./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 4e7fbc69 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_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/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_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW --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-4e7fbc6 [2022-11-23 14:25:35,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:25:35,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:25:35,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:25:35,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:25:35,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:25:35,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:25:35,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:25:35,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:25:35,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:25:35,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:25:35,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:25:35,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:25:35,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:25:35,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:25:35,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:25:35,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:25:35,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:25:35,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:25:35,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:25:35,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:25:35,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:25:35,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:25:35,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:25:35,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:25:35,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:25:35,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:25:35,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:25:35,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:25:35,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:25:35,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:25:35,838 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:25:35,840 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:25:35,841 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:25:35,842 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:25:35,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:25:35,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:25:35,844 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:25:35,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:25:35,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:25:35,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:25:35,849 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:25:35,901 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:25:35,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:25:35,902 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:25:35,902 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:25:35,905 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:25:35,905 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:25:35,905 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:25:35,906 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:25:35,919 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:25:35,919 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:25:35,926 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:25:35,926 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:25:35,926 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:25:35,926 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:25:35,927 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:25:35,928 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:25:35,928 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:25:35,929 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:25:35,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:25:35,929 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:25:35,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:25:35,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:25:35,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:25:35,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:25:35,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:25:35,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:25:35,931 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:25:35,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:25:35,931 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:25:35,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:25:35,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:25:35,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:25:35,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:25:35,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:25:35,932 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:25:35,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:25:35,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:25:35,933 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:25:35,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:25:35,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:25:35,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:25:35,933 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_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5643166a994eeb2bd259cf18f0a4b43a93b8e6b433c116ad537f0a1a02a75ec3 [2022-11-23 14:25:36,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:25:36,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:25:36,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:25:36,323 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:25:36,323 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:25:36,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c [2022-11-23 14:25:39,715 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:25:40,178 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:25:40,179 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c [2022-11-23 14:25:40,199 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/data/4918929b1/7f78810ffda34721a1a931a251dd59cd/FLAGf9004a0e3 [2022-11-23 14:25:40,218 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/data/4918929b1/7f78810ffda34721a1a931a251dd59cd [2022-11-23 14:25:40,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:25:40,223 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:25:40,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:25:40,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:25:40,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:25:40,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:25:40" (1/1) ... [2022-11-23 14:25:40,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6108da4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:40, skipping insertion in model container [2022-11-23 14:25:40,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:25:40" (1/1) ... [2022-11-23 14:25:40,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:25:40,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:25:40,872 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_c5271d22-af3b-438c-ac7c-29e004acfe92/sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c[49225,49238] [2022-11-23 14:25:40,957 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:25:40,971 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:25:41,128 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_c5271d22-af3b-438c-ac7c-29e004acfe92/sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c[49225,49238] [2022-11-23 14:25:41,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:25:41,220 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:25:41,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:41 WrapperNode [2022-11-23 14:25:41,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:25:41,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:25:41,222 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:25:41,222 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:25:41,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:41" (1/1) ... [2022-11-23 14:25:41,260 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:41" (1/1) ... [2022-11-23 14:25:41,328 INFO L138 Inliner]: procedures = 91, calls = 333, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 1051 [2022-11-23 14:25:41,329 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:25:41,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:25:41,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:25:41,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:25:41,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:41" (1/1) ... [2022-11-23 14:25:41,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:41" (1/1) ... [2022-11-23 14:25:41,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:41" (1/1) ... [2022-11-23 14:25:41,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:41" (1/1) ... [2022-11-23 14:25:41,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:41" (1/1) ... [2022-11-23 14:25:41,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:41" (1/1) ... [2022-11-23 14:25:41,389 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:41" (1/1) ... [2022-11-23 14:25:41,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:41" (1/1) ... [2022-11-23 14:25:41,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:25:41,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:25:41,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:25:41,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:25:41,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:41" (1/1) ... [2022-11-23 14:25:41,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:25:41,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:25:41,445 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:25:41,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:25:41,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:25:41,501 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-23 14:25:41,501 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-23 14:25:41,501 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-23 14:25:41,502 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-23 14:25:41,502 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-23 14:25:41,502 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-23 14:25:41,502 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-23 14:25:41,502 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-23 14:25:41,502 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-23 14:25:41,503 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-23 14:25:41,503 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-23 14:25:41,503 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-23 