./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh --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 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e --- 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-2329fc7 [2022-12-14 13:40:04,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:40:04,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:40:04,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:40:04,760 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:40:04,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:40:04,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:40:04,762 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:40:04,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:40:04,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:40:04,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:40:04,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:40:04,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:40:04,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:40:04,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:40:04,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:40:04,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:40:04,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:40:04,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:40:04,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:40:04,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:40:04,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:40:04,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:40:04,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:40:04,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:40:04,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:40:04,780 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:40:04,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:40:04,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:40:04,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:40:04,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:40:04,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:40:04,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:40:04,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:40:04,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:40:04,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:40:04,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:40:04,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:40:04,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:40:04,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:40:04,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:40:04,790 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:40:04,817 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:40:04,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:40:04,818 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:40:04,818 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:40:04,819 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:40:04,819 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:40:04,819 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:40:04,819 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:40:04,819 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:40:04,820 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:40:04,820 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:40:04,820 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:40:04,820 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:40:04,820 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:40:04,820 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:40:04,820 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:40:04,821 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:40:04,821 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:40:04,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:40:04,822 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:40:04,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:40:04,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:40:04,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:40:04,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:40:04,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:40:04,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:40:04,823 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:40:04,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:40:04,823 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:40:04,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:40:04,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:40:04,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:40:04,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:40:04,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:40:04,824 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:40:04,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:40:04,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:40:04,824 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:40:04,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:40:04,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:40:04,825 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:40:04,825 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_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e [2022-12-14 13:40:05,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:40:05,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:40:05,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:40:05,039 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:40:05,039 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:40:05,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2022-12-14 13:40:07,693 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:40:07,948 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:40:07,949 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2022-12-14 13:40:07,964 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/data/55d00a4a9/f23ec25ceaae432093b1975f2f7df56a/FLAGa5cefec48 [2022-12-14 13:40:08,251 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/data/55d00a4a9/f23ec25ceaae432093b1975f2f7df56a [2022-12-14 13:40:08,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:40:08,254 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:40:08,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:40:08,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:40:08,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:40:08,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:40:08" (1/1) ... [2022-12-14 13:40:08,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1212b81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:40:08, skipping insertion in model container [2022-12-14 13:40:08,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:40:08" (1/1) ... [2022-12-14 13:40:08,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:40:08,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:40:08,468 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_09827307-e6b4-41ca-a4cf-6b41dba90fd5/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2022-12-14 13:40:08,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:40:08,718 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:40:08,729 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_09827307-e6b4-41ca-a4cf-6b41dba90fd5/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2022-12-14 13:40:08,795 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:40:08,816 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:40:08,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:40:08 WrapperNode [2022-12-14 13:40:08,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:40:08,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:40:08,818 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:40:08,818 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:40:08,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:40:08" (1/1) ... [2022-12-14 13:40:08,843 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:40:08" (1/1) ... [2022-12-14 13:40:08,870 INFO L138 Inliner]: procedures = 92, calls = 335, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 1095 [2022-12-14 13:40:08,871 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:40:08,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:40:08,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:40:08,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:40:08,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:40:08" (1/1) ... [2022-12-14 13:40:08,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:40:08" (1/1) ... [2022-12-14 13:40:08,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:40:08" (1/1) ... [2022-12-14 13:40:08,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:40:08" (1/1) ... [2022-12-14 13:40:08,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:40:08" (1/1) ... [2022-12-14 13:40:08,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:40:08" (1/1) ... [2022-12-14 13:40:08,916 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:40:08" (1/1) ... [2022-12-14 13:40:08,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:40:08" (1/1) ... [2022-12-14 13:40:08,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:40:08,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:40:08,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:40:08,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:40:08,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:40:08" (1/1) ... [2022-12-14 13:40:08,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:40:08,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:40:08,953 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:40:08,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:40:08,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:40:08,980 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 13:40:08,981 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 13:40:08,981 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 13:40:08,981 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 13:40:08,981 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 13:40:08,981 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 13:40:08,981 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 13:40:08,981 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 13:40:08,981 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 13:40:08,981 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 13:40:08,981 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 13:40:08,981 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 13:40:08,981 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 13:40:08,981 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 13:40:08,981 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 13:40:08,982 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 13:40:08,982 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 13:40:08,982 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 13:40:08,982 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 13:40:08,982 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 13:40:08,982 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 13:40:08,982 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 13:40:08,982 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 13:40:08,982 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 13:40:08,982 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 13:40:08,982 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 13:40:08,983 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 13:40:08,983 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 13:40:08,983 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-12-14 13:40:08,983 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-12-14 13:40:08,983 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 13:40:08,983 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 13:40:08,983 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 13:40:08,983 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 13:40:08,984 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 13:40:08,984 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 13:40:08,984 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 13:40:08,984 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 13:40:08,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:40:08,984 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 13:40:08,984 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 13:40:08,984 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 13:40:08,984 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 13:40:08,985 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 13:40:08,985 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 13:40:08,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:40:08,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:40:08,985 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 13:40:08,985 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 13:40:09,106 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:40:09,108 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:40:09,837 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:40:10,456 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:40:10,456 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 13:40:10,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:40:10 BoogieIcfgContainer [2022-12-14 13:40:10,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:40:10,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:40:10,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:40:10,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:40:10,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:40:08" (1/3) ... [2022-12-14 13:40:10,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0cb052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:40:10, skipping insertion in model container [2022-12-14 13:40:10,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:40:08" (2/3) ... [2022-12-14 13:40:10,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0cb052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:40:10, skipping insertion in model container [2022-12-14 13:40:10,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:40:10" (3/3) ... [2022-12-14 13:40:10,468 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product27.cil.c [2022-12-14 13:40:10,487 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:40:10,487 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:40:10,540 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:40:10,547 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;@7beb2aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:40:10,547 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:40:10,552 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) [2022-12-14 13:40:10,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 13:40:10,564 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:40:10,564 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] [2022-12-14 13:40:10,565 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:40:10,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:40:10,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1095055066, now seen corresponding path program 1 times [2022-12-14 13:40:10,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:40:10,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751951186] [2022-12-14 13:40:10,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:40:10,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:40:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:40:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:40:10,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:40:10,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751951186] [2022-12-14 13:40:10,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751951186] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:40:10,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:40:10,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:40:10,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478670289] [2022-12-14 13:40:10,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:40:10,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:40:10,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:40:10,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:40:10,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:40:11,001 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) [2022-12-14 13:40:11,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:40:11,613 INFO L93 Difference]: Finished difference Result 1037 states and 1657 transitions. [2022-12-14 13:40:11,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:40:11,616 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 [2022-12-14 13:40:11,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:40:11,634 INFO L225 Difference]: With dead ends: 1037 [2022-12-14 13:40:11,634 INFO L226 Difference]: Without dead ends: 685 [2022-12-14 13:40:11,642 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 [2022-12-14 13:40:11,646 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 530 mSDsluCounter, 1644 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 2306 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:40:11,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 2306 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:40:11,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-12-14 13:40:11,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 679. [2022-12-14 13:40:11,751 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) [2022-12-14 13:40:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1076 transitions. [2022-12-14 13:40:11,763 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1076 transitions. Word has length 73 [2022-12-14 13:40:11,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:40:11,764 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 1076 transitions. [2022-12-14 13:40:11,764 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) [2022-12-14 13:40:11,764 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1076 transitions. [2022-12-14 13:40:11,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 13:40:11,772 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:40:11,772 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] [2022-12-14 13:40:11,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:40:11,772 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:40:11,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:40:11,773 INFO L85 PathProgramCache]: Analyzing trace with hash 2114915728, now seen corresponding path program 1 times [2022-12-14 13:40:11,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:40:11,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87707804] [2022-12-14 13:40:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:40:11,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:40:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:40:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:40:12,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:40:12,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87707804] [2022-12-14 13:40:12,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87707804] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:40:12,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:40:12,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:40:12,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800197966] [2022-12-14 13:40:12,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:40:12,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:40:12,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:40:12,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:40:12,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:40:12,003 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) [2022-12-14 13:40:12,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:40:12,583 INFO L93 Difference]: Finished difference Result 776 states and 1223 transitions. [2022-12-14 13:40:12,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:40:12,584 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 [2022-12-14 13:40:12,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:40:12,592 INFO L225 Difference]: With dead ends: 776 [2022-12-14 13:40:12,592 INFO L226 Difference]: Without dead ends: 774 [2022-12-14 13:40:12,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:40:12,595 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 637 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:40:12,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 1626 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:40:12,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-12-14 13:40:12,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 764. [2022-12-14 13:40:12,652 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) [2022-12-14 13:40:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1189 transitions. [2022-12-14 13:40:12,663 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1189 transitions. Word has length 77 [2022-12-14 13:40:12,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:40:12,663 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 1189 transitions. [2022-12-14 13:40:12,664 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) [2022-12-14 13:40:12,664 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1189 transitions. [2022-12-14 13:40:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 13:40:12,669 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:40:12,670 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] [2022-12-14 13:40:12,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 13:40:12,670 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:40:12,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:40:12,670 INFO L85 PathProgramCache]: Analyzing trace with hash -246698311, now seen corresponding path program 1 times [2022-12-14 13:40:12,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:40:12,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452462634] [2022-12-14 13:40:12,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:40:12,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:40:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:40:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 13:40:12,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:40:12,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452462634] [2022-12-14 13:40:12,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452462634] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:40:12,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:40:12,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:40:12,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394043240] [2022-12-14 13:40:12,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:40:12,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:40:12,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:40:12,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:40:12,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:40:12,849 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) [2022-12-14 13:40:13,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:40:13,016 INFO L93 Difference]: Finished difference Result 1554 states and 2447 transitions. [2022-12-14 13:40:13,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:40:13,017 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 [2022-12-14 13:40:13,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:40:13,022 INFO L225 Difference]: With dead ends: 1554 [2022-12-14 13:40:13,023 INFO L226 Difference]: Without dead ends: 802 [2022-12-14 13:40:13,029 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 [2022-12-14 13:40:13,030 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, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:40:13,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1534 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:40:13,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-12-14 13:40:13,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 768. [2022-12-14 13:40:13,071 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) [2022-12-14 13:40:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1193 transitions. [2022-12-14 13:40:13,078 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1193 transitions. Word has length 108 [2022-12-14 13:40:13,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:40:13,079 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1193 transitions. [2022-12-14 13:40:13,079 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) [2022-12-14 13:40:13,079 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1193 transitions. [2022-12-14 13:40:13,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 13:40:13,082 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:40:13,083 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] [2022-12-14 13:40:13,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 13:40:13,083 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:40:13,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:40:13,083 INFO L85 PathProgramCache]: Analyzing trace with hash 838550472, now seen corresponding path program 1 times [2022-12-14 13:40:13,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:40:13,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701869047] [2022-12-14 13:40:13,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:40:13,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:40:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:40:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 13:40:13,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:40:13,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701869047] [2022-12-14 13:40:13,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701869047] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:40:13,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335180241] [2022-12-14 13:40:13,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:40:13,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:40:13,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:40:13,323 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:40:13,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:40:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:40:13,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:40:13,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:40:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 13:40:13,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:40:13,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335180241] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:40:13,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:40:13,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-14 13:40:13,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335910888] [2022-12-14 13:40:13,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:40:13,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:40:13,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:40:13,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:40:13,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:40:13,599 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) [2022-12-14 13:40:13,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:40:13,832 INFO L93 Difference]: Finished difference Result 1602 states and 2536 transitions. [2022-12-14 13:40:13,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:40:13,833 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 [2022-12-14 13:40:13,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:40:13,838 INFO L225 Difference]: With dead ends: 1602 [2022-12-14 13:40:13,838 INFO L226 Difference]: Without dead ends: 846 [2022-12-14 13:40:13,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:40:13,845 