./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V --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 11bb1f05736dca729c358ce9b340534ff3d0ef3cd2b5d7b8f4dea43dade9112f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 01:51:01,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 01:51:01,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 01:51:01,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 01:51:01,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 01:51:01,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 01:51:01,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 01:51:01,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 01:51:01,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 01:51:01,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 01:51:01,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 01:51:01,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 01:51:01,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 01:51:01,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 01:51:01,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 01:51:01,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 01:51:01,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 01:51:01,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 01:51:01,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 01:51:01,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 01:51:01,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 01:51:01,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 01:51:01,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 01:51:01,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 01:51:01,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 01:51:01,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 01:51:01,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 01:51:01,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 01:51:01,126 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 01:51:01,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 01:51:01,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 01:51:01,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 01:51:01,131 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 01:51:01,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 01:51:01,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 01:51:01,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 01:51:01,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 01:51:01,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 01:51:01,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 01:51:01,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 01:51:01,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 01:51:01,138 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 01:51:01,184 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 01:51:01,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 01:51:01,184 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 01:51:01,185 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 01:51:01,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 01:51:01,186 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 01:51:01,186 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 01:51:01,186 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 01:51:01,186 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 01:51:01,187 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 01:51:01,188 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 01:51:01,188 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 01:51:01,188 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 01:51:01,188 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 01:51:01,188 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 01:51:01,189 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 01:51:01,189 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 01:51:01,189 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 01:51:01,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 01:51:01,191 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 01:51:01,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 01:51:01,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 01:51:01,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 01:51:01,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 01:51:01,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 01:51:01,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 01:51:01,193 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 01:51:01,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 01:51:01,194 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 01:51:01,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 01:51:01,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 01:51:01,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 01:51:01,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:51:01,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 01:51:01,195 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 01:51:01,195 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 01:51:01,196 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 01:51:01,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 01:51:01,196 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 01:51:01,196 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 01:51:01,196 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 01:51:01,197 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_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11bb1f05736dca729c358ce9b340534ff3d0ef3cd2b5d7b8f4dea43dade9112f [2021-11-23 01:51:01,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 01:51:01,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 01:51:01,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 01:51:01,603 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 01:51:01,603 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 01:51:01,605 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2021-11-23 01:51:01,685 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/data/a64d6003c/02f102a4d4da4ba288556dcef342ffc2/FLAGbab798811 [2021-11-23 01:51:02,409 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 01:51:02,410 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2021-11-23 01:51:02,452 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/data/a64d6003c/02f102a4d4da4ba288556dcef342ffc2/FLAGbab798811 [2021-11-23 01:51:02,599 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/data/a64d6003c/02f102a4d4da4ba288556dcef342ffc2 [2021-11-23 01:51:02,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 01:51:02,603 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 01:51:02,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 01:51:02,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 01:51:02,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 01:51:02,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:51:02" (1/1) ... [2021-11-23 01:51:02,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d164164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:02, skipping insertion in model container [2021-11-23 01:51:02,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:51:02" (1/1) ... [2021-11-23 01:51:02,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 01:51:02,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 01:51:03,362 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_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c[66437,66450] [2021-11-23 01:51:03,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:51:03,384 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 01:51:03,577 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_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c[66437,66450] [2021-11-23 01:51:03,586 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:51:03,641 INFO L208 MainTranslator]: Completed translation [2021-11-23 01:51:03,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:03 WrapperNode [2021-11-23 01:51:03,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 01:51:03,642 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 01:51:03,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 01:51:03,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 01:51:03,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:03" (1/1) ... [2021-11-23 01:51:03,695 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:03" (1/1) ... [2021-11-23 01:51:03,754 INFO L137 Inliner]: procedures = 95, calls = 339, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 1122 [2021-11-23 01:51:03,754 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 01:51:03,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 01:51:03,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 01:51:03,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 01:51:03,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:03" (1/1) ... [2021-11-23 01:51:03,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:03" (1/1) ... [2021-11-23 01:51:03,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:03" (1/1) ... [2021-11-23 01:51:03,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:03" (1/1) ... [2021-11-23 01:51:03,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:03" (1/1) ... [2021-11-23 01:51:03,837 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:03" (1/1) ... [2021-11-23 01:51:03,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:03" (1/1) ... [2021-11-23 01:51:03,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 01:51:03,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 01:51:03,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 01:51:03,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 01:51:03,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:03" (1/1) ... [2021-11-23 01:51:03,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:51:03,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:03,926 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 01:51:03,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 01:51:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 01:51:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-23 01:51:03,979 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-23 01:51:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-23 01:51:03,979 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-23 01:51:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-23 01:51:03,979 