14:25:41,503 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-23 14:25:41,503 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-23 14:25:41,503 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-23 14:25:41,503 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-23 14:25:41,503 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-23 14:25:41,504 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-23 14:25:41,504 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-23 14:25:41,504 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-23 14:25:41,504 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-23 14:25:41,504 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-23 14:25:41,505 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-23 14:25:41,505 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-23 14:25:41,505 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-23 14:25:41,505 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-23 14:25:41,505 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-23 14:25:41,505 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-23 14:25:41,505 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-23 14:25:41,506 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-23 14:25:41,506 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-23 14:25:41,506 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-23 14:25:41,506 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-23 14:25:41,506 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-23 14:25:41,506 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-23 14:25:41,506 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-23 14:25:41,507 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-23 14:25:41,507 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-23 14:25:41,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:25:41,507 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-23 14:25:41,507 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-23 14:25:41,507 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-23 14:25:41,508 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-23 14:25:41,508 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-23 14:25:41,508 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-23 14:25:41,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:25:41,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:25:41,508 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-23 14:25:41,508 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-23 14:25:41,701 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:25:41,703 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:25:43,241 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:25:44,355 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:25:44,356 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 14:25:44,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:25:44 BoogieIcfgContainer [2022-11-23 14:25:44,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:25:44,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:25:44,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:25:44,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:25:44,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:25:40" (1/3) ... [2022-11-23 14:25:44,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d2d2b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:25:44, skipping insertion in model container [2022-11-23 14:25:44,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:41" (2/3) ... [2022-11-23 14:25:44,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d2d2b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:25:44, skipping insertion in model container [2022-11-23 14:25:44,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:25:44" (3/3) ... [2022-11-23 14:25:44,377 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product19.cil.c [2022-11-23 14:25:44,402 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:25:44,402 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:25:44,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:25:44,517 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;@429f90b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:25:44,518 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:25:44,526 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) [2022-11-23 14:25:44,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 14:25:44,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:25:44,566 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] [2022-11-23 14:25:44,566 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:25:44,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:25:44,573 INFO L85 PathProgramCache]: Analyzing trace with hash 724049478, now seen corresponding path program 1 times [2022-11-23 14:25:44,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:25:44,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547054919] [2022-11-23 14:25:44,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:44,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:25:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:25:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:25:45,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:25:45,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547054919] [2022-11-23 14:25:45,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547054919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:25:45,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:25:45,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:25:45,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53796154] [2022-11-23 14:25:45,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:25:45,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:25:45,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:25:45,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:25:45,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:25:45,620 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) [2022-11-23 14:25:46,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:25:46,788 INFO L93 Difference]: Finished difference Result 1037 states and 1657 transitions. [2022-11-23 14:25:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:25:46,793 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 [2022-11-23 14:25:46,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:25:46,826 INFO L225 Difference]: With dead ends: 1037 [2022-11-23 14:25:46,827 INFO L226 Difference]: Without dead ends: 685 [2022-11-23 14:25:46,839 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 [2022-11-23 14:25:46,846 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 530 mSDsluCounter, 1644 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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 [2022-11-23 14:25:46,847 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] [2022-11-23 14:25:46,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-11-23 14:25:47,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 679. [2022-11-23 14:25:47,041 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) [2022-11-23 14:25:47,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1076 transitions. [2022-11-23 14:25:47,061 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1076 transitions. Word has length 73 [2022-11-23 14:25:47,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:25:47,063 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 1076 transitions. [2022-11-23 14:25:47,064 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) [2022-11-23 14:25:47,066 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1076 transitions. [2022-11-23 14:25:47,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-23 14:25:47,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:25:47,085 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] [2022-11-23 14:25:47,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:25:47,086 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:25:47,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:25:47,088 INFO L85 PathProgramCache]: Analyzing trace with hash 2105617581, now seen corresponding path program 1 times [2022-11-23 14:25:47,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:25:47,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093718302] [2022-11-23 14:25:47,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:47,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:25:47,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:25:51,432 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:25:51,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:25:51,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093718302] [2022-11-23 14:25:51,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093718302] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:25:51,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946733071] [2022-11-23 14:25:51,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:51,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:25:51,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:25:51,439 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:25:51,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:25:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:25:51,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:25:51,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:25:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:25:52,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:25:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:25:52,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946733071] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 14:25:52,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:25:52,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [19, 4] total 23 [2022-11-23 14:25:52,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763362181] [2022-11-23 14:25:52,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:25:52,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:25:52,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:25:52,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:25:52,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-11-23 14:25:52,492 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) [2022-11-23 14:25:53,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:25:53,380 INFO L93 Difference]: Finished difference Result 776 states and 1223 transitions. [2022-11-23 14:25:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:25:53,381 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 [2022-11-23 14:25:53,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:25:53,391 INFO L225 Difference]: With dead ends: 776 [2022-11-23 14:25:53,391 INFO L226 Difference]: Without dead ends: 774 [2022-11-23 