./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90244a0d-fcec-4745-ade2-0e3505b54dd0/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90244a0d-fcec-4745-ade2-0e3505b54dd0/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90244a0d-fcec-4745-ade2-0e3505b54dd0/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90244a0d-fcec-4745-ade2-0e3505b54dd0/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90244a0d-fcec-4745-ade2-0e3505b54dd0/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90244a0d-fcec-4745-ade2-0e3505b54dd0/bin/utaipan-7li7fVZpFI --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 4d9d31939acfea5ee9b43b1f06257671943c7251c27c351c5e445aa6495fd098 --- 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-5e519f3 [2022-11-03 01:44:40,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:44:40,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:44:40,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:44:40,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:44:40,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:44:40,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:44:40,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:44:40,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:44:40,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:44:40,985 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:44:40,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:44:40,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:44:40,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:44:40,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:44:40,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:44:40,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:44:40,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:44:40,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:44:40,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:44:40,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:44:41,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:44:41,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:44:41,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:44:41,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:44:41,025 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:44:41,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:44:41,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:44:41,027 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:44:41,028 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:44:41,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:44:41,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:44:41,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:44:41,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:44:41,031 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:44:41,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:44:41,032 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:44:41,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:44:41,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:44:41,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:44:41,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:44:41,040 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90244a0d-fcec-4745-ade2-0e3505b54dd0/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:44:41,081 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:44:41,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:44:41,082 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:44:41,082 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:44:41,083 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:44:41,083 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:44:41,083 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:44:41,084 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:44:41,084 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:44:41,084 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:44:41,085 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:44:41,085 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:44:41,085 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:44:41,086 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:44:41,086 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:44:41,086 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:44:41,086 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:44:41,086 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:44:41,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:44:41,087 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:44:41,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:44:41,088 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:44:41,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:44:41,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:44:41,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:44:41,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:44:41,089 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:44:41,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:44:41,089 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:44:41,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:44:41,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:44:41,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:44:41,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:44:41,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:44:41,091 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:44:41,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:44:41,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:44:41,091 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:44:41,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:44:41,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:44:41,092 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:44:41,092 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_90244a0d-fcec-4745-ade2-0e3505b54dd0/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90244a0d-fcec-4745-ade2-0e3505b54dd0/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d9d31939acfea5ee9b43b1f06257671943c7251c27c351c5e445aa6495fd098 [2022-11-03 01:44:41,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:44:41,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:44:41,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:44:41,503 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:44:41,504 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:44:41,506 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90244a0d-fcec-4745-ade2-0e3505b54dd0/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c [2022-11-03 01:44:41,580 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90244a0d-fcec-4745-ade2-0e3505b54dd0/bin/utaipan-7li7fVZpFI/data/95fc8d577/1a670dfebee342f782b187b2ffc93e20/FLAG442ff887f [2022-11-03 01:44:42,293 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:44:42,294 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90244a0d-fcec-4745-ade2-0e3505b54dd0/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c [2022-11-03 01:44:42,333 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90244a0d-fcec-4745-ade2-0e3505b54dd0/bin/utaipan-7li7fVZpFI/data/95fc8d577/1a670dfebee342f782b187b2ffc93e20/FLAG442ff887f [2022-11-03 01:44:42,482 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90244a0d-fcec-4745-ade2-0e3505b54dd0/bin/utaipan-7li7fVZpFI/data/95fc8d577/1a670dfebee342f782b187b2ffc93e20 [2022-11-03 01:44:42,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:44:42,486 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:44:42,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:44:42,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:44:42,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:44:42,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:44:42" (1/1) ... [2022-11-03 01:44:42,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fd58a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:42, skipping insertion in model container [2022-11-03 01:44:42,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:44:42" (1/1) ... [2022-11-03 01:44:42,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:44:42,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:44:43,152 WARN L230 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_90244a0d-fcec-4745-ade2-0e3505b54dd0/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c[38051,38064] [2022-11-03 01:44:43,261 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:44:43,271 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:44:43,331 WARN L230 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_90244a0d-fcec-4745-ade2-0e3505b54dd0/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c[38051,38064] [2022-11-03 01:44:43,369 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:44:43,393 