./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f6cc861ca86011eb32ffd09a18c7045c0cb28e684d3b73d1659bc499a4213e84 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:53:52,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:53:52,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:53:52,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:53:52,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:53:52,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:53:52,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:53:52,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:53:52,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:53:52,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:53:52,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:53:52,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:53:52,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:53:52,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:53:52,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:53:52,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:53:52,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:53:52,210 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:53:52,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:53:52,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:53:52,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:53:52,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:53:52,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:53:52,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:53:52,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:53:52,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:53:52,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:53:52,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:53:52,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:53:52,244 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:53:52,245 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:53:52,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:53:52,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:53:52,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:53:52,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:53:52,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:53:52,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:53:52,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:53:52,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:53:52,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:53:52,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:53:52,257 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:53:52,306 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:53:52,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:53:52,307 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:53:52,307 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:53:52,308 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:53:52,309 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:53:52,309 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:53:52,309 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:53:52,309 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:53:52,310 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:53:52,311 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:53:52,311 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:53:52,311 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:53:52,311 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:53:52,312 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:53:52,312 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:53:52,312 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:53:52,313 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:53:52,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:53:52,314 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:53:52,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:53:52,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:53:52,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:53:52,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:53:52,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:53:52,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:53:52,316 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:53:52,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:53:52,317 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:53:52,317 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:53:52,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:53:52,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:53:52,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:53:52,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:53:52,318 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:53:52,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:53:52,319 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:53:52,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:53:52,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:53:52,319 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:53:52,320 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:53:52,320 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6cc861ca86011eb32ffd09a18c7045c0cb28e684d3b73d1659bc499a4213e84 [2021-11-25 19:53:52,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:53:52,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:53:52,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:53:52,709 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:53:52,709 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:53:52,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c [2021-11-25 19:53:52,793 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/data/9a324b4db/e1beba0dc9e44ebba6dce5d35cacf264/FLAG4af22fd94 [2021-11-25 19:53:53,620 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:53:53,621 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c [2021-11-25 19:53:53,654 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/data/9a324b4db/e1beba0dc9e44ebba6dce5d35cacf264/FLAG4af22fd94 [2021-11-25 19:53:53,806 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/data/9a324b4db/e1beba0dc9e44ebba6dce5d35cacf264 [2021-11-25 19:53:53,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:53:53,811 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:53:53,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:53:53,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:53:53,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:53:53,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:53:53" (1/1) ... [2021-11-25 19:53:53,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2db9fcf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:53, skipping insertion in model container [2021-11-25 19:53:53,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:53:53" (1/1) ... [2021-11-25 19:53:53,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:53:53,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:53:54,549 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2021-11-25 19:53:54,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:53:54,564 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:53:54,708 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2021-11-25 19:53:54,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:53:54,748 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:53:54,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:54 WrapperNode [2021-11-25 19:53:54,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:53:54,751 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:53:54,751 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:53:54,751 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:53:54,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:54" (1/1) ... [2021-11-25 19:53:54,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:54" (1/1) ... [2021-11-25 19:53:54,902 INFO L137 Inliner]: procedures = 93, calls = 339, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 1060 [2021-11-25 19:53:54,903 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:53:54,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:53:54,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:53:54,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:53:54,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:54" (1/1) ... [2021-11-25 19:53:54,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:54" (1/1) ... [2021-11-25 19:53:54,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:54" (1/1) ... [2021-11-25 19:53:54,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:54" (1/1) ... [2021-11-25 19:53:54,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:54" (1/1) ... [2021-11-25 19:53:55,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:54" (1/1) ... [2021-11-25 19:53:55,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:54" (1/1) ... [2021-11-25 19:53:55,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:53:55,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:53:55,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:53:55,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:53:55,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:54" (1/1) ... [2021-11-25 19:53:55,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:53:55,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:53:55,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:53:55,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:53:55,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:53:55,215 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-25 19:53:55,215 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-25 19:53:55,215 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-25 19:53:55,215 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-25 19:53:55,215 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-25 19:53:55,215 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-25 19:53:55,216 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 19:53:55,216 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 19:53:55,216 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-25 19:53:55,216 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-25 19:53:55,216 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 19:53:55,217 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 19:53:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-25 19:53:55,217 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-25 19:53:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 19:53:55,217 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 19:53:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 19:53:55,218 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 19:53:55,240 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 19:53:55,240 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 19:53:55,241 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-25 19:53:55,241 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-25 19:53:55,241 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 19:53:55,241 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 19:53:55,241 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 19:53:55,242 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 19:53:55,242 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 19:53:55,242 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 19:53:55,242 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-25 19:53:55,243 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-25 19:53:55,243 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 19:53:55,243 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 19:53:55,243 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 19:53:55,244 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 19:53:55,244 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 19:53:55,244 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 19:53:55,244 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 19:53:55,244 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 19:53:55,244 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 19:53:55,244 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 19:53:55,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:53:55,245 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 19:53:55,245 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 19:53:55,246 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 19:53:55,246 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 19:53:55,247 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 19:53:55,248 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 19:53:55,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:53:55,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:53:55,250 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 19:53:55,250 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 19:53:55,250 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-25 19:53:55,250 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-25 19:53:55,493 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:53:55,495 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:53:56,672 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:53:57,393 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:53:57,393 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:53:57,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:53:57 BoogieIcfgContainer [2021-11-25 