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 213 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:40:13,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1308 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:40:13,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-12-14 13:40:13,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 846. [2022-12-14 13:40:13,887 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) [2022-12-14 13:40:13,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1339 transitions. [2022-12-14 13:40:13,894 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1339 transitions. Word has length 111 [2022-12-14 13:40:13,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:40:13,895 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1339 transitions. [2022-12-14 13:40:13,895 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) [2022-12-14 13:40:13,895 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1339 transitions. [2022-12-14 13:40:13,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 13:40:13,899 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:40:13,899 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] [2022-12-14 13:40:13,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:40:14,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:40:14,100 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:40:14,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:40:14,101 INFO L85 PathProgramCache]: Analyzing trace with hash 791522983, now seen corresponding path program 1 times [2022-12-14 13:40:14,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:40:14,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509134134] [2022-12-14 13:40:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:40:14,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:40:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:40:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 13:40:14,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:40:14,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509134134] [2022-12-14 13:40:14,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509134134] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:40:14,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977753151] [2022-12-14 13:40:14,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:40:14,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:40:14,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:40:14,252 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:40:14,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:40:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:40:14,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:40:14,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:40:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 13:40:14,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:40:14,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977753151] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:40:14,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:40:14,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 13:40:14,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601277721] [2022-12-14 13:40:14,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:40:14,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:40:14,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:40:14,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:40:14,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:40:14,478 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) [2022-12-14 13:40:14,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:40:14,700 INFO L93 Difference]: Finished difference Result 1758 states and 2826 transitions. [2022-12-14 13:40:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:40:14,701 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 [2022-12-14 13:40:14,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:40:14,704 INFO L225 Difference]: With dead ends: 1758 [2022-12-14 13:40:14,705 INFO L226 Difference]: Without dead ends: 924 [2022-12-14 13:40:14,708 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 [2022-12-14 13:40:14,709 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 211 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:40:14,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1308 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:40:14,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-12-14 13:40:14,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 924. [2022-12-14 13:40:14,734 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) [2022-12-14 13:40:14,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1485 transitions. [2022-12-14 13:40:14,739 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1485 transitions. Word has length 116 [2022-12-14 13:40:14,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:40:14,739 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1485 transitions. [2022-12-14 13:40:14,739 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) [2022-12-14 13:40:14,739 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1485 transitions. [2022-12-14 13:40:14,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-14 13:40:14,742 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:40:14,742 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] [2022-12-14 13:40:14,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:40:14,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:40:14,942 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:40:14,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:40:14,943 INFO L85 PathProgramCache]: Analyzing trace with hash 905065111, now seen corresponding path program 1 times [2022-12-14 13:40:14,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:40:14,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541448028] [2022-12-14 13:40:14,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:40:14,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:40:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:40:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 13:40:15,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:40:15,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541448028] [2022-12-14 13:40:15,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541448028] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:40:15,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647928572] [2022-12-14 13:40:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:40:15,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:40:15,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:40:15,067 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:40:15,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:40:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:40:15,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 1291 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:40:15,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:40:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 13:40:15,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:40:15,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647928572] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:40:15,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:40:15,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 13:40:15,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597445908] [2022-12-14 13:40:15,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:40:15,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:40:15,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:40:15,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:40:15,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:40:15,313 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) [2022-12-14 13:40:15,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:40:15,545 INFO L93 Difference]: Finished difference Result 1914 states and 3116 transitions. [2022-12-14 13:40:15,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:40:15,546 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 [2022-12-14 13:40:15,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:40:15,555 INFO L225 Difference]: With dead ends: 1914 [2022-12-14 13:40:15,555 INFO L226 Difference]: Without dead ends: 1002 [2022-12-14 13:40:15,562 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 [2022-12-14 13:40:15,563 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 209 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:40:15,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1308 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:40:15,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-12-14 13:40:15,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 1002. [2022-12-14 13:40:15,604 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) [2022-12-14 13:40:15,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1631 transitions. [2022-12-14 13:40:15,608 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1631 transitions. Word has length 120 [2022-12-14 13:40:15,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:40:15,609 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1631 transitions. [2022-12-14 13:40:15,609 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) [2022-12-14 13:40:15,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1631 transitions. [2022-12-14 13:40:15,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 13:40:15,611 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:40:15,612 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] [2022-12-14 13:40:15,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:40:15,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 13:40:15,812 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:40:15,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:40:15,813 INFO L85 PathProgramCache]: Analyzing trace with hash -919495064, now seen corresponding path program 1 times [2022-12-14 13:40:15,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:40:15,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182323105] [2022-12-14 13:40:15,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:40:15,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:40:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:40:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-14 13:40:15,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:40:15,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182323105] [2022-12-14 13:40:15,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182323105] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:40:15,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54720016] [2022-12-14 13:40:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:40:15,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:40:15,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:40:15,909 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:40:15,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:40:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:40:16,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:40:16,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:40:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 13:40:16,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:40:16,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54720016] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:40:16,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:40:16,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 13:40:16,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507477089] [2022-12-14 13:40:16,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:40:16,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:40:16,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:40:16,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:40:16,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:40:16,142 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) [2022-12-14 13:40:16,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:40:16,379 INFO L93 Difference]: Finished difference Result 2070 states and 3406 transitions. [2022-12-14 13:40:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:40:16,380 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 [2022-12-14 13:40:16,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:40:16,385 INFO L225 Difference]: With dead ends: 2070 [2022-12-14 13:40:16,385 INFO L226 Difference]: Without dead ends: 1080 [2022-12-14 13:40:16,388 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 [2022-12-14 13:40:16,389 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 207 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-12-14 13:40:16,389 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] [2022-12-14 13:40:16,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-12-14 13:40:16,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1080. [2022-12-14 13:40:16,436 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) [2022-12-14 13:40:16,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1777 transitions. [2022-12-14 13:40:16,444 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1777 transitions. Word has length 123 [2022-12-14 13:40:16,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:40:16,444 INFO L495 AbstractCegarLoop]: Abstraction has 1080 states and 1777 transitions. [2022-12-14 13:40:16,445 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) [2022-12-14 13:40:16,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1777 transitions. [2022-12-14 13:40:16,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 13:40:16,451 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:40:16,451 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] [2022-12-14 13:40:16,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:40:16,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 13:40:16,653 