11-25 23:53:51,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15510 states, 15509 states have (on average 1.3007286091946613) internal successors, (20173), 15509 states have internal predecessors, (20173), 0 states have call successors, (0), 0 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 23:53:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15510 states to 15510 states and 20173 transitions. [2022-11-25 23:53:51,384 INFO L78 Accepts]: Start accepts. Automaton has 15510 states and 20173 transitions. Word has length 74 [2022-11-25 23:53:51,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:53:51,384 INFO L495 AbstractCegarLoop]: Abstraction has 15510 states and 20173 transitions. [2022-11-25 23:53:51,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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 23:53:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 15510 states and 20173 transitions. [2022-11-25 23:53:51,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-25 23:53:51,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:53:51,387 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:53:51,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-25 23:53:51,387 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:53:51,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:53:51,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1035215938, now seen corresponding path program 1 times [2022-11-25 23:53:51,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:53:51,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36287865] [2022-11-25 23:53:51,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:53:51,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:53:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:51,949 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 23:53:51,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:53:51,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36287865] [2022-11-25 23:53:51,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36287865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:53:51,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:53:51,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 23:53:51,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240584237] [2022-11-25 23:53:51,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:53:51,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:53:51,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:53:51,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:53:51,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:53:51,951 INFO L87 Difference]: Start difference. First operand 15510 states and 20173 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 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 23:54:22,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:22,802 INFO L93 Difference]: Finished difference Result 27681 states and 35914 transitions. [2022-11-25 23:54:22,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:54:22,810 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 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 23:54:22,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:22,847 INFO L225 Difference]: With dead ends: 27681 [2022-11-25 23:54:22,847 INFO L226 Difference]: Without dead ends: 25807 [2022-11-25 23:54:22,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:54:22,855 INFO L413 NwaCegarLoop]: 541 mSDtfsCounter, 1881 mSDsluCounter, 2575 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1881 SdHoareTripleChecker+Valid, 3116 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:22,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1881 Valid, 3116 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:54:22,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25807 states. [2022-11-25 23:54:44,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25807 to 15501. [2022-11-25 23:54:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15501 states, 15500 states have (on average 1.300709677419355) internal successors, (20161), 15500 states have internal predecessors, (20161), 0 states have call successors, (0), 0 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 23:54:45,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15501 states to 15501 states and 20161 transitions. [2022-11-25 23:54:45,014 INFO L78 Accepts]: Start accepts. Automaton has 15501 states and 20161 transitions. Word has length 76 [2022-11-25 23:54:45,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:45,015 INFO L495 AbstractCegarLoop]: Abstraction has 15501 states and 20161 transitions. [2022-11-25 23:54:45,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 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 23:54:45,015 INFO L276 IsEmpty]: Start isEmpty. Operand 15501 states and 20161 transitions. [2022-11-25 23:54:45,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-25 23:54:45,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:45,018 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] [2022-11-25 23:54:45,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-25 23:54:45,018 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:54:45,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:45,019 INFO L85 PathProgramCache]: Analyzing trace with hash -593833995, now seen corresponding path program 1 times [2022-11-25 23:54:45,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:54:45,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239937298] [2022-11-25 23:54:45,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:45,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:54:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:45,617 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 23:54:45,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:54:45,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239937298] [2022-11-25 23:54:45,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239937298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:54:45,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:54:45,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 23:54:45,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276243073] [2022-11-25 23:54:45,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:54:45,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:54:45,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:54:45,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:54:45,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:54:45,619 INFO L87 Difference]: Start difference. First operand 15501 states and 20161 transitions. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 11 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 23:55:21,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:21,461 INFO L93 Difference]: Finished difference Result 28387 states and 36731 transitions. [2022-11-25 23:55:21,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:55:21,461 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 11 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-25 23:55:21,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:21,495 INFO L225 Difference]: With dead ends: 28387 [2022-11-25 23:55:21,496 INFO L226 Difference]: Without dead ends: 26497 [2022-11-25 23:55:21,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:55:21,502 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 2128 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2128 SdHoareTripleChecker+Valid, 2195 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:21,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2128 Valid, 2195 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:55:21,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26497 states. [2022-11-25 23:55:40,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26497 to 15474. [2022-11-25 23:55:40,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15474 states, 15473 states have (on average 1.3007820073676728) internal successors, (20127), 15473 states have internal predecessors, (20127), 0 states have call successors, (0), 0 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 23:55:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15474 states to 15474 states and 20127 transitions. [2022-11-25 23:55:40,494 INFO L78 Accepts]: Start accepts. Automaton has 15474 states and 20127 transitions. Word has length 77 [2022-11-25 23:55:40,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:40,494 INFO L495 AbstractCegarLoop]: Abstraction has 15474 states and 20127 transitions. [2022-11-25 23:55:40,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 11 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 23:55:40,495 INFO L276 IsEmpty]: Start isEmpty. Operand 15474 states and 20127 transitions. [2022-11-25 23:55:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-25 23:55:40,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:40,497 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] [2022-11-25 23:55:40,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-25 23:55:40,497 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:55:40,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:40,498 INFO L85 PathProgramCache]: Analyzing trace with hash 276092804, now seen corresponding path program 1 times [2022-11-25 23:55:40,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:55:40,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904517124] [2022-11-25 23:55:40,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:40,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:55:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:40,589 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 23:55:40,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:55:40,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904517124] [2022-11-25 23:55:40,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904517124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:55:40,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:55:40,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:55:40,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867993276] [2022-11-25 23:55:40,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:55:40,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:55:40,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:55:40,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:55:40,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:55:40,592 INFO L87 Difference]: Start difference. First operand 15474 states and 20127 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 23:56:08,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:08,877 INFO L93 Difference]: Finished difference Result 33854 states and 44439 transitions. [2022-11-25 23:56:08,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:56:08,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-25 23:56:08,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:08,907 INFO L225 Difference]: With dead ends: 33854 [2022-11-25 23:56:08,907 INFO L226 Difference]: Without dead ends: 23282 [2022-11-25 23:56:08,915 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 23:56:08,915 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 89 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:08,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 612 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:56:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23282 states. [2022-11-25 23:56:36,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23282 to 21283. [2022-11-25 23:56:36,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21283 states, 21282 states have (on average 1.2943332393572033) internal successors, (27546), 21282 states have internal predecessors, (27546), 0 states have call successors, (0), 0 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 23:56:36,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21283 states to 21283 states and 27546 transitions. [2022-11-25 23:56:36,042 INFO L78 Accepts]: Start accepts. Automaton has 21283 states and 27546 transitions. Word has length 77 [2022-11-25 23:56:36,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:36,043 INFO L495 AbstractCegarLoop]: Abstraction has 21283 states and 27546 transitions. [2022-11-25 23:56:36,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 23:56:36,043 INFO L276 IsEmpty]: Start isEmpty. Operand 21283 states and 27546 transitions. [2022-11-25 23:56:36,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-25 23:56:36,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:36,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:56:36,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-25 23:56:36,045 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:56:36,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:36,046 INFO L85 PathProgramCache]: Analyzing trace with hash 680657760, now seen corresponding path program 1 times [2022-11-25 23:56:36,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:56:36,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134913966] [2022-11-25 23:56:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:36,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:56:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:36,107 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 23:56:36,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:56:36,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134913966] [2022-11-25 23:56:36,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134913966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:56:36,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:56:36,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:56:36,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145717894] [2022-11-25 23:56:36,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:56:36,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:56:36,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:56:36,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:56:36,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:56:36,109 INFO L87 Difference]: Start difference. First operand 21283 states and 27546 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)