./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5643166a994eeb2bd259cf18f0a4b43a93b8e6b433c116ad537f0a1a02a75ec3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 01:10:28,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:10:28,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:10:28,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:10:28,161 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:10:28,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:10:28,169 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:10:28,173 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:10:28,175 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:10:28,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:10:28,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:10:28,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:10:28,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:10:28,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:10:28,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:10:28,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:10:28,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:10:28,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:10:28,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:10:28,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:10:28,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:10:28,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:10:28,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:10:28,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:10:28,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:10:28,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:10:28,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:10:28,228 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:10:28,228 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:10:28,229 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:10:28,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:10:28,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:10:28,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:10:28,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:10:28,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:10:28,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:10:28,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:10:28,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:10:28,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:10:28,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:10:28,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:10:28,247 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 01:10:28,294 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:10:28,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:10:28,296 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:10:28,296 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:10:28,297 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:10:28,298 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:10:28,298 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:10:28,298 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:10:28,298 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:10:28,299 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:10:28,300 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:10:28,300 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:10:28,300 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:10:28,301 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:10:28,301 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:10:28,301 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:10:28,302 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:10:28,302 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:10:28,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:10:28,303 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:10:28,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:10:28,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:10:28,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:10:28,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:10:28,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:10:28,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:10:28,305 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:10:28,305 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:10:28,306 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:10:28,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:10:28,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:10:28,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:10:28,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:10:28,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:10:28,308 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:10:28,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:10:28,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:10:28,309 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:10:28,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:10:28,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:10:28,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:10:28,310 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5643166a994eeb2bd259cf18f0a4b43a93b8e6b433c116ad537f0a1a02a75ec3 [2022-11-26 01:10:28,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:10:28,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:10:28,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:10:28,734 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:10:28,735 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:10:28,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c [2022-11-26 01:10:31,938 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:10:32,361 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:10:32,363 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c [2022-11-26 01:10:32,395 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/data/431fbd86e/64117fe88a0d4338a051512a9124d3aa/FLAGbbe939161 [2022-11-26 01:10:32,416 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/data/431fbd86e/64117fe88a0d4338a051512a9124d3aa [2022-11-26 01:10:32,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:10:32,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:10:32,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:10:32,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:10:32,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:10:32,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:10:32" (1/1) ... [2022-11-26 01:10:32,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@650c63a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:10:32, skipping insertion in model container [2022-11-26 01:10:32,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:10:32" (1/1) ... [2022-11-26 01:10:32,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:10:32,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:10:33,085 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c[49225,49238] [2022-11-26 01:10:33,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:10:33,196 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:10:33,298 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c[49225,49238] [2022-11-26 01:10:33,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:10:33,349 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:10:33,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:10:33 WrapperNode [2022-11-26 01:10:33,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:10:33,351 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:10:33,352 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:10:33,352 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:10:33,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:10:33" (1/1) ... [2022-11-26 01:10:33,387 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:10:33" (1/1) ... [2022-11-26 01:10:33,442 INFO L138 Inliner]: procedures = 91, calls = 333, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 1051 [2022-11-26 01:10:33,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:10:33,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:10:33,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:10:33,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:10:33,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:10:33" (1/1) ... [2022-11-26 01:10:33,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:10:33" (1/1) ... [2022-11-26 01:10:33,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:10:33" (1/1) ... [2022-11-26 01:10:33,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:10:33" (1/1) ... [2022-11-26 01:10:33,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:10:33" (1/1) ... [2022-11-26 01:10:33,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:10:33" (1/1) ... [2022-11-26 01:10:33,500 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:10:33" (1/1) ... [2022-11-26 01:10:33,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:10:33" (1/1) ... [2022-11-26 01:10:33,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:10:33,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:10:33,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:10:33,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:10:33,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:10:33" (1/1) ... [2022-11-26 01:10:33,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:10:33,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:33,567 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:10:33,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:10:33,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:10:33,666 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-26 01:10:33,666 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-26 01:10:33,666 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-26 01:10:33,667 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-26 01:10:33,667 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-26 01:10:33,667 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-26 01:10:33,667 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-26 01:10:33,667 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-26 01:10:33,667 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-26 01:10:33,668 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-26 01:10:33,668 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-26 01:10:33,668 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-26 01:10:33,668 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-26 01:10:33,668 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-26 01:10:33,668 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-26 01:10:33,669 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-26 01:10:33,669 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-26 01:10:33,669 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-26 01:10:33,669 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-26 01:10:33,669 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-26 01:10:33,669 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-26 01:10:33,670 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-26 01:10:33,670 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-26 01:10:33,686 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-26 01:10:33,687 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-26 01:10:33,687 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-26 01:10:33,687 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-26 01:10:33,687 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-26 01:10:33,687 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-26 01:10:33,687 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-26 01:10:33,687 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-26 01:10:33,688 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-26 01:10:33,688 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-26 01:10:33,688 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-26 01:10:33,688 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-26 01:10:33,688 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-26 01:10:33,688 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-26 01:10:33,688 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-26 01:10:33,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:10:33,689 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-26 01:10:33,689 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-26 01:10:33,689 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-26 01:10:33,693 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-26 01:10:33,694 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-26 01:10:33,694 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-26 