19:53:57,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:53:57,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:53:57,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:53:57,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:53:57,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:53:53" (1/3) ... [2021-11-25 19:53:57,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ab841e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:53:57, skipping insertion in model container [2021-11-25 19:53:57,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:53:54" (2/3) ... [2021-11-25 19:53:57,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ab841e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:53:57, skipping insertion in model container [2021-11-25 19:53:57,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:53:57" (3/3) ... [2021-11-25 19:53:57,411 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product20.cil.c [2021-11-25 19:53:57,417 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:53:57,418 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:53:57,495 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:53:57,504 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:53:57,505 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:53:57,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 366 states, 242 states have (on average 1.56198347107438) internal successors, (378), 260 states have internal predecessors, (378), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-25 19:53:57,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-25 19:53:57,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:57,570 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:53:57,570 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:53:57,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:57,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1511069101, now seen corresponding path program 1 times [2021-11-25 19:53:57,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:53:57,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303542674] [2021-11-25 19:53:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:57,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:53:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:53:58,039 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:53:58,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303542674] [2021-11-25 19:53:58,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303542674] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:53:58,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:53:58,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:53:58,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888269366] [2021-11-25 19:53:58,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:53:58,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:53:58,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:53:58,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:53:58,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:53:58,099 INFO L87 Difference]: Start difference. First operand has 366 states, 242 states have (on average 1.56198347107438) internal successors, (378), 260 states have internal predecessors, (378), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-25 19:53:58,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:58,650 INFO L93 Difference]: Finished difference Result 1074 states and 1705 transitions. [2021-11-25 19:53:58,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:53:58,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2021-11-25 19:53:58,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:58,697 INFO L225 Difference]: With dead ends: 1074 [2021-11-25 19:53:58,697 INFO L226 Difference]: Without dead ends: 709 [2021-11-25 19:53:58,710 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:53:58,716 INFO L933 BasicCegarLoop]: 679 mSDtfsCounter, 546 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:53:58,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 1198 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:53:58,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-11-25 19:53:58,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 673. [2021-11-25 19:53:58,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 459 states have (on average 1.5642701525054465) internal successors, (718), 485 states have internal predecessors, (718), 170 states have call successors, (170), 45 states have call predecessors, (170), 43 states have return successors, (175), 157 states have call predecessors, (175), 168 states have call successors, (175) [2021-11-25 19:53:58,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1063 transitions. [2021-11-25 19:53:58,900 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1063 transitions. Word has length 43 [2021-11-25 19:53:58,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:58,902 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 1063 transitions. [2021-11-25 19:53:58,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-25 19:53:58,904 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1063 transitions. [2021-11-25 19:53:58,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-25 19:53:58,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:58,931 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:53:58,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:53:58,932 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:53:58,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:58,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1681850943, now seen corresponding path program 1 times [2021-11-25 19:53:58,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:53:58,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684547737] [2021-11-25 19:53:58,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:58,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:53:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:53:59,231 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:53:59,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684547737] [2021-11-25 19:53:59,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684547737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:53:59,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:53:59,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:53:59,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143096397] [2021-11-25 19:53:59,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:53:59,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:53:59,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:53:59,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:53:59,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:53:59,236 INFO L87 Difference]: Start difference. First operand 673 states and 1063 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-25 19:54:02,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:02,013 INFO L93 Difference]: Finished difference Result 2177 states and 3481 transitions. [2021-11-25 19:54:02,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:54:02,014 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2021-11-25 19:54:02,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:02,034 INFO L225 Difference]: With dead ends: 2177 [2021-11-25 19:54:02,034 INFO L226 Difference]: Without dead ends: 1516 [2021-11-25 19:54:02,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:54:02,042 INFO L933 BasicCegarLoop]: 559 mSDtfsCounter, 1074 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 2388 mSolverCounterSat, 475 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 475 IncrementalHoareTripleChecker+Valid, 2388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:02,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1165 Valid, 1547 Invalid, 2863 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [475 Valid, 2388 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 19:54:02,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-11-25 19:54:02,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1374. [2021-11-25 19:54:02,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 940 states have (on average 1.5606382978723403) internal successors, (1467), 991 states have internal predecessors, (1467), 340 states have call successors, (340), 91 states have call predecessors, (340), 93 states have return successors, (384), 318 states have call predecessors, (384), 336 states have call successors, (384) [2021-11-25 19:54:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2191 transitions. [2021-11-25 19:54:02,246 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2191 transitions. Word has length 87 [2021-11-25 19:54:02,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:02,249 INFO L470 AbstractCegarLoop]: Abstraction has 1374 states and 2191 transitions. [2021-11-25 19:54:02,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-25 19:54:02,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2191 transitions. [2021-11-25 19:54:02,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-25 19:54:02,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:02,258 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:02,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:54:02,258 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:02,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:02,259 INFO L85 PathProgramCache]: Analyzing trace with hash -337662260, now seen corresponding path program 1 times [2021-11-25 19:54:02,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:02,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365228522] [2021-11-25 19:54:02,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:02,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 19:54:02,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:02,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365228522] [2021-11-25 19:54:02,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365228522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:54:02,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:54:02,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 19:54:02,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069575114] [2021-11-25 19:54:02,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:54:02,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:54:02,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:02,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:54:02,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:54:02,490 INFO L87 Difference]: Start difference. First operand 1374 states and 2191 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-25 19:54:05,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:05,443 INFO L93 Difference]: Finished difference Result 2024 states and 3264 transitions. [2021-11-25 19:54:05,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 19:54:05,444 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2021-11-25 19:54:05,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:05,470 INFO L225 Difference]: With dead ends: 2024 [2021-11-25 19:54:05,470 INFO L226 Difference]: Without dead ends: 2022 [2021-11-25 19:54:05,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-11-25 19:54:05,482 INFO L933 BasicCegarLoop]: 700 mSDtfsCounter, 1385 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 2876 mSolverCounterSat, 822 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 2326 SdHoareTripleChecker+Invalid, 3698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 822 IncrementalHoareTripleChecker+Valid, 2876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:05,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1407 Valid, 2326 Invalid, 3698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [822 Valid, 2876 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-25 19:54:05,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-11-25 19:54:05,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1784. [2021-11-25 19:54:05,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1173 states have (on average 1.5123614663256606) internal successors, (1774), 1249 states have internal predecessors, (1774), 483 states have call successors, (483), 121 states have call predecessors, (483), 127 states have return successors, (551), 452 states have call predecessors, (551), 477 states have call successors, (551) [2021-11-25 19:54:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2808 transitions. [2021-11-25 19:54:05,714 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2808 transitions. Word has length 91 [2021-11-25 19:54:05,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:05,716 INFO L470 AbstractCegarLoop]: Abstraction has 1784 states and 2808 transitions. [2021-11-25 19:54:05,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-25 19:54:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2808 transitions. [2021-11-25 19:54:05,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-25 19:54:05,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:05,727 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2021-11-25 19:54:05,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:54:05,727 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:05,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:05,728 INFO L85 PathProgramCache]: Analyzing trace with hash 845153710, now seen corresponding path program 1 times [2021-11-25 19:54:05,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:05,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658407155] [2021-11-25 