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-23 01:51:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-23 01:51:03,979 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-23 01:51:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-23 01:51:03,979 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-23 01:51:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-23 01:51:03,980 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-23 01:51:03,980 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-23 01:51:03,980 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-23 01:51:03,980 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-23 01:51:03,980 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-23 01:51:03,980 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-23 01:51:03,980 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-23 01:51:03,980 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-23 01:51:03,980 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-23 01:51:03,980 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-23 01:51:03,980 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-23 01:51:03,980 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-23 01:51:03,980 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-23 01:51:03,981 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-23 01:51:03,981 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-23 01:51:03,981 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-23 01:51:03,981 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-23 01:51:03,981 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-23 01:51:03,981 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-23 01:51:03,981 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-23 01:51:03,981 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-23 01:51:03,981 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-23 01:51:03,982 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-23 01:51:03,982 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-23 01:51:03,982 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-23 01:51:03,982 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-23 01:51:03,982 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-23 01:51:03,982 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2021-11-23 01:51:03,983 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2021-11-23 01:51:03,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 01:51:03,983 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-23 01:51:03,983 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-23 01:51:03,984 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-23 01:51:03,984 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-23 01:51:03,985 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-23 01:51:03,986 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-23 01:51:03,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 01:51:03,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 01:51:03,987 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-23 01:51:03,988 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-23 01:51:04,236 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 01:51:04,240 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 01:51:05,333 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 01:51:05,928 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 01:51:05,928 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 01:51:05,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:51:05 BoogieIcfgContainer [2021-11-23 01:51:05,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 01:51:05,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 01:51:05,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 01:51:05,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 01:51:05,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:51:02" (1/3) ... [2021-11-23 01:51:05,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a925345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:51:05, skipping insertion in model container [2021-11-23 01:51:05,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:03" (2/3) ... [2021-11-23 01:51:05,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a925345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:51:05, skipping insertion in model container [2021-11-23 01:51:05,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:51:05" (3/3) ... [2021-11-23 01:51:05,942 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product27.cil.c [2021-11-23 01:51:05,948 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 01:51:05,948 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 01:51:06,016 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 01:51:06,026 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 [2021-11-23 01:51:06,026 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 01:51:06,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 365 states, 246 states have (on average 1.5934959349593496) internal successors, (392), 267 states have internal predecessors, (392), 93 states have call successors, (93), 24 states have call predecessors, (93), 24 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-23 01:51:06,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 01:51:06,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:06,112 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:06,113 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:06,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:06,123 INFO L85 PathProgramCache]: Analyzing trace with hash 891352350, now seen corresponding path program 1 times [2021-11-23 01:51:06,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:06,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985607415] [2021-11-23 01:51:06,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:06,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 01:51:06,681 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:06,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985607415] [2021-11-23 01:51:06,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985607415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:06,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:51:06,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:51:06,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601423800] [2021-11-23 01:51:06,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:06,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 01:51:06,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:06,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 01:51:06,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 01:51:06,748 INFO L87 Difference]: Start difference. First operand has 365 states, 246 states have (on average 1.5934959349593496) internal successors, (392), 267 states have internal predecessors, (392), 93 states have call successors, (93), 24 states have call predecessors, (93), 24 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-23 01:51:06,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:06,975 INFO L93 Difference]: Finished difference Result 383 states and 605 transitions. [2021-11-23 01:51:06,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 01:51:06,978 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 77 [2021-11-23 01:51:06,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:07,008 INFO L225 Difference]: With dead ends: 383 [2021-11-23 01:51:07,008 INFO L226 Difference]: Without dead ends: 361 [2021-11-23 01:51:07,012 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 [2021-11-23 01:51:07,016 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:07,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 533 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:51:07,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-11-23 01:51:07,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2021-11-23 01:51:07,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 244 states have (on average 1.5819672131147542) internal successors, (386), 263 states have internal predecessors, (386), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (88), 86 states have call predecessors, (88), 88 states have call successors, (88) [2021-11-23 01:51:07,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 567 transitions. [2021-11-23 01:51:07,151 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 567 transitions. Word has length 77 [2021-11-23 01:51:07,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:07,154 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 567 transitions. [2021-11-23 01:51:07,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-23 01:51:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 567 transitions. [2021-11-23 01:51:07,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 01:51:07,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:07,174 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:07,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 01:51:07,175 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:07,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:07,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1343519303, now seen corresponding path program 1 times [2021-11-23 01:51:07,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:07,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407979064] [2021-11-23 01:51:07,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:07,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 01:51:07,422 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:07,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407979064] [2021-11-23 01:51:07,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407979064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:07,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:51:07,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 01:51:07,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812454977] [2021-11-23 01:51:07,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:07,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 01:51:07,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:07,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 01:51:07,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:51:07,426 INFO L87 Difference]: Start difference. First operand 361 states and 567 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-23 01:51:09,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:09,755 