./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f4d752ef50871b3af82701ffcd8ca92c2975f63f8274731e1afbb137d2562986 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 13:22:31,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:22:31,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:22:31,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:22:31,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:22:31,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:22:31,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:22:31,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:22:31,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:22:31,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:22:31,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:22:31,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:22:31,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:22:31,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:22:31,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:22:31,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:22:31,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:22:31,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:22:31,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:22:31,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:22:31,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:22:31,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:22:31,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:22:31,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:22:31,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:22:31,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:22:31,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:22:31,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:22:31,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:22:31,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:22:31,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:22:31,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:22:31,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:22:31,226 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:22:31,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:22:31,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:22:31,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:22:31,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:22:31,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:22:31,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:22:31,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:22:31,230 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:22:31,253 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:22:31,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:22:31,254 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:22:31,254 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:22:31,255 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:22:31,255 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:22:31,255 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:22:31,255 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:22:31,256 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:22:31,256 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:22:31,256 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:22:31,256 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:22:31,256 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:22:31,256 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:22:31,257 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:22:31,257 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:22:31,257 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:22:31,257 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:22:31,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:22:31,258 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:22:31,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:22:31,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:22:31,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:22:31,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:22:31,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:22:31,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:22:31,259 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:22:31,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:22:31,259 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:22:31,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:22:31,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:22:31,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:22:31,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:22:31,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:22:31,260 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:22:31,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:22:31,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:22:31,260 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:22:31,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:22:31,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:22:31,260 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:22:31,261 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_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4d752ef50871b3af82701ffcd8ca92c2975f63f8274731e1afbb137d2562986 [2022-12-14 13:22:31,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:22:31,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:22:31,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:22:31,466 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:22:31,467 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:22:31,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c [2022-12-14 13:22:34,096 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:22:34,295 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:22:34,296 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c [2022-12-14 13:22:34,307 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/data/85d1d9432/3e31462a905f4af99a387f9144d5fc14/FLAG3f060da28 [2022-12-14 13:22:34,319 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/data/85d1d9432/3e31462a905f4af99a387f9144d5fc14 [2022-12-14 13:22:34,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:22:34,323 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:22:34,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:22:34,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:22:34,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:22:34,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:22:34" (1/1) ... [2022-12-14 13:22:34,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5848d56b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:22:34, skipping insertion in model container [2022-12-14 13:22:34,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:22:34" (1/1) ... [2022-12-14 13:22:34,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:22:34,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:22:34,570 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_88b359df-383a-4853-98f7-0cc2a6a62cf6/sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c[17414,17427] [2022-12-14 13:22:34,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:22:34,780 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:22:34,806 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_88b359df-383a-4853-98f7-0cc2a6a62cf6/sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c[17414,17427] [2022-12-14 13:22:34,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:22:34,898 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:22:34,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:22:34 WrapperNode [2022-12-14 13:22:34,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:22:34,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:22:34,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:22:34,900 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:22:34,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:22:34" (1/1) ... [2022-12-14 13:22:34,927 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:22:34" (1/1) ... [2022-12-14 13:22:34,961 INFO L138 Inliner]: procedures = 90, calls = 332, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 802 [2022-12-14 13:22:34,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:22:34,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:22:34,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:22:34,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:22:34,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:22:34" (1/1) ... [2022-12-14 13:22:34,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:22:34" (1/1) ... [2022-12-14 13:22:34,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:22:34" (1/1) ... [2022-12-14 13:22:34,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:22:34" (1/1) ... [2022-12-14 13:22:34,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:22:34" (1/1) ... [2022-12-14 13:22:34,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:22:34" (1/1) ... [2022-12-14 13:22:34,996 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:22:34" (1/1) ... [2022-12-14 13:22:34,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:22:34" (1/1) ... [2022-12-14 13:22:35,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:22:35,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:22:35,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:22:35,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:22:35,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:22:34" (1/1) ... [2022-12-14 13:22:35,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:22:35,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:22:35,030 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:22:35,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:22:35,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:22:35,063 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 13:22:35,063 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 13:22:35,063 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 13:22:35,064 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 13:22:35,064 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 13:22:35,064 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 13:22:35,064 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 13:22:35,064 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 13:22:35,064 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 13:22:35,064 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 13:22:35,064 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 13:22:35,064 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 13:22:35,064 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 13:22:35,064 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 13:22:35,065 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 13:22:35,065 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 13:22:35,065 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 13:22:35,065 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 13:22:35,065 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 13:22:35,065 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 13:22:35,065 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 13:22:35,065 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 13:22:35,065 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 13:22:35,065 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 13:22:35,065 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 13:22:35,066 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 13:22:35,066 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 13:22:35,066 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 13:22:35,066 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 13:22:35,066 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 13:22:35,066 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 13:22:35,066 