./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/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_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7 --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 --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:50:43,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:50:43,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:50:44,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:50:44,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:50:44,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:50:44,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:50:44,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:50:44,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:50:44,062 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:50:44,064 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:50:44,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:50:44,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:50:44,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:50:44,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:50:44,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:50:44,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:50:44,089 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:50:44,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:50:44,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:50:44,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:50:44,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:50:44,108 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:50:44,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:50:44,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:50:44,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:50:44,122 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:50:44,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:50:44,126 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:50:44,128 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:50:44,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:50:44,130 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:50:44,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:50:44,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:50:44,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:50:44,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:50:44,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:50:44,138 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:50:44,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:50:44,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:50:44,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:50:44,142 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:50:44,202 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:50:44,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:50:44,203 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:50:44,204 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:50:44,205 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:50:44,205 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:50:44,205 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:50:44,206 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:50:44,206 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:50:44,206 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:50:44,208 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:50:44,208 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:50:44,208 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:50:44,209 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:50:44,209 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:50:44,209 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:50:44,210 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:50:44,210 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:50:44,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:50:44,211 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:50:44,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:50:44,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:50:44,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:50:44,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:50:44,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:50:44,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:50:44,214 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:50:44,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:50:44,215 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:50:44,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:50:44,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:50:44,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:50:44,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:50:44,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:50:44,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:50:44,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:50:44,217 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:50:44,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:50:44,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:50:44,218 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:50:44,218 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:50:44,219 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d9d31939acfea5ee9b43b1f06257671943c7251c27c351c5e445aa6495fd098 [2021-11-25 19:50:44,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:50:44,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:50:44,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:50:44,695 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:50:44,696 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:50:44,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c [2021-11-25 19:50:44,795 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/data/6657a0c1e/180a2c81215c4dc2bf6e1b9431e4bc7b/FLAGbbdfa25ae [2021-11-25 19:50:45,545 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:50:45,546 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c [2021-11-25 19:50:45,573 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/data/6657a0c1e/180a2c81215c4dc2bf6e1b9431e4bc7b/FLAGbbdfa25ae [2021-11-25 19:50:45,693 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/data/6657a0c1e/180a2c81215c4dc2bf6e1b9431e4bc7b [2021-11-25 19:50:45,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:50:45,698 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:50:45,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:50:45,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:50:45,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:50:45,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:50:45" (1/1) ... [2021-11-25 19:50:45,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68a88a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:50:45, skipping insertion in model container [2021-11-25 19:50:45,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:50:45" (1/1) ... [2021-11-25 19:50:45,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:50:45,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:50:46,312 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_099b6c2e-5195-4f21-ac4f-f594c62b3373/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c[38051,38064] [2021-11-25 19:50:46,547 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:50:46,559 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:50:46,680 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_099b6c2e-5195-4f21-ac4f-f594c62b3373/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c[38051,38064] [2021-11-25 19:50:46,718 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:50:46,763 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:50:46,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:50:46 WrapperNode [2021-11-25 19:50:46,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:50:46,765 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:50:46,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:50:46,765 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:50:46,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:50:46" (1/1) ... [2021-11-25 19:50:46,818 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:50:46" (1/1) ... [2021-11-25 19:50:46,886 INFO L137 Inliner]: procedures = 92, calls = 338, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 817 [2021-11-25 19:50:46,887 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:50:46,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:50:46,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:50:46,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:50:46,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:50:46" (1/1) ... [2021-11-25 