INFO L93 Difference]: Finished difference Result 1092 states and 1742 transitions. [2021-11-23 01:51:09,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 01:51:09,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 78 [2021-11-23 01:51:09,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:09,764 INFO L225 Difference]: With dead ends: 1092 [2021-11-23 01:51:09,764 INFO L226 Difference]: Without dead ends: 747 [2021-11-23 01:51:09,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-23 01:51:09,770 INFO L933 BasicCegarLoop]: 556 mSDtfsCounter, 1091 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 2152 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1160 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 2583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 2152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:09,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1160 Valid, 1641 Invalid, 2583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 2152 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 01:51:09,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2021-11-23 01:51:09,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 709. [2021-11-23 01:51:09,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 488 states have (on average 1.5942622950819672) internal successors, (778), 521 states have internal predecessors, (778), 176 states have call successors, (176), 44 states have call predecessors, (176), 44 states have return successors, (177), 168 states have call predecessors, (177), 171 states have call successors, (177) [2021-11-23 01:51:09,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1131 transitions. [2021-11-23 01:51:09,840 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1131 transitions. Word has length 78 [2021-11-23 01:51:09,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:09,841 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 1131 transitions. [2021-11-23 01:51:09,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-23 01:51:09,842 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1131 transitions. [2021-11-23 01:51:09,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 01:51:09,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:09,846 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:09,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 01:51:09,846 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:09,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:09,847 INFO L85 PathProgramCache]: Analyzing trace with hash -282883828, now seen corresponding path program 1 times [2021-11-23 01:51:09,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:09,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036961273] [2021-11-23 01:51:09,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:09,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:10,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 01:51:10,005 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:10,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036961273] [2021-11-23 01:51:10,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036961273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:10,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:51:10,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:51:10,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145309839] [2021-11-23 01:51:10,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:10,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:51:10,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:10,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:51:10,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:51:10,011 INFO L87 Difference]: Start difference. First operand 709 states and 1131 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-23 01:51:10,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:10,191 INFO L93 Difference]: Finished difference Result 2063 states and 3325 transitions. [2021-11-23 01:51:10,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:51:10,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 82 [2021-11-23 01:51:10,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:10,204 INFO L225 Difference]: With dead ends: 2063 [2021-11-23 01:51:10,205 INFO L226 Difference]: Without dead ends: 1370 [2021-11-23 01:51:10,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:51:10,210 INFO L933 BasicCegarLoop]: 646 mSDtfsCounter, 531 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:10,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 1156 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:51:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-11-23 01:51:10,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1342. [2021-11-23 01:51:10,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 944 states have (on average 1.6069915254237288) internal successors, (1517), 1006 states have internal predecessors, (1517), 316 states have call successors, (316), 79 states have call predecessors, (316), 81 states have return successors, (330), 294 states have call predecessors, (330), 311 states have call successors, (330) [2021-11-23 01:51:10,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 2163 transitions. [2021-11-23 01:51:10,338 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 2163 transitions. Word has length 82 [2021-11-23 01:51:10,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:10,339 INFO L470 AbstractCegarLoop]: Abstraction has 1342 states and 2163 transitions. [2021-11-23 01:51:10,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-23 01:51:10,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 2163 transitions. [2021-11-23 01:51:10,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 01:51:10,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:10,343 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:10,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 01:51:10,343 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:10,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:10,344 INFO L85 PathProgramCache]: Analyzing trace with hash -179594996, now seen corresponding path program 1 times [2021-11-23 01:51:10,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:10,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139025250] [2021-11-23 01:51:10,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:10,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 01:51:10,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:10,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139025250] [2021-11-23 01:51:10,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139025250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:10,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:51:10,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:51:10,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651915826] [2021-11-23 01:51:10,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:10,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:51:10,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:10,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:51:10,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:51:10,445 INFO L87 Difference]: Start difference. First operand 1342 states and 2163 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-23 01:51:10,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:10,682 INFO L93 Difference]: Finished difference Result 3963 states and 6446 transitions. [2021-11-23 01:51:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:51:10,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 83 [2021-11-23 01:51:10,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:10,705 INFO L225 Difference]: With dead ends: 3963 [2021-11-23 01:51:10,705 INFO L226 Difference]: Without dead ends: 2638 [2021-11-23 01:51:10,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:51:10,714 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 530 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:10,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 1162 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:51:10,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2021-11-23 01:51:10,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 2609. [2021-11-23 01:51:10,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 1857 states have (on average 1.6122778675282714) internal successors, (2994), 1977 states have internal predecessors, (2994), 596 states have call successors, (596), 149 states have call predecessors, (596), 155 states have return successors, (652), 546 states have call predecessors, (652), 591 states have call successors, (652) [2021-11-23 01:51:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 4242 transitions. [2021-11-23 01:51:10,959 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 4242 transitions. Word has length 83 [2021-11-23 01:51:10,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:10,963 INFO L470 AbstractCegarLoop]: Abstraction has 2609 states and 4242 transitions. [2021-11-23 01:51:10,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-23 01:51:10,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 4242 transitions. [2021-11-23 01:51:10,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-23 01:51:10,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:10,967 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:10,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 01:51:10,968 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:10,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:10,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1272604594, now seen corresponding path program 1 times [2021-11-23 01:51:10,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:10,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310800714] [2021-11-23 01:51:10,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:10,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 01:51:11,107 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:11,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310800714] [2021-11-23 01:51:11,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310800714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:11,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:51:11,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:51:11,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134846879] [2021-11-23 