14:25:53,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-11-23 14:25:53,394 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 830 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:25:53,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 1299 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:25:53,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-11-23 14:25:53,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 764. [2022-11-23 14:25:53,477 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) [2022-11-23 14:25:53,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1189 transitions. [2022-11-23 14:25:53,491 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1189 transitions. Word has length 77 [2022-11-23 14:25:53,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:25:53,494 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 1189 transitions. [2022-11-23 14:25:53,494 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) [2022-11-23 14:25:53,494 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1189 transitions. [2022-11-23 14:25:53,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-23 14:25:53,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:25:53,502 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] [2022-11-23 14:25:53,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:25:53,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:25:53,716 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:25:53,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:25:53,717 INFO L85 PathProgramCache]: Analyzing trace with hash -995897220, now seen corresponding path program 1 times [2022-11-23 14:25:53,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:25:53,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837786854] [2022-11-23 14:25:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:53,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:25:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:25:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-23 14:25:53,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:25:53,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837786854] [2022-11-23 14:25:53,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837786854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:25:53,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:25:53,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:25:53,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055854187] [2022-11-23 14:25:53,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:25:53,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:25:53,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:25:53,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:25:53,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:25:53,925 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) [2022-11-23 14:25:54,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:25:54,205 INFO L93 Difference]: Finished difference Result 1554 states and 2447 transitions. [2022-11-23 14:25:54,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:25:54,206 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 [2022-11-23 14:25:54,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:25:54,212 INFO L225 Difference]: With dead ends: 1554 [2022-11-23 14:25:54,212 INFO L226 Difference]: Without dead ends: 802 [2022-11-23 14:25:54,217 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 [2022-11-23 14:25:54,221 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 [2022-11-23 14:25:54,222 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] [2022-11-23 14:25:54,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-11-23 14:25:54,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 768. [2022-11-23 14:25:54,277 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) [2022-11-23 14:25:54,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1193 transitions. [2022-11-23 14:25:54,289 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1193 transitions. Word has length 108 [2022-11-23 14:25:54,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:25:54,289 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1193 transitions. [2022-11-23 14:25:54,290 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) [2022-11-23 14:25:54,290 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1193 transitions. [2022-11-23 14:25:54,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-23 14:25:54,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:25:54,297 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] [2022-11-23 14:25:54,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:25:54,298 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:25:54,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:25:54,299 INFO L85 PathProgramCache]: Analyzing trace with hash 366160612, now seen corresponding path program 1 times [2022-11-23 14:25:54,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:25:54,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054300189] [2022-11-23 14:25:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:54,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:25:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:25:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-23 14:25:54,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:25:54,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054300189] [2022-11-23 14:25:54,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054300189] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:25:54,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835435001] [2022-11-23 14:25:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:54,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:25:54,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:25:54,454 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:25:54,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:25:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:25:54,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:25:54,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:25:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:25:54,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:25:54,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835435001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:25:54,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:25:54,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 14:25:54,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604795738] [2022-11-23 14:25:54,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:25:54,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:25:54,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:25:54,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:25:54,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:25:54,840 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) [2022-11-23 14:25:55,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:25:55,204 INFO L93 Difference]: Finished difference Result 1602 states and 2536 transitions. [2022-11-23 14:25:55,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:25:55,205 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 [2022-11-23 14:25:55,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:25:55,211 INFO L225 Difference]: With dead ends: 1602 [2022-11-23 14:25:55,211 INFO L226 Difference]: Without dead ends: 846 [2022-11-23 14:25:55,216 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 [2022-11-23 14:25:55,217 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 [2022-11-23 14:25:55,220 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] [2022-11-23 14:25:55,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-11-23 14:25:55,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 846. [2022-11-23 14:25:55,269 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) [2022-11-23 14:25:55,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1339 transitions. [2022-11-23 14:25:55,281 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1339 transitions. Word has length 111 [2022-11-23 14:25:55,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:25:55,282 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1339 transitions. [2022-11-23 14:25:55,282 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) [2022-11-23 14:25:55,282 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1339 transitions. [2022-11-23 14:25:55,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-23 14:25:55,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:25:55,289 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] [2022-11-23 14:25:55,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 14:25:55,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:25:55,496 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:25:55,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:25:55,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1901863161, now seen corresponding path program 1 times [2022-11-23 14:25:55,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:25:55,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089656261] [2022-11-23 14:25:55,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:55,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:25:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:25:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-23 14:25:55,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:25:55,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089656261] [2022-11-23 14:25:55,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089656261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:25:55,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396922898] [2022-11-23 14:25:55,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:55,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:25:55,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:25:55,668 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:25:55,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:25:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:25:55,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:25:55,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:25:56,013 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 14:25:56,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:25:56,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396922898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:25:56,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:25:56,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 14:25:56,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423622649] [2022-11-23 14:25:56,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:25:56,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:25:56,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:25:56,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:25:56,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:25:56,022 