01:10:33,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:10:33,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:10:33,695 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-26 01:10:33,697 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-26 01:10:33,938 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:10:33,945 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:10:35,180 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:10:35,978 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:10:35,978 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 01:10:35,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:10:35 BoogieIcfgContainer [2022-11-26 01:10:35,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:10:35,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:10:35,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:10:35,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:10:35,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:10:32" (1/3) ... [2022-11-26 01:10:35,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16a4e9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:10:35, skipping insertion in model container [2022-11-26 01:10:35,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:10:33" (2/3) ... [2022-11-26 01:10:35,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16a4e9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:10:35, skipping insertion in model container [2022-11-26 01:10:35,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:10:35" (3/3) ... [2022-11-26 01:10:36,004 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product19.cil.c [2022-11-26 01:10:36,030 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:10:36,030 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:10:36,112 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:10:36,120 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4fe31bbc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:10:36,121 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:10:36,129 INFO L276 IsEmpty]: Start isEmpty. Operand has 353 states, 235 states have (on average 1.5702127659574467) internal successors, (369), 251 states have internal predecessors, (369), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2022-11-26 01:10:36,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 01:10:36,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:36,167 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:10:36,168 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:36,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:36,173 INFO L85 PathProgramCache]: Analyzing trace with hash 724049478, now seen corresponding path program 1 times [2022-11-26 01:10:36,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:36,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968254107] [2022-11-26 01:10:36,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:36,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 01:10:37,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:37,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968254107] [2022-11-26 01:10:37,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968254107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:37,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:10:37,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 01:10:37,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111336597] [2022-11-26 01:10:37,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:37,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:10:37,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:37,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:10:37,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:10:37,179 INFO L87 Difference]: Start difference. First operand has 353 states, 235 states have (on average 1.5702127659574467) internal successors, (369), 251 states have internal predecessors, (369), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-26 01:10:38,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:38,315 INFO L93 Difference]: Finished difference Result 1037 states and 1657 transitions. [2022-11-26 01:10:38,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:10:38,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 73 [2022-11-26 01:10:38,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:38,345 INFO L225 Difference]: With dead ends: 1037 [2022-11-26 01:10:38,349 INFO L226 Difference]: Without dead ends: 685 [2022-11-26 01:10:38,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:10:38,367 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 530 mSDsluCounter, 1644 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 2306 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:38,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 2306 Invalid, 388 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 01:10:38,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-11-26 01:10:38,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 679. [2022-11-26 01:10:38,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 455 states have (on average 1.5604395604395604) internal successors, (710), 484 states have internal predecessors, (710), 180 states have call successors, (180), 45 states have call predecessors, (180), 43 states have return successors, (186), 174 states have call predecessors, (186), 178 states have call successors, (186) [2022-11-26 01:10:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1076 transitions. [2022-11-26 01:10:38,552 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1076 transitions. Word has length 73 [2022-11-26 01:10:38,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:38,554 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 1076 transitions. [2022-11-26 01:10:38,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-26 01:10:38,556 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1076 transitions. [2022-11-26 01:10:38,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-26 01:10:38,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:38,628 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:10:38,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 01:10:38,628 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:38,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:38,629 INFO L85 PathProgramCache]: Analyzing trace with hash 2105617581, now seen corresponding path program 1 times [2022-11-26 01:10:38,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:38,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103106411] [2022-11-26 01:10:38,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:38,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 01:10:42,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:42,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103106411] [2022-11-26 01:10:42,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103106411] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:42,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225930105] [2022-11-26 01:10:42,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:42,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:42,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:42,534 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:42,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:10:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:42,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 01:10:42,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 01:10:43,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:10:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 01:10:43,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225930105] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:43,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:10:43,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [19, 4] total 23 [2022-11-26 01:10:43,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395864028] [2022-11-26 01:10:43,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:43,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:10:43,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:43,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:10:43,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-11-26 01:10:43,394 INFO L87 Difference]: Start difference. First operand 679 states and 1076 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-26 01:10:44,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:44,199 INFO L93 Difference]: Finished difference Result 776 states and 1223 transitions. [2022-11-26 01:10:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:10:44,200 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 77 [2022-11-26 01:10:44,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:44,210 INFO L225 Difference]: With dead ends: 776 [2022-11-26 01:10:44,210 INFO L226 Difference]: Without dead ends: 774 [2022-11-26 01:10:44,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-11-26 01:10:44,213 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 824 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:44,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [824 Valid, 1299 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 01:10:44,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-11-26 01:10:44,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 764. [2022-11-26 01:10:44,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 506 states have (on average 1.5276679841897234) internal successors, (773), 535 states have internal predecessors, (773), 202 states have call successors, (202), 58 states have call predecessors, (202), 55 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-26 01:10:44,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1189 transitions. [2022-11-26 01:10:44,313 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1189 transitions. Word has length 77 [2022-11-26 01:10:44,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:44,316 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 1189 transitions. [2022-11-26 01:10:44,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-26 01:10:44,317 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1189 transitions. [2022-11-26 01:10:44,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-26 01:10:44,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:44,325 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-11-26 01:10:44,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:44,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:44,534 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:44,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:44,534 INFO L85 PathProgramCache]: Analyzing trace with hash -995897220, now seen corresponding path program 1 times [2022-11-26 01:10:44,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:44,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638656092] [2022-11-26 01:10:44,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:44,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-26 01:10:44,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:44,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638656092] [2022-11-26 01:10:44,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638656092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:44,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:10:44,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:10:44,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91135593] [2022-11-26 01:10:44,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:44,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:10:44,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:44,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:10:44,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:10:44,845 INFO L87 Difference]: Start difference. First operand 764 states and 1189 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-26 01:10:45,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:45,139 INFO L93 Difference]: Finished difference Result 1554 states and 2447 transitions. [2022-11-26 01:10:45,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:10:45,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 108 [2022-11-26 01:10:45,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:45,147 INFO L225 Difference]: With dead ends: 1554 [2022-11-26 01:10:45,148 INFO L226 Difference]: Without dead ends: 802 [2022-11-26 01:10:45,154 INFO L412 NwaCegarLoop]: 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 [2022-11-26 01:10:45,158 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 54 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:45,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1534 