19:54:05,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:05,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:05,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-25 19:54:05,900 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:05,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658407155] [2021-11-25 19:54:05,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658407155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:05,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258303571] [2021-11-25 19:54:05,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:05,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:05,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:05,908 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:05,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:54:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:06,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 1509 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:54:06,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-25 19:54:06,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:54:06,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258303571] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:54:06,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:54:06,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-25 19:54:06,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575165838] [2021-11-25 19:54:06,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:54:06,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:54:06,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:06,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:54:06,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:54:06,775 INFO L87 Difference]: Start difference. First operand 1784 states and 2808 transitions. Second operand has 6 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-25 19:54:07,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:07,485 INFO L93 Difference]: Finished difference Result 3555 states and 5629 transitions. [2021-11-25 19:54:07,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:54:07,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 121 [2021-11-25 19:54:07,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:07,505 INFO L225 Difference]: With dead ends: 3555 [2021-11-25 19:54:07,505 INFO L226 Difference]: Without dead ends: 1782 [2021-11-25 19:54:07,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:54:07,524 INFO L933 BasicCegarLoop]: 583 mSDtfsCounter, 375 mSDsluCounter, 2007 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 2469 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:07,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 2469 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:54:07,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2021-11-25 19:54:07,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1780. [2021-11-25 19:54:07,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1173 states have (on average 1.5089514066496164) internal successors, (1770), 1245 states have internal predecessors, (1770), 479 states have call successors, (479), 121 states have call predecessors, (479), 127 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2021-11-25 19:54:07,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2788 transitions. [2021-11-25 19:54:07,716 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2788 transitions. Word has length 121 [2021-11-25 19:54:07,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:07,716 INFO L470 AbstractCegarLoop]: Abstraction has 1780 states and 2788 transitions. [2021-11-25 19:54:07,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-25 19:54:07,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2788 transitions. [2021-11-25 19:54:07,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 19:54:07,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:07,729 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2021-11-25 19:54:07,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:07,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:07,951 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:07,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:07,951 INFO L85 PathProgramCache]: Analyzing trace with hash -554502647, now seen corresponding path program 1 times [2021-11-25 19:54:07,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:07,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943094573] [2021-11-25 19:54:07,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:07,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-25 19:54:08,051 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:08,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943094573] [2021-11-25 19:54:08,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943094573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:54:08,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:54:08,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:54:08,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103826847] [2021-11-25 19:54:08,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:54:08,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:54:08,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:08,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:54:08,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:54:08,054 INFO L87 Difference]: Start difference. First operand 1780 states and 2788 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-25 19:54:08,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:08,331 INFO L93 Difference]: Finished difference Result 3646 states and 5774 transitions. [2021-11-25 19:54:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:54:08,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 122 [2021-11-25 19:54:08,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:08,352 INFO L225 Difference]: With dead ends: 3646 [2021-11-25 19:54:08,352 INFO L226 Difference]: Without dead ends: 1878 [2021-11-25 19:54:08,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:54:08,369 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 30 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1567 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:08,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1567 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:54:08,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2021-11-25 19:54:08,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1792. [2021-11-25 19:54:08,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1185 states have (on average 1.5037974683544304) internal successors, (1782), 1257 states have internal predecessors, (1782), 479 states have call successors, (479), 121 states have call predecessors, (479), 127 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2021-11-25 19:54:08,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 2800 transitions. [2021-11-25 19:54:08,542 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 2800 transitions. Word has length 122 [2021-11-25 19:54:08,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:08,542 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 2800 transitions. [2021-11-25 19:54:08,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-25 19:54:08,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 2800 transitions. [2021-11-25 19:54:08,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-25 19:54:08,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:08,549 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:08,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:54:08,549 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:08,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:08,550 INFO L85 PathProgramCache]: Analyzing trace with hash 530590405, now seen corresponding path program 1 times [2021-11-25 19:54:08,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:08,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155469897] [2021-11-25 19:54:08,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:08,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-25 19:54:08,700 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:08,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155469897] [2021-11-25 19:54:08,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155469897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:08,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545636263] [2021-11-25 19:54:08,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:08,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:08,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:08,707 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:08,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:54:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:09,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 1518 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:54:09,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-25 19:54:09,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:54:09,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545636263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:54:09,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:54:09,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-11-25 19:54:09,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746220118] [2021-11-25 19:54:09,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:54:09,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:54:09,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:09,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:54:09,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:54:09,278 INFO L87 Difference]: Start difference. First operand 1792 states and 2800 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 19:54:09,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:09,714 INFO L93 Difference]: Finished difference Result 3728 states and 5948 transitions. [2021-11-25 19:54:09,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:54:09,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 125 [2021-11-25 19:54:09,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:09,741 INFO L225 Difference]: With dead ends: 3728 [2021-11-25 19:54:09,742 INFO L226 Difference]: Without dead ends: 1948 [2021-11-25 19:54:09,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:54:09,760 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 213 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:09,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1359 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:54:09,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-11-25 19:54:09,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1948. [2021-11-25 19:54:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1337 states have (on average 1.5512341062079282) internal successors, (2074), 1409 states have internal predecessors, (2074), 479 states have call successors, (479), 125 states have call predecessors, (479), 131 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2021-11-25 19:54:09,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 3092 transitions. [2021-11-25 19:54:09,970 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 3092 transitions. Word has length 125 [2021-11-25 19:54:09,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:09,972 INFO L470 AbstractCegarLoop]: Abstraction has 1948 states and 3092 transitions. [2021-11-25 19:54:09,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 19:54:09,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 3092 transitions. [2021-11-25 19:54:09,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-25 19:54:09,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:09,982 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:10,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:10,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:10,203 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:10,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:10,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1414446969, now seen corresponding path program 1 times [2021-11-25 19:54:10,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:10,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202205660] [2021-11-25 19:54:10,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:10,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-25 19:54:10,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:10,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202205660] [2021-11-25 19:54:10,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202205660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:10,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497730657] [2021-11-25 19:54:10,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:10,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:10,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:10,399 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:10,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:54:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:10,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 1523 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:54:10,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 19:54:11,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:54:11,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497730657] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:54:11,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:54:11,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 