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) [2022-11-23 14:25:56,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:25:56,368 INFO L93 Difference]: Finished difference Result 1758 states and 2826 transitions. [2022-11-23 14:25:56,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:25:56,369 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 [2022-11-23 14:25:56,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:25:56,376 INFO L225 Difference]: With dead ends: 1758 [2022-11-23 14:25:56,376 INFO L226 Difference]: Without dead ends: 924 [2022-11-23 14:25:56,382 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 [2022-11-23 14:25:56,382 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 [2022-11-23 14:25:56,383 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] [2022-11-23 14:25:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-11-23 14:25:56,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 924. [2022-11-23 14:25:56,430 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) [2022-11-23 14:25:56,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1485 transitions. [2022-11-23 14:25:56,440 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1485 transitions. Word has length 116 [2022-11-23 14:25:56,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:25:56,440 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1485 transitions. [2022-11-23 14:25:56,441 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) [2022-11-23 14:25:56,441 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1485 transitions. [2022-11-23 14:25:56,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-23 14:25:56,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:25:56,446 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] [2022-11-23 14:25:56,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:25:56,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:25:56,654 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:25:56,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:25:56,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1694996329, now seen corresponding path program 1 times [2022-11-23 14:25:56,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:25:56,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875733043] [2022-11-23 14:25:56,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:56,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:25:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:25:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-23 14:25:56,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:25:56,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875733043] [2022-11-23 14:25:56,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875733043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:25:56,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471868050] [2022-11-23 14:25:56,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:56,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:25:56,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:25:56,851 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:25:56,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:25:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:25:57,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 1291 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:25:57,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:25:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 14:25:57,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:25:57,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471868050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:25:57,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:25:57,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 14:25:57,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886079917] [2022-11-23 14:25:57,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:25:57,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:25:57,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:25:57,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:25:57,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:25:57,221 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) [2022-11-23 14:25:57,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:25:57,641 INFO L93 Difference]: Finished difference Result 1914 states and 3116 transitions. [2022-11-23 14:25:57,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:25:57,642 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 [2022-11-23 14:25:57,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:25:57,651 INFO L225 Difference]: With dead ends: 1914 [2022-11-23 14:25:57,651 INFO L226 Difference]: Without dead ends: 1002 [2022-11-23 14:25:57,658 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 [2022-11-23 14:25:57,661 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 209 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-11-23 14:25:57,662 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] [2022-11-23 14:25:57,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-11-23 14:25:57,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 1002. [2022-11-23 14:25:57,725 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) [2022-11-23 14:25:57,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1631 transitions. [2022-11-23 14:25:57,734 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1631 transitions. Word has length 120 [2022-11-23 14:25:57,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:25:57,734 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1631 transitions. [2022-11-23 14:25:57,735 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) [2022-11-23 14:25:57,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1631 transitions. [2022-11-23 14:25:57,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-23 14:25:57,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:25:57,740 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] [2022-11-23 14:25:57,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:25:57,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:25:57,948 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:25:57,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:25:57,949 INFO L85 PathProgramCache]: Analyzing trace with hash -738476540, now seen corresponding path program 1 times [2022-11-23 14:25:57,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:25:57,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915689786] [2022-11-23 14:25:57,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:57,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:25:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:25:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-23 14:25:58,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:25:58,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915689786] [2022-11-23 14:25:58,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915689786] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:25:58,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197133620] [2022-11-23 14:25:58,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:58,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:25:58,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:25:58,088 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:25:58,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:25:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:25:58,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:25:58,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:25:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 14:25:58,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:25:58,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197133620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:25:58,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:25:58,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 14:25:58,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544555051] [2022-11-23 14:25:58,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:25:58,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:25:58,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:25:58,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:25:58,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:25:58,453 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) [2022-11-23 14:25:58,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:25:58,774 INFO L93 Difference]: Finished difference Result 2070 states and 3406 transitions. [2022-11-23 14:25:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:25:58,775 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 [2022-11-23 14:25:58,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:25:58,789 INFO L225 Difference]: With dead ends: 2070 [2022-11-23 14:25:58,789 INFO L226 Difference]: Without dead ends: 1080 [2022-11-23 14:25:58,797 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 [2022-11-23 14:25:58,798 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:25:58,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1308 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:25:58,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-11-23 14:25:58,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1080. [2022-11-23 14:25:58,899 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) [2022-11-23 14:25:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1777 transitions. [2022-11-23 14:25:58,906 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1777 transitions. Word has length 123 [2022-11-23 14:25:58,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:25:58,908 INFO L495 AbstractCegarLoop]: Abstraction has 1080 states and 1777 transitions. [2022-11-23 14:25:58,908 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) [2022-11-23 14:25:58,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1777 transitions. [2022-11-23 14:25:58,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-23 14:25:58,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:25:58,914 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] [2022-11-23 14:25:58,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:25:59,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 14:25:59,122 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:25:59,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:25:59,122 INFO L85 PathProgramCache]: Analyzing trace with hash -2041905646, now seen corresponding path program 1 times [2022-11-23 14:25:59,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:25:59,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639612940] [2022-11-23 14:25:59,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:59,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:25:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:25:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-23 