19:50:46,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:50:46" (1/1) ... [2021-11-25 19:50:46,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:50:46" (1/1) ... [2021-11-25 19:50:46,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:50:46" (1/1) ... [2021-11-25 19:50:46,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:50:46" (1/1) ... [2021-11-25 19:50:47,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:50:46" (1/1) ... [2021-11-25 19:50:47,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:50:46" (1/1) ... [2021-11-25 19:50:47,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:50:47,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:50:47,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:50:47,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:50:47,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:50:46" (1/1) ... [2021-11-25 19:50:47,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:50:47,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:47,110 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:50:47,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:50:47,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:50:47,164 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-25 19:50:47,164 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-25 19:50:47,164 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-25 19:50:47,164 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-25 19:50:47,164 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 19:50:47,165 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 19:50:47,165 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 19:50:47,165 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 19:50:47,165 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 19:50:47,165 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 19:50:47,165 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 19:50:47,165 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 19:50:47,165 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 19:50:47,166 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 19:50:47,166 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-25 19:50:47,166 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-25 19:50:47,166 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-25 19:50:47,166 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-25 19:50:47,166 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 19:50:47,166 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 19:50:47,167 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 19:50:47,167 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 19:50:47,167 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 19:50:47,167 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 19:50:47,167 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 19:50:47,167 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 19:50:47,167 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 19:50:47,167 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 19:50:47,168 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 19:50:47,168 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 19:50:47,168 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 19:50:47,168 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 19:50:47,168 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 19:50:47,168 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 19:50:47,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:50:47,169 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2021-11-25 19:50:47,169 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2021-11-25 19:50:47,169 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 19:50:47,169 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 19:50:47,169 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 19:50:47,169 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 19:50:47,169 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 19:50:47,170 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 19:50:47,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:50:47,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:50:47,171 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 19:50:47,172 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 19:50:47,410 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:50:47,412 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:50:48,598 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:50:49,437 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:50:49,437 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:50:49,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:50:49 BoogieIcfgContainer [2021-11-25 19:50:49,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:50:49,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:50:49,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:50:49,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:50:49,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:50:45" (1/3) ... [2021-11-25 19:50:49,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a63c4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:50:49, skipping insertion in model container [2021-11-25 19:50:49,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:50:46" (2/3) ... [2021-11-25 19:50:49,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a63c4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:50:49, skipping insertion in model container [2021-11-25 19:50:49,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:50:49" (3/3) ... [2021-11-25 19:50:49,458 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product18.cil.c [2021-11-25 19:50:49,465 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:50:49,466 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:50:49,550 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:50:49,563 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:50:49,563 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:50:49,606 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) [2021-11-25 19:50:49,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 19:50:49,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:49,634 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:50:49,634 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:49,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:49,642 INFO L85 PathProgramCache]: Analyzing trace with hash 2110685333, now seen corresponding path program 1 times [2021-11-25 19:50:49,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:50:49,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622348973] [2021-11-25 19:50:49,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:49,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:50:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:50,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:50:50,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622348973] [2021-11-25 19:50:50,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622348973] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:50,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:50,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:50:50,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311221411] [2021-11-25 19:50:50,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:50,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 19:50:50,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:50:50,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 19:50:50,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:50:50,302 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) [2021-11-25 19:50:50,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:50,570 INFO L93 Difference]: Finished difference Result 374 states and 599 transitions. [2021-11-25 19:50:50,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 19:50:50,575 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 [2021-11-25 19:50:50,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:50,607 INFO L225 Difference]: With dead ends: 374 [2021-11-25 19:50:50,607 INFO L226 Difference]: Without dead ends: 352 [2021-11-25 19:50:50,615 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:50:50,621 INFO L933 BasicCegarLoop]: 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, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:50,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 530 