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 13:22:35,066 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 13:22:35,066 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 13:22:35,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:22:35,066 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 13:22:35,067 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 13:22:35,067 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 13:22:35,067 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 13:22:35,067 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 13:22:35,067 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 13:22:35,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:22:35,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:22:35,067 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 13:22:35,067 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 13:22:35,178 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:22:35,180 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:22:35,952 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:22:36,371 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:22:36,371 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 13:22:36,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:22:36 BoogieIcfgContainer [2022-12-14 13:22:36,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:22:36,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:22:36,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:22:36,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:22:36,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:22:34" (1/3) ... [2022-12-14 13:22:36,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d08c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:22:36, skipping insertion in model container [2022-12-14 13:22:36,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:22:34" (2/3) ... [2022-12-14 13:22:36,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d08c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:22:36, skipping insertion in model container [2022-12-14 13:22:36,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:22:36" (3/3) ... [2022-12-14 13:22:36,380 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product17.cil.c [2022-12-14 13:22:36,398 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:22:36,399 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:22:36,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:22:36,452 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;@1b7e29a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:22:36,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:22:36,456 INFO L276 IsEmpty]: Start isEmpty. Operand has 347 states, 236 states have (on average 1.6228813559322033) internal successors, (383), 257 states have internal predecessors, (383), 88 states have call successors, (88), 21 states have call predecessors, (88), 21 states have return successors, (88), 82 states have call predecessors, (88), 88 states have call successors, (88) [2022-12-14 13:22:36,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 13:22:36,468 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:22:36,469 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] [2022-12-14 13:22:36,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:22:36,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:22:36,473 INFO L85 PathProgramCache]: Analyzing trace with hash 590870164, now seen corresponding path program 1 times [2022-12-14 13:22:36,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:22:36,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041829407] [2022-12-14 13:22:36,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:22:36,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:22:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:22:36,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:22:36,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041829407] [2022-12-14 13:22:36,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041829407] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:22:36,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:22:36,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:22:36,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602329026] [2022-12-14 13:22:36,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:22:36,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 13:22:36,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:22:36,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 13:22:36,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 13:22:36,770 INFO L87 Difference]: Start difference. First operand has 347 states, 236 states have (on average 1.6228813559322033) internal successors, (383), 257 states have internal predecessors, (383), 88 states have call successors, (88), 21 states have call predecessors, (88), 21 states have return successors, (88), 82 states have call predecessors, (88), 88 states have call successors, (88) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-14 13:22:36,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:22:36,880 INFO L93 Difference]: Finished difference Result 365 states and 586 transitions. [2022-12-14 13:22:36,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 13:22:36,882 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 51 [2022-12-14 13:22:36,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:22:36,892 INFO L225 Difference]: With dead ends: 365 [2022-12-14 13:22:36,892 INFO L226 Difference]: Without dead ends: 343 [2022-12-14 13:22:36,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 13:22:36,897 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:22:36,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 517 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:22:36,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-12-14 13:22:36,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2022-12-14 13:22:36,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 234 states have (on average 1.6111111111111112) internal successors, (377), 253 states have internal predecessors, (377), 88 states have call successors, (88), 21 states have call predecessors, (88), 20 states have return successors, (83), 81 states have call predecessors, (83), 83 states have call successors, (83) [2022-12-14 13:22:36,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 548 transitions. [2022-12-14 13:22:36,948 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 548 transitions. Word has length 51 [2022-12-14 13:22:36,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:22:36,949 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 548 transitions. [2022-12-14 13:22:36,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-14 13:22:36,949 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 548 transitions. [2022-12-14 13:22:36,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 13:22:36,952 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:22:36,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:22:36,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:22:36,953 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:22:36,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:22:36,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1533792360, now seen corresponding path program 1 times [2022-12-14 13:22:36,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:22:36,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650682346] [2022-12-14 13:22:36,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:22:36,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:22:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:22:37,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:22:37,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650682346] [2022-12-14 13:22:37,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650682346] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:22:37,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:22:37,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 13:22:37,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515880630] [2022-12-14 13:22:37,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:22:37,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:22:37,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:22:37,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:22:37,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:22:37,180 INFO L87 Difference]: Start difference. First operand 343 states and 548 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 13:22:38,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:22:38,873 INFO L93 Difference]: Finished difference Result 1160 states and 1889 transitions. [2022-12-14 13:22:38,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 13:22:38,873 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2022-12-14 13:22:38,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:22:38,878 INFO L225 Difference]: With dead ends: 1160 [2022-12-14 13:22:38,878 INFO L226 Difference]: Without dead ends: 833 [2022-12-14 13:22:38,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-12-14 13:22:38,882 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 1625 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 2476 mSolverCounterSat, 502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1688 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 2978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 2476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:22:38,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1688 Valid, 1657 Invalid, 2978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [502 Valid, 2476 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 13:22:38,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-12-14 13:22:38,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 784. [2022-12-14 13:22:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 555 states have (on average 1.6396396396396395) internal successors, (910), 590 states have internal predecessors, (910), 185 states have call successors, (185), 41 states have call predecessors, (185), 43 states have return successors, (186), 177 states have call predecessors, (186), 180 states have call successors, (186) [2022-12-14 13:22:38,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1281 transitions. [2022-12-14 13:22:38,950 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1281 transitions. Word has length 52 [2022-12-14 13:22:38,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:22:38,950 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1281 transitions. [2022-12-14 13:22:38,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 13:22:38,951 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1281 transitions. [2022-12-14 13:22:38,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 13:22:38,953 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:22:38,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:22:38,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 13:22:38,954 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:22:38,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:22:38,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1347695068, now seen corresponding path program 1 times [2022-12-14 13:22:38,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:22:38,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356164556] [2022-12-14 13:22:38,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:22:38,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:22:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:22:39,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:22:39,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356164556] [2022-12-14 13:22:39,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356164556] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:22:39,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:22:39,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:22:39,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085143188] [2022-12-14 