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:40:16,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:40:16,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1931352138, now seen corresponding path program 1 times [2022-12-14 13:40:16,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:40:16,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762155377] [2022-12-14 13:40:16,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:40:16,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:40:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:40:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 13:40:16,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:40:16,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762155377] [2022-12-14 13:40:16,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762155377] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:40:16,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112003980] [2022-12-14 13:40:16,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:40:16,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:40:16,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:40:16,918 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:40:16,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:40:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:40:17,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1290 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 13:40:17,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:40:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 13:40:17,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:40:46,458 WARN L233 SmtUtils]: Spent 26.51s 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) [2022-12-14 13:40:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-12-14 13:40:48,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112003980] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:40:48,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [874435389] [2022-12-14 13:40:48,400 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2022-12-14 13:40:48,400 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:40:48,403 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:40:48,406 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:40:48,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:40:50,673 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-12-14 13:40:55,684 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-12-14 13:40:56,286 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 570 for LOIs [2022-12-14 13:41:05,812 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 66 for LOIs [2022-12-14 13:41:05,817 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 100 for LOIs [2022-12-14 13:41:05,908 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 111 for LOIs [2022-12-14 13:41:06,477 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 437 for LOIs [2022-12-14 13:41:07,271 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 66 for LOIs [2022-12-14 13:41:07,284 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-12-14 13:41:07,435 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 82 for LOIs [2022-12-14 13:41:07,452 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:42:16,756 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25729#(and (<= 0 |timeShift_processWaitingOnFloor_#in~floorID#1|) (= |old(~floorButtons_2~0)| 0) (<= ~floorButtons_3~0 0) (= ~executiveFloor~0 4) (= |timeShift_processWaitingOnFloor_~tmp___2~2#1| 0) (= |old(~persons_1~0)| 0) (<= ~currentFloorID~0 0) (<= ~currentHeading~0 1) (= |old(~persons_5~0)| 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 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) (<= ~personOnFloor_5_1~0 1) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (= |old(~floorButtons_0~0)| 0) (<= ~weight~0 0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (<= ~floorButtons_0~0 0) (<= 0 ~floorButtons_1~0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#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) (= ~head~0.offset 0) (<= 0 ~currentFloorID~0) (= |old(~weight~0)| 0) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 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) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| 0) (<= 0 |timeShift_~tmp___9~2#1|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 |timeShift_processWaitingOnFloor_~floorID#1|) (<= 0 |timeShift_resetFloorButton_~floorID#1|) (<= ~floorButtons_2~0 0) (= ~persons_3~0 0) (= |old(~floorButtons_4~0)| 0) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (= |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 0) (= |old(~persons_0~0)| 0) (<= 0 ~floorButtons_0~0) (= ~doorState~0 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) (= |#NULL.offset| 0) (<= ~floorButtons_4~0 0) (= |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_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|) (= ~cleanupTimeShifts~0 12) (= |timeShift_processWaitingOnFloor_~tmp___4~1#1| 0) (= |#NULL.base| 0) (= ~persons_2~0 0))' at error location [2022-12-14 13:42:16,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:42:16,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:42:16,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 16] total 32 [2022-12-14 13:42:16,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967610334] [2022-12-14 13:42:16,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:42:16,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 13:42:16,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:42:16,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 13:42:16,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=7041, Unknown=0, NotChecked=0, Total=7832 [2022-12-14 13:42:16,761 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) [2022-12-14 13:42:26,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:42:26,566 INFO L93 Difference]: Finished difference Result 3455 states and 5745 transitions. [2022-12-14 13:42:26,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-14 13:42:26,567 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 [2022-12-14 13:42:26,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:42:26,575 INFO L225 Difference]: With dead ends: 3455 [2022-12-14 13:42:26,576 INFO L226 Difference]: Without dead ends: 1904 [2022-12-14 13:42:26,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 293 SyntacticMatches, 15 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7546 ImplicationChecksByTransitivity, 72.1s TimeCoverageRelationStatistics Valid=1845, Invalid=17895, Unknown=0, NotChecked=0, Total=19740 [2022-12-14 13:42:26,584 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 5015 mSDsluCounter, 3560 mSDsCounter, 0 mSdLazyCounter, 15345 mSolverCounterSat, 2944 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5060 SdHoareTripleChecker+Valid, 3879 SdHoareTripleChecker+Invalid, 18289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2944 IncrementalHoareTripleChecker+Valid, 15345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:42:26,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5060 Valid, 3879 Invalid, 18289 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2944 Valid, 15345 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-12-14 13:42:26,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2022-12-14 13:42:26,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1761. [2022-12-14 13:42:26,688 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) [2022-12-14 13:42:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2772 transitions. [2022-12-14 13:42:26,695 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2772 transitions. Word has length 125 [2022-12-14 13:42:26,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:42:26,695 INFO L495 AbstractCegarLoop]: Abstraction has 1761 states and 2772 transitions. [2022-12-14 13:42:26,695 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) [2022-12-14 13:42:26,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2772 transitions. [2022-12-14 13:42:26,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 13:42:26,699 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:42:26,699 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] [2022-12-14 13:42:26,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:42:26,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:42:26,900 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:42:26,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:42:26,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1988585736, now seen corresponding path program 1 times [2022-12-14 13:42:26,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:42:26,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720647181] [2022-12-14 13:42:26,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:42:26,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:42:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:42:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-12-14 13:42:27,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:42:27,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720647181] [2022-12-14 13:42:27,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720647181] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:42:27,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563482269] [2022-12-14 13:42:27,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:42:27,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:42:27,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:42:27,055 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:42:27,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:42:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:42:27,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:42:27,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:42:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-14 13:42:27,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:42:27,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563482269] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:42:27,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:42:27,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-12-14 13:42:27,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349541307] [2022-12-14 13:42:27,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:42:27,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:42:27,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:42:27,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:42:27,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:42:27,328 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) [2022-12-14 13:42:27,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:42:27,915 INFO L93 Difference]: Finished difference Result 3327 states and 5238 transitions. [2022-12-14 13:42:27,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:42:27,916 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 [2022-12-14 13:42:27,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:42:27,922 INFO L225 Difference]: With dead ends: 3327 [2022-12-14 13:42:27,922 INFO L226 Difference]: Without dead ends: 1579 [2022-12-14 13:42:27,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:42:27,928 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 340 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:42:27,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 1986 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:42:27,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2022-12-14 13:42:27,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1555. [2022-12-14 13:42:27,993 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) [2022-12-14 13:42:27,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2446 transitions. [2022-12-14 13:42:27,999 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2446 transitions. Word has length 130 [2022-12-14 13:42:27,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:42:27,999 INFO L495 AbstractCegarLoop]: Abstraction has 1555 states and 2446 transitions. [2022-12-14 13:42:27,999 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) [2022-12-14 13:42:27,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2446 transitions. [2022-12-14 13:42:28,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-12-14 13:42:28,004 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:42:28,004 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] [2022-12-14 13:42:28,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 13:42:28,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:42:28,205 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:42:28,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:42:28,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1988537828, now seen corresponding path program 1 times [2022-12-14 13:42:28,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:42:28,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004136889] [2022-12-14 13:42:28,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:42:28,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:42:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:42:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-12-14 13:42:28,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:42:28,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004136889] [2022-12-14 13:42:28,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004136889] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:42:28,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308488151] [2022-12-14 13:42:28,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:42:28,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:42:28,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:42:28,663 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:42:28,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:42:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:42:28,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:42:28,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:42:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 63 proven. 