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:50:50,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-25 19:50:50,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2021-11-25 19:50:50,727 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) [2021-11-25 19:50:50,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 561 transitions. [2021-11-25 19:50:50,739 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 561 transitions. Word has length 39 [2021-11-25 19:50:50,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:50,741 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 561 transitions. [2021-11-25 19:50:50,741 INFO L471 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) [2021-11-25 19:50:50,741 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 561 transitions. [2021-11-25 19:50:50,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 19:50:50,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:50,749 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:50:50,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:50:50,749 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:50,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:50,750 INFO L85 PathProgramCache]: Analyzing trace with hash 774255056, now seen corresponding path program 1 times [2021-11-25 19:50:50,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:50:50,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632983773] [2021-11-25 19:50:50,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:50,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:50:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:51,161 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:50:51,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632983773] [2021-11-25 19:50:51,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632983773] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:51,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:51,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:50:51,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023890007] [2021-11-25 19:50:51,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:51,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:50:51,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:50:51,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:50:51,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:50:51,166 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) [2021-11-25 19:50:53,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:53,467 INFO L93 Difference]: Finished difference Result 1156 states and 1884 transitions. [2021-11-25 19:50:53,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:50:53,469 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 [2021-11-25 19:50:53,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:53,480 INFO L225 Difference]: With dead ends: 1156 [2021-11-25 19:50:53,481 INFO L226 Difference]: Without dead ends: 820 [2021-11-25 19:50:53,493 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:50:53,496 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 1150 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:53,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1210 Valid, 1327 Invalid, 1706 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [424 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-25 19:50:53,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-11-25 19:50:53,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 733. [2021-11-25 19:50:53,622 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) [2021-11-25 19:50:53,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1200 transitions. [2021-11-25 19:50:53,633 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1200 transitions. Word has length 40 [2021-11-25 19:50:53,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:53,635 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 1200 transitions. [2021-11-25 19:50:53,635 INFO L471 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) [2021-11-25 19:50:53,636 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1200 transitions. [2021-11-25 19:50:53,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 19:50:53,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:53,649 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:50:53,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:50:53,649 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:53,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:53,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1589422790, now seen corresponding path program 1 times [2021-11-25 19:50:53,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:50:53,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926438268] [2021-11-25 19:50:53,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:53,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:50:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:53,858 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:50:53,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926438268] [2021-11-25 19:50:53,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926438268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:53,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:53,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 19:50:53,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071747023] [2021-11-25 19:50:53,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:53,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:50:53,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:50:53,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:50:53,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:50:53,862 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) [2021-11-25 19:50:57,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:57,259 INFO L93 Difference]: Finished difference Result 2155 states and 3549 transitions. [2021-11-25 19:50:57,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 19:50:57,261 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 [2021-11-25 19:50:57,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:57,277 INFO L225 Difference]: With dead ends: 2155 [2021-11-25 19:50:57,277 INFO L226 Difference]: Without dead ends: 1438 [2021-11-25 19:50:57,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-11-25 19:50:57,286 INFO L933 BasicCegarLoop]: 920 mSDtfsCounter, 913 mSDsluCounter, 2280 mSDsCounter, 0 mSdLazyCounter, 4230 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 3055 SdHoareTripleChecker+Invalid, 4578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 4230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:57,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [980 Valid, 3055 Invalid, 4578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 4230 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-25 19:50:57,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-11-25 19:50:57,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1420. [2021-11-25 19:50:57,400 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) [2021-11-25 19:50:57,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 2337 transitions. [2021-11-25 19:50:57,421 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 2337 transitions. Word has length 61 [2021-11-25 19:50:57,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:57,421 INFO L470 AbstractCegarLoop]: Abstraction has 1420 states and 2337 transitions. [2021-11-25 19:50:57,422 INFO L471 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) [2021-11-25 19:50:57,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 2337 transitions. [2021-11-25 19:50:57,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 19:50:57,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:57,426 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:50:57,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:50:57,426 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:57,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:57,427 INFO L85 PathProgramCache]: Analyzing trace with hash -19981388, now seen corresponding path program 1 times [2021-11-25 19:50:57,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:50:57,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304467936] [2021-11-25 19:50:57,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:57,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:50:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:57,621 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:50:57,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304467936] [2021-11-25 