13:22:39,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:22:39,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:22:39,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:22:39,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:22:39,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:22:39,137 INFO L87 Difference]: Start difference. First operand 784 states and 1281 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 13:22:39,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:22:39,275 INFO L93 Difference]: Finished difference Result 1320 states and 2163 transitions. [2022-12-14 13:22:39,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:22:39,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-12-14 13:22:39,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:22:39,280 INFO L225 Difference]: With dead ends: 1320 [2022-12-14 13:22:39,280 INFO L226 Difference]: Without dead ends: 854 [2022-12-14 13:22:39,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:22:39,282 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 41 mSDsluCounter, 1600 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2157 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:22:39,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 2157 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:22:39,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-12-14 13:22:39,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 796. [2022-12-14 13:22:39,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 564 states have (on average 1.6294326241134751) internal successors, (919), 599 states have internal predecessors, (919), 185 states have call successors, (185), 41 states have call predecessors, (185), 46 states have return successors, (192), 180 states have call predecessors, (192), 180 states have call successors, (192) [2022-12-14 13:22:39,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1296 transitions. [2022-12-14 13:22:39,320 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1296 transitions. Word has length 56 [2022-12-14 13:22:39,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:22:39,320 INFO L495 AbstractCegarLoop]: Abstraction has 796 states and 1296 transitions. [2022-12-14 13:22:39,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 13:22:39,320 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1296 transitions. [2022-12-14 13:22:39,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 13:22:39,322 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:22:39,322 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] [2022-12-14 13:22:39,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 13:22:39,322 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:22:39,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:22:39,323 INFO L85 PathProgramCache]: Analyzing trace with hash -530188532, now seen corresponding path program 1 times [2022-12-14 13:22:39,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:22:39,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300986738] [2022-12-14 13:22:39,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:22:39,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:22:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:22:39,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:22:39,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300986738] [2022-12-14 13:22:39,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300986738] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:22:39,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:22:39,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 13:22:39,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865617072] [2022-12-14 13:22:39,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:22:39,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 13:22:39,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:22:39,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 13:22:39,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:22:39,562 INFO L87 Difference]: Start difference. First operand 796 states and 1296 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 13:22:41,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:22:41,167 INFO L93 Difference]: Finished difference Result 1815 states and 2949 transitions. [2022-12-14 13:22:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:22:41,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 60 [2022-12-14 13:22:41,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:22:41,175 INFO L225 Difference]: With dead ends: 1815 [2022-12-14 13:22:41,175 INFO L226 Difference]: Without dead ends: 1241 [2022-12-14 13:22:41,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:22:41,179 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 1287 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 2630 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1434 SdHoareTripleChecker+Valid, 1567 SdHoareTripleChecker+Invalid, 3091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 2630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:22:41,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1434 Valid, 1567 Invalid, 3091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 2630 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 13:22:41,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2022-12-14 13:22:41,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1147. [2022-12-14 13:22:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 800 states have (on average 1.58375) internal successors, (1267), 852 states have internal predecessors, (1267), 273 states have call successors, (273), 65 states have call predecessors, (273), 73 states have return successors, (289), 266 states have call predecessors, (289), 268 states have call successors, (289) [2022-12-14 13:22:41,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1829 transitions. [2022-12-14 13:22:41,255 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1829 transitions. Word has length 60 [2022-12-14 13:22:41,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:22:41,255 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1829 transitions. [2022-12-14 13:22:41,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 13:22:41,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1829 transitions. [2022-12-14 13:22:41,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 13:22:41,257 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:22:41,257 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] [2022-12-14 13:22:41,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 13:22:41,257 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:22:41,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:22:41,258 INFO L85 PathProgramCache]: Analyzing trace with hash -815889570, now seen corresponding path program 1 times [2022-12-14 13:22:41,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:22:41,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076824899] [2022-12-14 13:22:41,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:22:41,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:22:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:22:41,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:22:41,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076824899] [2022-12-14 13:22:41,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076824899] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:22:41,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:22:41,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:22:41,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748964883] [2022-12-14 13:22:41,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:22:41,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:22:41,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:22:41,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:22:41,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:22:41,352 INFO L87 Difference]: Start difference. First operand 1147 states and 1829 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:22:41,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:22:41,569 INFO L93 Difference]: Finished difference Result 2216 states and 3590 transitions. [2022-12-14 13:22:41,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:22:41,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 63 [2022-12-14 13:22:41,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:22:41,574 INFO L225 Difference]: With dead ends: 2216 [2022-12-14 13:22:41,574 INFO L226 Difference]: Without dead ends: 1147 [2022-12-14 13:22:41,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:22:41,578 INFO L413 NwaCegarLoop]: 540 mSDtfsCounter, 210 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:22:41,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1392 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:22:41,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-12-14 13:22:41,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2022-12-14 13:22:41,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 800 states have (on average 1.54375) internal successors, (1235), 852 states have internal predecessors, (1235), 273 states have call successors, (273), 65 states have call predecessors, (273), 73 states have return successors, (289), 266 states have call predecessors, (289), 268 states have call successors, (289) [2022-12-14 13:22:41,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1797 transitions. [2022-12-14 13:22:41,624 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1797 transitions. Word has length 63 [2022-12-14 13:22:41,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:22:41,625 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1797 transitions. [2022-12-14 13:22:41,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:22:41,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1797 transitions. [2022-12-14 13:22:41,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 13:22:41,626 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:22:41,626 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:22:41,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 13:22:41,626 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:22:41,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:22:41,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1228648249, now seen corresponding path program 1 times [2022-12-14 13:22:41,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:22:41,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038276899] [2022-12-14 13:22:41,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:22:41,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:22:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:22:41,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:22:41,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038276899] [2022-12-14 13:22:41,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038276899] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:22:41,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:22:41,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 13:22:41,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246679994] [2022-12-14 13:22:41,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:22:41,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:22:41,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:22:41,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:22:41,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:22:41,784 INFO L87 Difference]: Start difference. First operand 1147 states and 1797 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:22:43,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:22:43,048 INFO L93 Difference]: Finished difference Result 2203 states and 3468 transitions. [2022-12-14 13:22:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 