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:44:43,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:43 WrapperNode [2022-11-03 01:44:43,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:44:43,395 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:44:43,395 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:44:43,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:44:43,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:43" (1/1) ... [2022-11-03 01:44:43,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:43" (1/1) ... [2022-11-03 01:44:43,490 INFO L138 Inliner]: procedures = 92, calls = 338, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 817 [2022-11-03 01:44:43,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:44:43,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:44:43,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:44:43,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:44:43,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:43" (1/1) ... [2022-11-03 01:44:43,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:43" (1/1) ... [2022-11-03 01:44:43,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:43" (1/1) ... [2022-11-03 01:44:43,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:43" (1/1) ... [2022-11-03 01:44:43,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:43" (1/1) ... [2022-11-03 01:44:43,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:43" (1/1) ... [2022-11-03 01:44:43,550 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:43" (1/1) ... [2022-11-03 01:44:43,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:43" (1/1) ... [2022-11-03 01:44:43,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:44:43,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:44:43,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:44:43,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:44:43,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:43" (1/1) ... [2022-11-03 01:44:43,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:44:43,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90244a0d-fcec-4745-ade2-0e3505b54dd0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:43,604 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90244a0d-fcec-4745-ade2-0e3505b54dd0/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:44:43,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90244a0d-fcec-4745-ade2-0e3505b54dd0/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:44:43,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:44:43,645 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 01:44:43,645 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 01:44:43,645 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 01:44:43,645 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 01:44:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 01:44:43,646 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 01:44:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 01:44:43,646 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 01:44:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 01:44:43,646 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 01:44:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 01:44:43,647 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 01:44:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 01:44:43,647 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 01:44:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-03 01:44:43,647 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-03 01:44:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 01:44:43,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 01:44:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 01:44:43,648 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 01:44:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 01:44:43,648 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 01:44:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 01:44:43,648 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 01:44:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 01:44:43,649 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 01:44:43,649 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 01:44:43,649 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 01:44:43,649 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 01:44:43,649 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 01:44:43,649 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 01:44:43,649 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 01:44:43,650 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 01:44:43,650 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 01:44:43,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:44:43,650 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2022-11-03 01:44:43,650 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2022-11-03 01:44:43,650 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 01:44:43,651 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 01:44:43,651 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 01:44:43,651 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 01:44:43,651 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 01:44:43,651 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 01:44:43,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:44:43,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:44:43,652 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 01:44:43,652 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 01:44:43,803 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:44:43,806 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:44:45,222 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:44:46,038 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:44:46,038 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:44:46,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:44:46 BoogieIcfgContainer [2022-11-03 01:44:46,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:44:46,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:44:46,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:44:46,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:44:46,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:44:42" (1/3) ... [2022-11-03 01:44:46,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63860743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:44:46, skipping insertion in model container [2022-11-03 01:44:46,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:43" (2/3) ... [2022-11-03 01:44:46,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63860743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:44:46, skipping insertion in model container [2022-11-03 01:44:46,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:44:46" (3/3) ... [2022-11-03 01:44:46,061 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product18.cil.c [2022-11-03 01:44:46,081 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:44:46,082 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:44:46,161 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:44:46,168 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;@870bbac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:44:46,169 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:44:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand has 356 states, 241 states have (on average 1.6182572614107884) internal successors, (390), 264 states have internal predecessors, (390), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) [2022-11-03 01:44:46,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 01:44:46,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:46,190 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] [2022-11-03 01:44:46,190 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:46,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:46,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2110685333, now seen corresponding path program 1 times [2022-11-03 01:44:46,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:46,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458258005] [2022-11-03 01:44:46,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:46,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:46,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:46,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458258005] [2022-11-03 01:44:46,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458258005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:46,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:46,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:44:46,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255458925] [2022-11-03 