19:50:57,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304467936] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:57,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:57,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:50:57,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727910203] [2021-11-25 19:50:57,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:57,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:50:57,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:50:57,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:50:57,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:50:57,624 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) [2021-11-25 19:50:59,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:59,950 INFO L93 Difference]: Finished difference Result 4101 states and 6770 transitions. [2021-11-25 19:50:59,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 19:50:59,951 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 [2021-11-25 19:50:59,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:59,977 INFO L225 Difference]: With dead ends: 4101 [2021-11-25 19:50:59,977 INFO L226 Difference]: Without dead ends: 2699 [2021-11-25 19:50:59,987 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:50:59,989 INFO L933 BasicCegarLoop]: 743 mSDtfsCounter, 1633 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 2071 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1696 SdHoareTripleChecker+Valid, 2156 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 2071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:59,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1696 Valid, 2156 Invalid, 2588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 2071 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-25 19:50:59,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2021-11-25 19:51:00,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2588. [2021-11-25 19:51:00,263 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) [2021-11-25 19:51:00,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2588 states to 2588 states and 4281 transitions. [2021-11-25 19:51:00,291 INFO L78 Accepts]: Start accepts. Automaton has 2588 states and 4281 transitions. Word has length 62 [2021-11-25 19:51:00,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:00,294 INFO L470 AbstractCegarLoop]: Abstraction has 2588 states and 4281 transitions. [2021-11-25 19:51:00,295 INFO L471 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) [2021-11-25 19:51:00,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2588 states and 4281 transitions. [2021-11-25 19:51:00,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-25 19:51:00,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:00,307 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:51:00,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:51:00,308 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:51:00,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:00,312 INFO L85 PathProgramCache]: Analyzing trace with hash -224222184, now seen corresponding path program 1 times [2021-11-25 19:51:00,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:51:00,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879633780] [2021-11-25 19:51:00,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:00,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:51:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:00,492 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:51:00,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879633780] [2021-11-25 19:51:00,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879633780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:00,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:51:00,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:51:00,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836199517] [2021-11-25 19:51:00,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:00,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:51:00,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:51:00,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:51:00,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:51:00,499 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) [2021-11-25 19:51:00,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:00,837 INFO L93 Difference]: Finished difference Result 4540 states and 7514 transitions. [2021-11-25 19:51:00,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:51:00,839 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 [2021-11-25 19:51:00,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:00,870 INFO L225 Difference]: With dead ends: 4540 [2021-11-25 19:51:00,871 INFO L226 Difference]: Without dead ends: 2652 [2021-11-25 19:51:00,883 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:51:00,888 INFO L933 BasicCegarLoop]: 529 mSDtfsCounter, 7 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2083 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:00,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2083 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:51:00,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-11-25 19:51:01,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2628. [2021-11-25 19:51:01,195 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) [2021-11-25 19:51:01,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 4331 transitions. [2021-11-25 19:51:01,225 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 4331 transitions. Word has length 66 [2021-11-25 19:51:01,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:01,225 INFO L470 AbstractCegarLoop]: Abstraction has 2628 states and 4331 transitions. [2021-11-25 19:51:01,226 INFO L471 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) [2021-11-25 19:51:01,226 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 4331 transitions. [2021-11-25 19:51:01,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 19:51:01,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:01,230 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:51:01,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:51:01,231 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:51:01,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:01,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1876183872, now seen corresponding path program 1 times [2021-11-25 19:51:01,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:51:01,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829381344] [2021-11-25 19:51:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:01,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:51:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:01,494 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:51:01,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829381344] [2021-11-25 19:51:01,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829381344] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:01,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:51:01,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 19:51:01,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854688299] [2021-11-25 19:51:01,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:01,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:51:01,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:51:01,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:51:01,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:51:01,498 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) [2021-11-25 19:51:04,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:04,035 INFO L93 Difference]: Finished difference Result 6390 states and 10527 transitions. [2021-11-25 19:51:04,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:51:04,036 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 [2021-11-25 19:51:04,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:04,078 INFO L225 Difference]: With dead ends: 6390 [2021-11-25 19:51:04,079 INFO L226 Difference]: Without dead ends: 4270 [2021-11-25 19:51:04,095 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:51:04,097 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 1958 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 814 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2106 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 2674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 814 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:04,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2106 Valid, 1596 Invalid, 2674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [814 Valid, 1860 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-25 19:51:04,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2021-11-25 19:51:04,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 4162. [2021-11-25 19:51:04,382 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) [2021-11-25 19:51:04,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4162 states to 4162 states and 6726 transitions. [2021-11-25 19:51:04,407 INFO L78 Accepts]: Start accepts. Automaton has 4162 states and 6726 transitions. Word has length 70 [2021-11-25 19:51:04,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:04,408 INFO L470 AbstractCegarLoop]: Abstraction has 4162 states and 6726 transitions. [2021-11-25 19:51:04,408 INFO L471 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) [2021-11-25 19:51:04,408 INFO L276 IsEmpty]: Start isEmpty. Operand 4162 states and 6726 transitions. [2021-11-25 19:51:04,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 19:51:04,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:04,448 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:51:04,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:51:04,448 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:51:04,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:04,449 INFO L85 PathProgramCache]: Analyzing trace with hash -155730663, now seen corresponding path program 1 times [2021-11-25 19:51:04,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:51:04,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116989721] [2021-11-25 19:51:04,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:04,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:51:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:04,570 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:51:04,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116989721] [2021-11-25 19:51:04,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116989721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:04,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:51:04,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:51:04,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505118352] [2021-11-25 19:51:04,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:04,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:51:04,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:51:04,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:51:04,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:51:04,573 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) [2021-11-25 19:51:05,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:05,016 INFO L93 Difference]: Finished difference Result 8356 states and 13734 transitions. [2021-11-25 19:51:05,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:51:05,017 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 [2021-11-25 19:51:05,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:05,057 INFO L225 Difference]: With dead ends: 8356 [2021-11-25 19:51:05,057 INFO L226 Difference]: Without dead ends: 4162 [2021-11-25 19:51:05,086 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:51:05,089 INFO L933 BasicCegarLoop]: 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 [2021-11-25 19:51:05,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 1972 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:51:05,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4162 states. [2021-11-25 19:51:05,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4162 to 4162. [2021-11-25 19:51:05,372 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) [2021-11-25 19:51:05,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4162 states to 4162 states and 6606 transitions. [2021-11-25 19:51:05,396 INFO L78 Accepts]: Start accepts. Automaton has 4162 states and 6606 transitions. Word has length 73 [2021-11-25 19:51:05,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:05,398 INFO L470 AbstractCegarLoop]: Abstraction has 4162 states and 6606 transitions. [2021-11-25 19:51:05,398 INFO L471 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) [2021-11-25 19:51:05,399 INFO L276 IsEmpty]: Start isEmpty. Operand 4162 states and 6606 transitions. [2021-11-25 19:51:05,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-25 19:51:05,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:05,402 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:51:05,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:51:05,403 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:51:05,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:05,404 INFO L85 PathProgramCache]: Analyzing trace with hash -863421521, now seen corresponding path program 1 times [2021-11-25 19:51:05,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:51:05,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498647677] [2021-11-25 19:51:05,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:05,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:51:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:51:05,545 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:51:05,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498647677] [2021-11-25 19:51:05,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498647677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:05,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:51:05,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:51:05,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049977726] [2021-11-25 19:51:05,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:05,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:51:05,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:51:05,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:51:05,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:51:05,548 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) [2021-11-25 19:51:07,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:07,761 INFO L93 Difference]: Finished difference Result 8247 states and 13118 transitions. [2021-11-25 19:51:07,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:51:07,762 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 [2021-11-25 19:51:07,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:07,809 INFO L225 Difference]: With dead ends: 8247 [2021-11-25 19:51:07,809 INFO L226 Difference]: Without dead ends: 4707 [2021-11-25 19:51:07,833 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:51:07,834 INFO L933 BasicCegarLoop]: 583 mSDtfsCounter, 910 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 2072 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 1835 SdHoareTripleChecker+Invalid, 2459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 2072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:07,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [980 Valid, 1835 Invalid, 2459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 2072 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-25 19:51:07,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4707 states. [2021-11-25 19:51:08,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4707 to 4252. [2021-11-25 19:51:08,192 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) [2021-11-25 19:51:08,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4252 states to 4252 states and 6720 transitions. [2021-11-25 19:51:08,225 INFO L78 Accepts]: Start accepts. Automaton has 4252 states and 6720 transitions. Word has length 75 [2021-11-25 19:51:08,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:08,226 INFO L470 AbstractCegarLoop]: Abstraction has 4252 states and 6720 transitions. [2021-11-25 19:51:08,227 INFO L471 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) [2021-11-25 19:51:08,227 INFO L276 IsEmpty]: Start isEmpty. Operand 4252 states and 6720 transitions. [2021-11-25 19:51:08,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-25 19:51:08,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:08,231 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:51:08,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 19:51:08,232 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:51:08,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:08,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1963929867, now seen corresponding path program 1 times [2021-11-25 19:51:08,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:51:08,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035475220] [2021-11-25 19:51:08,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:08,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:51:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:08,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:51:08,365 