13:22:43,048 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 65 [2022-12-14 13:22:43,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:22:43,053 INFO L225 Difference]: With dead ends: 2203 [2022-12-14 13:22:43,053 INFO L226 Difference]: Without dead ends: 1335 [2022-12-14 13:22:43,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:22:43,056 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 916 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:22:43,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [986 Valid, 1512 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 2273 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 13:22:43,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2022-12-14 13:22:43,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1174. [2022-12-14 13:22:43,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 818 states have (on average 1.5366748166259168) internal successors, (1257), 874 states have internal predecessors, (1257), 274 states have call successors, (274), 70 states have call predecessors, (274), 81 states have return successors, (300), 266 states have call predecessors, (300), 269 states have call successors, (300) [2022-12-14 13:22:43,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1831 transitions. [2022-12-14 13:22:43,102 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1831 transitions. Word has length 65 [2022-12-14 13:22:43,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:22:43,103 INFO L495 AbstractCegarLoop]: Abstraction has 1174 states and 1831 transitions. [2022-12-14 13:22:43,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:22:43,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1831 transitions. [2022-12-14 13:22:43,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 13:22:43,104 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:22:43,104 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:22:43,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 13:22:43,104 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:22:43,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:22:43,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1428642944, now seen corresponding path program 1 times [2022-12-14 13:22:43,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:22:43,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640599181] [2022-12-14 13:22:43,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:22:43,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:22:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:22:43,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:22:43,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640599181] [2022-12-14 13:22:43,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640599181] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:22:43,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:22:43,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:22:43,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073227514] [2022-12-14 13:22:43,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:22:43,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:22:43,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:22:43,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:22:43,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:22:43,254 INFO L87 Difference]: Start difference. First operand 1174 states and 1831 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-14 13:22:43,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:22:43,711 INFO L93 Difference]: Finished difference Result 1246 states and 1944 transitions. [2022-12-14 13:22:43,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:22:43,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 69 [2022-12-14 13:22:43,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:22:43,717 INFO L225 Difference]: With dead ends: 1246 [2022-12-14 13:22:43,717 INFO L226 Difference]: Without dead ends: 1231 [2022-12-14 13:22:43,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:22:43,719 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 632 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:22:43,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 1664 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:22:43,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2022-12-14 13:22:43,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1178. [2022-12-14 13:22:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 822 states have (on average 1.5340632603406326) internal successors, (1261), 878 states have internal predecessors, (1261), 274 states have call successors, (274), 70 states have call predecessors, (274), 81 states have return successors, (300), 266 states have call predecessors, (300), 269 states have call successors, (300) [2022-12-14 13:22:43,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1835 transitions. [2022-12-14 13:22:43,772 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1835 transitions. Word has length 69 [2022-12-14 13:22:43,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:22:43,772 INFO L495 AbstractCegarLoop]: Abstraction has 1178 states and 1835 transitions. [2022-12-14 13:22:43,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-14 13:22:43,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1835 transitions. [2022-12-14 13:22:43,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 13:22:43,773 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:22:43,774 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:22:43,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 13:22:43,774 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:22:43,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:22:43,774 INFO L85 PathProgramCache]: Analyzing trace with hash -193970470, now seen corresponding path program 1 times [2022-12-14 13:22:43,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:22:43,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520872866] [2022-12-14 13:22:43,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:22:43,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:22:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:22:43,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:22:43,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520872866] [2022-12-14 13:22:43,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520872866] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:22:43,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:22:43,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 13:22:43,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258460036] [2022-12-14 13:22:43,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:22:43,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:22:43,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:22:43,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:22:43,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:22:43,927 INFO L87 Difference]: Start difference. First operand 1178 states and 1835 transitions. Second operand has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 13:22:44,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:22:44,133 INFO L93 Difference]: Finished difference Result 1197 states and 1859 transitions. [2022-12-14 13:22:44,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:22:44,134 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2022-12-14 13:22:44,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:22:44,138 INFO L225 Difference]: With dead ends: 1197 [2022-12-14 13:22:44,138 INFO L226 Difference]: Without dead ends: 1182 [2022-12-14 13:22:44,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:22:44,139 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 257 mSDsluCounter, 2189 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:22:44,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 2682 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:22:44,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2022-12-14 13:22:44,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1178. [2022-12-14 13:22:44,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 822 states have (on average 1.5304136253041363) internal successors, (1258), 878 states have internal predecessors, (1258), 274 states have call successors, (274), 70 states have call predecessors, (274), 81 states have return successors, (300), 266 states have call predecessors, (300), 269 states have call successors, (300) [2022-12-14 13:22:44,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1832 transitions. [2022-12-14 13:22:44,190 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1832 transitions. Word has length 74 [2022-12-14 13:22:44,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:22:44,191 INFO L495 AbstractCegarLoop]: Abstraction has 1178 states and 1832 transitions. [2022-12-14 13:22:44,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 13:22:44,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1832 transitions. [2022-12-14 13:22:44,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 13:22:44,192 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:22:44,192 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:22:44,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 13:22:44,192 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:22:44,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:22:44,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1179238652, now seen corresponding path program 1 times [2022-12-14 13:22:44,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:22:44,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932396948] [2022-12-14 13:22:44,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:22:44,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:22:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 13:22:44,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:22:44,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932396948] [2022-12-14 13:22:44,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932396948] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:22:44,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:22:44,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:22:44,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295819464] [2022-12-14 13:22:44,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:22:44,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:22:44,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:22:44,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:22:44,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:22:44,311 INFO L87 Difference]: Start difference. First operand 1178 states and 1832 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 13:22:45,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:22:45,327 INFO L93 Difference]: Finished difference Result 3783 states and 5989 transitions. [2022-12-14 13:22:45,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:22:45,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 81 [2022-12-14 13:22:45,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:22:45,338 INFO L225 Difference]: With dead ends: 3783 [2022-12-14 13:22:45,338 INFO L226 Difference]: Without dead ends: 2621 [2022-12-14 13:22:45,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:22:45,343 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 1076 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:22:45,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1142 Valid, 671 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 13:22:45,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2022-12-14 13:22:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2374. [2022-12-14 13:22:45,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2374 states, 1688 states have (on average 1.5408767772511849) internal successors, (2601), 1799 states have internal predecessors, (2601), 526 states have call successors, (526), 