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:10:45,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-11-26 01:10:45,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 768. [2022-11-26 01:10:45,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 510 states have (on average 1.5235294117647058) internal successors, (777), 539 states have internal predecessors, (777), 202 states have call successors, (202), 58 states have call predecessors, (202), 55 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-26 01:10:45,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1193 transitions. [2022-11-26 01:10:45,234 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1193 transitions. Word has length 108 [2022-11-26 01:10:45,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:45,235 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1193 transitions. [2022-11-26 01:10:45,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-26 01:10:45,235 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1193 transitions. [2022-11-26 01:10:45,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-26 01:10:45,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:45,239 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 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] [2022-11-26 01:10:45,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 01:10:45,240 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:45,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:45,242 INFO L85 PathProgramCache]: Analyzing trace with hash 366160612, now seen corresponding path program 1 times [2022-11-26 01:10:45,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:45,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605867011] [2022-11-26 01:10:45,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:45,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-26 01:10:45,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:45,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605867011] [2022-11-26 01:10:45,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605867011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:45,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702138178] [2022-11-26 01:10:45,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:45,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:45,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:45,454 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:45,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:10:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:45,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:10:45,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 01:10:45,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:10:45,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702138178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:45,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:10:45,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 01:10:45,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667335870] [2022-11-26 01:10:45,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:45,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:10:45,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:45,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:10:45,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:10:45,835 INFO L87 Difference]: Start difference. First operand 768 states and 1193 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 01:10:46,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:46,243 INFO L93 Difference]: Finished difference Result 1602 states and 2536 transitions. [2022-11-26 01:10:46,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:10:46,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 111 [2022-11-26 01:10:46,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:46,251 INFO L225 Difference]: With dead ends: 1602 [2022-11-26 01:10:46,252 INFO L226 Difference]: Without dead ends: 846 [2022-11-26 01:10:46,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:10:46,259 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 213 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1308 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 [2022-11-26 01:10:46,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1308 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:10:46,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-11-26 01:10:46,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 846. [2022-11-26 01:10:46,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 586 states have (on average 1.575085324232082) internal successors, (923), 615 states have internal predecessors, (923), 202 states have call successors, (202), 60 states have call predecessors, (202), 57 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-26 01:10:46,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1339 transitions. [2022-11-26 01:10:46,354 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1339 transitions. Word has length 111 [2022-11-26 01:10:46,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:46,355 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1339 transitions. [2022-11-26 01:10:46,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 01:10:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1339 transitions. [2022-11-26 01:10:46,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-26 01:10:46,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:46,360 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 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] [2022-11-26 01:10:46,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:46,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:46,569 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:46,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:46,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1901863161, now seen corresponding path program 1 times [2022-11-26 01:10:46,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:46,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750173423] [2022-11-26 01:10:46,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:46,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-26 01:10:46,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:46,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750173423] [2022-11-26 01:10:46,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750173423] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:46,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57476853] [2022-11-26 01:10:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:46,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:46,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:46,742 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:46,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:10:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:47,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:10:47,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 01:10:47,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:10:47,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57476853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:47,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:10:47,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 01:10:47,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767960902] [2022-11-26 01:10:47,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:47,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:10:47,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:47,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:10:47,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:10:47,119 INFO L87 Difference]: Start difference. First operand 846 states and 1339 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 01:10:47,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:47,511 INFO L93 Difference]: Finished difference Result 1758 states and 2826 transitions. [2022-11-26 01:10:47,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:10:47,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 116 [2022-11-26 01:10:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:47,521 INFO L225 Difference]: With dead ends: 1758 [2022-11-26 01:10:47,521 INFO L226 Difference]: Without dead ends: 924 [2022-11-26 01:10:47,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:10:47,530 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 211 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1308 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 [2022-11-26 01:10:47,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1308 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:10:47,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-11-26 01:10:47,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 924. [2022-11-26 01:10:47,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 662 states have (on average 1.6148036253776434) internal successors, (1069), 691 states have internal predecessors, (1069), 202 states have call successors, (202), 62 states have call predecessors, (202), 59 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-26 01:10:47,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1485 transitions. [2022-11-26 01:10:47,592 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1485 transitions. Word has length 116 [2022-11-26 01:10:47,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:47,593 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1485 transitions. [2022-11-26 01:10:47,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 01:10:47,593 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1485 transitions. [2022-11-26 01:10:47,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-26 01:10:47,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:47,597 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 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] [2022-11-26 01:10:47,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-26 01:10:47,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:47,805 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:47,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:47,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1694996329, now seen corresponding path program 1 times [2022-11-26 01:10:47,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:47,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97103179] [2022-11-26 01:10:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:47,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-26 01:10:47,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:47,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97103179] [2022-11-26 01:10:47,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97103179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:47,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137589798] [2022-11-26 01:10:47,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:47,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:47,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:47,962 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:47,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:10:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:48,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 1291 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:10:48,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 01:10:48,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:10:48,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137589798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:48,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:10:48,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 01:10:48,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117528470] [2022-11-26 01:10:48,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:48,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:10:48,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:48,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:10:48,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:10:48,371 INFO L87 Difference]: Start difference. First operand 924 states and 1485 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, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 01:10:48,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:48,714 INFO L93 Difference]: Finished difference Result 1914 states and 3116 transitions. [2022-11-26 01:10:48,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:10:48,715 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, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 120 [2022-11-26 01:10:48,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:48,721 