14:25:59,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:25:59,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639612940] [2022-11-23 14:25:59,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639612940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:25:59,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330144007] [2022-11-23 14:25:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:59,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:25:59,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:25:59,355 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:25:59,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:25:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:25:59,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1290 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 14:25:59,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:26:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-23 14:26:00,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:26:53,541 WARN L233 SmtUtils]: Spent 49.28s 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) [2022-11-23 14:26:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-23 14:26:56,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330144007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:26:56,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1893247564] [2022-11-23 14:26:56,559 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2022-11-23 14:26:56,559 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:26:56,564 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:26:56,570 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:26:56,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:26:59,715 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-23 14:27:03,657 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-23 14:27:04,300 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 570 for LOIs [2022-11-23 14:27:30,409 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 66 for LOIs [2022-11-23 14:27:30,423 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 63 for LOIs [2022-11-23 14:27:30,496 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 111 for LOIs [2022-11-23 14:27:31,152 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-23 14:27:31,294 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 437 for LOIs [2022-11-23 14:27:32,082 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 499 for LOIs [2022-11-23 14:27:32,281 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 84 for LOIs [2022-11-23 14:27:32,309 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:27:55,392 WARN L233 SmtUtils]: Spent 7.12s 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) [2022-11-23 14:28:02,891 WARN L233 SmtUtils]: Spent 7.13s 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) [2022-11-23 14:28:11,826 WARN L233 SmtUtils]: Spent 5.37s 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) [2022-11-23 14:28:35,626 WARN L233 SmtUtils]: Spent 5.53s 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) [2022-11-23 14:28:41,699 WARN L233 SmtUtils]: Spent 5.59s 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) [2022-11-23 14:28:47,701 WARN L233 SmtUtils]: Spent 5.51s 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) [2022-11-23 14:29:39,339 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 [2022-11-23 14:29:39,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:29:39,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:29:39,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 16] total 32 [2022-11-23 14:29:39,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544303141] [2022-11-23 14:29:39,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:29:39,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-23 14:29:39,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:39,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-23 14:29:39,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=7027, Unknown=0, NotChecked=0, Total=7832 [2022-11-23 14:29:39,345 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) [2022-11-23 14:29:57,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:57,119 INFO L93 Difference]: Finished difference Result 3455 states and 5745 transitions. [2022-11-23 14:29:57,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-23 14:29:57,120 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 [2022-11-23 14:29:57,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:57,134 INFO L225 Difference]: With dead ends: 3455 [2022-11-23 14:29:57,134 INFO L226 Difference]: Without dead ends: 1904 [2022-11-23 14:29:57,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 290 SyntacticMatches, 18 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7668 ImplicationChecksByTransitivity, 131.1s TimeCoverageRelationStatistics Valid=1859, Invalid=17881, Unknown=0, NotChecked=0, Total=19740 [2022-11-23 14:29:57,154 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 4194 mSDsluCounter, 3579 mSDsCounter, 0 mSdLazyCounter, 15364 mSolverCounterSat, 2319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4239 SdHoareTripleChecker+Valid, 3898 SdHoareTripleChecker+Invalid, 17683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2319 IncrementalHoareTripleChecker+Valid, 15364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:57,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4239 Valid, 3898 Invalid, 17683 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2319 Valid, 15364 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time] [2022-11-23 14:29:57,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2022-11-23 14:29:57,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1761. [2022-11-23 14:29:57,295 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) [2022-11-23 14:29:57,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2772 transitions. [2022-11-23 14:29:57,310 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2772 transitions. Word has length 125 [2022-11-23 14:29:57,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:57,310 INFO L495 AbstractCegarLoop]: Abstraction has 1761 states and 2772 transitions. [2022-11-23 14:29:57,311 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) [2022-11-23 14:29:57,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2772 transitions. [2022-11-23 14:29:57,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 14:29:57,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:57,318 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] [2022-11-23 14:29:57,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:29:57,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:57,526 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:29:57,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:57,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1346410445, now seen corresponding path program 1 times [2022-11-23 14:29:57,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:57,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389545090] [2022-11-23 14:29:57,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:57,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-23 14:29:57,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:57,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389545090] [2022-11-23 14:29:57,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389545090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:29:57,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345205386] [2022-11-23 14:29:57,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:57,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:57,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:29:57,787 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:29:57,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:29:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:58,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:29:58,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-23 14:29:58,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:29:58,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345205386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:29:58,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:29:58,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-23 14:29:58,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660964493] [2022-11-23 14:29:58,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:29:58,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:29:58,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:58,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:29:58,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:29:58,284 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) [2022-11-23 14:29:59,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:59,362 INFO L93 Difference]: Finished difference Result 3327 states and 5238 transitions. [2022-11-23 14:29:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:29:59,362 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 [2022-11-23 14:29:59,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:59,375 INFO L225 Difference]: With dead ends: 3327 [2022-11-23 14:29:59,375 INFO L226 Difference]: Without dead ends: 1579 [2022-11-23 14:29:59,384 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 [2022-11-23 14:29:59,387 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 341 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 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 [2022-11-23 14:29:59,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 1986 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:29:59,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2022-11-23 14:29:59,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1555. [2022-11-23 14:29:59,498 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) [2022-11-23 14:29:59,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2446 transitions. [2022-11-23 14:29:59,511 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2446 transitions. Word has length 130 [2022-11-23 14:29:59,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:59,511 INFO L495 AbstractCegarLoop]: Abstraction has 1555 states and 2446 transitions. [2022-11-23 14:29:59,512 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) [2022-11-23 14:29:59,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2446 transitions. [2022-11-23 14:29:59,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-23 14:29:59,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:59,521 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] [2022-11-23 14:29:59,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:29:59,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:59,734 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:29:59,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:59,735 INFO L85 PathProgramCache]: Analyzing trace with hash -386033699, now seen corresponding path program 1 times [2022-11-23 14:29:59,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:59,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730313294] [2022-11-23 14:29:59,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:59,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:30:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-23 14:30:00,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:30:00,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730313294] [2022-11-23 14:30:00,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730313294] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:30:00,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545314776] [2022-11-23 14:30:00,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:30:00,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:30:00,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:30:00,593 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:30:00,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:30:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:30:01,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:30:01,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:30:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 63 proven. 