129 states have call predecessors, (526), 159 states have return successors, (603), 498 states have call predecessors, (603), 521 states have call successors, (603) [2022-12-14 13:22:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 3730 transitions. [2022-12-14 13:22:45,498 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 3730 transitions. Word has length 81 [2022-12-14 13:22:45,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:22:45,498 INFO L495 AbstractCegarLoop]: Abstraction has 2374 states and 3730 transitions. [2022-12-14 13:22:45,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 13:22:45,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 3730 transitions. [2022-12-14 13:22:45,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 13:22:45,501 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:22:45,501 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:22:45,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 13:22:45,501 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:22:45,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:22:45,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2097887170, now seen corresponding path program 1 times [2022-12-14 13:22:45,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:22:45,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950387504] [2022-12-14 13:22:45,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:22:45,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:22:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 13:22:45,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:22:45,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950387504] [2022-12-14 13:22:45,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950387504] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:22:45,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:22:45,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:22:45,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754302011] [2022-12-14 13:22:45,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:22:45,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:22:45,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:22:45,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:22:45,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:22:45,617 INFO L87 Difference]: Start difference. First operand 2374 states and 3730 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 13:22:46,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:22:46,599 INFO L93 Difference]: Finished difference Result 7279 states and 11631 transitions. [2022-12-14 13:22:46,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:22:46,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 82 [2022-12-14 13:22:46,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:22:46,622 INFO L225 Difference]: With dead ends: 7279 [2022-12-14 13:22:46,622 INFO L226 Difference]: Without dead ends: 4924 [2022-12-14 13:22:46,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:22:46,633 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 1063 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:22:46,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1128 Valid, 682 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 13:22:46,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4924 states. [2022-12-14 13:22:47,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4924 to 4608. [2022-12-14 13:22:47,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4608 states, 3307 states have (on average 1.5439975808890234) internal successors, (5106), 3540 states have internal predecessors, (5106), 979 states have call successors, (979), 247 states have call predecessors, (979), 321 states have return successors, (1205), 911 states have call predecessors, (1205), 974 states have call successors, (1205) [2022-12-14 13:22:47,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4608 states to 4608 states and 7290 transitions. [2022-12-14 13:22:47,036 INFO L78 Accepts]: Start accepts. Automaton has 4608 states and 7290 transitions. Word has length 82 [2022-12-14 13:22:47,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:22:47,037 INFO L495 AbstractCegarLoop]: Abstraction has 4608 states and 7290 transitions. [2022-12-14 13:22:47,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 13:22:47,037 INFO L276 IsEmpty]: Start isEmpty. Operand 4608 states and 7290 transitions. [2022-12-14 13:22:47,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 13:22:47,039 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:22:47,039 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:22:47,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 13:22:47,039 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:22:47,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:22:47,040 INFO L85 PathProgramCache]: Analyzing trace with hash 609576454, now seen corresponding path program 1 times [2022-12-14 13:22:47,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:22:47,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426403189] [2022-12-14 13:22:47,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:22:47,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:22:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 13:22:47,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:22:47,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426403189] [2022-12-14 13:22:47,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426403189] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:22:47,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:22:47,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:22:47,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231982414] [2022-12-14 13:22:47,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:22:47,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:22:47,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:22:47,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:22:47,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:22:47,151 INFO L87 Difference]: Start difference. First operand 4608 states and 7290 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 13:22:48,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:22:48,498 INFO L93 Difference]: Finished difference Result 14041 states and 22771 transitions. [2022-12-14 13:22:48,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:22:48,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 83 [2022-12-14 13:22:48,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:22:48,532 INFO L225 Difference]: With dead ends: 14041 [2022-12-14 13:22:48,532 INFO L226 Difference]: Without dead ends: 9458 [2022-12-14 13:22:48,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:22:48,547 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1050 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:22:48,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1114 Valid, 694 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 13:22:48,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9458 states. [2022-12-14 13:22:49,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9458 to 8990. [2022-12-14 13:22:49,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8990 states, 6474 states have (on average 1.5410874266295953) internal successors, (9977), 6963 states have internal predecessors, (9977), 1858 states have call successors, (1858), 483 states have call predecessors, (1858), 657 states have return successors, (2544), 1710 states have call predecessors, (2544), 1853 states have call successors, (2544) [2022-12-14 13:22:49,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8990 states to 8990 states and 14379 transitions. [2022-12-14 13:22:49,114 INFO L78 Accepts]: Start accepts. Automaton has 8990 states and 14379 transitions. Word has length 83 [2022-12-14 13:22:49,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:22:49,114 INFO L495 AbstractCegarLoop]: Abstraction has 8990 states and 14379 transitions. [2022-12-14 13:22:49,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 13:22:49,114 INFO L276 IsEmpty]: Start isEmpty. Operand 8990 states and 14379 transitions. [2022-12-14 13:22:49,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 13:22:49,116 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:22:49,116 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:22:49,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 13:22:49,116 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:22:49,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:22:49,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1716588420, now seen corresponding path program 1 times [2022-12-14 13:22:49,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:22:49,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975469523] [2022-12-14 13:22:49,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:22:49,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:22:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 13:22:49,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:22:49,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975469523] [2022-12-14 13:22:49,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975469523] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:22:49,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:22:49,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:22:49,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642427983] [2022-12-14 13:22:49,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:22:49,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:22:49,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:22:49,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:22:49,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:22:49,235 INFO L87 Difference]: Start difference. First operand 8990 states and 14379 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 13:22:51,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:22:51,128 INFO L93 Difference]: Finished difference Result 27335 states and 45579 transitions. [2022-12-14 13:22:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:22:51,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 84 [2022-12-14 13:22:51,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:22:51,201 INFO L225 Difference]: With dead ends: 27335 [2022-12-14 13:22:51,201 INFO L226 Difference]: Without dead ends: 18382 [2022-12-14 13:22:51,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:22:51,241 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 1037 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 13:22:51,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1100 Valid, 703 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 13:22:51,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18382 states. [2022-12-14 13:22:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18382 to 17596. [2022-12-14 13:22:52,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17596 states, 12677 states have (on average 1.5350635008282716) internal successors, (19460), 13702 states have internal predecessors, (19460), 3565 states have call successors, (3565), 955 states have call predecessors, (3565), 1353 states have return successors, (5735), 3257 states have call predecessors, (5735), 3560 states have call successors, (5735) [2022-12-14 13:22:52,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17596 states to 17596 states and 28760 transitions. [2022-12-14 13:22:52,420 INFO L78 Accepts]: Start accepts. Automaton has 17596 states and 28760 transitions. Word has length 84 [2022-12-14 13:22:52,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:22:52,420 INFO L495 AbstractCegarLoop]: Abstraction has 17596 states and 28760 transitions. [2022-12-14 13:22:52,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 13:22:52,420 INFO L276 IsEmpty]: Start isEmpty. Operand 17596 states and 28760 transitions. [2022-12-14 13:22:52,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 