19:54:11,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733440127] [2021-11-25 19:54:11,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:54:11,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:54:11,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:11,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:54:11,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:54:11,184 INFO L87 Difference]: Start difference. First operand 1948 states and 3092 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 19:54:11,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:11,621 INFO L93 Difference]: Finished difference Result 4040 states and 6526 transitions. [2021-11-25 19:54:11,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:54:11,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 130 [2021-11-25 19:54:11,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:11,644 INFO L225 Difference]: With dead ends: 4040 [2021-11-25 19:54:11,644 INFO L226 Difference]: Without dead ends: 2104 [2021-11-25 19:54:11,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:54:11,662 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 211 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:11,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1359 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:54:11,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-11-25 19:54:11,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2104. [2021-11-25 19:54:11,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 1489 states have (on average 1.5889858965748824) internal successors, (2366), 1561 states have internal predecessors, (2366), 479 states have call successors, (479), 129 states have call predecessors, (479), 135 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2021-11-25 19:54:11,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 3384 transitions. [2021-11-25 19:54:11,854 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 3384 transitions. Word has length 130 [2021-11-25 19:54:11,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:11,854 INFO L470 AbstractCegarLoop]: Abstraction has 2104 states and 3384 transitions. [2021-11-25 19:54:11,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 19:54:11,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 3384 transitions. [2021-11-25 19:54:11,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-25 19:54:11,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:11,862 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:11,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:12,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:12,075 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:12,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:12,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1716168489, now seen corresponding path program 1 times [2021-11-25 19:54:12,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:12,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710613944] [2021-11-25 19:54:12,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:12,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:12,204 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-25 19:54:12,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:12,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710613944] [2021-11-25 19:54:12,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710613944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:12,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934364540] [2021-11-25 19:54:12,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:12,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:12,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:12,207 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:12,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:54:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:12,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:54:12,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-25 19:54:12,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:54:12,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934364540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:54:12,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:54:12,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 19:54:12,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320217128] [2021-11-25 19:54:12,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:54:12,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:54:12,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:12,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:54:12,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:54:12,817 INFO L87 Difference]: Start difference. First operand 2104 states and 3384 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 19:54:13,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:13,208 INFO L93 Difference]: Finished difference Result 4352 states and 7104 transitions. [2021-11-25 19:54:13,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:54:13,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 134 [2021-11-25 19:54:13,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:13,233 INFO L225 Difference]: With dead ends: 4352 [2021-11-25 19:54:13,233 INFO L226 Difference]: Without dead ends: 2260 [2021-11-25 19:54:13,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:54:13,251 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 209 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:13,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1359 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:54:13,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2021-11-25 19:54:13,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2260. [2021-11-25 19:54:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 1641 states have (on average 1.6197440585009142) internal successors, (2658), 1713 states have internal predecessors, (2658), 479 states have call successors, (479), 133 states have call predecessors, (479), 139 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2021-11-25 19:54:13,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 3676 transitions. [2021-11-25 19:54:13,410 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 3676 transitions. Word has length 134 [2021-11-25 19:54:13,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:13,412 INFO L470 AbstractCegarLoop]: Abstraction has 2260 states and 3676 transitions. [2021-11-25 19:54:13,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 19:54:13,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 3676 transitions. [2021-11-25 19:54:13,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-25 19:54:13,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:13,421 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:13,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:13,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:13,635 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:13,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:13,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1749751387, now seen corresponding path program 1 times [2021-11-25 19:54:13,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:13,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592746247] [2021-11-25 19:54:13,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:13,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-25 19:54:13,795 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:13,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592746247] [2021-11-25 19:54:13,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592746247] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:13,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121969119] [2021-11-25 19:54:13,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:13,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:13,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:13,797 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:13,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:54:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:14,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:54:14,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 19:54:14,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:54:14,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121969119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:54:14,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:54:14,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 19:54:14,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545168889] [2021-11-25 19:54:14,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:54:14,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:54:14,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:14,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:54:14,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:54:14,435 INFO L87 Difference]: Start difference. First operand 2260 states and 3676 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 19:54:14,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:14,854 INFO L93 Difference]: Finished difference Result 4664 states and 7682 transitions. [2021-11-25 19:54:14,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:54:14,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 137 [2021-11-25 19:54:14,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:14,879 INFO L225 Difference]: With dead ends: 4664 [2021-11-25 19:54:14,879 INFO L226 Difference]: Without dead ends: 2416 [2021-11-25 19:54:14,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:54:14,897 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 207 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:14,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1359 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:54:14,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-11-25 19:54:15,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2416. [2021-11-25 19:54:15,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 1793 states have (on average 1.645287228109314) internal successors, (2950), 1865 states have internal predecessors, (2950), 479 states have call successors, (479), 137 states have call predecessors, (479), 143 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2021-11-25 19:54:15,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 3968 transitions. [2021-11-25 19:54:15,056 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 3968 transitions. Word has length 137 [2021-11-25 19:54:15,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:15,057 INFO L470 AbstractCegarLoop]: Abstraction has 2416 states and 3968 transitions. [2021-11-25 19:54:15,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 19:54:15,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 3968 transitions. [2021-11-25 19:54:15,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-25 19:54:15,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:15,065 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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] [2021-11-25 19:54:15,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:15,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 19:54:15,279 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:15,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:15,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2114211893, now seen corresponding path program 1 times [2021-11-25 19:54:15,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:15,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705988780] [2021-11-25 19:54:15,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:15,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-25 19:54:15,403 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:15,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705988780] [2021-11-25 19:54:15,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705988780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:54:15,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:54:15,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:54:15,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714667977] [2021-11-25 19:54:15,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:54:15,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:54:15,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:15,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:54:15,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:54:15,406 INFO L87 Difference]: Start difference. First operand 2416 states and 3968 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 19:54:15,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:15,847 INFO L93 Difference]: Finished difference Result 4988 states and 8266 transitions. [2021-11-25 19:54:15,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:54:15,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 139 [2021-11-25 19:54:15,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:15,872 INFO L225 Difference]: With dead ends: 4988 [2021-11-25 19:54:15,873 INFO L226 Difference]: Without dead ends: 2552 [2021-11-25 19:54:15,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:54:15,890 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 99 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:15,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1372 