01:44:46,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:46,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 01:44:46,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:46,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 01:44:46,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:44:46,771 INFO L87 Difference]: Start difference. First operand has 356 states, 241 states have (on average 1.6182572614107884) internal successors, (390), 264 states have internal predecessors, (390), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 01:44:46,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:46,952 INFO L93 Difference]: Finished difference Result 374 states and 599 transitions. [2022-11-03 01:44:46,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 01:44:46,955 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-11-03 01:44:46,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:46,974 INFO L225 Difference]: With dead ends: 374 [2022-11-03 01:44:46,974 INFO L226 Difference]: Without dead ends: 352 [2022-11-03 01:44:46,982 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 [2022-11-03 01:44:46,986 INFO L413 NwaCegarLoop]: 530 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, 530 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 [2022-11-03 01:44:46,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 530 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:44:47,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-11-03 01:44:47,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2022-11-03 01:44:47,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 239 states have (on average 1.606694560669456) internal successors, (384), 260 states have internal predecessors, (384), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 83 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-03 01:44:47,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 561 transitions. [2022-11-03 01:44:47,066 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 561 transitions. Word has length 39 [2022-11-03 01:44:47,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:47,067 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 561 transitions. [2022-11-03 01:44:47,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 01:44:47,068 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 561 transitions. [2022-11-03 01:44:47,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:44:47,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:47,072 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] [2022-11-03 01:44:47,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:44:47,073 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:47,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:47,074 INFO L85 PathProgramCache]: Analyzing trace with hash 774255056, now seen corresponding path program 1 times [2022-11-03 01:44:47,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:47,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383516937] [2022-11-03 01:44:47,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:47,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:47,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:47,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383516937] [2022-11-03 01:44:47,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383516937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:47,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:47,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:44:47,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780407067] [2022-11-03 01:44:47,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:47,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:44:47,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:47,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:44:47,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:44:47,651 INFO L87 Difference]: Start difference. First operand 352 states and 561 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:44:49,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:49,960 INFO L93 Difference]: Finished difference Result 1156 states and 1884 transitions. [2022-11-03 01:44:49,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:44:49,961 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-11-03 01:44:49,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:49,969 INFO L225 Difference]: With dead ends: 1156 [2022-11-03 01:44:49,969 INFO L226 Difference]: Without dead ends: 820 [2022-11-03 01:44:49,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:44:49,974 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 1150 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:49,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1210 Valid, 1286 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 01:44:49,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-11-03 01:44:50,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 733. [2022-11-03 01:44:50,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 521 states have (on average 1.6314779270633397) internal successors, (850), 551 states have internal predecessors, (850), 174 states have call successors, (174), 36 states have call predecessors, (174), 37 states have return successors, (176), 158 states have call predecessors, (176), 169 states have call successors, (176) [2022-11-03 01:44:50,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1200 transitions. [2022-11-03 01:44:50,094 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1200 transitions. Word has length 40 [2022-11-03 01:44:50,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:50,095 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 1200 transitions. [2022-11-03 01:44:50,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:44:50,096 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1200 transitions. [2022-11-03 01:44:50,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 01:44:50,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:50,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:50,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:44:50,109 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:50,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:50,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1589422790, now seen corresponding path program 1 times [2022-11-03 01:44:50,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:50,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096765627] [2022-11-03 01:44:50,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:50,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:50,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:50,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096765627] [2022-11-03 01:44:50,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096765627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:50,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:50,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:44:50,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343568148] [2022-11-03 01:44:50,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:50,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:44:50,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:50,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:44:50,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:44:50,633 INFO L87 Difference]: Start difference. First operand 733 states and 1200 transitions. Second operand has 9 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 01:44:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:53,994 INFO L93 Difference]: Finished difference Result 2155 states and 3549 transitions. [2022-11-03 01:44:53,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 01:44:53,994 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2022-11-03 01:44:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:54,007 INFO L225 Difference]: With dead ends: 2155 [2022-11-03 01:44:54,008 INFO L226 Difference]: Without dead ends: 1438 [2022-11-03 01:44:54,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-11-03 01:44:54,020 INFO L413 NwaCegarLoop]: 920 mSDtfsCounter, 913 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 4269 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 3016 SdHoareTripleChecker+Invalid, 4617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 4269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:54,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 3016 Invalid, 4617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 4269 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-03 01:44:54,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2022-11-03 01:44:54,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1420. [2022-11-03 01:44:54,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1005 states have (on average 1.6199004975124378) internal successors, (1628), 1056 states have internal predecessors, (1628), 345 states have call successors, (345), 58 states have call predecessors, (345), 69 states have return successors, (364), 327 states have call predecessors, (364), 340 states have call successors, (364) [2022-11-03 01:44:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 2337 transitions. [2022-11-03 01:44:54,213 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 2337 transitions. Word has length 61 [2022-11-03 01:44:54,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:54,214 INFO L495 AbstractCegarLoop]: Abstraction has 1420 states and 2337 transitions. [2022-11-03 01:44:54,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 01:44:54,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 2337 transitions. [2022-11-03 01:44:54,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-03 01:44:54,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:54,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:54,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:44:54,218 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:54,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:54,222 INFO L85 PathProgramCache]: Analyzing trace with hash -19981388, now seen corresponding path program 1 times [2022-11-03 01:44:54,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:54,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828480124] [2022-11-03 01:44:54,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:54,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:54,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:54,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828480124] [2022-11-03 01:44:54,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828480124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:54,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:54,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:44:54,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390265920] [2022-11-03 01:44:54,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:54,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:44:54,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:54,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:44:54,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:44:54,561 INFO L87 Difference]: Start difference. First operand 1420 states and 2337 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 01:44:57,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:57,212 INFO L93 Difference]: Finished difference Result 4101 states and 6770 transitions. [2022-11-03 01:44:57,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:44:57,213 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2022-11-03 01:44:57,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:57,234 INFO L225 Difference]: With dead ends: 4101 [2022-11-03 01:44:57,235 INFO L226 Difference]: Without dead ends: 2699 [2022-11-03 01:44:57,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:44:57,253 INFO L413 NwaCegarLoop]: 743 mSDtfsCounter, 1633 mSDsluCounter, 1426 mSDsCounter, 0 mSdLazyCounter, 2158 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1696 SdHoareTripleChecker+Valid, 2069 SdHoareTripleChecker+Invalid, 2675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 2158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:57,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1696 Valid, 2069 Invalid, 2675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 2158 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 01:44:57,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2022-11-03 01:44:57,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2588. [2022-11-03 01:44:57,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2588 states, 1882 states have (on average 1.642933049946865) internal successors, (3092), 1964 states have internal predecessors, (3092), 573 states have call successors, (573), 109 states have call predecessors, (573), 132 states have return successors, (616), 547 states have call predecessors, (616), 568 states have call successors, (616) [2022-11-03 01:44:57,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2588 states to 2588 states and 4281 transitions. [2022-11-03 01:44:57,469 INFO L78 Accepts]: Start accepts. Automaton has 2588 states and 4281 transitions. Word has length 62 [2022-11-03 01:44:57,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:57,473 INFO L495 AbstractCegarLoop]: Abstraction has 2588 states and 4281 transitions. [2022-11-03 01:44:57,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 01:44:57,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2588 states and 4281 transitions. [2022-11-03 01:44:57,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 01:44:57,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:57,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:57,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:44:57,485 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:57,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:57,486 INFO L85 PathProgramCache]: Analyzing trace with hash -224222184, now seen corresponding path program 1 times [2022-11-03 01:44:57,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:57,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906961394] [2022-11-03 01:44:57,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:57,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:57,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:57,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906961394] [2022-11-03 01:44:57,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906961394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:57,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:57,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:44:57,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995788304] [2022-11-03 01:44:57,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:57,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:44:57,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:57,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:44:57,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:44:57,747 INFO L87 Difference]: Start difference. First operand 2588 states and 4281 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:44:58,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:58,048 INFO L93 Difference]: Finished difference Result 4540 states and 7514 transitions. [2022-11-03 01:44:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:44:58,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 66 [2022-11-03 01:44:58,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:58,075 INFO L225 Difference]: With dead ends: 4540 [2022-11-03 01:44:58,075 INFO L226 Difference]: Without dead ends: 2652 [2022-11-03 01:44:58,084 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 [2022-11-03 01:44:58,087 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 7 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2081 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:58,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2081 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:44:58,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2022-11-03 01:44:58,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2628. [2022-11-03 01:44:58,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2628 states, 1912 states have (on average 1.6328451882845187) internal successors, (3122), 1994 states have internal predecessors, (3122), 573 states have call successors, (573), 109 states have call predecessors, (573), 142 states have return successors, (636), 557 states have call predecessors, (636), 568 states have call successors, (636) [2022-11-03 01:44:58,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 4331 transitions. [2022-11-03 01:44:58,393 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 4331 transitions. Word has length 66 [2022-11-03 01:44:58,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:58,394 INFO L495 AbstractCegarLoop]: Abstraction has 2628 states and 4331 transitions. [2022-11-03 01:44:58,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:44:58,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 4331 transitions. [2022-11-03 01:44:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 01:44:58,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:58,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:58,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 01:44:58,397 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:58,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:58,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1876183872, now seen corresponding path program 1 times [2022-11-03 