13:22:52,422 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:22:52,422 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:22:52,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 13:22:52,422 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:22:52,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:22:52,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1674224904, now seen corresponding path program 1 times [2022-12-14 13:22:52,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:22:52,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019251113] [2022-12-14 13:22:52,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:22:52,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:22:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:52,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 13:22:52,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:22:52,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019251113] [2022-12-14 13:22:52,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019251113] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:22:52,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:22:52,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:22:52,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075018103] [2022-12-14 13:22:52,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:22:52,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:22:52,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:22:52,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:22:52,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:22:52,563 INFO L87 Difference]: Start difference. First operand 17596 states and 28760 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 13:22:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:22:55,358 INFO L93 Difference]: Finished difference Result 53615 states and 94143 transitions. [2022-12-14 13:22:55,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:22:55,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 85 [2022-12-14 13:22:55,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:22:55,484 INFO L225 Difference]: With dead ends: 53615 [2022-12-14 13:22:55,484 INFO L226 Difference]: Without dead ends: 36070 [2022-12-14 13:22:55,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:22:55,530 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 1028 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:22:55,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1090 Valid, 717 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 13:22:55,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36070 states. [2022-12-14 13:22:57,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36070 to 34434. [2022-12-14 13:22:57,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34434 states, 24860 states have (on average 1.5318986323411101) internal successors, (38083), 26912 states have internal predecessors, (38083), 6877 states have call successors, (6877), 1896 states have call predecessors, (6877), 2696 states have return successors, (13406), 6248 states have call predecessors, (13406), 6872 states have call successors, (13406) [2022-12-14 13:22:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34434 states to 34434 states and 58366 transitions. [2022-12-14 13:22:58,073 INFO L78 Accepts]: Start accepts. Automaton has 34434 states and 58366 transitions. Word has length 85 [2022-12-14 13:22:58,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:22:58,074 INFO L495 AbstractCegarLoop]: Abstraction has 34434 states and 58366 transitions. [2022-12-14 13:22:58,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 13:22:58,074 INFO L276 IsEmpty]: Start isEmpty. Operand 34434 states and 58366 transitions. [2022-12-14 13:22:58,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 13:22:58,080 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:22:58,080 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:22:58,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 13:22:58,080 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:22:58,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:22:58,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1170432352, now seen corresponding path program 1 times [2022-12-14 13:22:58,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:22:58,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211211748] [2022-12-14 13:22:58,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:22:58,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:22:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 13:22:58,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:22:58,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211211748] [2022-12-14 13:22:58,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211211748] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:22:58,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070011674] [2022-12-14 13:22:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:22:58,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:22:58,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:22:58,189 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:22:58,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:22:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:58,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 1808 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:22:58,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:22:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 13:22:58,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:22:58,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070011674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:22:58,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:22:58,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 13:22:58,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74519] [2022-12-14 13:22:58,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:22:58,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:22:58,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:22:58,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:22:58,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:22:58,460 INFO L87 Difference]: Start difference. First operand 34434 states and 58366 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 13:23:00,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:23:00,498 INFO L93 Difference]: Finished difference Result 72595 states and 128120 transitions. [2022-12-14 13:23:00,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:23:00,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 131 [2022-12-14 13:23:00,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:23:00,648 INFO L225 Difference]: With dead ends: 72595 [2022-12-14 13:23:00,648 INFO L226 Difference]: Without dead ends: 38178 [2022-12-14 13:23:00,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:23:00,775 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 213 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:23:00,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1287 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:23:00,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38178 states. [2022-12-14 13:23:03,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38178 to 38178. [2022-12-14 13:23:03,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38178 states, 28508 states have (on average 1.58169636593237) internal successors, (45091), 30560 states have internal predecessors, (45091), 6877 states have call successors, (6877), 1992 states have call predecessors, (6877), 2792 states have return successors, (13406), 6248 states have call predecessors, (13406), 6872 states have call successors, (13406) [2022-12-14 13:23:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38178 states to 38178 states and 65374 transitions. [2022-12-14 13:23:03,469 INFO L78 Accepts]: Start accepts. Automaton has 38178 states and 65374 transitions. Word has length 131 [2022-12-14 13:23:03,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:23:03,469 INFO L495 AbstractCegarLoop]: Abstraction has 38178 states and 65374 transitions. [2022-12-14 13:23:03,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 13:23:03,470 INFO L276 IsEmpty]: Start isEmpty. Operand 38178 states and 65374 transitions. [2022-12-14 13:23:03,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 13:23:03,474 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:23:03,474 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:23:03,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:23:03,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 13:23:03,675 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:23:03,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:23:03,675 INFO L85 PathProgramCache]: Analyzing trace with hash 947010169, now seen corresponding path program 1 times [2022-12-14 13:23:03,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:23:03,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527350945] [2022-12-14 13:23:03,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:23:03,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:23:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:23:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 13:23:03,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:23:03,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527350945] [2022-12-14 13:23:03,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527350945] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:23:03,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577207567] [2022-12-14 13:23:03,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:23:03,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:23:03,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:23:03,786 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:23:03,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:23:04,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:23:04,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 1813 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:23:04,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:23:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 13:23:04,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:23:04,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577207567] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:23:04,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:23:04,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 13:23:04,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176359477] [2022-12-14 13:23:04,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:23:04,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:23:04,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:23:04,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:23:04,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:23:04,077 INFO L87 Difference]: Start difference. First operand 38178 states and 65374 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 13:23:06,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:23:06,198 INFO L93 Difference]: Finished difference Result 80083 states and 142037 transitions. [2022-12-14 13:23:06,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:23:06,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 136 [2022-12-14 13:23:06,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:23:06,340 INFO L225 Difference]: With dead ends: 80083 [2022-12-14 13:23:06,340 INFO L226 Difference]: Without dead ends: 41922 [2022-12-14 13:23:06,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:23:06,436 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 211 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:23:06,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1287 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:23:06,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41922 states. [2022-12-14 