INFO L225 Difference]: With dead ends: 1914 [2022-11-26 01:10:48,722 INFO L226 Difference]: Without dead ends: 1002 [2022-11-26 01:10:48,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:10:48,727 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 209 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:48,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1308 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:10:48,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-11-26 01:10:48,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 1002. [2022-11-26 01:10:48,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 738 states have (on average 1.646341463414634) internal successors, (1215), 767 states have internal predecessors, (1215), 202 states have call successors, (202), 64 states have call predecessors, (202), 61 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-26 01:10:48,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1631 transitions. [2022-11-26 01:10:48,804 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1631 transitions. Word has length 120 [2022-11-26 01:10:48,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:48,804 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1631 transitions. [2022-11-26 01:10:48,805 INFO L496 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, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 01:10:48,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1631 transitions. [2022-11-26 01:10:48,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-26 01:10:48,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:48,812 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 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] [2022-11-26 01:10:48,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:49,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:49,020 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:49,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:49,020 INFO L85 PathProgramCache]: Analyzing trace with hash -738476540, now seen corresponding path program 1 times [2022-11-26 01:10:49,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:49,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409797191] [2022-11-26 01:10:49,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:49,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-26 01:10:49,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:49,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409797191] [2022-11-26 01:10:49,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409797191] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:49,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546016591] [2022-11-26 01:10:49,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:49,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:49,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:49,157 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:49,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:10:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:49,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:10:49,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-26 01:10:49,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:10:49,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546016591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:49,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:10:49,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 01:10:49,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496526767] [2022-11-26 01:10:49,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:49,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:10:49,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:49,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:10:49,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:10:49,524 INFO L87 Difference]: Start difference. First operand 1002 states and 1631 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, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 01:10:49,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:49,880 INFO L93 Difference]: Finished difference Result 2070 states and 3406 transitions. [2022-11-26 01:10:49,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:10:49,881 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, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 123 [2022-11-26 01:10:49,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:49,895 INFO L225 Difference]: With dead ends: 2070 [2022-11-26 01:10:49,896 INFO L226 Difference]: Without dead ends: 1080 [2022-11-26 01:10:49,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:10:49,905 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 207 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1308 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 [2022-11-26 01:10:49,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1308 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:10:49,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-11-26 01:10:49,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1080. [2022-11-26 01:10:49,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 814 states have (on average 1.671990171990172) internal successors, (1361), 843 states have internal predecessors, (1361), 202 states have call successors, (202), 66 states have call predecessors, (202), 63 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-26 01:10:49,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1777 transitions. [2022-11-26 01:10:49,999 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1777 transitions. Word has length 123 [2022-11-26 01:10:50,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:50,000 INFO L495 AbstractCegarLoop]: Abstraction has 1080 states and 1777 transitions. [2022-11-26 01:10:50,001 INFO L496 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, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 01:10:50,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1777 transitions. [2022-11-26 01:10:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-26 01:10:50,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:50,006 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 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] [2022-11-26 01:10:50,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:50,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 01:10:50,215 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:50,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:50,215 INFO L85 PathProgramCache]: Analyzing trace with hash -2041905646, now seen corresponding path program 1 times [2022-11-26 01:10:50,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:50,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607653840] [2022-11-26 01:10:50,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:50,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-26 01:10:50,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:50,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607653840] [2022-11-26 01:10:50,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607653840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:50,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407028631] [2022-11-26 01:10:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:50,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:50,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:50,456 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:50,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:10:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:50,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 1290 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-26 01:10:50,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-26 01:10:52,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:11:45,769 WARN L233 SmtUtils]: Spent 50.11s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-26 01:11:48,877 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-26 01:11:48,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407028631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:11:48,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1743656816] [2022-11-26 01:11:48,902 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2022-11-26 01:11:48,903 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:11:48,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:11:48,914 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:11:48,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:11:52,125 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-26 01:11:56,220 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-26 01:11:56,899 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 570 for LOIs [2022-11-26 01:12:24,128 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 66 for LOIs [2022-11-26 01:12:24,135 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 63 for LOIs [2022-11-26 01:12:24,215 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 111 for LOIs [2022-11-26 01:12:24,890 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-26 01:12:25,049 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 437 for LOIs [2022-11-26 01:12:25,877 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 499 for LOIs [2022-11-26 01:12:26,080 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 84 for LOIs [2022-11-26 01:12:26,099 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:12:49,758 WARN L233 SmtUtils]: Spent 7.28s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:12:57,387 WARN L233 SmtUtils]: Spent 7.25s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:13:06,583 WARN L233 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:13:30,536 WARN L233 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 610 DAG size of output: 585 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:13:36,573 WARN L233 SmtUtils]: Spent 5.56s on a formula simplification. DAG size of input: 610 DAG size of output: 585 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:13:42,589 WARN L233 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 606 DAG size of output: 581 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:14:35,859 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26163#(and (<= 0 |timeShift_processWaitingOnFloor_#in~floorID#1|) (= |old(~floorButtons_2~0)| 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 0)) (<= ~floorButtons_3~0 0) (= ~executiveFloor~0 4) (= |timeShift_processWaitingOnFloor_~tmp___2~2#1| 0) (= |old(~persons_1~0)| 0) (<= ~currentHeading~0 1) (= |old(~persons_5~0)| 0) (= |old(~doorState~0)| 1) (= |old(~persons_2~0)| 0) (= |timeShift_processWaitingOnFloor_~tmp___6~1#1| 0) (= ~persons_5~0 0) (= |old(~persons_4~0)| 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| 0) (<= ~personOnFloor_5_1~0 1) (= |old(~floorButtons_0~0)| 0) (<= ~weight~0 0) (<= ~floorButtons_0~0 0) (<= 0 ~floorButtons_1~0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 0 ~floorButtons_2~0) (<= |timeShift_resetFloorButton_#in~floorID#1| 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (= |timeShift_processWaitingOnFloor_~tmp___0~5#1| 0) (<= ~calls_0~0 0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1|)) (= ~head~0.offset 0) (= |old(~weight~0)| 0) (<= 0 |timeShift_resetFloorButton_#in~floorID#1|) (= ~persons_4~0 0) (<= |timeShift_processWaitingOnFloor_#in~floorID#1| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (<= 0 ~floorButtons_3~0) (<= 0 |timeShift_~tmp___9~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (<= 0 |timeShift_processWaitingOnFloor_~floorID#1|) (<= 0 |timeShift_resetFloorButton_~floorID#1|) (<= ~floorButtons_2~0 0) (= ~persons_3~0 0) (= |old(~floorButtons_4~0)| 0) (= |old(~persons_0~0)| 0) (<= 0 ~floorButtons_0~0) (= ~doorState~0 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (= |timeShift_processWaitingOnFloor_~tmp___10~0#1| 0) (<= 1 ~currentHeading~0) (<= 0 ~calls_0~0) (= |old(~persons_3~0)| 0) (= ~persons_1~0 0) (= ~persons_0~0 0) (= |old(~floorButtons_3~0)| 0) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= 1 ~personOnFloor_5_1~0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 2147483647) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1| 0) (= |#NULL.offset| 0) (<= ~floorButtons_4~0 0) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (= |old(~currentHeading~0)| 1) (= |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 0) (= |timeShift_processWaitingOnFloor_~tmp___8~1#1| 0) (<= |timeShift_resetFloorButton_~floorID#1| 0) (= |old(~personOnFloor_5_1~0)| 1) (= 1 |old(~calls_1~0)|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 ~floorButtons_4~0) (= |old(~floorButtons_1~0)| 0) (= |old(~currentFloorID~0)| 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (<= 