01:44:58,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:58,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882799817] [2022-11-03 01:44:58,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:58,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:58,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:58,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882799817] [2022-11-03 01:44:58,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882799817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:58,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:58,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:44:58,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116787874] [2022-11-03 01:44:58,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:58,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:44:58,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:58,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:44:58,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:44:58,790 INFO L87 Difference]: Start difference. First operand 2628 states and 4331 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 01:45:01,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:01,354 INFO L93 Difference]: Finished difference Result 6390 states and 10527 transitions. [2022-11-03 01:45:01,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:45:01,355 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 70 [2022-11-03 01:45:01,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:01,383 INFO L225 Difference]: With dead ends: 6390 [2022-11-03 01:45:01,383 INFO L226 Difference]: Without dead ends: 4270 [2022-11-03 01:45:01,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:45:01,398 INFO L413 NwaCegarLoop]: 821 mSDtfsCounter, 1958 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1871 mSolverCounterSat, 814 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2106 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 2685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 814 IncrementalHoareTripleChecker+Valid, 1871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:01,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2106 Valid, 1585 Invalid, 2685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [814 Valid, 1871 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 01:45:01,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2022-11-03 01:45:01,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 4162. [2022-11-03 01:45:01,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4162 states, 2970 states have (on average 1.5882154882154882) internal successors, (4717), 3109 states have internal predecessors, (4717), 940 states have call successors, (940), 194 states have call predecessors, (940), 251 states have return successors, (1069), 913 states have call predecessors, (1069), 935 states have call successors, (1069) [2022-11-03 01:45:01,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4162 states to 4162 states and 6726 transitions. [2022-11-03 01:45:01,766 INFO L78 Accepts]: Start accepts. Automaton has 4162 states and 6726 transitions. Word has length 70 [2022-11-03 01:45:01,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:01,767 INFO L495 AbstractCegarLoop]: Abstraction has 4162 states and 6726 transitions. [2022-11-03 01:45:01,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 01:45:01,767 INFO L276 IsEmpty]: Start isEmpty. Operand 4162 states and 6726 transitions. [2022-11-03 01:45:01,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 01:45:01,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:01,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:01,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 01:45:01,770 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:01,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:01,771 INFO L85 PathProgramCache]: Analyzing trace with hash -155730663, now seen corresponding path program 1 times [2022-11-03 01:45:01,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:01,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449367676] [2022-11-03 01:45:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:01,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:02,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:02,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449367676] [2022-11-03 01:45:02,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449367676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:02,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:02,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:45:02,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470972636] [2022-11-03 01:45:02,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:02,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:45:02,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:02,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:45:02,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:45:02,027 INFO L87 Difference]: Start difference. First operand 4162 states and 6726 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:45:02,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:02,731 INFO L93 Difference]: Finished difference Result 8356 states and 13734 transitions. [2022-11-03 01:45:02,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:45:02,732 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 73 [2022-11-03 01:45:02,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:02,766 INFO L225 Difference]: With dead ends: 8356 [2022-11-03 01:45:02,766 INFO L226 Difference]: Without dead ends: 4162 [2022-11-03 01:45:02,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:45:02,789 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 221 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:02,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1972 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:45:02,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4162 states. [2022-11-03 01:45:03,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4162 to 4162. [2022-11-03 01:45:03,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4162 states, 2970 states have (on average 1.5478114478114477) internal successors, (4597), 3109 states have internal predecessors, (4597), 940 states have call successors, (940), 194 states have call predecessors, (940), 251 states have return successors, (1069), 913 states have call predecessors, (1069), 935 states have call successors, (1069) [2022-11-03 01:45:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4162 states to 4162 states and 6606 transitions. [2022-11-03 01:45:03,198 INFO L78 Accepts]: Start accepts. Automaton has 4162 states and 6606 transitions. Word has length 73 [2022-11-03 01:45:03,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:03,199 INFO L495 AbstractCegarLoop]: Abstraction has 4162 states and 6606 transitions. [2022-11-03 01:45:03,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:45:03,199 INFO L276 IsEmpty]: Start isEmpty. Operand 4162 states and 6606 transitions. [2022-11-03 01:45:03,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:45:03,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:03,202 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:03,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 01:45:03,203 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:03,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:03,203 INFO L85 PathProgramCache]: Analyzing trace with hash -863421521, now seen corresponding path program 1 times [2022-11-03 01:45:03,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:03,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503681362] [2022-11-03 01:45:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:03,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:45:03,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:03,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503681362] [2022-11-03 01:45:03,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503681362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:03,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:03,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:45:03,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11687478] [2022-11-03 01:45:03,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:03,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:45:03,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:03,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:45:03,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:45:03,587 INFO L87 Difference]: Start difference. First operand 4162 states and 6606 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 01:45:05,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:05,854 INFO L93 Difference]: Finished difference Result 8247 states and 13118 