13:23:08,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41922 to 41922. [2022-12-14 13:23:08,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41922 states, 32156 states have (on average 1.6201952979226273) internal successors, (52099), 34208 states have internal predecessors, (52099), 6877 states have call successors, (6877), 2088 states have call predecessors, (6877), 2888 states have return successors, (13406), 6248 states have call predecessors, (13406), 6872 states have call successors, (13406) [2022-12-14 13:23:08,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41922 states to 41922 states and 72382 transitions. [2022-12-14 13:23:08,719 INFO L78 Accepts]: Start accepts. Automaton has 41922 states and 72382 transitions. Word has length 136 [2022-12-14 13:23:08,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:23:08,719 INFO L495 AbstractCegarLoop]: Abstraction has 41922 states and 72382 transitions. [2022-12-14 13:23:08,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 13:23:08,720 INFO L276 IsEmpty]: Start isEmpty. Operand 41922 states and 72382 transitions. [2022-12-14 13:23:08,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-14 13:23:08,725 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:23:08,726 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:23:08,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:23:08,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 13:23:08,928 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:23:08,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:23:08,929 INFO L85 PathProgramCache]: Analyzing trace with hash 521974521, now seen corresponding path program 1 times [2022-12-14 13:23:08,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:23:08,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520843890] [2022-12-14 13:23:08,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:23:08,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:23:08,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:23:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-14 13:23:09,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:23:09,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520843890] [2022-12-14 13:23:09,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520843890] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:23:09,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258553511] [2022-12-14 13:23:09,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:23:09,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:23:09,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:23:09,124 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:23:09,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:23:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:23:09,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 1817 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:23:09,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:23:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 13:23:09,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:23:09,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258553511] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:23:09,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:23:09,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 13:23:09,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122979654] [2022-12-14 13:23:09,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:23:09,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:23:09,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:23:09,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:23:09,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:23:09,394 INFO L87 Difference]: Start difference. First operand 41922 states and 72382 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 13:23:12,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:23:12,081 INFO L93 Difference]: Finished difference Result 87571 states and 155954 transitions. [2022-12-14 13:23:12,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:23:12,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 140 [2022-12-14 13:23:12,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:23:12,229 INFO L225 Difference]: With dead ends: 87571 [2022-12-14 13:23:12,229 INFO L226 Difference]: Without dead ends: 45666 [2022-12-14 13:23:12,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:23:12,314 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 209 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:23:12,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1287 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:23:12,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45666 states. [2022-12-14 13:23:14,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45666 to 45666. [2022-12-14 13:23:14,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45666 states, 35804 states have (on average 1.650849067143336) internal successors, (59107), 37856 states have internal predecessors, (59107), 6877 states have call successors, (6877), 2184 states have call predecessors, (6877), 2984 states have return successors, (13406), 6248 states have call predecessors, (13406), 6872 states have call successors, (13406) [2022-12-14 13:23:14,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45666 states to 45666 states and 79390 transitions. [2022-12-14 13:23:14,526 INFO L78 Accepts]: Start accepts. Automaton has 45666 states and 79390 transitions. Word has length 140 [2022-12-14 13:23:14,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:23:14,527 INFO L495 AbstractCegarLoop]: Abstraction has 45666 states and 79390 transitions. [2022-12-14 13:23:14,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 13:23:14,527 INFO L276 IsEmpty]: Start isEmpty. Operand 45666 states and 79390 transitions. [2022-12-14 13:23:14,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 13:23:14,532 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:23:14,532 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:23:14,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 13:23:14,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 13:23:14,733 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:23:14,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:23:14,734 INFO L85 PathProgramCache]: Analyzing trace with hash 559008384, now seen corresponding path program 1 times [2022-12-14 13:23:14,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:23:14,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954423459] [2022-12-14 13:23:14,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:23:14,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:23:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:23:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 13:23:16,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:23:16,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954423459] [2022-12-14 13:23:16,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954423459] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:23:16,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095569245] [2022-12-14 13:23:16,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:23:16,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:23:16,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:23:16,004 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:23:16,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:23:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:23:16,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 1820 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:23:16,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:23:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 13:23:16,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:23:16,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095569245] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:23:16,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:23:16,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2022-12-14 13:23:16,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919557286] [2022-12-14 13:23:16,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:23:16,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:23:16,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:23:16,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:23:16,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-12-14 13:23:16,234 INFO L87 Difference]: Start difference. First operand 45666 states and 79390 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 13:23:18,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:23:18,254 INFO L93 Difference]: Finished difference Result 95059 states and 169871 transitions. [2022-12-14 13:23:18,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:23:18,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 143 [2022-12-14 13:23:18,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:23:18,418 INFO L225 Difference]: With dead ends: 95059 [2022-12-14 13:23:18,418 INFO L226 Difference]: Without dead ends: 49410 [2022-12-14 13:23:18,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-12-14 13:23:18,520 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 207 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:23:18,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1287 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:23:18,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49410 states. [2022-12-14 13:23:21,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49410 to 49410. [2022-12-14 13:23:21,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49410 states, 39452 states have (on average 1.67583392476934) internal successors, (66115), 41504 states have internal predecessors, (66115), 6877 states have call successors, (6877), 2280 states have call predecessors, (6877), 3080 states have return successors, (13406), 6248 states have call predecessors, (13406), 6872 states have call successors, (13406) [2022-12-14 13:23:21,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49410 states to 49410 states and 86398 transitions. [2022-12-14 13:23:21,222 INFO L78 Accepts]: Start accepts. Automaton has 49410 states and 86398 transitions. Word has length 143 [2022-12-14 13:23:21,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:23:21,222 INFO L495 AbstractCegarLoop]: Abstraction has 49410 states and 86398 transitions. [2022-12-14 13:23:21,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 13:23:21,222 INFO L276 IsEmpty]: Start isEmpty. Operand 49410 states and 86398 transitions. [2022-12-14 13:23:21,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 13:23:21,227 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:23:21,227 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:23:21,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:23:21,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 13:23:21,429 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:23:21,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:23:21,430 INFO L85 PathProgramCache]: Analyzing trace with hash 469845424, now seen corresponding path program 1 times [2022-12-14 13:23:21,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:23:21,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085060765] [2022-12-14 13:23:21,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:23:21,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:23:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:23:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 13:23:22,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:23:22,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085060765] [2022-12-14 13:23:22,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085060765] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:23:22,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562640012] [2022-12-14 