01:51:11,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:11,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:51:11,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:11,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:51:11,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:51:11,110 INFO L87 Difference]: Start difference. First operand 2609 states and 4242 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-23 01:51:11,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:11,467 INFO L93 Difference]: Finished difference Result 7764 states and 12766 transitions. [2021-11-23 01:51:11,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:51:11,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 84 [2021-11-23 01:51:11,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:11,516 INFO L225 Difference]: With dead ends: 7764 [2021-11-23 01:51:11,516 INFO L226 Difference]: Without dead ends: 5174 [2021-11-23 01:51:11,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:51:11,533 INFO L933 BasicCegarLoop]: 652 mSDtfsCounter, 529 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:11,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 1168 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:51:11,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5174 states. [2021-11-23 01:51:11,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5174 to 5144. [2021-11-23 01:51:11,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5144 states, 3684 states have (on average 1.6134636264929425) internal successors, (5944), 3920 states have internal predecessors, (5944), 1156 states have call successors, (1156), 289 states have call predecessors, (1156), 303 states have return successors, (1356), 1050 states have call predecessors, (1356), 1151 states have call successors, (1356) [2021-11-23 01:51:11,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5144 states to 5144 states and 8456 transitions. [2021-11-23 01:51:11,971 INFO L78 Accepts]: Start accepts. Automaton has 5144 states and 8456 transitions. Word has length 84 [2021-11-23 01:51:11,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:11,972 INFO L470 AbstractCegarLoop]: Abstraction has 5144 states and 8456 transitions. [2021-11-23 01:51:11,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-23 01:51:11,972 INFO L276 IsEmpty]: Start isEmpty. Operand 5144 states and 8456 transitions. [2021-11-23 01:51:11,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 01:51:11,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:11,975 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:11,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 01:51:11,976 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:11,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:11,976 INFO L85 PathProgramCache]: Analyzing trace with hash -796159858, now seen corresponding path program 1 times [2021-11-23 01:51:11,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:11,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24983809] [2021-11-23 01:51:11,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:11,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:12,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 01:51:12,116 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:12,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24983809] [2021-11-23 01:51:12,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24983809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:12,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:51:12,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:51:12,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910463728] [2021-11-23 01:51:12,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:12,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:51:12,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:12,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:51:12,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:51:12,118 INFO L87 Difference]: Start difference. First operand 5144 states and 8456 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-23 01:51:12,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:12,682 INFO L93 Difference]: Finished difference Result 15367 states and 25703 transitions. [2021-11-23 01:51:12,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:51:12,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 85 [2021-11-23 01:51:12,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:12,775 INFO L225 Difference]: With dead ends: 15367 [2021-11-23 01:51:12,776 INFO L226 Difference]: Without dead ends: 10246 [2021-11-23 01:51:12,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:51:12,809 INFO L933 BasicCegarLoop]: 655 mSDtfsCounter, 528 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:12,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 1174 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:51:12,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10246 states. [2021-11-23 01:51:13,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10246 to 10215. [2021-11-23 01:51:13,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10215 states, 7339 states have (on average 1.6124812644774493) internal successors, (11834), 7807 states have internal predecessors, (11834), 2276 states have call successors, (2276), 569 states have call predecessors, (2276), 599 states have return successors, (2992), 2058 states have call predecessors, (2992), 2271 states have call successors, (2992) [2021-11-23 01:51:13,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10215 states to 10215 states and 17102 transitions. [2021-11-23 01:51:13,668 INFO L78 Accepts]: Start accepts. Automaton has 10215 states and 17102 transitions. Word has length 85 [2021-11-23 01:51:13,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:13,670 INFO L470 AbstractCegarLoop]: Abstraction has 10215 states and 17102 transitions. [2021-11-23 01:51:13,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-23 01:51:13,671 INFO L276 IsEmpty]: Start isEmpty. Operand 10215 states and 17102 transitions. [2021-11-23 01:51:13,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-23 01:51:13,675 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:13,675 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:13,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 01:51:13,675 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:13,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:13,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1088728976, now seen corresponding path program 1 times [2021-11-23 01:51:13,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:13,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777170022] [2021-11-23 01:51:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:13,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 01:51:13,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:13,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777170022] [2021-11-23 01:51:13,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777170022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:13,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:51:13,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:51:13,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249490377] [2021-11-23 01:51:13,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:13,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:51:13,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:13,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:51:13,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:51:13,814 INFO L87 Difference]: Start difference. First operand 10215 states and 17102 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-23 01:51:14,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:14,372 INFO L93 Difference]: Finished difference Result 10881 states and 18259 transitions. [2021-11-23 01:51:14,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:51:14,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 86 [2021-11-23 01:51:14,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:14,464 INFO L225 Difference]: With dead ends: 10881 [2021-11-23 01:51:14,464 INFO L226 Difference]: Without dead ends: 10870 [2021-11-23 01:51:14,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:51:14,473 INFO L933 BasicCegarLoop]: 648 mSDtfsCounter, 514 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:14,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 1172 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:51:14,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10870 states. [2021-11-23 01:51:15,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10870 to 10844. [2021-11-23 01:51:15,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10844 states, 7792 states have (on average 1.6112679671457906) internal successors, (12555), 8289 states have internal predecessors, (12555), 2416 states have call successors, (2416), 604 states have call predecessors, (2416), 635 states have return successors, (3234), 2183 states have call predecessors, (3234), 2411 states have call successors, (3234) [2021-11-23 01:51:15,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10844 states to 10844 states and 18205 transitions. [2021-11-23 01:51:15,269 INFO L78 Accepts]: Start accepts. Automaton has 10844 states and 18205 transitions. Word has length 86 [2021-11-23 01:51:15,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:15,270 INFO L470 AbstractCegarLoop]: Abstraction has 10844 states and 18205 transitions. [2021-11-23 01:51:15,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-23 01:51:15,270 INFO L276 IsEmpty]: Start isEmpty. Operand 10844 states and 18205 transitions. [2021-11-23 01:51:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 01:51:15,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:15,277 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:15,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 01:51:15,277 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:15,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:15,278 INFO L85 PathProgramCache]: Analyzing trace with hash 2134189116, now seen corresponding path program 1 times [2021-11-23 01:51:15,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:15,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469791336] [2021-11-23 01:51:15,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:15,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-23 01:51:15,389 