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:51:08,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035475220] [2021-11-25 19:51:08,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035475220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:08,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:51:08,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:51:08,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512962259] [2021-11-25 19:51:08,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:08,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:51:08,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:51:08,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:51:08,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:51:08,368 INFO L87 Difference]: Start difference. First operand 4252 states and 6720 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 19:51:10,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:10,065 INFO L93 Difference]: Finished difference Result 11351 states and 18208 transitions. [2021-11-25 19:51:10,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:51:10,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 82 [2021-11-25 19:51:10,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:10,149 INFO L225 Difference]: With dead ends: 11351 [2021-11-25 19:51:10,149 INFO L226 Difference]: Without dead ends: 7115 [2021-11-25 19:51:10,183 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:51:10,186 INFO L933 BasicCegarLoop]: 527 mSDtfsCounter, 1074 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:10,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1138 Valid, 913 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 19:51:10,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7115 states. [2021-11-25 19:51:10,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7115 to 6603. [2021-11-25 19:51:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6603 states, 4715 states have (on average 1.537221633085896) internal successors, (7248), 4966 states have internal predecessors, (7248), 1446 states have call successors, (1446), 314 states have call predecessors, (1446), 441 states have return successors, (1777), 1397 states have call predecessors, (1777), 1441 states have call successors, (1777) [2021-11-25 19:51:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6603 states to 6603 states and 10471 transitions. [2021-11-25 19:51:10,681 INFO L78 Accepts]: Start accepts. Automaton has 6603 states and 10471 transitions. Word has length 82 [2021-11-25 19:51:10,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:10,682 INFO L470 AbstractCegarLoop]: Abstraction has 6603 states and 10471 transitions. [2021-11-25 19:51:10,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 19:51:10,683 INFO L276 IsEmpty]: Start isEmpty. Operand 6603 states and 10471 transitions. [2021-11-25 19:51:10,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-25 19:51:10,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:10,686 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:51:10,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 19:51:10,686 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:51:10,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:10,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1138425113, now seen corresponding path program 1 times [2021-11-25 19:51:10,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:51:10,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246566792] [2021-11-25 19:51:10,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:10,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:51:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:51:10,815 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:51:10,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246566792] [2021-11-25 19:51:10,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246566792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:10,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:51:10,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:51:10,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76275037] [2021-11-25 19:51:10,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:10,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:51:10,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:51:10,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:51:10,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:51:10,818 INFO L87 Difference]: Start difference. First operand 6603 states and 10471 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 19:51:12,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:12,540 INFO L93 Difference]: Finished difference Result 18257 states and 29561 transitions. [2021-11-25 19:51:12,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:51:12,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 80 [2021-11-25 19:51:12,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:12,632 INFO L225 Difference]: With dead ends: 18257 [2021-11-25 19:51:12,632 INFO L226 Difference]: Without dead ends: 11671 [2021-11-25 19:51:12,668 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:51:12,668 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 1067 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:12,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1132 Valid, 922 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 19:51:12,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11671 states. [2021-11-25 19:51:13,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11671 to 11071. [2021-11-25 19:51:13,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11071 states, 7922 states have (on average 1.5342085331986872) internal successors, (12154), 8391 states have internal predecessors, (12154), 2381 states have call successors, (2381), 522 states have call predecessors, (2381), 767 states have return successors, (3154), 2282 states have call predecessors, (3154), 2376 states have call successors, (3154) [2021-11-25 19:51:13,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11071 states to 11071 states and 17689 transitions. [2021-11-25 19:51:13,546 INFO L78 Accepts]: Start accepts. Automaton has 11071 states and 17689 transitions. Word has length 80 [2021-11-25 19:51:13,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:13,547 INFO L470 AbstractCegarLoop]: Abstraction has 11071 states and 17689 transitions. [2021-11-25 19:51:13,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 19:51:13,548 INFO L276 IsEmpty]: Start isEmpty. Operand 11071 states and 17689 transitions. [2021-11-25 19:51:13,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-25 19:51:13,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:13,552 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:51:13,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 19:51:13,552 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:51:13,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:13,553 INFO L85 PathProgramCache]: Analyzing trace with hash -931565403, now seen corresponding path program 1 times [2021-11-25 19:51:13,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:51:13,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109803872] [2021-11-25 19:51:13,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:13,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:51:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:51:13,699 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:51:13,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109803872] [2021-11-25 19:51:13,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109803872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:13,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:51:13,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:51:13,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687598855] [2021-11-25 19:51:13,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:13,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:51:13,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:51:13,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:51:13,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:51:13,703 INFO L87 Difference]: Start difference. First operand 11071 states and 17689 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 19:51:15,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:15,674 INFO L93 Difference]: Finished difference Result 31779 states and 52502 transitions. [2021-11-25 19:51:15,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:51:15,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 81 [2021-11-25 19:51:15,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:15,830 