0 ~weight~0) (<= ~floorButtons_1~0 0) (<= |timeShift_processWaitingOnFloor_~floorID#1| 0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (= ~cleanupTimeShifts~0 12) (= |timeShift_processWaitingOnFloor_~tmp___4~1#1| 0) (= |#NULL.base| 0) (= ~persons_2~0 0))' at error location [2022-11-26 01:14:35,859 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:14:35,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:14:35,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 16] total 32 [2022-11-26 01:14:35,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563802475] [2022-11-26 01:14:35,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:14:35,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-26 01:14:35,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:14:35,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-26 01:14:35,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=7027, Unknown=0, NotChecked=0, Total=7832 [2022-11-26 01:14:35,867 INFO L87 Difference]: Start difference. First operand 1080 states and 1777 transitions. Second operand has 32 states, 23 states have (on average 7.434782608695652) internal successors, (171), 24 states have internal predecessors, (171), 9 states have call successors, (47), 8 states have call predecessors, (47), 15 states have return successors, (46), 16 states have call predecessors, (46), 9 states have call successors, (46) [2022-11-26 01:14:55,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:14:55,190 INFO L93 Difference]: Finished difference Result 3455 states and 5745 transitions. [2022-11-26 01:14:55,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-26 01:14:55,191 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 23 states have (on average 7.434782608695652) internal successors, (171), 24 states have internal predecessors, (171), 9 states have call successors, (47), 8 states have call predecessors, (47), 15 states have return successors, (46), 16 states have call predecessors, (46), 9 states have call successors, (46) Word has length 125 [2022-11-26 01:14:55,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:14:55,207 INFO L225 Difference]: With dead ends: 3455 [2022-11-26 01:14:55,208 INFO L226 Difference]: Without dead ends: 1904 [2022-11-26 01:14:55,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 290 SyntacticMatches, 18 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7668 ImplicationChecksByTransitivity, 134.3s TimeCoverageRelationStatistics Valid=1859, Invalid=17881, Unknown=0, NotChecked=0, Total=19740 [2022-11-26 01:14:55,227 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 3961 mSDsluCounter, 3579 mSDsCounter, 0 mSdLazyCounter, 15364 mSolverCounterSat, 2277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4006 SdHoareTripleChecker+Valid, 3898 SdHoareTripleChecker+Invalid, 17641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2277 IncrementalHoareTripleChecker+Valid, 15364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:14:55,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4006 Valid, 3898 Invalid, 17641 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2277 Valid, 15364 Invalid, 0 Unknown, 0 Unchecked, 15.0s Time] [2022-11-26 01:14:55,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2022-11-26 01:14:55,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1761. [2022-11-26 01:14:55,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1262 states have (on average 1.5736925515055467) internal successors, (1986), 1324 states have internal predecessors, (1986), 372 states have call successors, (372), 132 states have call predecessors, (372), 126 states have return successors, (414), 352 states have call predecessors, (414), 369 states have call successors, (414) [2022-11-26 01:14:55,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2772 transitions. [2022-11-26 01:14:55,415 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2772 transitions. Word has length 125 [2022-11-26 01:14:55,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:14:55,416 INFO L495 AbstractCegarLoop]: Abstraction has 1761 states and 2772 transitions. [2022-11-26 01:14:55,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 23 states have (on average 7.434782608695652) internal successors, (171), 24 states have internal predecessors, (171), 9 states have call successors, (47), 8 states have call predecessors, (47), 15 states have return successors, (46), 16 states have call predecessors, (46), 9 states have call successors, (46) [2022-11-26 01:14:55,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2772 transitions. [2022-11-26 01:14:55,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-26 01:14:55,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:14:55,425 INFO L195 NwaCegarLoop]: 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] [2022-11-26 01:14:55,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 01:14:55,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:14:55,635 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:14:55,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:14:55,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1346410445, now seen corresponding path program 1 times [2022-11-26 01:14:55,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:14:55,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108669821] [2022-11-26 01:14:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:55,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:14:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-26 01:14:55,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:14:55,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108669821] [2022-11-26 01:14:55,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108669821] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:14:55,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650659732] [2022-11-26 01:14:55,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:55,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:14:55,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:14:55,978 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:14:55,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:14:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:56,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:14:56,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:14:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-26 01:14:56,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:14:56,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650659732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:14:56,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:14:56,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-26 01:14:56,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427327841] [2022-11-26 01:14:56,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:14:56,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:14:56,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:14:56,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:14:56,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-26 01:14:56,507 INFO L87 Difference]: Start difference. First operand 1761 states and 2772 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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) [2022-11-26 01:14:57,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:14:57,644 INFO L93 Difference]: Finished difference Result 3327 states and 5238 transitions. [2022-11-26 01:14:57,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:14:57,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 130 [2022-11-26 01:14:57,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:14:57,659 INFO L225 Difference]: With dead ends: 3327 [2022-11-26 01:14:57,660 INFO L226 Difference]: Without dead ends: 1579 [2022-11-26 01:14:57,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-26 01:14:57,673 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 340 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:14:57,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 1986 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 01:14:57,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2022-11-26 01:14:57,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1555. [2022-11-26 01:14:57,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1134 states have (on average 1.5864197530864197) internal successors, (1799), 1180 states have internal predecessors, (1799), 309 states have call successors, (309), 116 states have call predecessors, (309), 111 states have return successors, (338), 294 states have call predecessors, (338), 306 states have call successors, (338) [2022-11-26 01:14:57,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2446 transitions. [2022-11-26 01:14:57,820 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2446 transitions. Word has length 130 [2022-11-26 01:14:57,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:14:57,821 INFO L495 AbstractCegarLoop]: Abstraction has 1555 states and 2446 transitions. [2022-11-26 01:14:57,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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) [2022-11-26 01:14:57,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2446 transitions. [2022-11-26 01:14:57,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-26 01:14:57,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:14:57,833 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:14:57,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:14:58,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:14:58,042 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:14:58,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:14:58,042 INFO L85 PathProgramCache]: Analyzing trace with hash -386033699, now seen corresponding path program 1 times [2022-11-26 01:14:58,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:14:58,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655399449] [2022-11-26 01:14:58,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:58,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:14:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-26 01:14:58,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:14:58,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655399449] [2022-11-26 01:14:58,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655399449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:14:58,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543863187] [2022-11-26 01:14:58,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:58,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:14:58,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:14:58,800 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:14:58,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 01:14:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:59,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:14:59,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:14:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 63 proven. 