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:15,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469791336] [2021-11-23 01:51:15,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469791336] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:15,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:51:15,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:51:15,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916582959] [2021-11-23 01:51:15,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:15,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:51:15,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:15,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:51:15,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:51:15,391 INFO L87 Difference]: Start difference. First operand 10844 states and 18205 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-23 01:51:16,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:16,146 INFO L93 Difference]: Finished difference Result 23065 states and 39584 transitions. [2021-11-23 01:51:16,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:51:16,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 135 [2021-11-23 01:51:16,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:16,250 INFO L225 Difference]: With dead ends: 23065 [2021-11-23 01:51:16,250 INFO L226 Difference]: Without dead ends: 12238 [2021-11-23 01:51:16,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:51:16,330 INFO L933 BasicCegarLoop]: 553 mSDtfsCounter, 97 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:16,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 1604 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:51:16,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12238 states. [2021-11-23 01:51:16,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12238 to 11200. [2021-11-23 01:51:17,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11200 states, 8100 states have (on average 1.6038271604938272) internal successors, (12991), 8597 states have internal predecessors, (12991), 2448 states have call successors, (2448), 604 states have call predecessors, (2448), 651 states have return successors, (3347), 2215 states have call predecessors, (3347), 2443 states have call successors, (3347) [2021-11-23 01:51:17,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11200 states to 11200 states and 18786 transitions. [2021-11-23 01:51:17,117 INFO L78 Accepts]: Start accepts. Automaton has 11200 states and 18786 transitions. Word has length 135 [2021-11-23 01:51:17,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:17,117 INFO L470 AbstractCegarLoop]: Abstraction has 11200 states and 18786 transitions. [2021-11-23 01:51:17,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-23 01:51:17,118 INFO L276 IsEmpty]: Start isEmpty. Operand 11200 states and 18786 transitions. [2021-11-23 01:51:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-23 01:51:17,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:17,127 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:17,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 01:51:17,127 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:17,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:17,128 INFO L85 PathProgramCache]: Analyzing trace with hash 2096454308, now seen corresponding path program 1 times [2021-11-23 01:51:17,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:17,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113448619] [2021-11-23 01:51:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:17,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-23 01:51:17,255 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:17,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113448619] [2021-11-23 01:51:17,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113448619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:51:17,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501593903] [2021-11-23 01:51:17,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:17,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:17,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:17,258 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:51:17,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 01:51:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:17,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 01:51:17,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 01:51:18,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:51:18,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501593903] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:18,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:51:18,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-23 01:51:18,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703648951] [2021-11-23 01:51:18,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:18,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:51:18,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:18,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:51:18,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:51:18,126 INFO L87 Difference]: Start difference. First operand 11200 states and 18786 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 01:51:18,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:18,845 INFO L93 Difference]: Finished difference Result 23709 states and 40784 transitions. [2021-11-23 01:51:18,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:51:18,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 138 [2021-11-23 01:51:18,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:18,937 INFO L225 Difference]: With dead ends: 23709 [2021-11-23 01:51:18,938 INFO L226 Difference]: Without dead ends: 12526 [2021-11-23 01:51:18,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:51:18,996 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 213 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1368 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:18,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1368 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:51:19,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12526 states. [2021-11-23 01:51:19,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12526 to 12526. [2021-11-23 01:51:19,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12526 states, 9392 states have (on average 1.6474659284497444) internal successors, (15473), 9889 states have internal predecessors, (15473), 2448 states have call successors, (2448), 638 states have call predecessors, (2448), 685 states have return successors, (3347), 2215 states have call predecessors, (3347), 2443 states have call successors, (3347) [2021-11-23 01:51:19,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12526 states to 12526 states and 21268 transitions. [2021-11-23 01:51:19,869 INFO L78 Accepts]: Start accepts. Automaton has 12526 states and 21268 transitions. Word has length 138 [2021-11-23 01:51:19,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:19,870 INFO L470 AbstractCegarLoop]: Abstraction has 12526 states and 21268 transitions. [2021-11-23 01:51:19,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 01:51:19,870 INFO L276 IsEmpty]: Start isEmpty. Operand 12526 states and 21268 transitions. [2021-11-23 01:51:19,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-23 01:51:19,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:19,877 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:19,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 01:51:20,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 01:51:20,102 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:20,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:20,102 INFO L85 PathProgramCache]: Analyzing trace with hash -285759011, now seen corresponding path program 1 times [2021-11-23 01:51:20,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:20,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094570416] [2021-11-23 01:51:20,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:20,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 01:51:20,242 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:20,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094570416] [2021-11-23 01:51:20,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094570416] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:51:20,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755424877] [2021-11-23 01:51:20,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:20,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:20,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:20,244 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:51:20,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 01:51:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:20,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 1832 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 01:51:20,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 01:51:20,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:51:20,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755424877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:20,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:51:20,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-23 01:51:20,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147851794] [2021-11-23 01:51:20,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:20,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:51:20,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:20,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:51:20,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:51:20,929 INFO L87 Difference]: Start difference. First operand 12526 states and 21268 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 01:51:21,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:21,844 INFO L93 Difference]: Finished difference Result 26361 states and 45714 transitions. [2021-11-23 01:51:21,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:51:21,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 143 [2021-11-23 01:51:21,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:21,935 INFO L225 Difference]: With dead ends: 26361 [2021-11-23 01:51:21,935 INFO L226 Difference]: Without dead ends: 13852 [2021-11-23 01:51:21,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:51:21,989 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 211 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1368 