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:54:15,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-11-25 19:54:16,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2552. [2021-11-25 19:54:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 1925 states have (on average 1.5698701298701299) internal successors, (3022), 1997 states have internal predecessors, (3022), 479 states have call successors, (479), 141 states have call predecessors, (479), 147 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2021-11-25 19:54:16,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 4040 transitions. [2021-11-25 19:54:16,064 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 4040 transitions. Word has length 139 [2021-11-25 19:54:16,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:16,065 INFO L470 AbstractCegarLoop]: Abstraction has 2552 states and 4040 transitions. [2021-11-25 19:54:16,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 19:54:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 4040 transitions. [2021-11-25 19:54:16,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-25 19:54:16,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:16,075 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 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] [2021-11-25 19:54:16,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 19:54:16,076 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:16,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:16,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1152971740, now seen corresponding path program 1 times [2021-11-25 19:54:16,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:16,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765459438] [2021-11-25 19:54:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:16,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-25 19:54:16,252 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:16,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765459438] [2021-11-25 19:54:16,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765459438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:54:16,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:54:16,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 19:54:16,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367101497] [2021-11-25 19:54:16,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:54:16,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:54:16,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:16,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:54:16,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:54:16,258 INFO L87 Difference]: Start difference. First operand 2552 states and 4040 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-25 19:54:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:20,132 INFO L93 Difference]: Finished difference Result 6565 states and 10555 transitions. [2021-11-25 19:54:20,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 19:54:20,133 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 139 [2021-11-25 19:54:20,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:20,169 INFO L225 Difference]: With dead ends: 6565 [2021-11-25 19:54:20,170 INFO L226 Difference]: Without dead ends: 3660 [2021-11-25 19:54:20,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-11-25 19:54:20,185 INFO L933 BasicCegarLoop]: 766 mSDtfsCounter, 1576 mSDsluCounter, 1823 mSDsCounter, 0 mSdLazyCounter, 3739 mSolverCounterSat, 851 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1632 SdHoareTripleChecker+Valid, 2458 SdHoareTripleChecker+Invalid, 4590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 851 IncrementalHoareTripleChecker+Valid, 3739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:20,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1632 Valid, 2458 Invalid, 4590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [851 Valid, 3739 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-25 19:54:20,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2021-11-25 19:54:20,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 3482. [2021-11-25 19:54:20,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3482 states, 2496 states have (on average 1.4911858974358974) internal successors, (3722), 2626 states have internal predecessors, (3722), 745 states have call successors, (745), 215 states have call predecessors, (745), 240 states have return successors, (928), 697 states have call predecessors, (928), 739 states have call successors, (928) [2021-11-25 19:54:20,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3482 states to 3482 states and 5395 transitions. [2021-11-25 19:54:20,488 INFO L78 Accepts]: Start accepts. Automaton has 3482 states and 5395 transitions. Word has length 139 [2021-11-25 19:54:20,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:20,489 INFO L470 AbstractCegarLoop]: Abstraction has 3482 states and 5395 transitions. [2021-11-25 19:54:20,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-25 19:54:20,489 INFO L276 IsEmpty]: Start isEmpty. Operand 3482 states and 5395 transitions. [2021-11-25 19:54:20,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-25 19:54:20,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:20,497 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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] [2021-11-25 19:54:20,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 19:54:20,498 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:20,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:20,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1536148153, now seen corresponding path program 1 times [2021-11-25 19:54:20,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:20,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725009319] [2021-11-25 19:54:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:20,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-25 19:54:21,131 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:21,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725009319] [2021-11-25 19:54:21,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725009319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:21,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664983383] [2021-11-25 19:54:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:21,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:21,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:21,135 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:21,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:54:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:21,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 1533 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-25 19:54:21,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-25 19:54:23,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:55:07,619 WARN L227 SmtUtils]: Spent 41.14s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 234] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-25 19:55:49,906 WARN L227 SmtUtils]: Spent 40.75s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 234] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-25 19:55:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-25 19:55:51,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664983383] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:55:51,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1152399731] [2021-11-25 19:55:51,514 INFO L159 IcfgInterpreter]: Started Sifa with 96 locations of interest [2021-11-25 19:55:51,514 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:55:51,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:55:51,524 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:55:51,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:55:54,633 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2021-11-25 19:56:01,041 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 577 for LOIs [2021-11-25 19:56:20,099 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 115 for LOIs [2021-11-25 19:56:20,999 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 506 for LOIs [2021-11-25 19:56:21,149 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 503 for LOIs [2021-11-25 19:56:22,127 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 446 for LOIs [2021-11-25 19:56:22,871 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 47 for LOIs [2021-11-25 19:56:22,883 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 116 for LOIs [2021-11-25 19:56:22,906 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 47 for LOIs [2021-11-25 19:56:22,912 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2021-11-25 19:56:26,119 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2021-11-25 19:56:26,637 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2021-11-25 19:56:26,776 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:56:44,569 WARN L227 SmtUtils]: Spent 5.45s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:56:50,442 WARN L227 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:58:28,238 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '88931#(and (= |old(~floorButtons_2~0)| 0) (= ~executiveFloor~0 4) (= |old(~persons_1~0)| 0) (= |old(~persons_5~0)| 0) (= |old(~doorState~0)| 1) (= |old(~persons_2~0)| 0) (= ~persons_5~0 0) (= |old(~persons_4~0)| 0) (<= |timeShift_isExecutiveFloor_#res#1| 0) (= |old(~floorButtons_0~0)| 0) (<= ~floorButtons_0~0 0) (= |old(~blocked~0)| 0) (<= 1 |timeShift_~tmp~26#1|) (<= ~calls_0~0 0) (= ~head~0.offset 0) (= |old(~weight~0)| 0) (<= |timeShift_isExecutiveFloor_~floorID#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~5#1| 0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (= ~persons_4~0 0) (<= 0 |timeShift_isExecutiveFloor_~retValue_acc~26#1|) (<= 0 |timeShift_isExecutiveFloor_#in~floorID#1|) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (<= |timeShift_isExecutiveFloor_#in~floorID#1| 0) (= ~persons_3~0 0) (= |old(~floorButtons_4~0)| 0) (= |old(~persons_0~0)| 0) (<= 0 |timeShift___utac_acc__Specification14_spec__1_~tmp~5#1|) (<= 0 ~floorButtons_0~0) (<= 0 |timeShift_isExecutiveFloor_#res#1|) (= ~doorState~0 1) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~5#1|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (<= 0 ~calls_0~0) (= |old(~persons_3~0)| 0) (= ~persons_1~0 0) (= ~persons_0~0 0) (= |old(~floorButtons_3~0)| 0) (<= 0 |timeShift_isExecutiveFloor_~floorID#1|) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~blocked~0 0) (= |old(~currentHeading~0)| 1) (= |old(~personOnFloor_5_1~0)| 1) (= 1 |old(~calls_1~0)|) (<= |timeShift_~tmp~26#1| 1) (= |old(~floorButtons_1~0)| 0) (= |old(~currentFloorID~0)| 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (<= |timeShift_isExecutiveFloor_~retValue_acc~26#1| 0) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0) (= ~persons_2~0 0))' at error location [2021-11-25 19:58:28,239 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:58:28,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:58:28,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 16] total 50 [2021-11-25 19:58:28,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491422656] [2021-11-25 19:58:28,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:58:28,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-25 19:58:28,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:28,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-25 19:58:28,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1165, Invalid=11945, Unknown=0, NotChecked=0, Total=13110 [2021-11-25 19:58:28,250 INFO L87 Difference]: Start difference. First operand 3482 states and 5395 transitions. Second operand has 50 states, 38 states have (on average 4.947368421052632) internal successors, (188), 40 states have internal predecessors, (188), 13 states have call successors, (55), 10 states have call predecessors, (55), 21 states have return successors, (54), 21 states have call predecessors, (54), 13 states have call successors, (54) [2021-11-25 19:58:48,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:48,304 INFO L93 Difference]: Finished difference Result 11573 states and 18641 transitions. [2021-11-25 19:58:48,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-25 19:58:48,304 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 38 states have (on average 4.947368421052632) internal successors, (188), 40 states have internal predecessors, (188), 13 states have call successors, (55), 10 states have call predecessors, (55), 21 states have return successors, (54), 21 states have call predecessors, (54), 13 states have call successors, (54) Word has length 140 [2021-11-25 19:58:48,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:48,343 INFO L225 Difference]: With dead ends: 11573 [2021-11-25 19:58:48,344 INFO L226 Difference]: Without dead ends: 6460 [2021-11-25 19:58:48,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 325 SyntacticMatches, 28 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17939 ImplicationChecksByTransitivity, 127.6s TimeCoverageRelationStatistics Valid=3791, Invalid=38029, Unknown=0, NotChecked=0, Total=41820 [2021-11-25 19:58:48,385 INFO L933 BasicCegarLoop]: 731 mSDtfsCounter, 9431 mSDsluCounter, 7361 mSDsCounter, 0 mSdLazyCounter, 23079 mSolverCounterSat, 7422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9476 SdHoareTripleChecker+Valid, 7517 SdHoareTripleChecker+Invalid, 30501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7422 