10 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-23 14:30:01,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:30:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-23 14:30:01,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545314776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:30:01,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [623216371] [2022-11-23 14:30:01,746 INFO L159 IcfgInterpreter]: Started Sifa with 113 locations of interest [2022-11-23 14:30:01,747 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:30:01,747 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:30:01,747 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:30:01,748 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:30:06,451 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2022-11-23 14:30:15,677 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 45 for LOIs [2022-11-23 14:30:16,054 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 21 for LOIs [2022-11-23 14:30:16,074 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 84 for LOIs [2022-11-23 14:30:16,205 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 28 for LOIs [2022-11-23 14:30:16,266 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 55 for LOIs [2022-11-23 14:30:16,287 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 57 for LOIs [2022-11-23 14:30:16,308 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 21 for LOIs [2022-11-23 14:30:16,310 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-23 14:30:20,039 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-23 14:30:20,627 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 34 for LOIs [2022-11-23 14:30:20,673 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 32 for LOIs [2022-11-23 14:30:20,676 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-23 14:30:20,828 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:30:43,092 WARN L233 SmtUtils]: Spent 7.09s 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) [2022-11-23 14:30:50,531 WARN L233 SmtUtils]: Spent 7.09s 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) [2022-11-23 14:30:59,415 WARN L233 SmtUtils]: Spent 5.36s 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) [2022-11-23 14:31:12,120 WARN L233 SmtUtils]: Spent 6.39s 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) [2022-11-23 14:31:41,134 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 [2022-11-23 14:31:41,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:31:41,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:31:41,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-11-23 14:31:41,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107685257] [2022-11-23 14:31:41,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:31:41,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 14:31:41,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:31:41,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 14:31:41,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1064, Invalid=10492, Unknown=0, NotChecked=0, Total=11556 [2022-11-23 14:31:41,140 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) [2022-11-23 14:31:59,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:31:59,833 INFO L93 Difference]: Finished difference Result 5716 states and 9215 transitions. [2022-11-23 14:31:59,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-23 14:31:59,834 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 [2022-11-23 14:31:59,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:31:59,864 INFO L225 Difference]: With dead ends: 5716 [2022-11-23 14:31:59,865 INFO L226 Difference]: Without dead ends: 4123 [2022-11-23 14:31:59,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 497 SyntacticMatches, 11 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11391 ImplicationChecksByTransitivity, 82.7s TimeCoverageRelationStatistics Valid=2272, Invalid=25784, Unknown=0, NotChecked=0, Total=28056 [2022-11-23 14:31:59,888 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 4571 mSDsluCounter, 5568 mSDsCounter, 0 mSdLazyCounter, 20784 mSolverCounterSat, 3394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4592 SdHoareTripleChecker+Valid, 6140 SdHoareTripleChecker+Invalid, 24178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3394 IncrementalHoareTripleChecker+Valid, 20784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:31:59,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4592 Valid, 6140 Invalid, 24178 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3394 Valid, 20784 Invalid, 0 Unknown, 0 Unchecked, 15.6s Time] [2022-11-23 14:31:59,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2022-11-23 14:32:00,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3779. [2022-11-23 14:32:00,255 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) [2022-11-23 14:32:00,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3779 states to 3779 states and 5782 transitions. [2022-11-23 14:32:00,281 INFO L78 Accepts]: Start accepts. Automaton has 3779 states and 5782 transitions. Word has length 188 [2022-11-23 14:32:00,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:00,282 INFO L495 AbstractCegarLoop]: Abstraction has 3779 states and 5782 transitions. [2022-11-23 14:32:00,283 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) [2022-11-23 14:32:00,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3779 states and 5782 transitions. [2022-11-23 14:32:00,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-11-23 14:32:00,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:00,348 INFO L195 NwaCegarLoop]: trace histogram [14, 11, 11, 11, 11, 6, 6, 6, 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, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2022-11-23 14:32:00,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:32:00,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 14:32:00,560 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:32:00,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:00,562 INFO L85 PathProgramCache]: Analyzing trace with hash 208810195, now seen corresponding path program 1 times [2022-11-23 14:32:00,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:00,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881802946] [2022-11-23 14:32:00,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:00,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 40 proven. 12 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2022-11-23 14:32:01,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:01,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881802946] [2022-11-23 14:32:01,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881802946] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:32:01,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007500964] [2022-11-23 14:32:01,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:01,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:01,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:01,148 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:01,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:32:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:01,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 2984 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:32:01,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2022-11-23 14:32:01,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:32:01,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007500964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:32:01,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:32:01,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 14:32:01,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655179838] [2022-11-23 14:32:01,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:32:01,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:32:01,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:01,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:32:01,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:32:01,833 INFO L87 Difference]: Start difference. First operand 3779 states and 5782 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2022-11-23 14:32:02,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:02,307 INFO L93 Difference]: Finished difference Result 6256 states and 9611 transitions. [2022-11-23 14:32:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:32:02,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 328 [2022-11-23 14:32:02,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:02,333 INFO L225 Difference]: With dead ends: 6256 [2022-11-23 14:32:02,333 INFO L226 Difference]: Without dead ends: 3849 [2022-11-23 14:32:02,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:32:02,348 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 401 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:02,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 977 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:32:02,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3849 states. [2022-11-23 14:32:02,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3849 to 3827. [2022-11-23 14:32:02,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 2807 states have (on average 1.5258282864267902) internal successors, (4283), 2887 states have internal predecessors, (4283), 714 states have call successors, (714), 314 states have call predecessors, (714), 305 states have return successors, (828), 685 states have call predecessors, (828), 706 states have call successors, (828) [2022-11-23 14:32:02,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 5825 transitions. [2022-11-23 14:32:02,798 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 5825 transitions. Word has length 328 [2022-11-23 14:32:02,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:02,801 INFO L495 AbstractCegarLoop]: Abstraction has 3827 states and 5825 transitions. [2022-11-23 14:32:02,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2022-11-23 14:32:02,802 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 5825 transitions. [2022-11-23 14:32:02,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-11-23 14:32:02,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:02,832 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] [2022-11-23 14:32:02,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:32:03,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 14:32:03,042 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:32:03,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:03,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1757768388, now seen corresponding path program 1 times [2022-11-23 14:32:03,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:03,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80664108] [2022-11-23 14:32:03,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:03,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 23 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-11-23 14:32:03,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:03,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80664108] [2022-11-23 14:32:03,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80664108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:32:03,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026386382] [2022-11-23 14:32:03,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:03,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:03,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:03,515 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:03,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:32:03,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:03,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 2062 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:32:03,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 97 proven. 18 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-11-23 14:32:04,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:32:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 23 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-11-23 14:32:04,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026386382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:32:04,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [58043567] [2022-11-23 14:32:04,741 INFO L159 IcfgInterpreter]: Started Sifa with 113 locations of interest [2022-11-23 14:32:04,741 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:32:04,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:32:04,742 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:32:04,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:32:10,201 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2022-11-23 14:32:19,327 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 45 for LOIs [2022-11-23 14:32:19,690 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 21 for LOIs [2022-11-23 14:32:19,711 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 84 for LOIs [2022-11-23 14:32:19,843 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 28 for LOIs [2022-11-23 14:32:19,903 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 55 for LOIs [2022-11-23 14:32:19,924 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 57 for LOIs [2022-11-23 14:32:19,942 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 21 for LOIs [2022-11-23 14:32:19,944 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-23 14:32:23,610 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-23 14:32:24,223 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 34 for LOIs [2022-11-23 14:32:24,285 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 32 for LOIs [2022-11-23 14:32:24,293 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-23 14:32:24,451 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:32:46,837 WARN L233 SmtUtils]: Spent 7.10s 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) [2022-11-23 14:32:54,240 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) [2022-11-23 14:33:03,189 WARN L233 SmtUtils]: Spent 5.40s 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) [2022-11-23 14:33:16,038 WARN L233 SmtUtils]: Spent 6.43s 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) [2022-11-23 14:33:51,613 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '70940#(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 [2022-11-23 14:33:51,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:33:51,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:33:51,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-11-23 14:33:51,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024912723] [2022-11-23 14:33:51,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:33:51,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 14:33:51,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:51,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 14:33:51,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1147, Invalid=10409, Unknown=0, NotChecked=0, Total=11556 [2022-11-23 14:33:51,617 INFO L87 Difference]: Start difference. First operand 3827 states and 5825 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) [2022-11-23 14:33:58,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:58,763 INFO L93 Difference]: Finished difference Result 6983 states and 10593 transitions. [2022-11-23 14:33:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 14:33:58,764 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 [2022-11-23 14:33:58,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:58,796 INFO L225 Difference]: With dead ends: 6983 [2022-11-23 14:33:58,796 INFO L226 Difference]: Without dead ends: 4761 [2022-11-23 14:33:58,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 637 SyntacticMatches, 18 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6809 ImplicationChecksByTransitivity, 88.7s TimeCoverageRelationStatistics Valid=1647, Invalid=14865, Unknown=0, NotChecked=0, Total=16512 [2022-11-23 14:33:58,814 INFO L413 NwaCegarLoop]: 1011 mSDtfsCounter, 1903 mSDsluCounter, 8387 mSDsCounter, 0 mSdLazyCounter, 7275 mSolverCounterSat, 1072 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1924 SdHoareTripleChecker+Valid, 9398 SdHoareTripleChecker+Invalid, 8347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1072 IncrementalHoareTripleChecker+Valid, 7275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:58,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1924 Valid, 9398 Invalid, 8347 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1072 Valid, 7275 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-23 14:33:58,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4761 states. [2022-11-23 14:33:59,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4761 to 4637. [2022-11-23 14:33:59,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 3380 states have (on average 1.4730769230769232) internal successors, (4979), 3463 states have internal predecessors, (4979), 863 states have call successors, (863), 404 states have call predecessors, (863), 393 states have return successors, (1050), 829 states have call predecessors, (1050), 853 states have call successors, (1050) [2022-11-23 14:33:59,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 6892 transitions. [2022-11-23 14:33:59,312 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 6892 transitions. Word has length 246 [2022-11-23 14:33:59,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:59,313 INFO L495 AbstractCegarLoop]: Abstraction has 4637 states and 6892 transitions. [2022-11-23 14:33:59,313 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) [2022-11-23 14:33:59,313 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 6892 transitions. [2022-11-23 14:33:59,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-11-23 14:33:59,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:59,435 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 6, 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, 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] [2022-11-23 14:33:59,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:33:59,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 14:33:59,636 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:33:59,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:59,637 INFO L85 PathProgramCache]: Analyzing trace with hash 332450385, now seen corresponding path program 1 times [2022-11-23 14:33:59,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:59,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758181278] [2022-11-23 14:33:59,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:59,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-11-23 14:34:00,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:00,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758181278] [2022-11-23 14:34:00,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758181278] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:34:00,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879959993] [2022-11-23 14:34:00,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:00,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:34:00,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:34:00,152 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:34:00,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:34:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:00,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 2062 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:34:00,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:34:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 101 proven. 