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:21,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1368 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 01:51:22,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13852 states. [2021-11-23 01:51:22,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13852 to 13852. [2021-11-23 01:51:22,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13852 states, 10684 states have (on average 1.680550355672033) internal successors, (17955), 11181 states have internal predecessors, (17955), 2448 states have call successors, (2448), 672 states have call predecessors, (2448), 719 states have return successors, (3347), 2215 states have call predecessors, (3347), 2443 states have call successors, (3347) [2021-11-23 01:51:22,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13852 states to 13852 states and 23750 transitions. [2021-11-23 01:51:22,801 INFO L78 Accepts]: Start accepts. Automaton has 13852 states and 23750 transitions. Word has length 143 [2021-11-23 01:51:22,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:22,802 INFO L470 AbstractCegarLoop]: Abstraction has 13852 states and 23750 transitions. [2021-11-23 01:51:22,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 01:51:22,802 INFO L276 IsEmpty]: Start isEmpty. Operand 13852 states and 23750 transitions. [2021-11-23 01:51:22,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-23 01:51:22,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:22,810 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:22,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 01:51:23,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 01:51:23,026 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:23,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:23,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1092263247, now seen corresponding path program 1 times [2021-11-23 01:51:23,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:23,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628550897] [2021-11-23 01:51:23,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:23,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-23 01:51:23,521 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:23,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628550897] [2021-11-23 01:51:23,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628550897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:51:23,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157307523] [2021-11-23 01:51:23,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:23,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:23,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:23,526 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:51:23,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 01:51:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:23,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 1836 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 01:51:23,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:24,106 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 01:51:24,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:51:24,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157307523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:24,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:51:24,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2021-11-23 01:51:24,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999027889] [2021-11-23 01:51:24,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:24,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:51:24,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:24,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:51:24,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-11-23 01:51:24,110 INFO L87 Difference]: Start difference. First operand 13852 states and 23750 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 01:51:25,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:25,077 INFO L93 Difference]: Finished difference Result 29013 states and 50644 transitions. [2021-11-23 01:51:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:51:25,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 147 [2021-11-23 01:51:25,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:25,148 INFO L225 Difference]: With dead ends: 29013 [2021-11-23 01:51:25,148 INFO L226 Difference]: Without dead ends: 15178 [2021-11-23 01:51:25,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-11-23 01:51:25,188 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 209 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1368 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:25,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1368 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:51:25,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15178 states. [2021-11-23 01:51:25,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15178 to 15178. [2021-11-23 01:51:25,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15178 states, 11976 states have (on average 1.7064963259853039) internal successors, (20437), 12473 states have internal predecessors, (20437), 2448 states have call successors, (2448), 706 states have call predecessors, (2448), 753 states have return successors, (3347), 2215 states have call predecessors, (3347), 2443 states have call successors, (3347) [2021-11-23 01:51:25,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15178 states to 15178 states and 26232 transitions. [2021-11-23 01:51:25,878 INFO L78 Accepts]: Start accepts. Automaton has 15178 states and 26232 transitions. Word has length 147 [2021-11-23 01:51:25,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:25,881 INFO L470 AbstractCegarLoop]: Abstraction has 15178 states and 26232 transitions. [2021-11-23 01:51:25,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 01:51:25,881 INFO L276 IsEmpty]: Start isEmpty. Operand 15178 states and 26232 transitions. [2021-11-23 01:51:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-23 01:51:25,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:25,890 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:25,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 01:51:26,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:26,109 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:26,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:26,110 INFO L85 PathProgramCache]: Analyzing trace with hash -69358592, now seen corresponding path program 1 times [2021-11-23 01:51:26,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:26,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827121656] [2021-11-23 01:51:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:26,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 01:51:26,589 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:26,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827121656] [2021-11-23 01:51:26,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827121656] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:51:26,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091165831] [2021-11-23 01:51:26,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:26,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:26,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:26,594 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:51:26,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 01:51:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:26,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 01:51:26,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:27,241 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 01:51:27,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:51:27,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091165831] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:27,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:51:27,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2021-11-23 01:51:27,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693176368] [2021-11-23 01:51:27,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:27,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:51:27,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:27,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:51:27,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-11-23 01:51:27,244 INFO L87 Difference]: Start difference. First operand 15178 states and 26232 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 01:51:28,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:28,098 INFO L93 Difference]: Finished difference Result 31665 states and 55574 transitions. [2021-11-23 01:51:28,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:51:28,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 150 [2021-11-23 01:51:28,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:28,201 INFO L225 Difference]: With dead ends: 31665 [2021-11-23 01:51:28,202 INFO L226 Difference]: Without dead ends: 16504 [2021-11-23 01:51:28,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-11-23 01:51:28,391 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 207 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1368 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:28,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1368 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:51:28,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16504 states. [2021-11-23 01:51:29,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16504 to 16504. [2021-11-23 01:51:29,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16504 states, 13268 states have (on average 1.7273892071148629) internal successors, (22919), 13765 states have internal predecessors, (22919), 2448 states have call successors, (2448), 740 states have call predecessors, (2448), 787 states have return successors, (3347), 2215 states have call predecessors, (3347), 2443 states have call successors, (3347) [2021-11-23 01:51:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16504 states to 16504 states and 28714 transitions. [2021-11-23 01:51:29,134 INFO L78 Accepts]: Start accepts. Automaton has 16504 states and 28714 transitions. Word has length 150 [2021-11-23 01:51:29,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:29,135 INFO L470 AbstractCegarLoop]: Abstraction has 16504 states and 28714 transitions. [2021-11-23 01:51:29,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 01:51:29,135 INFO