transitions. [2022-11-03 01:45:05,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:45:05,854 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2022-11-03 01:45:05,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:05,886 INFO L225 Difference]: With dead ends: 8247 [2022-11-03 01:45:05,887 INFO L226 Difference]: Without dead ends: 4707 [2022-11-03 01:45:05,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:45:05,904 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 910 mSDsluCounter, 1306 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 2497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:05,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 1797 Invalid, 2497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 2110 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 01:45:05,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4707 states. [2022-11-03 01:45:06,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4707 to 4252. [2022-11-03 01:45:06,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4252 states, 3030 states have (on average 1.5415841584158416) internal successors, (4671), 3183 states have internal predecessors, (4671), 942 states have call successors, (942), 210 states have call predecessors, (942), 279 states have return successors, (1107), 913 states have call predecessors, (1107), 937 states have call successors, (1107) [2022-11-03 01:45:06,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4252 states to 4252 states and 6720 transitions. [2022-11-03 01:45:06,261 INFO L78 Accepts]: Start accepts. Automaton has 4252 states and 6720 transitions. Word has length 75 [2022-11-03 01:45:06,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:06,261 INFO L495 AbstractCegarLoop]: Abstraction has 4252 states and 6720 transitions. [2022-11-03 01:45:06,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 01:45:06,263 INFO L276 IsEmpty]: Start isEmpty. Operand 4252 states and 6720 transitions. [2022-11-03 01:45:06,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-03 01:45:06,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:06,272 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:06,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 01:45:06,272 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:06,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:06,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1963929867, now seen corresponding path program 1 times [2022-11-03 01:45:06,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:06,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062304561] [2022-11-03 01:45:06,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:06,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:45:06,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:06,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062304561] [2022-11-03 01:45:06,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062304561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:06,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:06,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:45:06,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024904697] [2022-11-03 01:45:06,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:06,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:45:06,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:06,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:45:06,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:45:06,653 INFO L87 Difference]: Start difference. First operand 4252 states and 6720 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 01:45:07,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:07,643 INFO L93 Difference]: Finished difference Result 4354 states and 6888 transitions. [2022-11-03 01:45:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:45:07,644 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2022-11-03 01:45:07,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:07,685 INFO L225 Difference]: With dead ends: 4354 [2022-11-03 01:45:07,686 INFO L226 Difference]: Without dead ends: 4339 [2022-11-03 01:45:07,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:45:07,693 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 644 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:07,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 1704 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:45:07,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2022-11-03 01:45:08,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 4258. [2022-11-03 01:45:08,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4258 states, 3036 states have (on average 1.540513833992095) internal successors, (4677), 3189 states have internal predecessors, (4677), 942 states have call successors, (942), 210 states have call predecessors, (942), 279 states have return successors, (1107), 913 states have call predecessors, (1107), 937 states have call successors, (1107) [2022-11-03 01:45:08,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4258 states to 4258 states and 6726 transitions. [2022-11-03 01:45:08,070 INFO L78 Accepts]: Start accepts. Automaton has 4258 states and 6726 transitions. Word has length 82 [2022-11-03 01:45:08,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:08,071 INFO L495 AbstractCegarLoop]: Abstraction has 4258 states and 6726 transitions. [2022-11-03 01:45:08,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 01:45:08,071 INFO L276 IsEmpty]: Start isEmpty. Operand 4258 states and 6726 transitions. [2022-11-03 01:45:08,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 01:45:08,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:08,074 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:08,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 01:45:08,075 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:08,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:08,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1174039558, now seen corresponding path program 1 times [2022-11-03 01:45:08,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:08,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095703050] [2022-11-03 01:45:08,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:08,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:08,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:45:08,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:08,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095703050] [2022-11-03 01:45:08,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095703050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:08,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:08,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:45:08,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570543379] [2022-11-03 01:45:08,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:08,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:45:08,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:08,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:45:08,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:45:08,459 INFO L87 Difference]: Start difference. First operand 4258 states and 6726 transitions. Second operand has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 01:45:09,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:09,419 INFO L93 Difference]: Finished difference Result 4459 states and 7016 transitions. [2022-11-03 01:45:09,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:45:09,419 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 84 [2022-11-03 01:45:09,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:09,447 INFO L225 Difference]: With dead ends: 4459 [2022-11-03 01:45:09,447 INFO L226 Difference]: Without dead ends: 4444 [2022-11-03 01:45:09,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:45:09,455 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 579 mSDsluCounter, 2148 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 2545 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:09,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 2545 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:45:09,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4444 states. [2022-11-03 01:45:09,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4444 to 4372. [2022-11-03 01:45:09,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4372 states, 3114 states have (on average 1.5343609505459217) internal successors, (4778), 3267 states have internal predecessors, (4778), 966 states have call successors, (966), 222 states have call predecessors, (966), 291 states have return successors, (1148), 937 states have call predecessors, (1148), 961 states have call successors, (1148) [2022-11-03 01:45:09,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 6892 transitions. [2022-11-03 01:45:09,824 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 6892 transitions. Word has length 84 [2022-11-03 01:45:09,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:09,825 INFO L495 AbstractCegarLoop]: Abstraction has 4372 states and 6892 transitions. [2022-11-03 01:45:09,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 01:45:09,826 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 6892 transitions. [2022-11-03 01:45:09,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:45:09,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:09,829 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:45:09,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 01:45:09,829 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:09,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:09,831 INFO L85 PathProgramCache]: Analyzing trace with hash 629855403, now seen corresponding path program 1 times [2022-11-03 01:45:09,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:09,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094068204] [2022-11-03 01:45:09,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:09,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:45:10,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:10,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094068204] [2022-11-03 01:45:10,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094068204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:10,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:10,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:45:10,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947783291] [2022-11-03 01:45:10,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:10,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:45:10,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:10,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:45:10,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:45:10,168 INFO L87 Difference]: Start difference. First operand 4372 states and 6892 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 01:45:12,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:12,070 INFO L93 Difference]: Finished difference Result 11794 states and 18970 transitions. [2022-11-03 01:45:12,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:45:12,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2022-11-03 01:45:12,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:12,124 INFO L225 Difference]: With dead ends: 11794 [2022-11-03 01:45:12,124 INFO L226 Difference]: Without dead ends: 7438 [2022-11-03 01:45:12,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:45:12,149 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 1067 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1131 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:12,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1131 Valid, 915 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 01:45:12,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7438 states. [2022-11-03 01:45:12,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7438 to 6845. [2022-11-03 01:45:12,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6845 states, 4882 states have (on average 1.529291274068005) internal successors, (7466), 5136 states have internal predecessors, (7466), 1494 states have call successors, (1494), 338 states have call predecessors, (1494), 468 states have return successors, (1899), 1445 states have call predecessors, (1899), 1489 states have call successors, (1899) [2022-11-03 01:45:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6845 states to 6845 states and 10859 transitions. [2022-11-03 01:45:12,815 INFO L78 Accepts]: Start accepts. Automaton has 6845 states and 10859 transitions. Word has length 94 [2022-11-03 01:45:12,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:12,816 INFO L495 AbstractCegarLoop]: Abstraction has 6845 states and 10859 transitions. [2022-11-03 01:45:12,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 01:45:12,817 INFO L276 IsEmpty]: Start isEmpty. Operand 6845 states and 10859 transitions. [2022-11-03 01:45:12,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 01:45:12,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:12,821 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:45:12,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 01:45:12,822 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:12,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:12,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1949448161, now seen corresponding path program 1 times [2022-11-03 01:45:12,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:12,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098385772] [2022-11-03 01:45:12,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:12,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:45:13,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:13,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098385772] [2022-11-03 01:45:13,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098385772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:13,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:13,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:45:13,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679988892] [2022-11-03 01:45:13,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:13,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:45:13,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:13,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:45:13,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:45:13,111 INFO L87 Difference]: Start difference. First operand 6845 states and 10859 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 01:45:15,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:15,393 INFO L93 Difference]: Finished difference Result 19151 states and 31340 transitions. [2022-11-03 01:45:15,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:45:15,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 95 [2022-11-03 01:45:15,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:15,473 INFO L225 Difference]: With dead ends: 19151 [2022-11-03 01:45:15,474 INFO L226 Difference]: Without dead ends: 12325 [2022-11-03 01:45:15,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:45:15,507 INFO L413 NwaCegarLoop]: 541 mSDtfsCounter, 1054 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:15,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1117 Valid, 924 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 01:45:15,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12325 states. [2022-11-03 01:45:16,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12325 to 11563. [2022-11-03 01:45:16,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11563 states, 8258 states have (on average 1.5254298861709856) internal successors, (12597), 8739 states have internal predecessors, (12597), 2477 states have call successors, (2477), 570 states have call predecessors, (2477), 827 states have return successors, (3524), 2378 states have call predecessors, (3524), 2472 states have call successors, (3524) [2022-11-03 01:45:16,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11563 states to 11563 states and 18598 transitions. [2022-11-03 01:45:16,870 INFO L78 Accepts]: Start accepts. Automaton has 11563 states and 18598 transitions. Word has length 95 [2022-11-03 01:45:16,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:16,871 INFO L495 AbstractCegarLoop]: Abstraction has 11563 states and 18598 transitions. [2022-11-03 01:45:16,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 01:45:16,871 INFO L276 IsEmpty]: Start isEmpty. Operand 11563 states and 18598 transitions. [2022-11-03 01:45:16,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-03 01:45:16,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:16,875 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:16,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 01:45:16,875 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:16,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:16,876 INFO L85 PathProgramCache]: Analyzing trace with hash 672181211, now seen corresponding path program 1 times [2022-11-03 01:45:16,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:16,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532696221] [2022-11-03 01:45:16,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:16,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:45:17,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:17,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532696221] [2022-11-03 01:45:17,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532696221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:17,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:17,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:45:17,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418628683] [2022-11-03 