IncrementalHoareTripleChecker+Valid, 23079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:48,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9476 Valid, 7517 Invalid, 30501 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7422 Valid, 23079 Invalid, 0 Unknown, 0 Unchecked, 14.4s Time] [2021-11-25 19:58:48,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6460 states. [2021-11-25 19:58:48,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6460 to 5809. [2021-11-25 19:58:48,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5809 states, 4032 states have (on average 1.3948412698412698) internal successors, (5624), 4297 states have internal predecessors, (5624), 1317 states have call successors, (1317), 399 states have call predecessors, (1317), 459 states have return successors, (1698), 1216 states have call predecessors, (1698), 1311 states have call successors, (1698) [2021-11-25 19:58:48,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5809 states to 5809 states and 8639 transitions. [2021-11-25 19:58:48,821 INFO L78 Accepts]: Start accepts. Automaton has 5809 states and 8639 transitions. Word has length 140 [2021-11-25 19:58:48,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:48,823 INFO L470 AbstractCegarLoop]: Abstraction has 5809 states and 8639 transitions. [2021-11-25 19:58:48,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 38 states have (on average 4.947368421052632) internal successors, (188), 40 states have internal predecessors, (188), 13 states have call successors, (55), 10 states have call predecessors, (55), 21 states have return successors, (54), 21 states have call predecessors, (54), 13 states have call successors, (54) [2021-11-25 19:58:48,824 INFO L276 IsEmpty]: Start isEmpty. Operand 5809 states and 8639 transitions. [2021-11-25 19:58:48,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-25 19:58:48,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:48,836 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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] [2021-11-25 19:58:48,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:58:49,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 19:58:49,063 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:49,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:49,063 INFO L85 PathProgramCache]: Analyzing trace with hash 39205283, now seen corresponding path program 1 times [2021-11-25 19:58:49,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:49,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834207179] [2021-11-25 19:58:49,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:49,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-25 19:58:49,197 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:49,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834207179] [2021-11-25 19:58:49,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834207179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:58:49,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794553845] [2021-11-25 19:58:49,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:49,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:58:49,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:58:49,199 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:58:49,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:58:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:49,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1547 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:58:49,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:58:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-25 19:58:50,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:58:50,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794553845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:50,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:58:50,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 16 [2021-11-25 19:58:50,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845492351] [2021-11-25 19:58:50,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:50,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:58:50,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:50,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:58:50,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-25 19:58:50,159 INFO L87 Difference]: Start difference. First operand 5809 states and 8639 transitions. Second operand has 10 states, 9 states have (on average 8.555555555555555) internal successors, (77), 8 states have internal predecessors, (77), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-11-25 19:58:53,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:53,884 INFO L93 Difference]: Finished difference Result 13543 states and 20322 transitions. [2021-11-25 19:58:53,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 19:58:53,885 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.555555555555555) internal successors, (77), 8 states have internal predecessors, (77), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 145 [2021-11-25 19:58:53,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:53,933 INFO L225 Difference]: With dead ends: 13543 [2021-11-25 19:58:53,933 INFO L226 Difference]: Without dead ends: 7748 [2021-11-25 19:58:53,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-11-25 19:58:53,961 INFO L933 BasicCegarLoop]: 652 mSDtfsCounter, 2458 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 1545 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2633 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 6017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1545 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:53,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2633 Valid, 1751 Invalid, 6017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1545 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-25 19:58:53,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7748 states. [2021-11-25 19:58:54,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7748 to 7428. [2021-11-25 19:58:54,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7428 states, 5262 states have (on average 1.3759026985936906) internal successors, (7240), 5556 states have internal predecessors, (7240), 1557 states have call successors, (1557), 539 states have call predecessors, (1557), 608 states have return successors, (1999), 1443 states have call predecessors, (1999), 1549 states have call successors, (1999) [2021-11-25 19:58:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7428 states to 7428 states and 10796 transitions. [2021-11-25 19:58:54,591 INFO L78 Accepts]: Start accepts. Automaton has 7428 states and 10796 transitions. Word has length 145 [2021-11-25 19:58:54,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:54,592 INFO L470 AbstractCegarLoop]: Abstraction has 7428 states and 10796 transitions. [2021-11-25 19:58:54,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.555555555555555) internal successors, (77), 8 states have internal predecessors, (77), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-11-25 19:58:54,592 INFO L276 IsEmpty]: Start isEmpty. Operand 7428 states and 10796 transitions. [2021-11-25 19:58:54,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-11-25 19:58:54,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:54,618 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:54,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:58:54,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:58:54,834 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:54,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:54,834 INFO L85 PathProgramCache]: Analyzing trace with hash -640234745, now seen corresponding path program 1 times [2021-11-25 19:58:54,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:54,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309515238] [2021-11-25 19:58:54,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:54,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 21 proven. 38 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2021-11-25 19:58:55,015 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:55,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309515238] [2021-11-25 19:58:55,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309515238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:58:55,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202191589] [2021-11-25 19:58:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:55,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:58:55,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:58:55,019 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:58:55,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:58:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:55,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 2750 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:58:55,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:58:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-25 19:58:55,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:58:55,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202191589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:55,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:58:55,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2021-11-25 19:58:55,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945493335] [2021-11-25 19:58:55,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:55,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:58:55,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:55,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:58:55,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-11-25 19:58:55,958 INFO L87 Difference]: Start difference. First operand 7428 states and 10796 transitions. Second operand has 10 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-25 19:58:58,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:58,483 INFO L93 Difference]: Finished difference Result 12638 states and 18311 transitions. [2021-11-25 19:58:58,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 19:58:58,484 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) Word has length 276 [2021-11-25 19:58:58,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:58,522 INFO L225 Difference]: With dead ends: 12638 [2021-11-25 19:58:58,522 INFO L226 Difference]: Without dead ends: 6554 [2021-11-25 19:58:58,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-11-25 19:58:58,543 INFO L933 BasicCegarLoop]: 737 mSDtfsCounter, 1261 mSDsluCounter, 2903 mSDsCounter, 0 mSdLazyCounter, 3687 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1281 SdHoareTripleChecker+Valid, 3306 SdHoareTripleChecker+Invalid, 3901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 3687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:58,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1281 Valid, 3306 Invalid, 3901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 3687 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 19:58:58,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6554 states. [2021-11-25 19:58:59,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6554 to 6416. [2021-11-25 19:58:59,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6416 states, 4491 states have (on average 1.3691828100645735) internal successors, (6149), 4726 states have internal predecessors, (6149), 1384 states have call successors, (1384), 505 states have call predecessors, (1384), 540 states have return successors, (1744), 1277 states have call predecessors, (1744), 1376 states have call successors, (1744) [2021-11-25 19:58:59,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6416 states to 6416 states and 9277 transitions. [2021-11-25 19:58:59,066 INFO L78 Accepts]: Start accepts. Automaton has 6416 states and 9277 transitions. Word has length 276 [2021-11-25 19:58:59,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:59,067 INFO L470 AbstractCegarLoop]: Abstraction has 6416 states and 9277 transitions. [2021-11-25 19:58:59,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-25 19:58:59,067 INFO L276 IsEmpty]: Start isEmpty. Operand 6416 states and 9277 transitions. [2021-11-25 19:58:59,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-25 19:58:59,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:59,089 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:59,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:58:59,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 19:58:59,303 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:59,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:59,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1189618851, now seen corresponding path program 1 times [2021-11-25 19:58:59,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:59,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89747540] [2021-11-25 19:58:59,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:59,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-25 19:58:59,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:59,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89747540] [2021-11-25 19:58:59,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89747540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:58:59,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793612454] [2021-11-25 19:58:59,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:59,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:58:59,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:58:59,444 