INFO L225 Difference]: With dead ends: 31779 [2021-11-25 19:51:15,831 INFO L226 Difference]: Without dead ends: 20727 [2021-11-25 19:51:15,893 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:51:15,894 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 1054 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:15,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1118 Valid, 931 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 19:51:15,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20727 states. [2021-11-25 19:51:17,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20727 to 19902. [2021-11-25 19:51:17,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19902 states, 14245 states have (on average 1.528957528957529) internal successors, (21780), 15174 states have internal predecessors, (21780), 4213 states have call successors, (4213), 938 states have call predecessors, (4213), 1443 states have return successors, (6302), 4014 states have call predecessors, (6302), 4208 states have call successors, (6302) [2021-11-25 19:51:17,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19902 states to 19902 states and 32295 transitions. [2021-11-25 19:51:17,746 INFO L78 Accepts]: Start accepts. Automaton has 19902 states and 32295 transitions. Word has length 81 [2021-11-25 19:51:17,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:17,747 INFO L470 AbstractCegarLoop]: Abstraction has 19902 states and 32295 transitions. [2021-11-25 19:51:17,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 19:51:17,747 INFO L276 IsEmpty]: Start isEmpty. Operand 19902 states and 32295 transitions. [2021-11-25 19:51:17,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-25 19:51:17,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:17,752 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:17,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 19:51:17,753 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:51:17,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:17,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1518302569, now seen corresponding path program 1 times [2021-11-25 19:51:17,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:51:17,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461859121] [2021-11-25 19:51:17,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:17,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:51:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:51:17,887 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:51:17,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461859121] [2021-11-25 19:51:17,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461859121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:17,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:51:17,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:51:17,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947000283] [2021-11-25 19:51:17,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:17,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:51:17,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:51:17,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:51:17,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:51:17,890 INFO L87 Difference]: Start difference. First operand 19902 states and 32295 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 19:51:21,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:21,431 INFO L93 Difference]: Finished difference Result 58520 states and 100373 transitions. [2021-11-25 19:51:21,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:51:21,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 85 [2021-11-25 19:51:21,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:21,896 INFO L225 Difference]: With dead ends: 58520 [2021-11-25 19:51:21,896 INFO L226 Difference]: Without dead ends: 38641 [2021-11-25 19:51:22,004 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:51:22,006 INFO L933 BasicCegarLoop]: 563 mSDtfsCounter, 1035 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:22,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1096 Valid, 943 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 19:51:22,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38641 states. [2021-11-25 19:51:24,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38641 to 37317. [2021-11-25 19:51:24,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37317 states, 26684 states have (on average 1.5218857742467395) internal successors, (40610), 28581 states have internal predecessors, (40610), 7789 states have call successors, (7789), 1770 states have call predecessors, (7789), 2843 states have return successors, (13974), 7390 states have call predecessors, (13974), 7784 states have call successors, (13974) [2021-11-25 19:51:25,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37317 states to 37317 states and 62373 transitions. [2021-11-25 19:51:25,170 INFO L78 Accepts]: Start accepts. Automaton has 37317 states and 62373 transitions. Word has length 85 [2021-11-25 19:51:25,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:25,170 INFO L470 AbstractCegarLoop]: Abstraction has 37317 states and 62373 transitions. [2021-11-25 19:51:25,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 19:51:25,171 INFO L276 IsEmpty]: Start isEmpty. Operand 37317 states and 62373 transitions. [2021-11-25 19:51:25,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-25 19:51:25,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:25,176 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:25,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 19:51:25,176 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:51:25,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:25,177 INFO L85 PathProgramCache]: Analyzing trace with hash 177143161, now seen corresponding path program 1 times [2021-11-25 19:51:25,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:51:25,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307816329] [2021-11-25 19:51:25,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:25,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:51:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:51:25,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:51:25,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307816329] [2021-11-25 19:51:25,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307816329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:25,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:51:25,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:51:25,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787558722] [2021-11-25 19:51:25,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:25,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:51:25,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:51:25,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:51:25,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:51:25,315 INFO L87 Difference]: Start difference. First operand 37317 states and 62373 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 19:51:30,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:30,888 INFO L93 Difference]: Finished difference Result 111644 states and 204506 transitions. [2021-11-25 19:51:30,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:51:30,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2021-11-25 19:51:30,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:31,771 INFO L225 Difference]: With dead ends: 111644 [2021-11-25 19:51:31,772 INFO L226 Difference]: Without dead ends: 74348 [2021-11-25 19:51:32,116 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:51:32,118 INFO L933 BasicCegarLoop]: 553 mSDtfsCounter, 1044 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 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, 1.