10 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-14 13:42:29,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:42:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-12-14 13:42:29,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308488151] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:42:29,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1256640827] [2022-12-14 13:42:29,282 INFO L159 IcfgInterpreter]: Started Sifa with 113 locations of interest [2022-12-14 13:42:29,282 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:42:29,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:42:29,283 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:42:29,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:42:34,084 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2022-12-14 13:42:44,629 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 38 for LOIs [2022-12-14 13:42:44,696 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 51 for LOIs [2022-12-14 13:42:44,758 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 50 for LOIs [2022-12-14 13:42:44,889 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 23 for LOIs [2022-12-14 13:42:44,946 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 24 for LOIs [2022-12-14 13:42:44,953 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 62 for LOIs [2022-12-14 13:42:44,965 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 51 for LOIs [2022-12-14 13:42:44,971 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-12-14 13:42:48,508 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-12-14 13:42:49,127 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 48 for LOIs [2022-12-14 13:42:49,162 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2022-12-14 13:42:49,164 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-12-14 13:42:49,329 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:43:42,665 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40966#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 0)) (= ~executiveFloor~0 4) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 0)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 2147483647) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (= ~head~0.offset 0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483647) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| 0) (<= 0 |timeShift_~tmp___9~2#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|)) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 0 ~head~0.base) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1| 2147483647) (<= ~maximumWeight~0 100) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483648)) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |#NULL.offset| 0) (= |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|) (<= 100 ~maximumWeight~0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 13:43:42,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:43:42,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:43:42,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-12-14 13:43:42,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414583242] [2022-12-14 13:43:42,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:43:42,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 13:43:42,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:43:42,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 13:43:42,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1078, Invalid=12262, Unknown=0, NotChecked=0, Total=13340 [2022-12-14 13:43:42,670 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) [2022-12-14 13:43:52,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:43:52,626 INFO L93 Difference]: Finished difference Result 5716 states and 9215 transitions. [2022-12-14 13:43:52,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-14 13:43:52,626 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 [2022-12-14 13:43:52,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:43:52,647 INFO L225 Difference]: With dead ends: 5716 [2022-12-14 13:43:52,647 INFO L226 Difference]: Without dead ends: 4123 [2022-12-14 13:43:52,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 486 SyntacticMatches, 14 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12749 ImplicationChecksByTransitivity, 54.9s TimeCoverageRelationStatistics Valid=2242, Invalid=28558, Unknown=0, NotChecked=0, Total=30800 [2022-12-14 13:43:52,666 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 6987 mSDsluCounter, 4170 mSDsCounter, 0 mSdLazyCounter, 17700 mSolverCounterSat, 5160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7008 SdHoareTripleChecker+Valid, 4743 SdHoareTripleChecker+Invalid, 22860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5160 IncrementalHoareTripleChecker+Valid, 17700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-12-14 13:43:52,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7008 Valid, 4743 Invalid, 22860 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5160 Valid, 17700 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-12-14 13:43:52,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2022-12-14 13:43:52,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3779. [2022-12-14 13:43:52,849 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) [2022-12-14 13:43:52,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3779 states to 3779 states and 5782 transitions. [2022-12-14 13:43:52,888 INFO L78 Accepts]: Start accepts. Automaton has 3779 states and 5782 transitions. Word has length 188 [2022-12-14 13:43:52,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:43:52,888 INFO L495 AbstractCegarLoop]: Abstraction has 3779 states and 5782 transitions. [2022-12-14 13:43:52,889 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) [2022-12-14 13:43:52,889 INFO L276 IsEmpty]: Start isEmpty. Operand 3779 states and 5782 transitions. [2022-12-14 13:43:52,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-12-14 13:43:52,917 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:43:52,917 INFO L195 NwaCegarLoop]: trace histogram [14, 11, 11, 11, 11, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2022-12-14 13:43:52,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:43:53,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 13:43:53,118 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:43:53,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:43:53,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1901533037, now seen corresponding path program 1 times [2022-12-14 13:43:53,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:43:53,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231154293] [2022-12-14 13:43:53,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:43:53,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:43:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:43:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2022-12-14 13:43:53,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:43:53,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231154293] [2022-12-14 13:43:53,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231154293] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:43:53,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:43:53,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:43:53,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068574959] [2022-12-14 13:43:53,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:43:53,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:43:53,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:43:53,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:43:53,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:43:53,364 INFO L87 Difference]: Start difference. First operand 3779 states and 5782 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2022-12-14 13:43:53,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:43:53,746 INFO L93 Difference]: Finished difference Result 6511 states and 9991 transitions. [2022-12-14 13:43:53,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:43:53,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 328 [2022-12-14 13:43:53,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:43:53,764 INFO L225 Difference]: With dead ends: 6511 [2022-12-14 13:43:53,765 INFO L226 Difference]: Without dead ends: 3877 [2022-12-14 13:43:53,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:43:53,777 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 351 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:43:53,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 1005 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:43:53,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3877 states. [2022-12-14 13:43:53,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3877 to 3855. [2022-12-14 13:43:53,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3855 states, 2831 states have (on average 1.507947721653126) internal successors, (4269), 2911 states have internal predecessors, (4269), 718 states have call successors, (718), 314 states have call predecessors, (718), 305 states have return successors, (831), 689 states have call predecessors, (831), 710 states have call successors, (831) [2022-12-14 13:43:54,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3855 states to 3855 states and 5818 transitions. [2022-12-14 13:43:54,011 INFO L78 Accepts]: Start accepts. Automaton has 3855 states and 5818 transitions. Word has length 328 [2022-12-14 13:43:54,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:43:54,011 INFO L495 AbstractCegarLoop]: Abstraction has 3855 states and 5818 transitions. [2022-12-14 13:43:54,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2022-12-14 13:43:54,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3855 states and 5818 transitions. [2022-12-14 13:43:54,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-12-14 13:43:54,026 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:43:54,026 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 5, 4, 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, 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] [2022-12-14 13:43:54,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 13:43:54,026 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:43:54,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:43:54,027 INFO L85 PathProgramCache]: Analyzing trace with hash 106951291, now seen corresponding path program 1 times [2022-12-14 13:43:54,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:43:54,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149793664] [2022-12-14 13:43:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:43:54,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:43:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:43:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-12-14 13:43:54,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:43:54,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149793664] [2022-12-14 13:43:54,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149793664] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:43:54,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:43:54,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:43:54,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907381667] [2022-12-14 13:43:54,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:43:54,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:43:54,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:43:54,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:43:54,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:43:54,304 INFO L87 Difference]: Start difference. First operand 3855 states and 5818 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 3 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-12-14 13:43:54,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:43:54,665 INFO L93 Difference]: Finished difference Result 8051 states and 12377 transitions. [2022-12-14 13:43:54,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:43:54,666 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 3 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 257 [2022-12-14 13:43:54,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:43:54,678 INFO L225 Difference]: With dead ends: 8051 [2022-12-14 13:43:54,678 INFO L226 Difference]: Without dead ends: 3907 [2022-12-14 13:43:54,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:43:54,689 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 421 mSDsluCounter, 1701 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 2209 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:43:54,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 2209 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:43:54,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2022-12-14 13:43:54,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 3895. [2022-12-14 13:43:54,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3895 states, 2851 states have (on average 1.4679059978954754) internal successors, (4185), 2951 states have internal predecessors, (4185), 718 states have call successors, (718), 314 states have call predecessors, (718), 325 states have return successors, (854), 689 states have call predecessors, (854), 710 states have call successors, (854) [2022-12-14 13:43:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3895 states to 3895 states and 5757 transitions. [2022-12-14 13:43:54,908 INFO L78 Accepts]: Start accepts. Automaton has 3895 states and 5757 transitions. Word has length 257 [2022-12-14 13:43:54,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:43:54,908 INFO L495 AbstractCegarLoop]: Abstraction has 3895 states and 5757 transitions. [2022-12-14 13:43:54,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 3 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-12-14 13:43:54,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3895 states and 5757 transitions. [2022-12-14 13:43:54,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-12-14 13:43:54,926 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:43:54,926 INFO L195 NwaCegarLoop]: trace histogram [14, 11, 11, 11, 11, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2022-12-14 13:43:54,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 13:43:54,926 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:43:54,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:43:54,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1906509856, now seen corresponding path program 1 times [2022-12-14 13:43:54,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:43:54,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553474324] [2022-12-14 13:43:54,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:43:54,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:43:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:43:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 45 proven. 