13:23:22,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:23:22,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:23:22,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:23:22,480 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:23:22,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:23:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:23:22,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 1822 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:23:22,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:23:22,711 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 13:23:22,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:23:22,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562640012] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:23:22,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:23:22,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2022-12-14 13:23:22,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230335162] [2022-12-14 13:23:22,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:23:22,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:23:22,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:23:22,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:23:22,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-12-14 13:23:22,713 INFO L87 Difference]: Start difference. First operand 49410 states and 86398 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 13:23:24,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:23:24,755 INFO L93 Difference]: Finished difference Result 102547 states and 183788 transitions. [2022-12-14 13:23:24,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:23:24,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 145 [2022-12-14 13:23:24,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:23:24,934 INFO L225 Difference]: With dead ends: 102547 [2022-12-14 13:23:24,934 INFO L226 Difference]: Without dead ends: 53154 [2022-12-14 13:23:25,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-12-14 13:23:25,052 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 205 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:23:25,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1287 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:23:25,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53154 states. [2022-12-14 13:23:27,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53154 to 53154. [2022-12-14 13:23:27,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53154 states, 43100 states have (on average 1.6965893271461716) internal successors, (73123), 45152 states have internal predecessors, (73123), 6877 states have call successors, (6877), 2376 states have call predecessors, (6877), 3176 states have return successors, (13406), 6248 states have call predecessors, (13406), 6872 states have call successors, (13406) [2022-12-14 13:23:27,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53154 states to 53154 states and 93406 transitions. [2022-12-14 13:23:27,396 INFO L78 Accepts]: Start accepts. Automaton has 53154 states and 93406 transitions. Word has length 145 [2022-12-14 13:23:27,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:23:27,396 INFO L495 AbstractCegarLoop]: Abstraction has 53154 states and 93406 transitions. [2022-12-14 13:23:27,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 13:23:27,397 INFO L276 IsEmpty]: Start isEmpty. Operand 53154 states and 93406 transitions. [2022-12-14 13:23:27,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 13:23:27,401 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:23:27,401 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:23:27,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 13:23:27,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 13:23:27,603 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:23:27,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:23:27,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1878856287, now seen corresponding path program 1 times [2022-12-14 13:23:27,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:23:27,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47413412] [2022-12-14 13:23:27,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:23:27,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:23:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:23:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 13:23:28,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:23:28,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47413412] [2022-12-14 13:23:28,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47413412] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:23:28,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733217770] [2022-12-14 13:23:28,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:23:28,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:23:28,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:23:28,595 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:23:28,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:23:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:23:28,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 1819 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-14 13:23:28,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:23:29,712 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 13:23:29,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:23:29,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733217770] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:23:29,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:23:29,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [26] total 38 [2022-12-14 13:23:29,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696773644] [2022-12-14 13:23:29,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:23:29,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 13:23:29,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:23:29,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 13:23:29,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 13:23:29,714 INFO L87 Difference]: Start difference. First operand 53154 states and 93406 transitions. Second operand has 14 states, 10 states have (on average 8.1) internal successors, (81), 12 states have internal predecessors, (81), 6 states have call successors, (22), 3 states have call predecessors, (22), 7 states have return successors, (21), 7 states have call predecessors, (21), 5 states have call successors, (21) [2022-12-14 13:23:33,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:23:33,679 INFO L93 Difference]: Finished difference Result 106300 states and 186804 transitions. [2022-12-14 13:23:33,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 13:23:33,680 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 8.1) internal successors, (81), 12 states have internal predecessors, (81), 6 states have call successors, (22), 3 states have call predecessors, (22), 7 states have return successors, (21), 7 states have call predecessors, (21), 5 states have call successors, (21) Word has length 145 [2022-12-14 13:23:33,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:23:33,836 INFO L225 Difference]: With dead ends: 106300 [2022-12-14 13:23:33,836 INFO L226 Difference]: Without dead ends: 53257 [2022-12-14 13:23:33,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=175, Invalid=1895, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 13:23:33,924 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 735 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 3873 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 4213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 3873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:23:33,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 1475 Invalid, 4213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 3873 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 13:23:33,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53257 states. [2022-12-14 13:23:36,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53257 to 53154. [2022-12-14 13:23:36,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53154 states, 43100 states have (on average 1.6943619489559165) internal successors, (73027), 45152 states have internal predecessors, (73027), 6877 states have call successors, (6877), 2376 states have call predecessors, (6877), 3176 states have return successors, (13406), 6248 states have call predecessors, (13406), 6872 states have call successors, (13406) [2022-12-14 13:23:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53154 states to 53154 states and 93310 transitions. [2022-12-14 13:23:36,431 INFO L78 Accepts]: Start accepts. Automaton has 53154 states and 93310 transitions. Word has length 145 [2022-12-14 13:23:36,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:23:36,431 INFO L495 AbstractCegarLoop]: Abstraction has 53154 states and 93310 transitions. [2022-12-14 13:23:36,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 8.1) internal successors, (81), 12 states have internal predecessors, (81), 6 states have call successors, (22), 3 states have call predecessors, (22), 7 states have return successors, (21), 7 states have call predecessors, (21), 5 states have call successors, (21) [2022-12-14 13:23:36,432 INFO L276 IsEmpty]: Start isEmpty. Operand 53154 states and 93310 transitions. [2022-12-14 13:23:36,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 13:23:36,436 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:23:36,436 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:23:36,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 13:23:36,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:23:36,638 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:23:36,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:23:36,639 INFO L85 PathProgramCache]: Analyzing trace with hash -377732165, now seen corresponding path program 1 times [2022-12-14 13:23:36,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:23:36,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5501389] [2022-12-14 13:23:36,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:23:36,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:23:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:23:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 13:23:37,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:23:37,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5501389] [2022-12-14 13:23:37,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5501389] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:23:37,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31634074] [2022-12-14 13:23:37,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:23:37,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:23:37,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:23:37,699 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:23:37,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b359df-383a-4853-98f7-0cc2a6a62cf6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:23:37,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:23:37,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 1821 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-14 13:23:37,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:23:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 13:23:38,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:23:40,315 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 13:23:47,495 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 13:23:47,783 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 13:23:53,843 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 13:23:54,123 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 13:24:00,639 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 13:24:00,769 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time... [2022-12-14 13:26:33,403 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 49188 disjunctions.