L276 IsEmpty]: Start isEmpty. Operand 16504 states and 28714 transitions. [2021-11-23 01:51:29,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-23 01:51:29,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:29,142 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:29,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 01:51:29,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:29,369 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:29,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:29,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1581971954, now seen corresponding path program 1 times [2021-11-23 01:51:29,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:29,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443554691] [2021-11-23 01:51:29,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:29,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 01:51:29,832 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:29,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443554691] [2021-11-23 01:51:29,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443554691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:51:29,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718653734] [2021-11-23 01:51:29,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:29,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:29,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:29,833 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:51:29,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 01:51:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:30,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 1835 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 01:51:30,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-23 01:51:30,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:51:30,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718653734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:30,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:51:30,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2021-11-23 01:51:30,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561189647] [2021-11-23 01:51:30,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:30,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:51:30,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:30,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:51:30,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-11-23 01:51:30,508 INFO L87 Difference]: Start difference. First operand 16504 states and 28714 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 01:51:31,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:31,138 INFO L93 Difference]: Finished difference Result 34206 states and 59537 transitions. [2021-11-23 01:51:31,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:51:31,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) Word has length 152 [2021-11-23 01:51:31,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:31,234 INFO L225 Difference]: With dead ends: 34206 [2021-11-23 01:51:31,234 INFO L226 Difference]: Without dead ends: 17734 [2021-11-23 01:51:31,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-11-23 01:51:31,395 INFO L933 BasicCegarLoop]: 602 mSDtfsCounter, 312 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:31,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 1484 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:51:31,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17734 states. [2021-11-23 01:51:32,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17734 to 17546. [2021-11-23 01:51:32,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17546 states, 13914 states have (on average 1.707273249964065) internal successors, (23755), 14430 states have internal predecessors, (23755), 2688 states have call successors, (2688), 910 states have call predecessors, (2688), 943 states have return successors, (4076), 2421 states have call predecessors, (4076), 2683 states have call successors, (4076) [2021-11-23 01:51:32,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17546 states to 17546 states and 30519 transitions. [2021-11-23 01:51:32,232 INFO L78 Accepts]: Start accepts. Automaton has 17546 states and 30519 transitions. Word has length 152 [2021-11-23 01:51:32,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:32,232 INFO L470 AbstractCegarLoop]: Abstraction has 17546 states and 30519 transitions. [2021-11-23 01:51:32,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 01:51:32,233 INFO L276 IsEmpty]: Start isEmpty. Operand 17546 states and 30519 transitions. [2021-11-23 01:51:32,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-23 01:51:32,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:32,242 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:32,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 01:51:32,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 01:51:32,470 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:32,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:32,470 INFO L85 PathProgramCache]: Analyzing trace with hash -356787221, now seen corresponding path program 1 times [2021-11-23 01:51:32,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:32,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495395839] [2021-11-23 01:51:32,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:32,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 01:51:32,924 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:32,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495395839] [2021-11-23 01:51:32,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495395839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:51:32,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118223921] [2021-11-23 01:51:32,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:32,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:32,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:32,927 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:51:32,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 01:51:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:33,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 1841 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 01:51:33,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-23 01:51:33,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:51:33,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118223921] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:33,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:51:33,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 25 [2021-11-23 01:51:33,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420625029] [2021-11-23 01:51:33,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:33,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:51:33,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:33,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:51:33,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-11-23 01:51:33,709 INFO L87 Difference]: Start difference. First operand 17546 states and 30519 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2021-11-23 01:51:34,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:34,631 INFO L93 Difference]: Finished difference Result 18183 states and 31878 transitions. [2021-11-23 01:51:34,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:51:34,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) Word has length 155 [2021-11-23 01:51:34,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:34,735 INFO L225 Difference]: With dead ends: 18183 [2021-11-23 01:51:34,735 INFO L226 Difference]: Without dead ends: 18097 [2021-11-23 01:51:34,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-11-23 01:51:34,748 INFO L933 BasicCegarLoop]: 529 mSDtfsCounter, 477 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:34,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 1219 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 01:51:34,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18097 states. [2021-11-23 01:51:35,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18097 to 17578. [2021-11-23 01:51:35,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17578 states, 13946 states have (on average 1.705650365696257) internal successors, (23787), 14462 states have internal predecessors, (23787), 2688 states have call successors, (2688), 910 states have call predecessors, (2688), 943 states have return successors, (4076), 2421 states have call predecessors, (4076), 2683 states have call successors, (4076) [2021-11-23 01:51:35,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17578 states to 17578 states and 30551 transitions. [2021-11-23 01:51:35,587 INFO L78 Accepts]: Start accepts. Automaton has 17578 states and 30551 transitions. Word has length 155 [2021-11-23 01:51:35,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:35,588 INFO L470 AbstractCegarLoop]: Abstraction has 17578 states and 30551 transitions. [2021-11-23 01:51:35,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2021-11-23 01:51:35,588 INFO L276 IsEmpty]: Start isEmpty. Operand 17578 states and 30551 transitions. [2021-11-23 01:51:35,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-23 01:51:35,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:35,597 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:35,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 01:51:35,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 01:51:35,817 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:35,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:35,818 INFO L85 PathProgramCache]: Analyzing trace with hash 863822892, now seen corresponding path program 1 times [2021-11-23 01:51:35,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:35,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997132304] [2021-11-23 01:51:35,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:35,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 01:51:36,243 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:36,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997132304] [2021-11-23 01:51:36,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997132304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:51:36,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415211937] [2021-11-23 01:51:36,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:36,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:36,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:36,245 