58 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2022-12-14 13:43:55,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:43:55,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553474324] [2022-12-14 13:43:55,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553474324] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:43:55,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553803950] [2022-12-14 13:43:55,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:43:55,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:43:55,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:43:55,627 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:43:55,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:43:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:43:56,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 3001 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:43:56,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:43:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 116 proven. 38 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2022-12-14 13:43:56,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:43:56,577 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 35 proven. 24 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2022-12-14 13:43:56,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553803950] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:43:56,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2127997045] [2022-12-14 13:43:56,581 INFO L159 IcfgInterpreter]: Started Sifa with 143 locations of interest [2022-12-14 13:43:56,581 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:43:56,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:43:56,581 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:43:56,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:44:03,758 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 555 for LOIs [2022-12-14 13:44:04,223 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 21 for LOIs [2022-12-14 13:44:07,666 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 32 for LOIs [2022-12-14 13:44:07,921 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 42 for LOIs [2022-12-14 13:44:07,958 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 80 for LOIs [2022-12-14 13:44:08,289 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 50 for LOIs [2022-12-14 13:44:08,378 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 21 for LOIs [2022-12-14 13:44:08,384 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 54 for LOIs [2022-12-14 13:44:08,395 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 42 for LOIs [2022-12-14 13:44:08,399 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-12-14 13:44:11,958 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 36 for LOIs [2022-12-14 13:44:12,004 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 57 for LOIs [2022-12-14 13:44:12,012 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 508 for LOIs [2022-12-14 13:44:14,310 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 778 for LOIs [2022-12-14 13:44:22,857 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 631 for LOIs [2022-12-14 13:44:23,337 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:44:39,757 WARN L233 SmtUtils]: Spent 5.71s 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) [2022-12-14 13:44:52,671 WARN L233 SmtUtils]: Spent 5.14s 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) [2022-12-14 13:45:01,963 WARN L233 SmtUtils]: Spent 8.73s on a formula simplification. DAG size of input: 790 DAG size of output: 771 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:45:52,824 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '87012#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 0)) (= ~executiveFloor~0 4) (<= 0 (+ ~currentFloorID~0 2147483648)) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 0)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 2147483647) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|) (<= ~currentFloorID~0 2147483647) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (= ~head~0.offset 0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483647) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| 0) (<= 0 |timeShift_~tmp___9~2#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| |timeShift_isExecutiveFloor_#res#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483648)) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |#NULL.offset| 0) (= |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|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 13:45:52,825 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:45:52,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:45:52,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-12-14 13:45:52,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598749698] [2022-12-14 13:45:52,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:45:52,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 13:45:52,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:52,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 13:45:52,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1268, Invalid=17092, Unknown=0, NotChecked=0, Total=18360 [2022-12-14 13:45:52,829 INFO L87 Difference]: Start difference. First operand 3895 states and 5757 transitions. Second operand has 27 states, 22 states have (on average 12.590909090909092) internal successors, (277), 24 states have internal predecessors, (277), 15 states have call successors, (93), 7 states have call predecessors, (93), 10 states have return successors, (88), 15 states have call predecessors, (88), 15 states have call successors, (88) [2022-12-14 13:46:07,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:46:07,476 INFO L93 Difference]: Finished difference Result 10590 states and 15877 transitions. [2022-12-14 13:46:07,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-12-14 13:46:07,477 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 12.590909090909092) internal successors, (277), 24 states have internal predecessors, (277), 15 states have call successors, (93), 7 states have call predecessors, (93), 10 states have return successors, (88), 15 states have call predecessors, (88), 15 states have call successors, (88) Word has length 332 [2022-12-14 13:46:07,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:46:07,495 INFO L225 Difference]: With dead ends: 10590 [2022-12-14 13:46:07,495 INFO L226 Difference]: Without dead ends: 5892 [2022-12-14 13:46:07,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1155 GetRequests, 884 SyntacticMatches, 40 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23447 ImplicationChecksByTransitivity, 93.8s TimeCoverageRelationStatistics Valid=3295, Invalid=50761, Unknown=0, NotChecked=0, Total=54056 [2022-12-14 13:46:07,513 INFO L413 NwaCegarLoop]: 639 mSDtfsCounter, 6462 mSDsluCounter, 6320 mSDsCounter, 0 mSdLazyCounter, 22376 mSolverCounterSat, 4554 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6471 SdHoareTripleChecker+Valid, 6959 SdHoareTripleChecker+Invalid, 26930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4554 IncrementalHoareTripleChecker+Valid, 22376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:46:07,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6471 Valid, 6959 Invalid, 26930 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4554 Valid, 22376 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-12-14 13:46:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2022-12-14 13:46:07,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 5360. [2022-12-14 13:46:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5360 states, 3893 states have (on average 1.428975083483175) internal successors, (5563), 4035 states have internal predecessors, (5563), 984 states have call successors, (984), 449 states have call predecessors, (984), 482 states have return successors, (1240), 947 states have call predecessors, (1240), 973 states have call successors, (1240) [2022-12-14 13:46:07,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5360 states to 5360 states and 7787 transitions. [2022-12-14 13:46:07,872 INFO L78 Accepts]: Start accepts. Automaton has 5360 states and 7787 transitions. Word has length 332 [2022-12-14 13:46:07,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:46:07,873 INFO L495 AbstractCegarLoop]: Abstraction has 5360 states and 7787 transitions. [2022-12-14 13:46:07,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 12.590909090909092) internal successors, (277), 24 states have internal predecessors, (277), 15 states have call successors, (93), 7 states have call predecessors, (93), 10 states have return successors, (88), 15 states have call predecessors, (88), 15 states have call successors, (88) [2022-12-14 13:46:07,873 INFO L276 IsEmpty]: Start isEmpty. Operand 5360 states and 7787 transitions. [2022-12-14 13:46:07,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-12-14 13:46:07,892 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:46:07,892 INFO L195 NwaCegarLoop]: trace histogram [16, 12, 12, 12, 12, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:46:07,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 13:46:08,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:46:08,095 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:46:08,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:46:08,096 INFO L85 PathProgramCache]: Analyzing trace with hash -472755098, now seen corresponding path program 1 times [2022-12-14 13:46:08,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:46:08,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181402269] [2022-12-14 13:46:08,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:08,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:46:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 34 proven. 52 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2022-12-14 13:46:08,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:46:08,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181402269] [2022-12-14 13:46:08,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181402269] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:46:08,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254845677] [2022-12-14 13:46:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:08,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:46:08,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:46:08,630 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:46:08,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:46:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:08,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 3094 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:46:08,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:46:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 126 proven. 46 refuted. 0 times theorem prover too weak. 611 trivial. 0 not checked. [2022-12-14 13:46:09,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:46:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 723 trivial. 0 not checked. [2022-12-14 13:46:09,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254845677] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:46:09,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1032145347] [2022-12-14 13:46:09,556 INFO L159 IcfgInterpreter]: Started Sifa with 150 locations of interest [2022-12-14 13:46:09,556 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:46:09,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:46:09,557 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:46:09,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:46:17,205 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 555 for LOIs [2022-12-14 13:46:17,677 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 21 for LOIs [2022-12-14 13:46:19,415 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 26 for LOIs [2022-12-14 13:46:19,646 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 21 for LOIs [2022-12-14 13:46:19,662 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 72 for LOIs [2022-12-14 13:46:19,835 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 50 for LOIs [2022-12-14 13:46:19,926 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 21 for LOIs [2022-12-14 13:46:19,933 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 51 for LOIs [2022-12-14 13:46:19,943 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 21 for LOIs [2022-12-14 13:46:19,945 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-12-14 13:46:23,644 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 34 for LOIs [2022-12-14 13:46:23,699 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 54 for LOIs [2022-12-14 13:46:23,706 INFO L197 IcfgInterpreter]: Interpreting procedure getReverseHeading with input of size 28 for LOIs [2022-12-14 13:46:23,708 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 508 for LOIs [2022-12-14 13:46:26,003 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 778 for LOIs [2022-12-14 13:46:30,364 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 631 for LOIs [2022-12-14 13:46:30,842 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:46:41,390 WARN L233 SmtUtils]: Spent 5.35s 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) [2022-12-14 13:46:47,195 WARN L233 SmtUtils]: Spent 5.52s 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) [2022-12-14 13:47:02,202 WARN L233 SmtUtils]: Spent 5.12s 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) [2022-12-14 13:47:08,182 WARN L233 SmtUtils]: Spent 5.56s on a formula simplification that was a NOOP. DAG size: 777 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:47:54,542 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '111619#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 0)) (= ~executiveFloor~0 4) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 0)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 2147483647) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (= ~head~0.offset 0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483647) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| 0) (<= 0 |timeShift_~tmp___9~2#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| |timeShift_isExecutiveFloor_#res#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 0 ~head~0.base) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1| 2147483647) (<= ~maximumWeight~0 100) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483648)) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |#NULL.offset| 0) (= |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|) (<= 100 ~maximumWeight~0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 13:47:54,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:47:54,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:47:54,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 22 [2022-12-14 13:47:54,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836726148] [2022-12-14 13:47:54,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:47:54,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 13:47:54,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:47:54,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 13:47:54,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1129, Invalid=17777, Unknown=0, NotChecked=0, Total=18906 [2022-12-14 13:47:54,546 INFO L87 Difference]: Start difference. First operand 5360 states and 7787 transitions. Second operand has 22 states, 17 states have (on average 15.941176470588236) internal successors, (271), 19 states have internal predecessors, (271), 13 states have call successors, (96), 6 states have call predecessors, (96), 10 states have return successors, (90), 13 states have call predecessors, (90), 13 states have call successors, (90) [2022-12-14 13:48:03,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:03,874 INFO L93 Difference]: Finished difference Result 11859 states and 17579 transitions. [2022-12-14 13:48:03,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-14 13:48:03,875 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 15.941176470588236) internal successors, (271), 19 states have internal predecessors, (271), 13 states have call successors, (96), 6 states have call predecessors, (96), 10 states have return successors, (90), 13 states have call predecessors, (90), 13 states have call successors, (90) Word has length 361 [2022-12-14 13:48:03,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:03,911 INFO L225 Difference]: With dead ends: 11859 [2022-12-14 13:48:03,911 INFO L226 Difference]: Without dead ends: 6764 [2022-12-14 13:48:03,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1160 GetRequests, 972 SyntacticMatches, 10 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12306 ImplicationChecksByTransitivity, 85.3s TimeCoverageRelationStatistics Valid=1793, Invalid=30427, Unknown=0, NotChecked=0, Total=32220 [2022-12-14 13:48:03,934 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 3562 mSDsluCounter, 5092 mSDsCounter, 0 mSdLazyCounter, 16102 mSolverCounterSat, 2996 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3569 SdHoareTripleChecker+Valid, 5714 SdHoareTripleChecker+Invalid, 19098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2996 IncrementalHoareTripleChecker+Valid, 16102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:03,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3569 Valid, 5714 Invalid, 19098 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2996 Valid, 16102 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-12-14 13:48:03,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6764 states. [2022-12-14 13:48:04,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6764 to 6372. [2022-12-14 13:48:04,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6372 states, 4621 states have (on average 1.4126812378273101) internal successors, (6528), 4787 states have internal predecessors, (6528), 1164 states have call successors, (1164), 545 states have call predecessors, (1164), 586 states have return successors, (1540), 1123 states have call predecessors, (1540), 1151 states have call successors, (1540) [2022-12-14 13:48:04,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6372 states to 6372 states and 9232 transitions. [2022-12-14 13:48:04,615 INFO L78 Accepts]: Start accepts. Automaton has 6372 states and 9232 transitions. Word has length 361 [2022-12-14 13:48:04,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:04,615 INFO L495 AbstractCegarLoop]: Abstraction has 6372 states and 9232 transitions. [2022-12-14 13:48:04,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 15.941176470588236) internal successors, (271), 19 states have internal predecessors, (271), 13 states have call successors, (96), 6 states have call predecessors, (96), 10 states have return successors, (90), 13 states have call predecessors, (90), 13 states have call successors, (90) [2022-12-14 13:48:04,616 INFO L276 IsEmpty]: Start isEmpty. Operand 6372 states and 9232 transitions. [2022-12-14 13:48:04,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-12-14 13:48:04,634 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:04,634 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 8, 8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:48:04,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 13:48:04,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 13:48:04,835 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:48:04,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:04,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1127936571, now seen corresponding path program 1 times [2022-12-14 13:48:04,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:04,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818354564] [2022-12-14 13:48:04,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:04,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2022-12-14 13:48:05,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:05,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818354564] [2022-12-14 13:48:05,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818354564] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:48:05,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:48:05,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 13:48:05,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666684579] [2022-12-14 13:48:05,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:48:05,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 13:48:05,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:05,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 13:48:05,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:48:05,043 INFO L87 Difference]: Start difference. First operand 6372 states and 9232 transitions. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 5 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (32), 5 states have call predecessors, (32), 5 states have call successors, (32) [2022-12-14 13:48:06,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:06,238 INFO L93 Difference]: Finished difference Result 13915 states and 20155 transitions. [2022-12-14 13:48:06,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 13:48:06,238 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 5 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (32), 5 states have call predecessors, (32), 5 states have call successors, (32) Word has length 269 [2022-12-14 13:48:06,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:06,267 INFO L225 Difference]: With dead ends: 13915 [2022-12-14 13:48:06,268 INFO L226 Difference]: Without dead ends: 9278 [2022-12-14 13:48:06,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-12-14 13:48:06,285 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 840 mSDsluCounter, 3075 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 3723 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:06,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 3723 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:48:06,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9278 states. [2022-12-14 13:48:06,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9278 to 9018. [2022-12-14 13:48:06,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9018 states, 6610 states have (on average 1.3915279878971256) internal successors, (9198), 6859 states have internal predecessors, (9198), 1535 states have call successors, (1535), 762 states have call predecessors, (1535), 872 states have return successors, (2191), 1480 states have call predecessors, (2191), 1522 states have call successors, (2191) [2022-12-14 13:48:06,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9018 states to 9018 states and 12924 transitions. [2022-12-14 13:48:06,925 INFO L78 Accepts]: Start accepts. Automaton has 9018 states and 12924 transitions. Word has length 269 [2022-12-14 13:48:06,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:06,925 INFO L495 AbstractCegarLoop]: Abstraction has 9018 states and 12924 transitions. [2022-12-14 13:48:06,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 5 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (32), 5 states have call predecessors, (32), 5 states have call successors, (32) [2022-12-14 13:48:06,926 INFO L276 IsEmpty]: Start isEmpty. Operand 9018 states and 12924 transitions. [2022-12-14 13:48:06,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-12-14 13:48:06,948 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:06,948 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 8, 8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:48:06,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 13:48:06,948 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:48:06,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:06,949 INFO L85 PathProgramCache]: Analyzing trace with hash 406158577, now seen corresponding path program 1 times [2022-12-14 13:48:06,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:06,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040759984] [2022-12-14 13:48:06,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:06,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:07,264 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 29 proven. 31 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2022-12-14 13:48:07,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:07,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040759984] [2022-12-14 13:48:07,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040759984] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:48:07,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132004035] [2022-12-14 13:48:07,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:07,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:07,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:48:07,266 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:48:07,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 13:48:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:07,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 2124 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:48:07,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:48:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 104 proven. 20 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2022-12-14 13:48:07,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:48:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 29 proven. 