18 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2022-11-23 14:34:00,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:34:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-11-23 14:34:01,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879959993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:34:01,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2128353102] [2022-11-23 14:34:01,433 INFO L159 IcfgInterpreter]: Started Sifa with 112 locations of interest [2022-11-23 14:34:01,433 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:34:01,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:34:01,435 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:34:01,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:34:07,024 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2022-11-23 14:34:16,121 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 45 for LOIs [2022-11-23 14:34:16,458 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 21 for LOIs [2022-11-23 14:34:16,479 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 84 for LOIs [2022-11-23 14:34:16,617 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 28 for LOIs [2022-11-23 14:34:16,677 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 55 for LOIs [2022-11-23 14:34:16,691 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 57 for LOIs [2022-11-23 14:34:16,705 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 21 for LOIs [2022-11-23 14:34:16,706 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-23 14:34:20,343 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-23 14:34:20,996 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 34 for LOIs [2022-11-23 14:34:21,058 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 32 for LOIs [2022-11-23 14:34:21,060 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-23 14:34:21,206 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:34:45,172 WARN L233 SmtUtils]: Spent 7.51s 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) [2022-11-23 14:34:53,154 WARN L233 SmtUtils]: Spent 7.60s 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) [2022-11-23 14:35:02,647 WARN L233 SmtUtils]: Spent 5.75s 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) [2022-11-23 14:35:16,396 WARN L233 SmtUtils]: Spent 6.84s 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) [2022-11-23 14:35:55,411 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '88751#(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 [2022-11-23 14:35:55,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:35:55,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:35:55,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-11-23 14:35:55,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087980725] [2022-11-23 14:35:55,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:35:55,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 14:35:55,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:55,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 14:35:55,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1147, Invalid=10409, Unknown=0, NotChecked=0, Total=11556 [2022-11-23 14:35:55,416 INFO L87 Difference]: Start difference. First operand 4637 states and 6892 transitions. Second operand has 25 states, 19 states have (on average 9.947368421052632) internal successors, (189), 22 states have internal predecessors, (189), 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) [2022-11-23 14:36:02,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:02,341 INFO L93 Difference]: Finished difference Result 7911 states and 11749 transitions. [2022-11-23 14:36:02,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 14:36:02,342 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 9.947368421052632) internal successors, (189), 22 states have internal predecessors, (189), 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 249 [2022-11-23 14:36:02,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:02,375 INFO L225 Difference]: With dead ends: 7911 [2022-11-23 14:36:02,375 INFO L226 Difference]: Without dead ends: 5213 [2022-11-23 14:36:02,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 791 GetRequests, 641 SyntacticMatches, 23 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7176 ImplicationChecksByTransitivity, 95.9s TimeCoverageRelationStatistics Valid=1647, Invalid=14865, Unknown=0, NotChecked=0, Total=16512 [2022-11-23 14:36:02,393 INFO L413 NwaCegarLoop]: 1001 mSDtfsCounter, 2491 mSDsluCounter, 8511 mSDsCounter, 0 mSdLazyCounter, 6307 mSolverCounterSat, 1453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2512 SdHoareTripleChecker+Valid, 9512 SdHoareTripleChecker+Invalid, 7760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1453 IncrementalHoareTripleChecker+Valid, 6307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:02,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2512 Valid, 9512 Invalid, 7760 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1453 Valid, 6307 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-23 14:36:02,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5213 states. [2022-11-23 14:36:02,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5213 to 5089. [2022-11-23 14:36:02,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5089 states, 3708 states have (on average 1.4403991370010787) internal successors, (5341), 3791 states have internal predecessors, (5341), 939 states have call successors, (939), 452 states have call predecessors, (939), 441 states have return successors, (1182), 905 states have call predecessors, (1182), 929 states have call successors, (1182) [2022-11-23 14:36:02,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5089 states to 5089 states and 7462 transitions. [2022-11-23 14:36:02,924 INFO L78 Accepts]: Start accepts. Automaton has 5089 states and 7462 transitions. Word has length 249 [2022-11-23 14:36:02,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:02,925 INFO L495 AbstractCegarLoop]: Abstraction has 5089 states and 7462 transitions. [2022-11-23 14:36:02,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 9.947368421052632) internal successors, (189), 22 states have internal predecessors, (189), 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) [2022-11-23 14:36:02,926 INFO L276 IsEmpty]: Start isEmpty. Operand 5089 states and 7462 transitions. [2022-11-23 14:36:02,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2022-11-23 14:36:02,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:02,990 INFO L195 NwaCegarLoop]: trace histogram [18, 14, 14, 14, 14, 6, 6, 6, 6, 6, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:03,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 14:36:03,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:36:03,200 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:36:03,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:03,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1948652351, now seen corresponding path program 1 times [2022-11-23 14:36:03,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:36:03,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216846248] [2022-11-23 14:36:03,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:03,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:36:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 53 proven. 24 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2022-11-23 14:36:03,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:36:03,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216846248] [2022-11-23 14:36:03,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216846248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:36:03,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092261106] [2022-11-23 14:36:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:03,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:36:03,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:36:03,829 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:36:03,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5271d22-af3b-438c-ac7c-29e004acfe92/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 14:36:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:04,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 3423 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:36:04,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:36:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 152 proven. 48 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2022-11-23 14:36:05,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:36:05,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 49 proven. 31 refuted. 0 times theorem prover too weak. 967 trivial. 0 not checked. [2022-11-23 14:36:05,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092261106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:36:05,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [586658632] [2022-11-23 14:36:05,789 INFO L159 IcfgInterpreter]: Started Sifa with 154 locations of interest [2022-11-23 14:36:05,789 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:36:05,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:36:05,790 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:36:05,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:36:13,480 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 555 for LOIs [2022-11-23 14:36:16,798 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 584 for LOIs [2022-11-23 14:36:24,416 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 32 for LOIs [2022-11-23 14:36:24,750 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 42 for LOIs [2022-11-23 14:36:24,823 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 80 for LOIs [2022-11-23 14:36:24,998 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 45 for LOIs [2022-11-23 14:36:25,089 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 21 for LOIs [2022-11-23 14:36:25,096 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 64 for LOIs [2022-11-23 14:36:25,109 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 42 for LOIs [2022-11-23 14:36:25,113 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-23 14:36:28,793 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 403 for LOIs [2022-11-23 14:36:28,854 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 36 for LOIs [2022-11-23 14:36:28,925 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 57 for LOIs [2022-11-23 14:36:28,934 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 508 for LOIs [2022-11-23 14:36:31,327 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 778 for LOIs [2022-11-23 14:36:40,432 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 631 for LOIs [2022-11-23 14:36:40,919 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:36:59,708 WARN L233 SmtUtils]: Spent 9.98s 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) [2022-11-23 14:37:10,952 WARN L233 SmtUtils]: Spent 10.82s 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) [2022-11-23 14:37:19,097 WARN L233 SmtUtils]: Spent 7.79s 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) [2022-11-23 14:37:27,012 WARN L233 SmtUtils]: Spent 7.52s 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) [2022-11-23 14:37:36,865 WARN L233 SmtUtils]: Spent 9.33s 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) [2022-11-23 14:37:55,877 WARN L233 SmtUtils]: Spent 18.23s on a formula simplification. DAG size of input: 843 DAG size of output: 750 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)