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:51:36,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 01:51:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:36,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 1856 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 01:51:36,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-23 01:51:37,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:51:37,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415211937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:37,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:51:37,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [22] total 25 [2021-11-23 01:51:37,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218095649] [2021-11-23 01:51:37,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:37,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:51:37,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:37,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:51:37,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-11-23 01:51:37,007 INFO L87 Difference]: Start difference. First operand 17578 states and 30551 transitions. Second operand has 5 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-23 01:51:37,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:37,476 INFO L93 Difference]: Finished difference Result 17704 states and 30709 transitions. [2021-11-23 01:51:37,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:51:37,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 1 states have call successors, (25) Word has length 160 [2021-11-23 01:51:37,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:37,566 INFO L225 Difference]: With dead ends: 17704 [2021-11-23 01:51:37,566 INFO L226 Difference]: Without dead ends: 17618 [2021-11-23 01:51:37,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-11-23 01:51:37,580 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 30 mSDsluCounter, 1664 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:37,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 2092 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:51:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17618 states. [2021-11-23 01:51:38,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17618 to 17578. [2021-11-23 01:51:38,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17578 states, 13946 states have (on average 1.7022085185716334) internal successors, (23739), 14462 states have internal predecessors, (23739), 2688 states have call successors, (2688), 910 states have call predecessors, (2688), 943 states have return successors, (4076), 2421 states have call predecessors, (4076), 2683 states have call successors, (4076) [2021-11-23 01:51:38,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17578 states to 17578 states and 30503 transitions. [2021-11-23 01:51:38,416 INFO L78 Accepts]: Start accepts. Automaton has 17578 states and 30503 transitions. Word has length 160 [2021-11-23 01:51:38,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:38,416 INFO L470 AbstractCegarLoop]: Abstraction has 17578 states and 30503 transitions. [2021-11-23 01:51:38,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-23 01:51:38,417 INFO L276 IsEmpty]: Start isEmpty. Operand 17578 states and 30503 transitions. [2021-11-23 01:51:38,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-23 01:51:38,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:38,427 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:38,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 01:51:38,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:38,648 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:38,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:38,649 INFO L85 PathProgramCache]: Analyzing trace with hash 338144096, now seen corresponding path program 1 times [2021-11-23 01:51:38,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:38,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718134266] [2021-11-23 01:51:38,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:38,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:39,054 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-23 01:51:39,054 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:39,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718134266] [2021-11-23 01:51:39,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718134266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:51:39,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083779554] [2021-11-23 01:51:39,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:39,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:39,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:39,070 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:51:39,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 01:51:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:39,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 01:51:39,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-23 01:51:39,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:51:39,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083779554] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:39,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:51:39,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2021-11-23 01:51:39,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062546661] [2021-11-23 01:51:39,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:39,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:51:39,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:39,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:51:39,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-11-23 01:51:39,827 INFO L87 Difference]: Start difference. First operand 17578 states and 30503 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2021-11-23 01:51:40,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:40,400 INFO L93 Difference]: Finished difference Result 18605 states and 33303 transitions. [2021-11-23 01:51:40,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:51:40,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) Word has length 167 [2021-11-23 01:51:40,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:40,489 INFO L225 Difference]: With dead ends: 18605 [2021-11-23 01:51:40,490 INFO L226 Difference]: Without dead ends: 18519 [2021-11-23 01:51:40,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-11-23 01:51:40,505 INFO L933 BasicCegarLoop]: 565 mSDtfsCounter, 44 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1644 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:40,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 1644 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:51:40,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18519 states. [2021-11-23 01:51:41,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18519 to 17674. [2021-11-23 01:51:41,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17674 states, 14042 states have (on average 1.69740777666999) internal successors, (23835), 14558 states have internal predecessors, (23835), 2688 states have call successors, (2688), 910 states have call predecessors, (2688), 943 states have return successors, (4076), 2421 states have call predecessors, (4076), 2683 states have call successors, (4076) [2021-11-23 01:51:41,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17674 states to 17674 states and 30599 transitions. [2021-11-23 01:51:41,342 INFO L78 Accepts]: Start accepts. Automaton has 17674 states and 30599 transitions. Word has length 167 [2021-11-23 01:51:41,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:41,342 INFO L470 AbstractCegarLoop]: Abstraction has 17674 states and 30599 transitions. [2021-11-23 01:51:41,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2021-11-23 01:51:41,343 INFO L276 IsEmpty]: Start isEmpty. Operand 17674 states and 30599 transitions. [2021-11-23 01:51:41,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-23 01:51:41,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:41,355 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:41,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 01:51:41,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 01:51:41,570 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:41,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:41,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1114489417, now seen corresponding path program 1 times [2021-11-23 01:51:41,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:41,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162811654] [2021-11-23 01:51:41,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:41,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-23 01:51:41,976 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:41,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162811654] [2021-11-23 01:51:41,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162811654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:51:41,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482803040] [2021-11-23 01:51:41,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:41,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:41,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:41,978 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:51:42,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26947bc1-2f8c-4d30-a5e7-8fedd8fdcc38/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 01:51:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:42,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 1950 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-23 01:51:42,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-23 01:51:43,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:51:46,455 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2021-11-23 01:51:55,770 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2021-11-23 01:51:56,196 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2021-11-23 01:52:07,380 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2021-11-23 01:52:07,586 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time... [2021-11-23 01:55:37,520 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 49188 disjunctions. [2021-11-23 01:55:38,134 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2021-11-23 01:55:52,831 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions.