./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4fa4154afcc1fa94c570756c4d3485a9415aeef22801b46450f13cd61ecf8230 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 01:01:38,533 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:01:38,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:01:38,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:01:38,586 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:01:38,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:01:38,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:01:38,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:01:38,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:01:38,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:01:38,621 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:01:38,623 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:01:38,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:01:38,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:01:38,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:01:38,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:01:38,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:01:38,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:01:38,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:01:38,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:01:38,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:01:38,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:01:38,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:01:38,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:01:38,653 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:01:38,653 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:01:38,654 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:01:38,655 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:01:38,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:01:38,656 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:01:38,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:01:38,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:01:38,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:01:38,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:01:38,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:01:38,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:01:38,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:01:38,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:01:38,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:01:38,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:01:38,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:01:38,674 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 01:01:38,719 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:01:38,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:01:38,720 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:01:38,720 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:01:38,727 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:01:38,727 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:01:38,727 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:01:38,728 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:01:38,728 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:01:38,728 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:01:38,728 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:01:38,729 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:01:38,729 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:01:38,729 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:01:38,729 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:01:38,729 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:01:38,730 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:01:38,730 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:01:38,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:01:38,731 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:01:38,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:01:38,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:01:38,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:01:38,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:01:38,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:01:38,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:01:38,732 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:01:38,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:01:38,733 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:01:38,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:01:38,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:01:38,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:01:38,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:01:38,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:01:38,734 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:01:38,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:01:38,737 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:01:38,737 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:01:38,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:01:38,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:01:38,738 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:01:38,738 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fa4154afcc1fa94c570756c4d3485a9415aeef22801b46450f13cd61ecf8230 [2022-11-26 01:01:39,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:01:39,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:01:39,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:01:39,156 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:01:39,157 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:01:39,158 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c [2022-11-26 01:01:42,443 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:01:42,880 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:01:42,880 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c [2022-11-26 01:01:42,912 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/data/94e1aeb60/ce979720a7d34c1cbdef7fd00db1f563/FLAGd96b065bb [2022-11-26 01:01:43,036 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/data/94e1aeb60/ce979720a7d34c1cbdef7fd00db1f563 [2022-11-26 01:01:43,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:01:43,041 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:01:43,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:01:43,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:01:43,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:01:43,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:01:43" (1/1) ... [2022-11-26 01:01:43,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@770c0eba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:43, skipping insertion in model container [2022-11-26 01:01:43,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:01:43" (1/1) ... [2022-11-26 01:01:43,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:01:43,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:01:43,530 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c[14523,14536] [2022-11-26 01:01:43,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:01:43,838 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:01:43,904 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c[14523,14536] [2022-11-26 01:01:44,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:01:44,085 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:01:44,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:44 WrapperNode [2022-11-26 01:01:44,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:01:44,088 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:01:44,088 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:01:44,088 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:01:44,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:44" (1/1) ... [2022-11-26 01:01:44,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:44" (1/1) ... [2022-11-26 01:01:44,223 INFO L138 Inliner]: procedures = 93, calls = 353, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 949 [2022-11-26 01:01:44,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:01:44,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:01:44,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:01:44,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:01:44,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:44" (1/1) ... [2022-11-26 01:01:44,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:44" (1/1) ... [2022-11-26 01:01:44,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:44" (1/1) ... [2022-11-26 01:01:44,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:44" (1/1) ... [2022-11-26 01:01:44,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:44" (1/1) ... [2022-11-26 01:01:44,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:44" (1/1) ... [2022-11-26 01:01:44,297 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:44" (1/1) ... [2022-11-26 01:01:44,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:44" (1/1) ... [2022-11-26 01:01:44,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:01:44,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:01:44,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:01:44,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:01:44,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:44" (1/1) ... [2022-11-26 01:01:44,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:01:44,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:01:44,387 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:01:44,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:01:44,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:01:44,448 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-26 01:01:44,448 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-26 01:01:44,448 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-26 01:01:44,449 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-26 01:01:44,449 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-26 01:01:44,449 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-26 01:01:44,449 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-26 01:01:44,450 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-26 01:01:44,451 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-26 01:01:44,451 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-26 01:01:44,451 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-26 01:01:44,451 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-26 01:01:44,451 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-26 01:01:44,452 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-26 01:01:44,452 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-26 01:01:44,452 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-26 01:01:44,452 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-26 01:01:44,453 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-26 01:01:44,453 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-26 01:01:44,453 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-26 01:01:44,453 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-26 01:01:44,454 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-26 01:01:44,455 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-26 01:01:44,455 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-26 01:01:44,456 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-26 01:01:44,456 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-26 01:01:44,456 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-26 01:01:44,457 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-26 01:01:44,457 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-26 01:01:44,459 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-26 01:01:44,459 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-26 01:01:44,459 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-26 01:01:44,459 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-26 01:01:44,461 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-26 01:01:44,461 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-26 01:01:44,461 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-26 01:01:44,461 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-26 01:01:44,461 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-26 01:01:44,462 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-26 01:01:44,462 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-26 01:01:44,462 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-26 01:01:44,463 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-26 01:01:44,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:01:44,463 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-26 01:01:44,463 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-26 01:01:44,464 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-26 01:01:44,464 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-26 01:01:44,465 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-26 01:01:44,466 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-26 01:01:44,466 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-26 01:01:44,466 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-26 01:01:44,466 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2022-11-26 01:01:44,467 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2022-11-26 01:01:44,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:01:44,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:01:44,468 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-26 01:01:44,468 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-26 01:01:44,750 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:01:44,753 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:01:46,499 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:01:47,377 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:01:47,377 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 01:01:47,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:01:47 BoogieIcfgContainer [2022-11-26 01:01:47,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:01:47,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:01:47,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:01:47,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:01:47,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:01:43" (1/3) ... [2022-11-26 01:01:47,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6840bab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:01:47, skipping insertion in model container [2022-11-26 01:01:47,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:44" (2/3) ... [2022-11-26 01:01:47,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6840bab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:01:47, skipping insertion in model container [2022-11-26 01:01:47,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:01:47" (3/3) ... [2022-11-26 01:01:47,396 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product30.cil.c [2022-11-26 01:01:47,420 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:01:47,420 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:01:47,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:01:47,531 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@26b64f28, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:01:47,532 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:01:47,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 411 states, 274 states have (on average 1.572992700729927) internal successors, (431), 294 states have internal predecessors, (431), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-26 01:01:47,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-26 01:01:47,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:47,561 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:47,562 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:47,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:47,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1811851757, now seen corresponding path program 1 times [2022-11-26 01:01:47,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:47,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678994791] [2022-11-26 01:01:47,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:47,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:01:48,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:48,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678994791] [2022-11-26 01:01:48,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678994791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:48,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:01:48,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 01:01:48,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702646688] [2022-11-26 01:01:48,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:48,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:01:48,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:48,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:01:48,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:01:48,696 INFO L87 Difference]: Start difference. First operand has 411 states, 274 states have (on average 1.572992700729927) internal successors, (431), 294 states have internal predecessors, (431), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 01:01:50,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:50,139 INFO L93 Difference]: Finished difference Result 1171 states and 1873 transitions. [2022-11-26 01:01:50,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:01:50,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 49 [2022-11-26 01:01:50,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:50,164 INFO L225 Difference]: With dead ends: 1171 [2022-11-26 01:01:50,164 INFO L226 Difference]: Without dead ends: 762 [2022-11-26 01:01:50,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:01:50,180 INFO L413 NwaCegarLoop]: 701 mSDtfsCounter, 545 mSDsluCounter, 2427 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 3128 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:50,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 3128 Invalid, 739 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [53 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 01:01:50,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-11-26 01:01:50,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 754. [2022-11-26 01:01:50,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 505 states have (on average 1.500990099009901) internal successors, (758), 539 states have internal predecessors, (758), 200 states have call successors, (200), 51 states have call predecessors, (200), 48 states have return successors, (203), 190 states have call predecessors, (203), 196 states have call successors, (203) [2022-11-26 01:01:50,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1161 transitions. [2022-11-26 01:01:50,302 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1161 transitions. Word has length 49 [2022-11-26 01:01:50,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:50,303 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 1161 transitions. [2022-11-26 01:01:50,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 01:01:50,304 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1161 transitions. [2022-11-26 01:01:50,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-26 01:01:50,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:50,307 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:50,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 01:01:50,308 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:50,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:50,309 INFO L85 PathProgramCache]: Analyzing trace with hash -449226594, now seen corresponding path program 1 times [2022-11-26 01:01:50,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:50,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550690719] [2022-11-26 01:01:50,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:50,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:01:50,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:50,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550690719] [2022-11-26 01:01:50,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550690719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:50,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:01:50,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:01:50,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129459406] [2022-11-26 01:01:50,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:50,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:01:50,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:50,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:01:50,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:01:50,787 INFO L87 Difference]: Start difference. First operand 754 states and 1161 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 01:01:51,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:51,160 INFO L93 Difference]: Finished difference Result 2232 states and 3471 transitions. [2022-11-26 01:01:51,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:01:51,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2022-11-26 01:01:51,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:51,183 INFO L225 Difference]: With dead ends: 2232 [2022-11-26 01:01:51,183 INFO L226 Difference]: Without dead ends: 1491 [2022-11-26 01:01:51,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:01:51,191 INFO L413 NwaCegarLoop]: 704 mSDtfsCounter, 602 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:51,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 1285 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:01:51,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2022-11-26 01:01:51,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1419. [2022-11-26 01:01:51,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 979 states have (on average 1.5148110316649643) internal successors, (1483), 1031 states have internal predecessors, (1483), 353 states have call successors, (353), 91 states have call predecessors, (353), 86 states have return successors, (373), 324 states have call predecessors, (373), 347 states have call successors, (373) [2022-11-26 01:01:51,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 2209 transitions. [2022-11-26 01:01:51,342 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 2209 transitions. Word has length 50 [2022-11-26 01:01:51,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:51,343 INFO L495 AbstractCegarLoop]: Abstraction has 1419 states and 2209 transitions. [2022-11-26 01:01:51,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 01:01:51,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 2209 transitions. [2022-11-26 01:01:51,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-26 01:01:51,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:51,358 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:51,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 01:01:51,359 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:51,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:51,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1957902370, now seen corresponding path program 1 times [2022-11-26 01:01:51,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:51,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994556320] [2022-11-26 01:01:51,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:51,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:01:51,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:51,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994556320] [2022-11-26 01:01:51,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994556320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:51,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:01:51,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 01:01:51,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390084514] [2022-11-26 01:01:51,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:51,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:01:51,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:51,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:01:51,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:01:51,989 INFO L87 Difference]: Start difference. First operand 1419 states and 2209 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-26 01:01:53,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:53,341 INFO L93 Difference]: Finished difference Result 3701 states and 5970 transitions. [2022-11-26 01:01:53,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:01:53,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 86 [2022-11-26 01:01:53,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:53,363 INFO L225 Difference]: With dead ends: 3701 [2022-11-26 01:01:53,363 INFO L226 Difference]: Without dead ends: 2294 [2022-11-26 01:01:53,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:01:53,376 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 674 mSDsluCounter, 2678 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 3453 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:53,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 3453 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 01:01:53,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2022-11-26 01:01:53,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 2080. [2022-11-26 01:01:53,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 1439 states have (on average 1.507991660875608) internal successors, (2170), 1523 states have internal predecessors, (2170), 512 states have call successors, (512), 135 states have call predecessors, (512), 128 states have return successors, (581), 464 states have call predecessors, (581), 504 states have call successors, (581) [2022-11-26 01:01:53,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 3263 transitions. [2022-11-26 01:01:53,553 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 3263 transitions. Word has length 86 [2022-11-26 01:01:53,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:53,554 INFO L495 AbstractCegarLoop]: Abstraction has 2080 states and 3263 transitions. [2022-11-26 01:01:53,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-26 01:01:53,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 3263 transitions. [2022-11-26 01:01:53,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-26 01:01:53,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:53,559 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:53,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 01:01:53,560 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:53,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:53,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1338439674, now seen corresponding path program 1 times [2022-11-26 01:01:53,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:53,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871700170] [2022-11-26 01:01:53,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:53,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:01:54,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:54,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871700170] [2022-11-26 01:01:54,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871700170] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:01:54,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434737924] [2022-11-26 01:01:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:54,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:54,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:01:54,047 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:01:54,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:01:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:54,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 1807 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:01:54,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:01:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:54,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:01:54,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434737924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:54,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:01:54,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-26 01:01:54,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516001371] [2022-11-26 01:01:54,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:54,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:01:54,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:54,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:01:54,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:01:54,699 INFO L87 Difference]: Start difference. First operand 2080 states and 3263 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-26 01:01:55,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:55,169 INFO L93 Difference]: Finished difference Result 5950 states and 9595 transitions. [2022-11-26 01:01:55,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:01:55,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2022-11-26 01:01:55,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:55,205 INFO L225 Difference]: With dead ends: 5950 [2022-11-26 01:01:55,205 INFO L226 Difference]: Without dead ends: 3882 [2022-11-26 01:01:55,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:01:55,223 INFO L413 NwaCegarLoop]: 684 mSDtfsCounter, 565 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:55,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 1192 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:01:55,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2022-11-26 01:01:55,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3764. [2022-11-26 01:01:55,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3764 states, 2621 states have (on average 1.5215566577642121) internal successors, (3988), 2791 states have internal predecessors, (3988), 903 states have call successors, (903), 240 states have call predecessors, (903), 239 states have return successors, (1072), 818 states have call predecessors, (1072), 895 states have call successors, (1072) [2022-11-26 01:01:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 5963 transitions. [2022-11-26 01:01:55,517 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 5963 transitions. Word has length 86 [2022-11-26 01:01:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:55,518 INFO L495 AbstractCegarLoop]: Abstraction has 3764 states and 5963 transitions. [2022-11-26 01:01:55,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-26 01:01:55,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 5963 transitions. [2022-11-26 01:01:55,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-26 01:01:55,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:55,524 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:55,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 01:01:55,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-26 01:01:55,743 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:55,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:55,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1809689999, now seen corresponding path program 1 times [2022-11-26 01:01:55,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:55,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524463782] [2022-11-26 01:01:55,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:55,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:56,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:01:56,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:56,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524463782] [2022-11-26 01:01:56,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524463782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:01:56,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301468723] [2022-11-26 01:01:56,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:56,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:56,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:01:56,159 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:01:56,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:01:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:56,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 1808 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:01:56,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:01:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:56,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:01:56,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301468723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:56,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:01:56,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-26 01:01:56,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880982890] [2022-11-26 01:01:56,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:56,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:01:56,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:56,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:01:56,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:01:56,777 INFO L87 Difference]: Start difference. First operand 3764 states and 5963 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-26 01:01:57,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:57,295 INFO L93 Difference]: Finished difference Result 8443 states and 13531 transitions. [2022-11-26 01:01:57,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:01:57,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2022-11-26 01:01:57,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:57,335 INFO L225 Difference]: With dead ends: 8443 [2022-11-26 01:01:57,335 INFO L226 Difference]: Without dead ends: 4691 [2022-11-26 01:01:57,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:01:57,362 INFO L413 NwaCegarLoop]: 725 mSDtfsCounter, 564 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:57,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 1230 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:01:57,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2022-11-26 01:01:57,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 4627. [2022-11-26 01:01:57,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 3233 states have (on average 1.5310856789359728) internal successors, (4950), 3446 states have internal predecessors, (4950), 1100 states have call successors, (1100), 291 states have call predecessors, (1100), 293 states have return successors, (1306), 998 states have call predecessors, (1306), 1092 states have call successors, (1306) [2022-11-26 01:01:57,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 7356 transitions. [2022-11-26 01:01:57,678 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 7356 transitions. Word has length 86 [2022-11-26 01:01:57,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:57,680 INFO L495 AbstractCegarLoop]: Abstraction has 4627 states and 7356 transitions. [2022-11-26 01:01:57,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-26 01:01:57,682 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 7356 transitions. [2022-11-26 01:01:57,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-26 01:01:57,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:57,690 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:57,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-26 01:01:57,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:57,899 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:57,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:57,899 INFO L85 PathProgramCache]: Analyzing trace with hash 919722746, now seen corresponding path program 1 times [2022-11-26 01:01:57,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:57,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106355912] [2022-11-26 01:01:57,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:57,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:01:58,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:58,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106355912] [2022-11-26 01:01:58,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106355912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:01:58,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129212384] [2022-11-26 01:01:58,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:58,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:58,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:01:58,919 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:01:58,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:01:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:59,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 1833 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 01:01:59,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:01:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:01:59,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:01:59,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129212384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:59,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:01:59,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2022-11-26 01:01:59,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959542233] [2022-11-26 01:01:59,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:59,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:01:59,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:59,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:01:59,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-26 01:01:59,521 INFO L87 Difference]: Start difference. First operand 4627 states and 7356 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-26 01:02:00,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:00,135 INFO L93 Difference]: Finished difference Result 10083 states and 16056 transitions. [2022-11-26 01:02:00,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:02:00,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 91 [2022-11-26 01:02:00,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:00,186 INFO L225 Difference]: With dead ends: 10083 [2022-11-26 01:02:00,187 INFO L226 Difference]: Without dead ends: 5468 [2022-11-26 01:02:00,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-26 01:02:00,224 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 423 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:00,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 1796 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:02:00,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5468 states. [2022-11-26 01:02:00,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5468 to 5355. [2022-11-26 01:02:00,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5355 states, 3739 states have (on average 1.4995988232147632) internal successors, (5607), 3950 states have internal predecessors, (5607), 1238 states have call successors, (1238), 354 states have call predecessors, (1238), 377 states have return successors, (1577), 1156 states have call predecessors, (1577), 1227 states have call successors, (1577) [2022-11-26 01:02:00,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5355 states to 5355 states and 8422 transitions. [2022-11-26 01:02:00,743 INFO L78 Accepts]: Start accepts. Automaton has 5355 states and 8422 transitions. Word has length 91 [2022-11-26 01:02:00,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:00,744 INFO L495 AbstractCegarLoop]: Abstraction has 5355 states and 8422 transitions. [2022-11-26 01:02:00,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-26 01:02:00,744 INFO L276 IsEmpty]: Start isEmpty. Operand 5355 states and 8422 transitions. [2022-11-26 01:02:00,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-26 01:02:00,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:00,748 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:00,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:00,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:00,957 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:00,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:00,958 INFO L85 PathProgramCache]: Analyzing trace with hash -655649081, now seen corresponding path program 1 times [2022-11-26 01:02:00,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:00,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197934939] [2022-11-26 01:02:00,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:00,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:02:01,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:01,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197934939] [2022-11-26 01:02:01,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197934939] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:01,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149470283] [2022-11-26 01:02:01,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:01,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:01,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:01,759 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:01,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:02:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:02,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 1834 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:02:02,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:02:02,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:02,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149470283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:02,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:02,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-26 01:02:02,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116251624] [2022-11-26 01:02:02,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:02,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:02:02,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:02,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:02:02,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-26 01:02:02,366 INFO L87 Difference]: Start difference. First operand 5355 states and 8422 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-26 01:02:03,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:03,132 INFO L93 Difference]: Finished difference Result 10563 states and 16976 transitions. [2022-11-26 01:02:03,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:02:03,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 93 [2022-11-26 01:02:03,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:03,205 INFO L225 Difference]: With dead ends: 10563 [2022-11-26 01:02:03,205 INFO L226 Difference]: Without dead ends: 6435 [2022-11-26 01:02:03,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:02:03,243 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 177 mSDsluCounter, 1786 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2426 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:03,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2426 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:02:03,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6435 states. [2022-11-26 01:02:03,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6435 to 5400. [2022-11-26 01:02:03,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5400 states, 3784 states have (on average 1.4936575052854122) internal successors, (5652), 3995 states have internal predecessors, (5652), 1238 states have call successors, (1238), 354 states have call predecessors, (1238), 377 states have return successors, (1577), 1156 states have call predecessors, (1577), 1227 states have call successors, (1577) [2022-11-26 01:02:03,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5400 states to 5400 states and 8467 transitions. [2022-11-26 01:02:03,907 INFO L78 Accepts]: Start accepts. Automaton has 5400 states and 8467 transitions. Word has length 93 [2022-11-26 01:02:03,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:03,908 INFO L495 AbstractCegarLoop]: Abstraction has 5400 states and 8467 transitions. [2022-11-26 01:02:03,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-26 01:02:03,909 INFO L276 IsEmpty]: Start isEmpty. Operand 5400 states and 8467 transitions. [2022-11-26 01:02:03,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-26 01:02:03,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:03,913 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 01:02:03,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:04,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:04,123 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:04,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:04,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1470715232, now seen corresponding path program 1 times [2022-11-26 01:02:04,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:04,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341362703] [2022-11-26 01:02:04,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:04,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:04,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 01:02:04,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:04,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341362703] [2022-11-26 01:02:04,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341362703] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:04,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652245852] [2022-11-26 01:02:04,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:04,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:04,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:04,930 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:04,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:02:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:05,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 01:02:05,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:02:05,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 01:02:06,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652245852] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:06,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:02:06,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 22 [2022-11-26 01:02:06,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864976002] [2022-11-26 01:02:06,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:06,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 01:02:06,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:06,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 01:02:06,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-11-26 01:02:06,470 INFO L87 Difference]: Start difference. First operand 5400 states and 8467 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-11-26 01:02:10,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:10,198 INFO L93 Difference]: Finished difference Result 10625 states and 16858 transitions. [2022-11-26 01:02:10,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 01:02:10,199 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 95 [2022-11-26 01:02:10,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:10,252 INFO L225 Difference]: With dead ends: 10625 [2022-11-26 01:02:10,252 INFO L226 Difference]: Without dead ends: 6476 [2022-11-26 01:02:10,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 177 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2022-11-26 01:02:10,280 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 1263 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 2484 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 2371 SdHoareTripleChecker+Invalid, 2718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 2484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:10,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1350 Valid, 2371 Invalid, 2718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 2484 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-26 01:02:10,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6476 states. [2022-11-26 01:02:10,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6476 to 5601. [2022-11-26 01:02:10,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5601 states, 3908 states have (on average 1.4820880245649948) internal successors, (5792), 4119 states have internal predecessors, (5792), 1276 states have call successors, (1276), 360 states have call predecessors, (1276), 416 states have return successors, (1722), 1224 states have call predecessors, (1722), 1265 states have call successors, (1722) [2022-11-26 01:02:10,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5601 states to 5601 states and 8790 transitions. [2022-11-26 01:02:10,908 INFO L78 Accepts]: Start accepts. Automaton has 5601 states and 8790 transitions. Word has length 95 [2022-11-26 01:02:10,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:10,910 INFO L495 AbstractCegarLoop]: Abstraction has 5601 states and 8790 transitions. [2022-11-26 01:02:10,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-11-26 01:02:10,910 INFO L276 IsEmpty]: Start isEmpty. Operand 5601 states and 8790 transitions. [2022-11-26 01:02:10,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-26 01:02:10,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:10,916 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 01:02:10,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:11,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-26 01:02:11,125 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:11,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:11,125 INFO L85 PathProgramCache]: Analyzing trace with hash 80209181, now seen corresponding path program 1 times [2022-11-26 01:02:11,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:11,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362007532] [2022-11-26 01:02:11,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:11,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 01:02:11,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:11,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362007532] [2022-11-26 01:02:11,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362007532] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:11,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290301971] [2022-11-26 01:02:11,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:11,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:11,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:11,888 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:11,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:02:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:12,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 01:02:12,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:12,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:02:12,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 01:02:13,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290301971] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:13,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:02:13,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 9] total 21 [2022-11-26 01:02:13,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029132179] [2022-11-26 01:02:13,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:13,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 01:02:13,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:13,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 01:02:13,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-26 01:02:13,332 INFO L87 Difference]: Start difference. First operand 5601 states and 8790 transitions. Second operand has 10 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-26 01:02:19,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:19,601 INFO L93 Difference]: Finished difference Result 16125 states and 27823 transitions. [2022-11-26 01:02:19,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 01:02:19,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 97 [2022-11-26 01:02:19,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:19,691 INFO L225 Difference]: With dead ends: 16125 [2022-11-26 01:02:19,692 INFO L226 Difference]: Without dead ends: 12378 [2022-11-26 01:02:19,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 01:02:19,741 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 3133 mSDsluCounter, 2531 mSDsCounter, 0 mSdLazyCounter, 3103 mSolverCounterSat, 1532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3232 SdHoareTripleChecker+Valid, 3293 SdHoareTripleChecker+Invalid, 4635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1532 IncrementalHoareTripleChecker+Valid, 3103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:19,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3232 Valid, 3293 Invalid, 4635 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1532 Valid, 3103 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-26 01:02:19,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12378 states. [2022-11-26 01:02:20,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12378 to 10919. [2022-11-26 01:02:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10919 states, 7728 states have (on average 1.4887422360248448) internal successors, (11505), 8079 states have internal predecessors, (11505), 2354 states have call successors, (2354), 684 states have call predecessors, (2354), 836 states have return successors, (3983), 2315 states have call predecessors, (3983), 2337 states have call successors, (3983) [2022-11-26 01:02:21,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10919 states to 10919 states and 17842 transitions. [2022-11-26 01:02:21,036 INFO L78 Accepts]: Start accepts. Automaton has 10919 states and 17842 transitions. Word has length 97 [2022-11-26 01:02:21,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:21,037 INFO L495 AbstractCegarLoop]: Abstraction has 10919 states and 17842 transitions. [2022-11-26 01:02:21,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-26 01:02:21,037 INFO L276 IsEmpty]: Start isEmpty. Operand 10919 states and 17842 transitions. [2022-11-26 01:02:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-26 01:02:21,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:21,044 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 01:02:21,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:21,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:21,255 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:21,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:21,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1149478830, now seen corresponding path program 1 times [2022-11-26 01:02:21,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:21,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048870663] [2022-11-26 01:02:21,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:21,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 01:02:22,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:22,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048870663] [2022-11-26 01:02:22,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048870663] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:22,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833678234] [2022-11-26 01:02:22,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:22,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:22,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:22,043 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:22,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:02:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:22,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1856 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:02:22,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:22,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:02:22,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 01:02:23,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833678234] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:23,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:02:23,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 17 [2022-11-26 01:02:23,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916540017] [2022-11-26 01:02:23,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:23,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:02:23,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:23,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:02:23,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-26 01:02:23,151 INFO L87 Difference]: Start difference. First operand 10919 states and 17842 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-26 01:02:26,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:26,354 INFO L93 Difference]: Finished difference Result 21469 states and 35624 transitions. [2022-11-26 01:02:26,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:02:26,355 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 102 [2022-11-26 01:02:26,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:26,449 INFO L225 Difference]: With dead ends: 21469 [2022-11-26 01:02:26,449 INFO L226 Difference]: Without dead ends: 12404 [2022-11-26 01:02:26,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 195 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-11-26 01:02:26,514 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 1189 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 1938 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1285 SdHoareTripleChecker+Valid, 2116 SdHoareTripleChecker+Invalid, 2188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:26,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1285 Valid, 2116 Invalid, 2188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1938 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-26 01:02:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12404 states. [2022-11-26 01:02:27,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12404 to 10907. [2022-11-26 01:02:27,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10907 states, 7728 states have (on average 1.4887422360248448) internal successors, (11505), 8067 states have internal predecessors, (11505), 2342 states have call successors, (2342), 684 states have call predecessors, (2342), 836 states have return successors, (3947), 2315 states have call predecessors, (3947), 2325 states have call successors, (3947) [2022-11-26 01:02:27,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10907 states to 10907 states and 17794 transitions. [2022-11-26 01:02:27,761 INFO L78 Accepts]: Start accepts. Automaton has 10907 states and 17794 transitions. Word has length 102 [2022-11-26 01:02:27,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:27,761 INFO L495 AbstractCegarLoop]: Abstraction has 10907 states and 17794 transitions. [2022-11-26 01:02:27,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-26 01:02:27,762 INFO L276 IsEmpty]: Start isEmpty. Operand 10907 states and 17794 transitions. [2022-11-26 01:02:27,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-26 01:02:27,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:27,771 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-26 01:02:27,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:27,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 01:02:27,983 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:27,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:27,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1515366247, now seen corresponding path program 1 times [2022-11-26 01:02:27,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:27,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430291730] [2022-11-26 01:02:27,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:27,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-26 01:02:28,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:28,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430291730] [2022-11-26 01:02:28,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430291730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:28,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469146957] [2022-11-26 01:02:28,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:28,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:28,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:28,779 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:28,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 01:02:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:29,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 1965 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:02:29,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 01:02:29,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:29,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469146957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:29,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:29,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-26 01:02:29,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574754118] [2022-11-26 01:02:29,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:29,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:02:29,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:29,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:02:29,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:02:29,344 INFO L87 Difference]: Start difference. First operand 10907 states and 17794 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-26 01:02:30,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:30,618 INFO L93 Difference]: Finished difference Result 21001 states and 35495 transitions. [2022-11-26 01:02:30,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:02:30,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 131 [2022-11-26 01:02:30,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:30,706 INFO L225 Difference]: With dead ends: 21001 [2022-11-26 01:02:30,706 INFO L226 Difference]: Without dead ends: 11363 [2022-11-26 01:02:30,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:02:30,784 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 2 mSDsluCounter, 2996 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3603 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:30,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3603 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:02:30,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11363 states. [2022-11-26 01:02:31,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11363 to 11237. [2022-11-26 01:02:31,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11237 states, 7950 states have (on average 1.4750943396226415) internal successors, (11727), 8313 states have internal predecessors, (11727), 2342 states have call successors, (2342), 684 states have call predecessors, (2342), 944 states have return successors, (4631), 2399 states have call predecessors, (4631), 2325 states have call successors, (4631) [2022-11-26 01:02:31,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11237 states to 11237 states and 18700 transitions. [2022-11-26 01:02:31,969 INFO L78 Accepts]: Start accepts. Automaton has 11237 states and 18700 transitions. Word has length 131 [2022-11-26 01:02:31,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:31,970 INFO L495 AbstractCegarLoop]: Abstraction has 11237 states and 18700 transitions. [2022-11-26 01:02:31,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-26 01:02:31,971 INFO L276 IsEmpty]: Start isEmpty. Operand 11237 states and 18700 transitions. [2022-11-26 01:02:31,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-26 01:02:31,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:31,977 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 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] [2022-11-26 01:02:31,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:32,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 01:02:32,187 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:32,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:32,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1069538174, now seen corresponding path program 1 times [2022-11-26 01:02:32,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:32,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319305266] [2022-11-26 01:02:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:32,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 01:02:33,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:33,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319305266] [2022-11-26 01:02:33,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319305266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:33,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830465854] [2022-11-26 01:02:33,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:33,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:33,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:33,079 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:33,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 01:02:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:33,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 1965 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:02:33,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 01:02:33,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:33,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830465854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:33,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:33,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-26 01:02:33,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621828481] [2022-11-26 01:02:33,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:33,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:02:33,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:33,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:02:33,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:02:33,688 INFO L87 Difference]: Start difference. First operand 11237 states and 18700 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-26 01:02:35,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:35,191 INFO L93 Difference]: Finished difference Result 21541 states and 36855 transitions. [2022-11-26 01:02:35,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:02:35,192 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 127 [2022-11-26 01:02:35,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:35,285 INFO L225 Difference]: With dead ends: 21541 [2022-11-26 01:02:35,285 INFO L226 Difference]: Without dead ends: 11585 [2022-11-26 01:02:35,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:02:35,371 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 2 mSDsluCounter, 2980 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3583 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:35,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3583 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:02:35,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2022-11-26 01:02:36,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 11291. [2022-11-26 01:02:36,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11291 states, 8004 states have (on average 1.471889055472264) internal successors, (11781), 8313 states have internal predecessors, (11781), 2342 states have call successors, (2342), 684 states have call predecessors, (2342), 944 states have return successors, (4631), 2453 states have call predecessors, (4631), 2325 states have call successors, (4631) [2022-11-26 01:02:36,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11291 states to 11291 states and 18754 transitions. [2022-11-26 01:02:36,602 INFO L78 Accepts]: Start accepts. Automaton has 11291 states and 18754 transitions. Word has length 127 [2022-11-26 01:02:36,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:36,605 INFO L495 AbstractCegarLoop]: Abstraction has 11291 states and 18754 transitions. [2022-11-26 01:02:36,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-26 01:02:36,605 INFO L276 IsEmpty]: Start isEmpty. Operand 11291 states and 18754 transitions. [2022-11-26 01:02:36,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-26 01:02:36,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:36,613 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-26 01:02:36,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:36,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:36,822 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:36,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:36,823 INFO L85 PathProgramCache]: Analyzing trace with hash 747279465, now seen corresponding path program 1 times [2022-11-26 01:02:36,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:36,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116704155] [2022-11-26 01:02:36,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:36,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-26 01:02:37,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:37,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116704155] [2022-11-26 01:02:37,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116704155] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:37,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970227424] [2022-11-26 01:02:37,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:37,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:37,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:37,576 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:37,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 01:02:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:38,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 1964 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:02:38,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:38,292 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 01:02:38,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:38,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970227424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:38,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:38,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-26 01:02:38,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443202044] [2022-11-26 01:02:38,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:38,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:02:38,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:38,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:02:38,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:02:38,294 INFO L87 Difference]: Start difference. First operand 11291 states and 18754 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-26 01:02:39,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:39,403 INFO L93 Difference]: Finished difference Result 21649 states and 36963 transitions. [2022-11-26 01:02:39,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:02:39,403 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 131 [2022-11-26 01:02:39,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:39,497 INFO L225 Difference]: With dead ends: 21649 [2022-11-26 01:02:39,498 INFO L226 Difference]: Without dead ends: 11639 [2022-11-26 01:02:39,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:02:39,584 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 2 mSDsluCounter, 2996 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3603 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:39,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3603 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:02:39,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11639 states. [2022-11-26 01:02:40,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11639 to 11345. [2022-11-26 01:02:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11345 states, 8058 states have (on average 1.4687267311988086) internal successors, (11835), 8313 states have internal predecessors, (11835), 2342 states have call successors, (2342), 684 states have call predecessors, (2342), 944 states have return successors, (4631), 2507 states have call predecessors, (4631), 2325 states have call successors, (4631) [2022-11-26 01:02:40,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11345 states to 11345 states and 18808 transitions. [2022-11-26 01:02:40,602 INFO L78 Accepts]: Start accepts. Automaton has 11345 states and 18808 transitions. Word has length 131 [2022-11-26 01:02:40,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:40,603 INFO L495 AbstractCegarLoop]: Abstraction has 11345 states and 18808 transitions. [2022-11-26 01:02:40,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-26 01:02:40,603 INFO L276 IsEmpty]: Start isEmpty. Operand 11345 states and 18808 transitions. [2022-11-26 01:02:40,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-26 01:02:40,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:40,614 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 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] [2022-11-26 01:02:40,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:40,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:40,823 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:40,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:40,824 INFO L85 PathProgramCache]: Analyzing trace with hash 493118779, now seen corresponding path program 1 times [2022-11-26 01:02:40,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:40,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500385087] [2022-11-26 01:02:40,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:40,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 01:02:41,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:41,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500385087] [2022-11-26 01:02:41,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500385087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:41,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039575359] [2022-11-26 01:02:41,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:41,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:41,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:41,667 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:41,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 01:02:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:42,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 1971 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 01:02:42,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 01:02:42,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:42,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039575359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:42,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:42,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-26 01:02:42,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856387460] [2022-11-26 01:02:42,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:42,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:02:42,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:42,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:02:42,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-26 01:02:42,272 INFO L87 Difference]: Start difference. First operand 11345 states and 18808 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-26 01:02:43,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:43,738 INFO L93 Difference]: Finished difference Result 23541 states and 40497 transitions. [2022-11-26 01:02:43,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:02:43,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 138 [2022-11-26 01:02:43,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:43,842 INFO L225 Difference]: With dead ends: 23541 [2022-11-26 01:02:43,843 INFO L226 Difference]: Without dead ends: 11072 [2022-11-26 01:02:43,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-26 01:02:43,996 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 247 mSDsluCounter, 2290 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 2933 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:43,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 2933 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:02:44,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11072 states. [2022-11-26 01:02:45,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11072 to 11052. [2022-11-26 01:02:45,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11052 states, 7831 states have (on average 1.444387689950198) internal successors, (11311), 8088 states have internal predecessors, (11311), 2298 states have call successors, (2298), 678 states have call predecessors, (2298), 922 states have return successors, (4482), 2445 states have call predecessors, (4482), 2281 states have call successors, (4482) [2022-11-26 01:02:45,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11052 states to 11052 states and 18091 transitions. [2022-11-26 01:02:45,443 INFO L78 Accepts]: Start accepts. Automaton has 11052 states and 18091 transitions. Word has length 138 [2022-11-26 01:02:45,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:45,444 INFO L495 AbstractCegarLoop]: Abstraction has 11052 states and 18091 transitions. [2022-11-26 01:02:45,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-26 01:02:45,444 INFO L276 IsEmpty]: Start isEmpty. Operand 11052 states and 18091 transitions. [2022-11-26 01:02:45,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-26 01:02:45,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:45,460 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 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] [2022-11-26 01:02:45,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-26 01:02:45,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 01:02:45,672 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:45,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:45,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1472538997, now seen corresponding path program 1 times [2022-11-26 01:02:45,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:45,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308009912] [2022-11-26 01:02:45,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:45,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:46,596 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 01:02:46,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:46,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308009912] [2022-11-26 01:02:46,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308009912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:46,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211231820] [2022-11-26 01:02:46,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:46,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:46,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:46,599 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:46,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 01:02:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:47,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 1975 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 01:02:47,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 01:02:47,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:47,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211231820] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:47,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:47,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-26 01:02:47,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7521933] [2022-11-26 01:02:47,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:47,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:02:47,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:47,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:02:47,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-26 01:02:47,198 INFO L87 Difference]: Start difference. First operand 11052 states and 18091 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-26 01:02:48,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:48,381 INFO L93 Difference]: Finished difference Result 23842 states and 40130 transitions. [2022-11-26 01:02:48,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:02:48,382 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 142 [2022-11-26 01:02:48,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:48,489 INFO L225 Difference]: With dead ends: 23842 [2022-11-26 01:02:48,490 INFO L226 Difference]: Without dead ends: 13677 [2022-11-26 01:02:48,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-26 01:02:48,581 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 261 mSDsluCounter, 2296 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 2944 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:48,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 2944 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:02:48,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13677 states. [2022-11-26 01:02:49,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13677 to 13677. [2022-11-26 01:02:49,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13677 states, 10053 states have (on average 1.4727941907888193) internal successors, (14806), 10391 states have internal predecessors, (14806), 2578 states have call successors, (2578), 720 states have call predecessors, (2578), 1045 states have return successors, (4762), 2725 states have call predecessors, (4762), 2561 states have call successors, (4762) [2022-11-26 01:02:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13677 states to 13677 states and 22146 transitions. [2022-11-26 01:02:49,704 INFO L78 Accepts]: Start accepts. Automaton has 13677 states and 22146 transitions. Word has length 142 [2022-11-26 01:02:49,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:49,704 INFO L495 AbstractCegarLoop]: Abstraction has 13677 states and 22146 transitions. [2022-11-26 01:02:49,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-26 01:02:49,705 INFO L276 IsEmpty]: Start isEmpty. Operand 13677 states and 22146 transitions. [2022-11-26 01:02:49,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-26 01:02:49,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:49,799 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 01:02:49,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:50,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 01:02:50,008 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:50,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:50,009 INFO L85 PathProgramCache]: Analyzing trace with hash -293368477, now seen corresponding path program 1 times [2022-11-26 01:02:50,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:50,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392415357] [2022-11-26 01:02:50,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:50,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-26 01:02:50,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:50,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392415357] [2022-11-26 01:02:50,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392415357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:50,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192030533] [2022-11-26 01:02:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:50,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:50,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:50,695 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:50,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 01:02:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:51,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 1975 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 01:02:51,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 01:02:51,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:51,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192030533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:51,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:51,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2022-11-26 01:02:51,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14555238] [2022-11-26 01:02:51,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:51,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:02:51,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:51,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:02:51,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-26 01:02:51,437 INFO L87 Difference]: Start difference. First operand 13677 states and 22146 transitions. Second operand has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-26 01:02:54,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:54,243 INFO L93 Difference]: Finished difference Result 36088 states and 62057 transitions. [2022-11-26 01:02:54,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:02:54,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 143 [2022-11-26 01:02:54,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:54,398 INFO L225 Difference]: With dead ends: 36088 [2022-11-26 01:02:54,398 INFO L226 Difference]: Without dead ends: 22343 [2022-11-26 01:02:54,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-26 01:02:54,513 INFO L413 NwaCegarLoop]: 779 mSDtfsCounter, 623 mSDsluCounter, 2504 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 3283 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:54,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 3283 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 01:02:54,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22343 states. [2022-11-26 01:02:55,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22343 to 21026. [2022-11-26 01:02:55,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21026 states, 15450 states have (on average 1.4659546925566342) internal successors, (22649), 16015 states have internal predecessors, (22649), 3932 states have call successors, (3932), 1133 states have call predecessors, (3932), 1643 states have return successors, (8398), 4136 states have call predecessors, (8398), 3910 states have call successors, (8398) [2022-11-26 01:02:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21026 states to 21026 states and 34979 transitions. [2022-11-26 01:02:56,084 INFO L78 Accepts]: Start accepts. Automaton has 21026 states and 34979 transitions. Word has length 143 [2022-11-26 01:02:56,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:56,085 INFO L495 AbstractCegarLoop]: Abstraction has 21026 states and 34979 transitions. [2022-11-26 01:02:56,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-26 01:02:56,085 INFO L276 IsEmpty]: Start isEmpty. Operand 21026 states and 34979 transitions. [2022-11-26 01:02:56,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-26 01:02:56,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:56,101 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-26 01:02:56,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:56,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:56,312 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:56,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:56,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1821893157, now seen corresponding path program 1 times [2022-11-26 01:02:56,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:56,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702314862] [2022-11-26 01:02:56,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:56,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 01:02:56,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:56,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702314862] [2022-11-26 01:02:56,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702314862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:56,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:02:56,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 01:02:56,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479069127] [2022-11-26 01:02:56,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:56,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:02:56,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:56,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:02:56,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:02:56,685 INFO L87 Difference]: Start difference. First operand 21026 states and 34979 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-26 01:02:58,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:58,950 INFO L93 Difference]: Finished difference Result 40358 states and 68836 transitions. [2022-11-26 01:02:58,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:02:58,951 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 149 [2022-11-26 01:02:58,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:59,123 INFO L225 Difference]: With dead ends: 40358 [2022-11-26 01:02:59,123 INFO L226 Difference]: Without dead ends: 21814 [2022-11-26 01:02:59,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:02:59,317 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 2 mSDsluCounter, 2923 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3514 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:59,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3514 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:02:59,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21814 states. [2022-11-26 01:03:01,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21814 to 21567. [2022-11-26 01:03:01,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21567 states, 15797 states have (on average 1.455719440400076) internal successors, (22996), 16445 states have internal predecessors, (22996), 3928 states have call successors, (3928), 1133 states have call predecessors, (3928), 1841 states have return successors, (8768), 4247 states have call predecessors, (8768), 3906 states have call successors, (8768) [2022-11-26 01:03:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21567 states to 21567 states and 35692 transitions. [2022-11-26 01:03:01,308 INFO L78 Accepts]: Start accepts. Automaton has 21567 states and 35692 transitions. Word has length 149 [2022-11-26 01:03:01,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:01,309 INFO L495 AbstractCegarLoop]: Abstraction has 21567 states and 35692 transitions. [2022-11-26 01:03:01,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-26 01:03:01,309 INFO L276 IsEmpty]: Start isEmpty. Operand 21567 states and 35692 transitions. [2022-11-26 01:03:01,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-26 01:03:01,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:01,323 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 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, 1, 1, 1, 1, 1] [2022-11-26 01:03:01,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-26 01:03:01,324 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:01,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:01,324 INFO L85 PathProgramCache]: Analyzing trace with hash -415345974, now seen corresponding path program 1 times [2022-11-26 01:03:01,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:01,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552437693] [2022-11-26 01:03:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:01,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-26 01:03:01,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:01,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552437693] [2022-11-26 01:03:01,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552437693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:03:01,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354121581] [2022-11-26 01:03:01,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:01,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:01,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:03:01,876 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:03:01,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 01:03:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:02,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 1990 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-26 01:03:02,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:03:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 01:03:02,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:03:02,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354121581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:02,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:03:02,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2022-11-26 01:03:02,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664711344] [2022-11-26 01:03:02,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:02,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:03:02,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:02,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:03:02,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-11-26 01:03:02,691 INFO L87 Difference]: Start difference. First operand 21567 states and 35692 transitions. Second operand has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-26 01:03:06,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:06,264 INFO L93 Difference]: Finished difference Result 49395 states and 82968 transitions. [2022-11-26 01:03:06,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:03:06,265 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 152 [2022-11-26 01:03:06,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:06,609 INFO L225 Difference]: With dead ends: 49395 [2022-11-26 01:03:06,609 INFO L226 Difference]: Without dead ends: 27840 [2022-11-26 01:03:06,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-11-26 01:03:06,719 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 582 mSDsluCounter, 2499 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 3272 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:06,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 3272 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 01:03:06,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27840 states. [2022-11-26 01:03:08,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27840 to 26431. [2022-11-26 01:03:08,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26431 states, 19390 states have (on average 1.4486333161423415) internal successors, (28089), 20195 states have internal predecessors, (28089), 4804 states have call successors, (4804), 1369 states have call predecessors, (4804), 2236 states have return successors, (10304), 5182 states have call predecessors, (10304), 4778 states have call successors, (10304) [2022-11-26 01:03:08,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26431 states to 26431 states and 43197 transitions. [2022-11-26 01:03:08,813 INFO L78 Accepts]: Start accepts. Automaton has 26431 states and 43197 transitions. Word has length 152 [2022-11-26 01:03:08,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:08,814 INFO L495 AbstractCegarLoop]: Abstraction has 26431 states and 43197 transitions. [2022-11-26 01:03:08,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-26 01:03:08,814 INFO L276 IsEmpty]: Start isEmpty. Operand 26431 states and 43197 transitions. [2022-11-26 01:03:08,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-26 01:03:08,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:08,829 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2022-11-26 01:03:08,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 01:03:09,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 01:03:09,040 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:09,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:09,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1450245721, now seen corresponding path program 1 times [2022-11-26 01:03:09,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:09,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114856770] [2022-11-26 01:03:09,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:09,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-26 01:03:09,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:09,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114856770] [2022-11-26 01:03:09,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114856770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:03:09,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120278075] [2022-11-26 01:03:09,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:09,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:09,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:03:09,773 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:03:09,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 01:03:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:10,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 2014 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 01:03:10,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:03:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 01:03:10,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:03:10,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120278075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:10,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:03:10,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-11-26 01:03:10,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221611991] [2022-11-26 01:03:10,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:10,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:03:10,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:10,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:03:10,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:03:10,329 INFO L87 Difference]: Start difference. First operand 26431 states and 43197 transitions. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 6 states have internal predecessors, (108), 2 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-26 01:03:13,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:13,795 INFO L93 Difference]: Finished difference Result 54849 states and 95222 transitions. [2022-11-26 01:03:13,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 01:03:13,795 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 6 states have internal predecessors, (108), 2 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) Word has length 165 [2022-11-26 01:03:13,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:14,015 INFO L225 Difference]: With dead ends: 54849 [2022-11-26 01:03:14,015 INFO L226 Difference]: Without dead ends: 31649 [2022-11-26 01:03:14,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-11-26 01:03:14,237 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 509 mSDsluCounter, 3186 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 3900 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:14,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 3900 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 01:03:14,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31649 states. [2022-11-26 01:03:16,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31649 to 31349. [2022-11-26 01:03:16,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31349 states, 23168 states have (on average 1.4085376381215469) internal successors, (32633), 24097 states have internal predecessors, (32633), 5406 states have call successors, (5406), 1603 states have call predecessors, (5406), 2774 states have return successors, (13924), 5964 states have call predecessors, (13924), 5380 states have call successors, (13924) [2022-11-26 01:03:16,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31349 states to 31349 states and 51963 transitions. [2022-11-26 01:03:16,800 INFO L78 Accepts]: Start accepts. Automaton has 31349 states and 51963 transitions. Word has length 165 [2022-11-26 01:03:16,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:16,801 INFO L495 AbstractCegarLoop]: Abstraction has 31349 states and 51963 transitions. [2022-11-26 01:03:16,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 6 states have internal predecessors, (108), 2 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-26 01:03:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 31349 states and 51963 transitions. [2022-11-26 01:03:16,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-26 01:03:16,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:16,816 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:03:16,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 01:03:17,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:17,026 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:17,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:17,026 INFO L85 PathProgramCache]: Analyzing trace with hash 2077438142, now seen corresponding path program 1 times [2022-11-26 01:03:17,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:17,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017888551] [2022-11-26 01:03:17,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:17,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 01:03:17,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:17,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017888551] [2022-11-26 01:03:17,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017888551] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:03:17,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352996817] [2022-11-26 01:03:17,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:17,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:17,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:03:17,811 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:03:17,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 01:03:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:18,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 2006 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-26 01:03:18,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:03:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 01:03:18,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:03:18,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352996817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:18,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:03:18,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2022-11-26 01:03:18,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697332887] [2022-11-26 01:03:18,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:18,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:03:18,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:18,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:03:18,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-11-26 01:03:18,740 INFO L87 Difference]: Start difference. First operand 31349 states and 51963 transitions. Second operand has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-26 01:03:22,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:22,061 INFO L93 Difference]: Finished difference Result 63190 states and 106628 transitions. [2022-11-26 01:03:22,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:03:22,061 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 158 [2022-11-26 01:03:22,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:22,253 INFO L225 Difference]: With dead ends: 63190 [2022-11-26 01:03:22,254 INFO L226 Difference]: Without dead ends: 31853 [2022-11-26 01:03:22,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-11-26 01:03:22,414 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 564 mSDsluCounter, 2464 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 3226 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:22,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 3226 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 01:03:22,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31853 states. [2022-11-26 01:03:24,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31853 to 30321. [2022-11-26 01:03:24,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30321 states, 22442 states have (on average 1.4072720791373319) internal successors, (31582), 23338 states have internal predecessors, (31582), 5220 states have call successors, (5220), 1562 states have call predecessors, (5220), 2658 states have return successors, (13339), 5728 states have call predecessors, (13339), 5194 states have call successors, (13339) [2022-11-26 01:03:24,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30321 states to 30321 states and 50141 transitions. [2022-11-26 01:03:24,918 INFO L78 Accepts]: Start accepts. Automaton has 30321 states and 50141 transitions. Word has length 158 [2022-11-26 01:03:24,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:24,919 INFO L495 AbstractCegarLoop]: Abstraction has 30321 states and 50141 transitions. [2022-11-26 01:03:24,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-26 01:03:24,919 INFO L276 IsEmpty]: Start isEmpty. Operand 30321 states and 50141 transitions. [2022-11-26 01:03:24,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-26 01:03:24,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:24,929 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-26 01:03:24,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-26 01:03:25,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-26 01:03:25,139 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:25,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:25,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2094359317, now seen corresponding path program 1 times [2022-11-26 01:03:25,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:25,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986902570] [2022-11-26 01:03:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:25,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-26 01:03:25,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:25,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986902570] [2022-11-26 01:03:25,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986902570] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:03:25,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251833548] [2022-11-26 01:03:25,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:25,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:25,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:03:25,450 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:03:25,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d93c79a4-829a-4985-9fec-8f586b95fee6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 01:03:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:25,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 2418 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:03:25,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:03:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 01:03:26,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:03:26,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251833548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:26,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:03:26,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-26 01:03:26,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750471430] [2022-11-26 01:03:26,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:26,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:03:26,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:26,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:03:26,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-26 01:03:26,096 INFO L87 Difference]: Start difference. First operand 30321 states and 50141 transitions. Second operand has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 5 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25)