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:58:59,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:58:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:59,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:58:59,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-11-25 19:59:00,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:59:00,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793612454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:00,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:59:00,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-11-25 19:59:00,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104971004] [2021-11-25 19:59:00,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:00,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:59:00,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:00,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:59:00,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:59:00,414 INFO L87 Difference]: Start difference. First operand 6416 states and 9277 transitions. Second operand has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-25 19:59:04,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:04,421 INFO L93 Difference]: Finished difference Result 15560 states and 23019 transitions. [2021-11-25 19:59:04,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 19:59:04,421 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) Word has length 226 [2021-11-25 19:59:04,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:04,478 INFO L225 Difference]: With dead ends: 15560 [2021-11-25 19:59:04,478 INFO L226 Difference]: Without dead ends: 9526 [2021-11-25 19:59:04,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-11-25 19:59:04,508 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 1608 mSDsluCounter, 1666 mSDsCounter, 0 mSdLazyCounter, 4868 mSolverCounterSat, 1150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1792 SdHoareTripleChecker+Valid, 2401 SdHoareTripleChecker+Invalid, 6018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1150 IncrementalHoareTripleChecker+Valid, 4868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:04,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1792 Valid, 2401 Invalid, 6018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1150 Valid, 4868 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-25 19:59:04,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9526 states. [2021-11-25 19:59:05,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9526 to 8350. [2021-11-25 19:59:05,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8350 states, 5749 states have (on average 1.3609323360584449) internal successors, (7824), 6101 states have internal predecessors, (7824), 1928 states have call successors, (1928), 622 states have call predecessors, (1928), 672 states have return successors, (2410), 1821 states have call predecessors, (2410), 1918 states have call successors, (2410) [2021-11-25 19:59:05,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8350 states to 8350 states and 12162 transitions. [2021-11-25 19:59:05,217 INFO L78 Accepts]: Start accepts. Automaton has 8350 states and 12162 transitions. Word has length 226 [2021-11-25 19:59:05,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:05,218 INFO L470 AbstractCegarLoop]: Abstraction has 8350 states and 12162 transitions. [2021-11-25 19:59:05,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-25 19:59:05,218 INFO L276 IsEmpty]: Start isEmpty. Operand 8350 states and 12162 transitions. [2021-11-25 19:59:05,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-25 19:59:05,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:05,241 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:05,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:05,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 19:59:05,455 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:59:05,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:05,455 INFO L85 PathProgramCache]: Analyzing trace with hash 867749839, now seen corresponding path program 1 times [2021-11-25 19:59:05,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:05,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44449496] [2021-11-25 19:59:05,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:05,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:05,624 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-25 19:59:05,625 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:05,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44449496] [2021-11-25 19:59:05,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44449496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:05,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536595160] [2021-11-25 19:59:05,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:05,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:05,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:05,627 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:05,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 19:59:06,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:06,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:59:06,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-11-25 19:59:06,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:59:06,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536595160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:06,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:59:06,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-11-25 19:59:06,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802510065] [2021-11-25 19:59:06,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:06,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:59:06,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:06,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:59:06,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:59:06,669 INFO L87 Difference]: Start difference. First operand 8350 states and 12162 transitions. Second operand has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-25 19:59:10,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:10,897 INFO L93 Difference]: Finished difference Result 22639 states and 33868 transitions. [2021-11-25 19:59:10,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 19:59:10,898 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) Word has length 226 [2021-11-25 19:59:10,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:10,994 INFO L225 Difference]: With dead ends: 22639 [2021-11-25 19:59:10,994 INFO L226 Difference]: Without dead ends: 14693 [2021-11-25 19:59:11,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-11-25 19:59:11,038 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 1203 mSDsluCounter, 1835 mSDsCounter, 0 mSdLazyCounter, 5485 mSolverCounterSat, 888 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1384 SdHoareTripleChecker+Valid, 2541 SdHoareTripleChecker+Invalid, 6373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 888 IncrementalHoareTripleChecker+Valid, 5485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:11,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1384 Valid, 2541 Invalid, 6373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [888 Valid, 5485 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-25 19:59:11,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14693 states. [2021-11-25 19:59:12,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14693 to 12999. [2021-11-25 19:59:12,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12999 states, 8717 states have (on average 1.3540208787426866) internal successors, (11803), 9327 states have internal predecessors, (11803), 3295 states have call successors, (3295), 898 states have call predecessors, (3295), 986 states have return successors, (4153), 3189 states have call predecessors, (4153), 3281 states have call successors, (4153) [2021-11-25 19:59:12,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12999 states to 12999 states and 19251 transitions. [2021-11-25 19:59:12,097 INFO L78 Accepts]: Start accepts. Automaton has 12999 states and 19251 transitions. Word has length 226 [2021-11-25 19:59:12,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:12,098 INFO L470 AbstractCegarLoop]: Abstraction has 12999 states and 19251 transitions. [2021-11-25 19:59:12,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-25 19:59:12,098 INFO L276 IsEmpty]: Start isEmpty. Operand 12999 states and 19251 transitions. [2021-11-25 19:59:12,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-25 19:59:12,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:12,130 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:12,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:12,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 19:59:12,343 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:59:12,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:12,343 INFO L85 PathProgramCache]: Analyzing trace with hash 349177571, now seen corresponding path program 1 times [2021-11-25 19:59:12,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:12,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666122454] [2021-11-25 19:59:12,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:12,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-25 19:59:12,474 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:12,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666122454] [2021-11-25 19:59:12,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666122454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:12,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939559842] [2021-11-25 19:59:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:12,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:12,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:12,476 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:12,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:59:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:13,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:59:13,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-11-25 19:59:13,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:59:13,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939559842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:13,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:59:13,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-11-25 19:59:13,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593362559] [2021-11-25 19:59:13,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:13,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:59:13,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:13,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:59:13,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:59:13,725 INFO L87 Difference]: Start difference. First operand 12999 states and 19251 transitions. Second operand has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-25 19:59:18,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:18,658 INFO L93 Difference]: Finished difference Result 35489 states and 54414 transitions. [2021-11-25 19:59:18,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 19:59:18,659 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) Word has length 226 [2021-11-25 19:59:18,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:19,005 INFO L225 Difference]: With dead ends: 35489 [2021-11-25 19:59:19,006 INFO L226 Difference]: Without dead ends: 26006 [2021-11-25 19:59:19,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-11-25 19:59:19,058 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 1534 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 4789 mSolverCounterSat, 1096 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1714 SdHoareTripleChecker+Valid, 2385 SdHoareTripleChecker+Invalid, 5885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1096 IncrementalHoareTripleChecker+Valid, 4789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:19,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1714 Valid, 2385 Invalid, 5885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1096 Valid, 4789 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-25 19:59:19,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26006 states. [2021-11-25 19:59:20,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26006 to 22278. [2021-11-25 19:59:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22278 states, 14257 states have (on average 1.349302097215403) internal successors, (19237), 15546 states have internal predecessors, (19237), 6538 states have call successors, (6538), 1294 states have call predecessors, (6538), 1482 states have return successors, (8258), 6444 states have call predecessors, (8258), 6516 states have call successors, (8258) [2021-11-25 19:59:20,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22278 states to 22278 states and 34033 transitions. [2021-11-25 19:59:20,910 INFO L78 Accepts]: Start accepts. Automaton has 22278 states and 34033 transitions. Word has length 226 [2021-11-25 19:59:20,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:20,910 INFO L470 AbstractCegarLoop]: Abstraction has 22278 states and 34033 transitions. [2021-11-25 19:59:20,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-25 19:59:20,911 INFO L276 IsEmpty]: Start isEmpty. Operand 22278 states and 34033 transitions. [2021-11-25 