10 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-26 01:14:59,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:14:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-26 01:14:59,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543863187] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:14:59,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [928207416] [2022-11-26 01:14:59,923 INFO L159 IcfgInterpreter]: Started Sifa with 113 locations of interest [2022-11-26 01:14:59,924 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:14:59,924 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:14:59,925 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:14:59,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:15:04,839 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2022-11-26 01:15:14,246 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 45 for LOIs [2022-11-26 01:15:14,591 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 21 for LOIs [2022-11-26 01:15:14,613 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 84 for LOIs [2022-11-26 01:15:14,768 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 28 for LOIs [2022-11-26 01:15:14,828 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 55 for LOIs [2022-11-26 01:15:14,844 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 57 for LOIs [2022-11-26 01:15:14,858 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 21 for LOIs [2022-11-26 01:15:14,859 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-26 01:15:18,482 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-26 01:15:19,103 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 34 for LOIs [2022-11-26 01:15:19,157 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 32 for LOIs [2022-11-26 01:15:19,159 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-26 01:15:19,319 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:15:42,005 WARN L233 SmtUtils]: Spent 7.25s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:15:49,715 WARN L233 SmtUtils]: Spent 7.34s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:15:58,892 WARN L233 SmtUtils]: Spent 5.55s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:16:12,225 WARN L233 SmtUtils]: Spent 6.77s on a formula simplification. DAG size of input: 659 DAG size of output: 562 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:16:41,948 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41380#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1| 0)) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 0)) (= ~executiveFloor~0 4) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_areDoorsOpen_#res#1| 2147483648)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| 0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483648)) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1|)) (= ~head~0.offset 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (<= |timeShift_areDoorsOpen_#res#1| 2147483647) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| |timeShift_isExecutiveFloor_#res#1|) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483647) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 2147483647) (= |#NULL.offset| 0) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-11-26 01:16:41,948 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:16:41,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:16:41,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-11-26 01:16:41,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039369658] [2022-11-26 01:16:41,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:16:41,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 01:16:41,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:16:41,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 01:16:41,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1064, Invalid=10492, Unknown=0, NotChecked=0, Total=11556 [2022-11-26 01:16:41,955 INFO L87 Difference]: Start difference. First operand 1555 states and 2446 transitions. Second operand has 25 states, 19 states have (on average 10.68421052631579) internal successors, (203), 21 states have internal predecessors, (203), 13 states have call successors, (66), 7 states have call predecessors, (66), 9 states have return successors, (64), 14 states have call predecessors, (64), 12 states have call successors, (64) [2022-11-26 01:17:01,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:17:01,060 INFO L93 Difference]: Finished difference Result 5716 states and 9215 transitions. [2022-11-26 01:17:01,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-26 01:17:01,061 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 10.68421052631579) internal successors, (203), 21 states have internal predecessors, (203), 13 states have call successors, (66), 7 states have call predecessors, (66), 9 states have return successors, (64), 14 states have call predecessors, (64), 12 states have call successors, (64) Word has length 188 [2022-11-26 01:17:01,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:17:01,094 INFO L225 Difference]: With dead ends: 5716 [2022-11-26 01:17:01,094 INFO L226 Difference]: Without dead ends: 4123 [2022-11-26 01:17:01,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 497 SyntacticMatches, 11 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11391 ImplicationChecksByTransitivity, 85.0s TimeCoverageRelationStatistics Valid=2272, Invalid=25784, Unknown=0, NotChecked=0, Total=28056 [2022-11-26 01:17:01,120 INFO L413 NwaCegarLoop]: 540 mSDtfsCounter, 4503 mSDsluCounter, 5264 mSDsCounter, 0 mSdLazyCounter, 20690 mSolverCounterSat, 3380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4525 SdHoareTripleChecker+Valid, 5804 SdHoareTripleChecker+Invalid, 24070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 3380 IncrementalHoareTripleChecker+Valid, 20690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:17:01,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4525 Valid, 5804 Invalid, 24070 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [3380 Valid, 20690 Invalid, 0 Unknown, 0 Unchecked, 15.9s Time] [2022-11-26 01:17:01,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2022-11-26 01:17:01,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3779. [2022-11-26 01:17:01,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3779 states, 2781 states have (on average 1.5329018338727076) internal successors, (4263), 2861 states have internal predecessors, (4263), 704 states have call successors, (704), 302 states have call predecessors, (704), 293 states have return successors, (815), 675 states have call predecessors, (815), 696 states have call successors, (815) [2022-11-26 01:17:01,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3779 states to 3779 states and 5782 transitions. [2022-11-26 01:17:01,495 INFO L78 Accepts]: Start accepts. Automaton has 3779 states and 5782 transitions. Word has length 188 [2022-11-26 01:17:01,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:17:01,496 INFO L495 AbstractCegarLoop]: Abstraction has 3779 states and 5782 transitions. [2022-11-26 01:17:01,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 10.68421052631579) internal successors, (203), 21 states have internal predecessors, (203), 13 states have call successors, (66), 7 states have call predecessors, (66), 9 states have return successors, (64), 14 states have call predecessors, (64), 12 states have call successors, (64) [2022-11-26 01:17:01,496 INFO L276 IsEmpty]: Start isEmpty. Operand 3779 states and 5782 transitions. [2022-11-26 01:17:01,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-11-26 01:17:01,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:17:01,529 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 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] [2022-11-26 01:17:01,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 01:17:01,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 01:17:01,738 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:17:01,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:17:01,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1757768388, now seen corresponding path program 1 times [2022-11-26 01:17:01,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:17:01,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141137009] [2022-11-26 01:17:01,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:17:01,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:17:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:17:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 23 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-11-26 01:17:02,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:17:02,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141137009] [2022-11-26 01:17:02,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141137009] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:17:02,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163863494] [2022-11-26 01:17:02,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:17:02,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:17:02,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:17:02,308 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:17:02,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 01:17:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:17:02,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 2062 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:17:02,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:17:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 97 proven. 18 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-11-26 01:17:03,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:17:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 23 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-11-26 01:17:03,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163863494] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:17:03,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [327673959] [2022-11-26 01:17:03,679 INFO L159 IcfgInterpreter]: Started Sifa with 113 locations of interest [2022-11-26 01:17:03,679 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:17:03,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:17:03,680 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:17:03,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:17:09,366 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2022-11-26 01:17:19,119 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 45 for LOIs [2022-11-26 01:17:19,465 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 21 for LOIs [2022-11-26 01:17:19,486 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 84 for LOIs [2022-11-26 01:17:19,662 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 28 for LOIs [2022-11-26 01:17:19,726 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 55 for LOIs [2022-11-26 01:17:19,749 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 57 for LOIs [2022-11-26 01:17:19,770 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 21 for LOIs [2022-11-26 01:17:19,772 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-26 01:17:23,872 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-26 01:17:24,496 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 34 for LOIs [2022-11-26 01:17:24,566 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 32 for LOIs [2022-11-26 01:17:24,576 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-26 01:17:24,746 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:17:47,600 WARN L233 SmtUtils]: Spent 7.29s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:17:55,287 WARN L233 SmtUtils]: Spent 7.31s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:18:04,379 WARN L233 SmtUtils]: Spent 5.49s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:18:17,863 WARN L233 SmtUtils]: Spent 6.72s on a formula simplification. DAG size of input: 659 DAG size of output: 562 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:18:55,101 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '56056#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1| 0)) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 0)) (= ~executiveFloor~0 4) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_areDoorsOpen_#res#1| 2147483648)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| 0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483648)) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1|)) (= ~head~0.offset 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (<= |timeShift_areDoorsOpen_#res#1| 2147483647) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| |timeShift_isExecutiveFloor_#res#1|) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483647) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 2147483647) (= |#NULL.offset| 0) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-11-26 01:18:55,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:18:55,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:18:55,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-11-26 01:18:55,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337045970] [2022-11-26 01:18:55,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:18:55,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 01:18:55,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:18:55,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 01:18:55,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1147, Invalid=10409, Unknown=0, NotChecked=0, Total=11556 [2022-11-26 01:18:55,106 INFO L87 Difference]: Start difference. First operand 3779 states and 5782 transitions. Second operand has 25 states, 19 states have (on average 10.0) internal successors, (190), 22 states have internal predecessors, (190), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) [2022-11-26 01:19:03,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:19:03,330 INFO L93 Difference]: Finished difference Result 7497 states and 11445 transitions. [2022-11-26 01:19:03,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-26 01:19:03,331 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 10.0) internal successors, (190), 22 states have internal predecessors, (190), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) Word has length 246 [2022-11-26 01:19:03,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:19:03,375 INFO L225 Difference]: With dead ends: 7497 [2022-11-26 01:19:03,375 INFO L226 Difference]: Without dead