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:32,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1104 Valid, 937 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-25 19:51:32,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74348 states. [2021-11-25 19:51:37,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74348 to 71291. [2021-11-25 19:51:37,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71291 states, 51003 states have (on average 1.5176754308570084) internal successors, (77406), 54740 states have internal predecessors, (77406), 14748 states have call successors, (14748), 3427 states have call predecessors, (14748), 5539 states have return successors, (32406), 13951 states have call predecessors, (32406), 14743 states have call successors, (32406) [2021-11-25 19:51:38,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71291 states to 71291 states and 124560 transitions. [2021-11-25 19:51:38,134 INFO L78 Accepts]: Start accepts. Automaton has 71291 states and 124560 transitions. Word has length 86 [2021-11-25 19:51:38,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:38,134 INFO L470 AbstractCegarLoop]: Abstraction has 71291 states and 124560 transitions. [2021-11-25 19:51:38,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 19:51:38,135 INFO L276 IsEmpty]: Start isEmpty. Operand 71291 states and 124560 transitions. [2021-11-25 19:51:38,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-25 19:51:38,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:38,147 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:38,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 19:51:38,148 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:51:38,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:38,149 INFO L85 PathProgramCache]: Analyzing trace with hash -929417357, now seen corresponding path program 1 times [2021-11-25 19:51:38,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:51:38,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944248788] [2021-11-25 19:51:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:38,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:51:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-25 19:51:38,317 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:51:38,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944248788] [2021-11-25 19:51:38,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944248788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:51:38,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357810607] [2021-11-25 19:51:38,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:38,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:51:38,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:51:38,320 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:51:38,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:51:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:39,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 2018 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:51:39,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-25 19:51:39,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:51:39,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357810607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:39,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:51:39,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-25 19:51:39,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092504391] [2021-11-25 19:51:39,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:39,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:51:39,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:51:39,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:51:39,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:51:39,552 INFO L87 Difference]: Start difference. First operand 71291 states and 124560 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 19:51:44,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:44,852 INFO L93 Difference]: Finished difference Result 146426 states and 268484 transitions. [2021-11-25 19:51:44,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:51:44,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 129 [2021-11-25 19:51:44,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:45,345 INFO L225 Difference]: With dead ends: 146426 [2021-11-25 19:51:45,346 INFO L226 Difference]: Without dead ends: 75152 [2021-11-25 19:51:45,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:51:45,751 INFO L933 BasicCegarLoop]: 451 mSDtfsCounter, 213 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:45,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1329 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:51:45,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75152 states. [2021-11-25 19:51:51,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75152 to 75152. [2021-11-25 19:51:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75152 states, 54765 states have (on average 1.545384826075048) internal successors, (84633), 58502 states have internal predecessors, (84633), 14748 states have call successors, (14748), 3526 states have call predecessors, (14748), 5638 states have return successors, (32406), 13951 states have call predecessors, (32406), 14743 states have call successors, (32406) [2021-11-25 19:51:51,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75152 states to 75152 states and 131787 transitions. [2021-11-25 19:51:51,706 INFO L78 Accepts]: Start accepts. Automaton has 75152 states and 131787 transitions. Word has length 129 [2021-11-25 19:51:51,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:51,706 INFO L470 AbstractCegarLoop]: Abstraction has 75152 states and 131787 transitions. [2021-11-25 19:51:51,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 19:51:51,707 INFO L276 IsEmpty]: Start isEmpty. Operand 75152 states and 131787 transitions. [2021-11-25 19:51:51,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-25 19:51:51,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:51,722 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:51,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 19:51:51,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 19:51:51,937 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:51:51,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:51,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1083446538, now seen corresponding path program 1 times [2021-11-25 19:51:51,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:51:51,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414985244] [2021-11-25 19:51:51,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:51,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:51:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-25 19:51:52,099 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:51:52,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414985244] [2021-11-25 19:51:52,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414985244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:51:52,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27569244] [2021-11-25 19:51:52,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:52,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:51:52,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:51:52,105 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:51:52,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099b6c2e-5195-4f21-ac4f-f594c62b3373/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:51:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:52,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 2023 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:51:52,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 19:51:53,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:51:53,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27569244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:53,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:51:53,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 19:51:53,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924515720] [2021-11-25 19:51:53,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:53,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:51:53,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:51:53,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:51:53,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:51:53,312 INFO L87 Difference]: Start difference. First operand 75152 states and 131787 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 19:51:57,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:57,986 INFO L93 Difference]: Finished difference Result 154148 states and 282608 transitions. [2021-11-25 19:51:57,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:51:57,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 134 [2021-11-25 19:51:57,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:58,682 INFO L225 Difference]: With dead ends: 154148 [2021-11-25 19:51:58,682 INFO L226 Difference]: Without dead ends: 79013 [2021-11-25 19:51:58,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:51:58,978 INFO L933 BasicCegarLoop]: 451 mSDtfsCounter, 211 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:58,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1329 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:51:59,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79013 states.