19:59:20,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-25 19:59:20,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:20,958 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:21,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:21,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:21,171 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:59:21,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:21,171 INFO L85 PathProgramCache]: Analyzing trace with hash 701297167, now seen corresponding path program 1 times [2021-11-25 19:59:21,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:21,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240885061] [2021-11-25 19:59:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:21,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-25 19:59:21,315 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:21,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240885061] [2021-11-25 19:59:21,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240885061] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:21,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234441684] [2021-11-25 19:59:21,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:21,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:21,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:21,317 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:21,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:59:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:21,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:59:21,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-11-25 19:59:22,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:59:22,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234441684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:22,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:59:22,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-11-25 19:59:22,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039964619] [2021-11-25 19:59:22,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:22,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:59:22,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:22,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:59:22,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:59:22,567 INFO L87 Difference]: Start difference. First operand 22278 states and 34033 transitions. Second operand has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-25 19:59:29,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:29,741 INFO L93 Difference]: Finished difference Result 72755 states and 115676 transitions. [2021-11-25 19:59:29,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 19:59:29,741 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) Word has length 226 [2021-11-25 19:59:29,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:30,108 INFO L225 Difference]: With dead ends: 72755 [2021-11-25 19:59:30,108 INFO L226 Difference]: Without dead ends: 54253 [2021-11-25 19:59:30,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-11-25 19:59:30,198 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 1217 mSDsluCounter, 1898 mSDsCounter, 0 mSdLazyCounter, 5602 mSolverCounterSat, 905 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1402 SdHoareTripleChecker+Valid, 2609 SdHoareTripleChecker+Invalid, 6507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 905 IncrementalHoareTripleChecker+Valid, 5602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:30,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1402 Valid, 2609 Invalid, 6507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [905 Valid, 5602 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-25 19:59:30,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54253 states. [2021-11-25 19:59:33,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54253 to 45373. [2021-11-25 19:59:34,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45373 states, 27340 states have (on average 1.3460497439648866) internal successors, (36801), 30524 states have internal predecessors, (36801), 15444 states have call successors, (15444), 2128 states have call predecessors, (15444), 2588 states have return successors, (19753), 15370 states have call predecessors, (19753), 15406 states have call successors, (19753) [2021-11-25 19:59:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45373 states to 45373 states and 71998 transitions. [2021-11-25 19:59:34,343 INFO L78 Accepts]: Start accepts. Automaton has 45373 states and 71998 transitions. Word has length 226 [2021-11-25 19:59:34,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:34,344 INFO L470 AbstractCegarLoop]: Abstraction has 45373 states and 71998 transitions. [2021-11-25 19:59:34,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-25 19:59:34,344 INFO L276 IsEmpty]: Start isEmpty. Operand 45373 states and 71998 transitions. [2021-11-25 19:59:34,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-25 19:59:34,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:34,384 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:34,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:34,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 19:59:34,599 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:59:34,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:34,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1978690481, now seen corresponding path program 1 times [2021-11-25 19:59:34,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:34,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525596004] [2021-11-25 19:59:34,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:34,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-25 19:59:34,726 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:34,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525596004] [2021-11-25 19:59:34,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525596004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:34,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562319309] [2021-11-25 19:59:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:34,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:34,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:34,728 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:34,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5f309f9-9cf9-4dd8-aaf3-d0435a6657ee/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 19:59:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:35,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-25 19:59:35,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-25 19:59:36,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:59:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-11-25 19:59:41,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562319309] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:59:41,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [268109118] [2021-11-25 19:59:41,436 INFO L159 IcfgInterpreter]: Started Sifa with 123 locations of interest [2021-11-25 19:59:41,437 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:59:41,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:59:41,438 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:59:41,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:00:06,470 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 600 for LOIs [2021-11-25 20:00:07,279 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 69 for LOIs [2021-11-25 20:00:09,050 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 195 for LOIs [2021-11-25 20:00:13,647 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 81 for LOIs [2021-11-25 20:00:14,061 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 31 for LOIs [2021-11-25 20:00:14,064 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 49 for LOIs [2021-11-25 20:00:14,127 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 34 for LOIs [2021-11-25 20:00:14,191 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 49 for LOIs [2021-11-25 20:00:14,206 INFO L197 IcfgInterpreter]: Interpreting procedure leaveElevator with input of size 77 for LOIs [2021-11-25 20:00:14,393 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 83 for LOIs [2021-11-25 20:00:14,414 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 65 for LOIs [2021-11-25 20:00:14,426 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2021-11-25 20:00:17,561 INFO L197 IcfgInterpreter]: Interpreting procedure getWeight with input of size 36 for LOIs [2021-11-25 20:00:17,572 INFO L197 IcfgInterpreter]: Interpreting procedure getDestination with input of size 51 for LOIs [2021-11-25 20:00:17,584 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 555 for LOIs [2021-11-25 20:00:22,607 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 74 for LOIs [2021-11-25 20:00:22,784 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 69 for LOIs [2021-11-25 20:00:22,804 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:00:34,921 WARN L227 SmtUtils]: Spent 5.45s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:00:40,580 WARN L227 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:01:16,891 WARN L227 SmtUtils]: Spent 6.98s on a formula simplification. DAG size of input: 463 DAG size of output: 444 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:01:27,523 WARN L227 SmtUtils]: Spent 7.97s on a formula simplification. DAG size of input: 555 DAG size of output: 542 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:01:37,843 WARN L227 SmtUtils]: Spent 8.80s on a formula simplification. DAG size of input: 559 DAG size of output: 539 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:01:48,231 WARN L227 SmtUtils]: Spent 8.80s on a formula simplification. DAG size of input: 559 DAG size of output: 540 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:01:56,447 WARN L227 SmtUtils]: Spent 6.84s on a formula simplification. DAG size of input: 463 DAG size of output: 441 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:02:06,743 WARN L227 SmtUtils]: Spent 7.48s on a formula simplification. DAG size of input: 469 DAG size of output: 446 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:02:14,929 WARN L227 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 600 DAG size of output: 579 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:02:19,861 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '504228#(and (<= 0 (+ 2147483648 |timeShift_~tmp~26#1|)) (<= |old(~doorState~0)| 2147483647) (or (and (= ~executiveFloor~0 4) (= |timeShift_isExecutiveFloor_~retValue_acc~26#1| |timeShift_isExecutiveFloor_#res#1|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~5#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= ~head~0.offset 0) (= |timeShift_isExecutiveFloor_~retValue_acc~26#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (= ~blocked~0 1) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~5#1|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0)) (and (= ~executiveFloor~0 4) (= |timeShift_isExecutiveFloor_~retValue_acc~26#1| |timeShift_isExecutiveFloor_#res#1|) (= ~persons_5~0 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~5#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= ~calls_0~0 0) (= ~head~0.offset 0) (= ~persons_4~0 0) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~persons_3~0 0) (= ~doorState~0 1) (= ~floorButtons_0~0 0) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~5#1|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (= ~currentFloorID~0 0) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0) (= ~persons_2~0 0))) (<= |timeShift_~tmp~26#1| 2147483647) (<= 0 (+ |old(~doorState~0)| 2147483648)) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 0)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (<= |#NULL.offset| 0) (<= 0 |old(~blocked~0)|) (<= 0 ~head~0.base) (<= 0 |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|)) (<= |old(~blocked~0)| 1) (<= ~maximumWeight~0 100) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (<= ~head~0.base 0) (<= 0 (+ |timeShift___utac_acc__Specification14_spec__1_~tmp~5#1| 2147483648)) (<= ~doorState~0 2147483647) (<= ~blocked~0 1) (<= |timeShift_isExecutiveFloor_#in~floorID#1| 2147483647) (<= 0 |#NULL.offset|) (<= 0 ~blocked~0) (<= 0 |#StackHeapBarrier|) (<= |timeShift_isExecutiveFloor_~retValue_acc~26#1| 0) (<= 100 ~maximumWeight~0))' at error location [2021-11-25 20:02:19,862 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:02:19,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:02:19,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 13] total 27 [2021-11-25 20:02:19,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814729403] [2021-11-25 20:02:19,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:02:19,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 20:02:19,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:02:19,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 20:02:19,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1143, Invalid=13377, Unknown=0, NotChecked=0, Total=14520 [2021-11-25 20:02:19,867 INFO L87 Difference]: Start difference. First operand 45373 states and 71998 transitions. Second operand has 27 states, 19 states have (on average 12.473684210526315) internal successors, (237), 22 states have internal predecessors, (237), 20 states have call successors, (87), 10 states have call predecessors, (87), 14 states have return successors, (85), 20 states have call predecessors, (85), 20 states have call successors, (85)