01:45:17,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:17,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:45:17,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:17,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:45:17,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:45:17,289 INFO L87 Difference]: Start difference. First operand 11563 states and 18598 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:45:20,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:20,021 INFO L93 Difference]: Finished difference Result 33593 states and 56858 transitions. [2022-11-03 01:45:20,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:45:20,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 93 [2022-11-03 01:45:20,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:20,168 INFO L225 Difference]: With dead ends: 33593 [2022-11-03 01:45:20,168 INFO L226 Difference]: Without dead ends: 22055 [2022-11-03 01:45:20,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:45:20,230 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 1047 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:20,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1111 Valid, 933 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 01:45:20,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22055 states. [2022-11-03 01:45:22,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22055 to 20906. [2022-11-03 01:45:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20906 states, 14925 states have (on average 1.5195309882747068) internal successors, (22679), 15890 states have internal predecessors, (22679), 4405 states have call successors, (4405), 1034 states have call predecessors, (4405), 1575 states have return successors, (7444), 4206 states have call predecessors, (7444), 4400 states have call successors, (7444) [2022-11-03 01:45:22,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20906 states to 20906 states and 34528 transitions. [2022-11-03 01:45:22,768 INFO L78 Accepts]: Start accepts. Automaton has 20906 states and 34528 transitions. Word has length 93 [2022-11-03 01:45:22,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:22,769 INFO L495 AbstractCegarLoop]: Abstraction has 20906 states and 34528 transitions. [2022-11-03 01:45:22,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:45:22,769 INFO L276 IsEmpty]: Start isEmpty. Operand 20906 states and 34528 transitions. [2022-11-03 01:45:22,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-03 01:45:22,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:22,772 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:45:22,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 01:45:22,773 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:22,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:22,773 INFO L85 PathProgramCache]: Analyzing trace with hash -817946335, now seen corresponding path program 1 times [2022-11-03 01:45:22,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:22,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445651600] [2022-11-03 01:45:22,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:22,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:45:23,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:23,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445651600] [2022-11-03 01:45:23,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445651600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:23,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:23,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:45:23,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344050775] [2022-11-03 01:45:23,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:23,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:45:23,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:23,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:45:23,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:45:23,026 INFO L87 Difference]: Start difference. First operand 20906 states and 34528 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 01:45:28,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:28,333 INFO L93 Difference]: Finished difference Result 62210 states and 111629 transitions. [2022-11-03 01:45:28,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:45:28,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 97 [2022-11-03 01:45:28,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:28,620 INFO L225 Difference]: With dead ends: 62210 [2022-11-03 01:45:28,620 INFO L226 Difference]: Without dead ends: 41341 [2022-11-03 01:45:28,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:45:28,758 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 1028 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1089 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:28,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1089 Valid, 945 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 01:45:28,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41341 states. [2022-11-03 01:45:33,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41341 to 39369. [2022-11-03 01:45:33,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39369 states, 28064 states have (on average 1.5120082668187) internal successors, (42433), 30057 states have internal predecessors, (42433), 8173 states have call successors, (8173), 1962 states have call predecessors, (8173), 3131 states have return successors, (17560), 7774 states have call predecessors, (17560), 8168 states have call successors, (17560) [2022-11-03 01:45:33,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39369 states to 39369 states and 68166 transitions. [2022-11-03 01:45:33,429 INFO L78 Accepts]: Start accepts. Automaton has 39369 states and 68166 transitions. Word has length 97 [2022-11-03 01:45:33,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:33,430 INFO L495 AbstractCegarLoop]: Abstraction has 39369 states and 68166 transitions. [2022-11-03 01:45:33,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 01:45:33,431 INFO L276 IsEmpty]: Start isEmpty. Operand 39369 states and 68166 transitions. [2022-11-03 01:45:33,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 01:45:33,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:33,435 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:33,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 01:45:33,436 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:33,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:33,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1717169693, now seen corresponding path program 1 times [2022-11-03 01:45:33,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:33,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922381039] [2022-11-03 01:45:33,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:33,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:45:34,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:34,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922381039] [2022-11-03 01:45:34,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922381039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:34,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:34,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:45:34,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248814656] [2022-11-03 01:45:34,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:34,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:45:34,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:34,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:45:34,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:45:34,072 INFO L87 Difference]: Start difference. First operand 39369 states and 68166 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:45:42,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:42,775 INFO L93 Difference]: Finished difference Result 119110 states and 235238 transitions. [2022-11-03 01:45:42,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:45:42,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 95 [2022-11-03 01:45:42,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:43,602 INFO L225 Difference]: With dead ends: 119110 [2022-11-03 01:45:43,602 INFO L226 Difference]: Without dead ends: 79792 [2022-11-03 01:45:44,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:45:44,003 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 1044 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:44,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1106 Valid, 937 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 01:45:44,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79792 states.