ends: 4773 [2022-11-26 01:19:03,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 637 SyntacticMatches, 18 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6809 ImplicationChecksByTransitivity, 92.1s TimeCoverageRelationStatistics Valid=1647, Invalid=14865, Unknown=0, NotChecked=0, Total=16512 [2022-11-26 01:19:03,402 INFO L413 NwaCegarLoop]: 1007 mSDtfsCounter, 2067 mSDsluCounter, 11176 mSDsCounter, 0 mSdLazyCounter, 7767 mSolverCounterSat, 1265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2087 SdHoareTripleChecker+Valid, 12183 SdHoareTripleChecker+Invalid, 9032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1265 IncrementalHoareTripleChecker+Valid, 7767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:19:03,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2087 Valid, 12183 Invalid, 9032 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1265 Valid, 7767 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-26 01:19:03,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4773 states. [2022-11-26 01:19:03,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4773 to 4649. [2022-11-26 01:19:03,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4649 states, 3408 states have (on average 1.4838615023474178) internal successors, (5057), 3491 states have internal predecessors, (5057), 859 states have call successors, (859), 392 states have call predecessors, (859), 381 states have return successors, (1054), 825 states have call predecessors, (1054), 849 states have call successors, (1054) [2022-11-26 01:19:04,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4649 states to 4649 states and 6970 transitions. [2022-11-26 01:19:04,029 INFO L78 Accepts]: Start accepts. Automaton has 4649 states and 6970 transitions. Word has length 246 [2022-11-26 01:19:04,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:19:04,030 INFO L495 AbstractCegarLoop]: Abstraction has 4649 states and 6970 transitions. [2022-11-26 01:19:04,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 10.0) internal successors, (190), 22 states have internal predecessors, (190), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) [2022-11-26 01:19:04,031 INFO L276 IsEmpty]: Start isEmpty. Operand 4649 states and 6970 transitions. [2022-11-26 01:19:04,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-11-26 01:19:04,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:19:04,080 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:19:04,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 01:19:04,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 01:19:04,292 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:19:04,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:19:04,292 INFO L85 PathProgramCache]: Analyzing trace with hash 974902429, now seen corresponding path program 1 times [2022-11-26 01:19:04,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:19:04,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537960327] [2022-11-26 01:19:04,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:19:04,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:19:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:19:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2022-11-26 01:19:04,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:19:04,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537960327] [2022-11-26 01:19:04,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537960327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:19:04,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:19:04,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:19:04,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955004712] [2022-11-26 01:19:04,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:19:04,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:19:04,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:19:04,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:19:04,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:19:04,523 INFO L87 Difference]: Start difference. First operand 4649 states and 6970 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-26 01:19:05,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:19:05,197 INFO L93 Difference]: Finished difference Result 8251 states and 12377 transitions. [2022-11-26 01:19:05,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:19:05,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 258 [2022-11-26 01:19:05,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:19:05,260 INFO L225 Difference]: With dead ends: 8251 [2022-11-26 01:19:05,260 INFO L226 Difference]: Without dead ends: 4747 [2022-11-26 01:19:05,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:19:05,286 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 351 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:19:05,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 1005 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:19:05,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4747 states. [2022-11-26 01:19:05,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4747 to 4725. [2022-11-26 01:19:05,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4725 states, 3458 states have (on average 1.4641411220358589) internal successors, (5063), 3541 states have internal predecessors, (5063), 873 states have call successors, (873), 404 states have call predecessors, (873), 393 states have return successors, (1066), 839 states have call predecessors, (1066), 863 states have call successors, (1066) [2022-11-26 01:19:05,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4725 states to 4725 states and 7002 transitions. [2022-11-26 01:19:05,789 INFO L78 Accepts]: Start accepts. Automaton has 4725 states and 7002 transitions. Word has length 258 [2022-11-26 01:19:05,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:19:05,790 INFO L495 AbstractCegarLoop]: Abstraction has 4725 states and 7002 transitions. [2022-11-26 01:19:05,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-26 01:19:05,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4725 states and 7002 transitions. [2022-11-26 01:19:05,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-11-26 01:19:05,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:19:05,891 INFO L195 NwaCegarLoop]: trace histogram [18, 14, 14, 14, 14, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:19:05,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 01:19:05,891 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:19:05,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:19:05,892 INFO L85 PathProgramCache]: Analyzing trace with hash -2131585175, now seen corresponding path program 1 times [2022-11-26 01:19:05,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:19:05,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452082931] [2022-11-26 01:19:05,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:19:05,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:19:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:19:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 53 proven. 24 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2022-11-26 01:19:06,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:19:06,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452082931] [2022-11-26 01:19:06,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452082931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:19:06,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373143272] [2022-11-26 01:19:06,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:19:06,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:19:06,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:19:06,431 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:19:06,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 01:19:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:19:07,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 3414 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:19:07,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:19:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 371 proven. 0 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2022-11-26 01:19:07,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:19:07,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373143272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:19:07,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:19:07,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-26 01:19:07,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642415531] [2022-11-26 01:19:07,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:19:07,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:19:07,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:19:07,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:19:07,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:19:07,211 INFO L87 Difference]: Start difference. First operand 4725 states and 7002 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2022-11-26 01:19:07,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:19:07,693 INFO L93 Difference]: Finished difference Result 7796 states and 11589 transitions. [2022-11-26 01:19:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:19:07,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 401 [2022-11-26 01:19:07,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:19:07,720 INFO L225 Difference]: With dead ends: 7796 [2022-11-26 01:19:07,720 INFO L226 Difference]: Without dead ends: 4659 [2022-11-26 01:19:07,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:19:07,735 INFO L413 NwaCegarLoop]: 585 mSDtfsCounter, 401 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:19:07,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 989 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:19:07,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4659 states. [2022-11-26 01:19:08,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4659 to 4637. [2022-11-26 01:19:08,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 3380 states have (on average 1.4588757396449703) internal successors, (4931), 3463 states have internal predecessors, (4931), 863 states have call successors, (863), 404 states have call predecessors, (863), 393 states have return successors, (1042), 829 states have call predecessors, (1042), 853 states have call successors, (1042) [2022-11-26 01:19:08,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 6836 transitions. [2022-11-26 01:19:08,245 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 6836 transitions. Word has length 401 [2022-11-26 01:19:08,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:19:08,245 INFO L495 AbstractCegarLoop]: Abstraction has 4637 states and 6836 transitions. [2022-11-26 01:19:08,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2022-11-26 01:19:08,246 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 6836 transitions. [2022-11-26 01:19:08,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-11-26 01:19:08,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:19:08,280 INFO L195 NwaCegarLoop]: trace histogram [15, 11, 11, 11, 11, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:19:08,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 01:19:08,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 01:19:08,498 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:19:08,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:19:08,498 INFO L85 PathProgramCache]: Analyzing trace with hash 96807588, now seen corresponding path program 1 times [2022-11-26 01:19:08,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:19:08,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57896586] [2022-11-26 01:19:08,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:19:08,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:19:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:19:09,045 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 37 proven. 12 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2022-11-26 01:19:09,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:19:09,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57896586] [2022-11-26 01:19:09,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57896586] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:19:09,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213426698] [2022-11-26 01:19:09,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:19:09,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:19:09,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:19:09,048 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:19:09,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 01:19:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:19:09,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 3007 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:19:09,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:19:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 116 proven. 44 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2022-11-26 01:19:10,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:19:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2022-11-26 01:19:10,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213426698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:19:10,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [492891599] [2022-11-26 01:19:10,739 INFO L159 IcfgInterpreter]: Started Sifa with 141 locations of interest [2022-11-26 01:19:10,739 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:19:10,740 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:19:10,740 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:19:10,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:19:18,340 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 555 for LOIs [2022-11-26 01:19:18,801 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 21 for LOIs [2022-11-26 01:19:23,142 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 32 for LOIs [2022-11-26 01:19:23,448 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 42 for LOIs [2022-11-26 01:19:23,493 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 80 for LOIs [2022-11-26 01:19:23,746 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 50 for LOIs [2022-11-26 01:19:23,845 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 21 for LOIs [2022-11-26 01:19:23,853 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 54 for LOIs [2022-11-26 01:19:23,866 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 42 for LOIs [2022-11-26 01:19:23,871 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-26 01:19:27,697 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 36 for LOIs [2022-11-26 01:19:27,762 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 57 for LOIs [2022-11-26 01:19:27,771 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 508 for LOIs [2022-11-26 01:19:30,134 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 778 for LOIs [2022-11-26 01:19:41,421 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 631 for LOIs [2022-11-26 01:19:41,881 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:19:59,250 WARN L233 SmtUtils]: Spent 9.29s on a formula simplification. DAG size of input: 631 DAG size of output: 508 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:20:09,309 WARN L233 SmtUtils]: Spent 9.65s on a formula simplification. DAG size of input: 671 DAG size of output: 522 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:20:16,704 WARN L233 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:20:24,091 WARN L233 SmtUtils]: Spent 7.04s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:20:33,201 WARN L233 SmtUtils]: Spent 8.61s on a formula simplification. DAG size of input: 778 DAG size of output: 644 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:20:56,764 WARN L233 SmtUtils]: Spent 22.70s on a formula simplification. DAG size of input: 846 DAG size of output: 648 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:22:07,106 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '111997#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1| 0)) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 0)) (= ~executiveFloor~0 4) (<= 0 (+ ~currentFloorID~0 2147483648)) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_areDoorsOpen_#res#1| 2147483648)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| 0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483648)) (<= ~currentFloorID~0 2147483647) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1|)) (= ~head~0.offset 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (<= 0 |timeShift_~tmp___9~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (<= |timeShift_areDoorsOpen_#res#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| |timeShift_isExecutiveFloor_#res#1|) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483647) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 2147483647) (= |#NULL.offset| 0) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-11-26 01:22:07,106 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:22:07,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:22:07,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 21 [2022-11-26 01:22:07,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101887444] [2022-11-26 01:22:07,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:22:07,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 01:22:07,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:22:07,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 01:22:07,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1138, Invalid=15118, Unknown=0, NotChecked=0, Total=16256 [2022-11-26 01:22:07,112 INFO L87 Difference]: Start difference. First operand 4637 states and 6836 transitions. Second operand has 21 states, 17 states have (on average 13.941176470588236) internal successors, (237), 18 states have internal predecessors, (237), 8 states have call successors, (81), 5 states have call predecessors, (81), 8 states have return successors, (76), 9 states have call predecessors, (76), 8 states have call successors, (76) [2022-11-26 01:22:14,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:22:14,070 INFO L93 Difference]: Finished difference Result 9765 states and 14477 transitions. [2022-11-26 01:22:14,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-26 01:22:14,071 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 13.941176470588236) internal successors, (237), 18 states have internal predecessors, (237), 8 states have call successors, (81), 5 states have call predecessors, (81), 8 states have return successors, (76), 9 states have call predecessors, (76), 8 states have call successors, (76) Word has length 338 [2022-11-26 01:22:14,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:22:14,098 INFO L225 Difference]: With dead ends: 9765 [2022-11-26 01:22:14,098 INFO L226 Difference]: Without dead ends: 5403 [2022-11-26 01:22:14,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1072 GetRequests, 871 SyntacticMatches, 41 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10596 ImplicationChecksByTransitivity, 147.5s TimeCoverageRelationStatistics Valid=1564, Invalid=24518, Unknown=0, NotChecked=0, Total=26082 [2022-11-26 01:22:14,123 INFO L413 NwaCegarLoop]: 910 mSDtfsCounter, 1267 mSDsluCounter, 10799 mSDsCounter, 0 mSdLazyCounter, 6813 mSolverCounterSat, 756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1283 SdHoareTripleChecker+Valid, 11709 SdHoareTripleChecker+Invalid, 7569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 6813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:22:14,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1283 Valid, 11709 Invalid, 7569 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [756 Valid, 6813 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-26 01:22:14,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5403 states. [2022-11-26 01:22:14,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5403 to 5257. [2022-11-26 01:22:14,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 3830 states have (on average 1.4127937336814622) internal successors, (5411), 3942 states have internal predecessors, (5411), 938 states have call successors, (938), 452 states have call predecessors, (938), 488 states have return successors, (1253), 922 states have call predecessors, (1253), 928 states have call successors, (1253) [2022-11-26 01:22:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 7602 transitions. [2022-11-26 01:22:14,596 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 7602 transitions. Word has length 338 [2022-11-26 01:22:14,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:22:14,597 INFO L495 AbstractCegarLoop]: Abstraction has 5257 states and 7602 transitions. [2022-11-26 01:22:14,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 13.941176470588236) internal successors, (237), 18 states have internal predecessors, (237), 8 states have call successors, (81), 5 states have call predecessors, (81), 8 states have return successors, (76), 9 states have call predecessors, (76), 8 states have call successors, (76) [2022-11-26 01:22:14,597 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 7602 transitions. [2022-11-26 01:22:14,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-11-26 01:22:14,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:22:14,628 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:22:14,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 01:22:14,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:22:14,839 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:22:14,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:22:14,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1591199777, now seen corresponding path program 1 times [2022-11-26 01:22:14,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:22:14,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105418561] [2022-11-26 01:22:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:22:14,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:22:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:22:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2022-11-26 01:22:15,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:22:15,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105418561] [2022-11-26 01:22:15,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105418561] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:22:15,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304332858] [2022-11-26 01:22:15,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:22:15,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:22:15,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:22:15,290 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:22:15,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9043c5c-500c-4370-aa69-9129341d1587/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 01:22:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:22:15,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:22:15,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:22:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 105 proven. 18 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-11-26 01:22:16,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:22:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2022-11-26 01:22:16,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304332858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:22:16,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [620767791] [2022-11-26 01:22:16,391 INFO L159 IcfgInterpreter]: Started Sifa with 111 locations of interest [2022-11-26 01:22:16,392 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:22:16,392 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:22:16,392 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:22:16,392 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:22:21,674 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2022-11-26 01:22:30,717 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 38 for LOIs [2022-11-26 01:22:30,800 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 51 for LOIs [2022-11-26 01:22:30,916 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 88 for LOIs [2022-11-26 01:22:31,118 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 23 for LOIs [2022-11-26 01:22:31,176 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 24 for LOIs [2022-11-26 01:22:31,185 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 73 for LOIs [2022-11-26 01:22:31,198 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 51 for LOIs [2022-11-26 01:22:31,204 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-26 01:22:34,694 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-26 01:22:35,332 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 48 for LOIs [2022-11-26 01:22:35,401 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2022-11-26 01:22:35,408 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-26 01:22:35,556 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:22:57,027 WARN L233 SmtUtils]: Spent 6.89s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:23:04,259 WARN L233 SmtUtils]: Spent 6.93s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:23:12,815 WARN L233 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:23:25,086 WARN L233 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 659 DAG size of output: 562 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)