31 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2022-12-14 13:48:07,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132004035] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:48:07,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [651645497] [2022-12-14 13:48:07,984 INFO L159 IcfgInterpreter]: Started Sifa with 129 locations of interest [2022-12-14 13:48:07,985 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:48:07,985 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:48:07,985 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:48:07,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:48:13,434 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2022-12-14 13:48:21,726 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 38 for LOIs [2022-12-14 13:48:22,049 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 51 for LOIs [2022-12-14 13:48:22,113 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 88 for LOIs [2022-12-14 13:48:22,381 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 23 for LOIs [2022-12-14 13:48:22,456 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 49 for LOIs [2022-12-14 13:48:22,481 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 73 for LOIs [2022-12-14 13:48:22,506 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 51 for LOIs [2022-12-14 13:48:22,519 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-12-14 13:48:26,284 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-12-14 13:48:26,873 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 34 for LOIs [2022-12-14 13:48:26,903 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 57 for LOIs [2022-12-14 13:48:26,908 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-12-14 13:48:27,060 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:49:26,013 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '171235#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 0)) (= ~executiveFloor~0 4) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 0)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 2147483647) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (= ~head~0.offset 0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483647) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| 0) (<= 0 |timeShift_~tmp___9~2#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|)) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 0 ~head~0.base) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1| 2147483647) (<= ~maximumWeight~0 100) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483648)) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |#NULL.offset| 0) (= |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|) (<= 100 ~maximumWeight~0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 13:49:26,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:49:26,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:49:26,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-12-14 13:49:26,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782969684] [2022-12-14 13:49:26,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:49:26,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 13:49:26,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:49:26,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 13:49:26,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1005, Invalid=14001, Unknown=0, NotChecked=0, Total=15006 [2022-12-14 13:49:26,016 INFO L87 Difference]: Start difference. First operand 9018 states and 12924 transitions. Second operand has 22 states, 17 states have (on average 11.882352941176471) internal successors, (202), 19 states have internal predecessors, (202), 8 states have call successors, (65), 5 states have call predecessors, (65), 9 states have return successors, (64), 9 states have call predecessors, (64), 8 states have call successors, (64) [2022-12-14 13:49:29,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:49:29,130 INFO L93 Difference]: Finished difference Result 15616 states and 22371 transitions. [2022-12-14 13:49:29,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 13:49:29,131 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 11.882352941176471) internal successors, (202), 19 states have internal predecessors, (202), 8 states have call successors, (65), 5 states have call predecessors, (65), 9 states have return successors, (64), 9 states have call predecessors, (64), 8 states have call successors, (64) Word has length 273 [2022-12-14 13:49:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:49:29,163 INFO L225 Difference]: With dead ends: 15616 [2022-12-14 13:49:29,163 INFO L226 Difference]: Without dead ends: 9690 [2022-12-14 13:49:29,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 702 SyntacticMatches, 14 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6736 ImplicationChecksByTransitivity, 59.6s TimeCoverageRelationStatistics Valid=1196, Invalid=17436, Unknown=0, NotChecked=0, Total=18632 [2022-12-14 13:49:29,182 INFO L413 NwaCegarLoop]: 836 mSDtfsCounter, 1336 mSDsluCounter, 6004 mSDsCounter, 0 mSdLazyCounter, 4055 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1354 SdHoareTripleChecker+Valid, 6840 SdHoareTripleChecker+Invalid, 4616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 4055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:49:29,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1354 Valid, 6840 Invalid, 4616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [561 Valid, 4055 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 13:49:29,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9690 states. [2022-12-14 13:49:29,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9690 to 9481. [2022-12-14 13:49:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9481 states, 6954 states have (on average 1.3771929824561404) internal successors, (9577), 7215 states have internal predecessors, (9577), 1603 states have call successors, (1603), 800 states have call predecessors, (1603), 923 states have return successors, (2345), 1549 states have call predecessors, (2345), 1590 states have call successors, (2345) [2022-12-14 13:49:29,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9481 states to 9481 states and 13525 transitions. [2022-12-14 13:49:29,889 INFO L78 Accepts]: Start accepts. Automaton has 9481 states and 13525 transitions. Word has length 273 [2022-12-14 13:49:29,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:49:29,889 INFO L495 AbstractCegarLoop]: Abstraction has 9481 states and 13525 transitions. [2022-12-14 13:49:29,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 11.882352941176471) internal successors, (202), 19 states have internal predecessors, (202), 8 states have call successors, (65), 5 states have call predecessors, (65), 9 states have return successors, (64), 9 states have call predecessors, (64), 8 states have call successors, (64) [2022-12-14 13:49:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 9481 states and 13525 transitions. [2022-12-14 13:49:29,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2022-12-14 13:49:29,919 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:49:29,920 INFO L195 NwaCegarLoop]: trace histogram [15, 12, 12, 10, 10, 10, 10, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:49:29,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 13:49:30,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 13:49:30,121 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:49:30,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:49:30,122 INFO L85 PathProgramCache]: Analyzing trace with hash -653829790, now seen corresponding path program 1 times [2022-12-14 13:49:30,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:49:30,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323881221] [2022-12-14 13:49:30,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:49:30,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:49:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:49:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 79 proven. 30 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-12-14 13:49:30,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:49:30,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323881221] [2022-12-14 13:49:30,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323881221] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:49:30,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598859914] [2022-12-14 13:49:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:49:30,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:49:30,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:49:30,331 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:49:30,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 13:49:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:49:30,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 3170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:49:30,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:49:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 323 proven. 0 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2022-12-14 13:49:30,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:49:30,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598859914] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:49:30,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:49:30,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 13:49:30,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635354202] [2022-12-14 13:49:30,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:49:30,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:49:30,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:49:30,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:49:30,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:49:30,829 INFO L87 Difference]: Start difference. First operand 9481 states and 13525 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2022-12-14 13:49:31,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:49:31,610 INFO L93 Difference]: Finished difference Result 19065 states and 27260 transitions. [2022-12-14 13:49:31,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:49:31,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 400 [2022-12-14 13:49:31,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:49:31,641 INFO L225 Difference]: With dead ends: 19065 [2022-12-14 13:49:31,641 INFO L226 Difference]: Without dead ends: 9660 [2022-12-14 13:49:31,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:49:31,685 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 205 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:49:31,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1278 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:49:31,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9660 states. [2022-12-14 13:49:32,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9660 to 9660. [2022-12-14 13:49:32,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9660 states, 7126 states have (on average 1.3875947235475723) internal successors, (9888), 7387 states have internal predecessors, (9888), 1603 states have call successors, (1603), 807 states have call predecessors, (1603), 930 states have return successors, (2345), 1549 states have call predecessors, (2345), 1590 states have call successors, (2345) [2022-12-14 13:49:32,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9660 states to 9660 states and 13836 transitions. [2022-12-14 13:49:32,322 INFO L78 Accepts]: Start accepts. Automaton has 9660 states and 13836 transitions. Word has length 400 [2022-12-14 13:49:32,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:49:32,323 INFO L495 AbstractCegarLoop]: Abstraction has 9660 states and 13836 transitions. [2022-12-14 13:49:32,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2022-12-14 13:49:32,323 INFO L276 IsEmpty]: Start isEmpty. Operand 9660 states and 13836 transitions. [2022-12-14 13:49:32,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-12-14 13:49:32,344 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:49:32,345 INFO L195 NwaCegarLoop]: trace histogram [13, 11, 11, 11, 11, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 13:49:32,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 13:49:32,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 13:49:32,547 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:49:32,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:49:32,548 INFO L85 PathProgramCache]: Analyzing trace with hash 793726779, now seen corresponding path program 1 times [2022-12-14 13:49:32,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:49:32,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231947655] [2022-12-14 13:49:32,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:49:32,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:49:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:49:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 709 backedges. 72 proven. 39 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2022-12-14 13:49:33,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:49:33,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231947655] [2022-12-14 13:49:33,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231947655] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:49:33,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825402842] [2022-12-14 13:49:33,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:49:33,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:49:33,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:49:33,576 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:49:33,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 13:49:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:49:33,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 2967 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 13:49:33,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:49:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 709 backedges. 147 proven. 34 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-12-14 13:49:34,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:49:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 709 backedges. 47 proven. 41 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2022-12-14 13:49:34,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825402842] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:49:34,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1911235438] [2022-12-14 13:49:34,455 INFO L159 IcfgInterpreter]: Started Sifa with 121 locations of interest [2022-12-14 13:49:34,455 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:49:34,456 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:49:34,456 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:49:34,456 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:49:42,926 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 555 for LOIs [2022-12-14 13:49:43,379 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 21 for LOIs [2022-12-14 13:49:48,143 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 38 for LOIs [2022-12-14 13:49:48,203 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 51 for LOIs [2022-12-14 13:49:48,269 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 50 for LOIs [2022-12-14 13:49:48,293 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 28 for LOIs [2022-12-14 13:49:48,342 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 24 for LOIs [2022-12-14 13:49:48,349 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 74 for LOIs [2022-12-14 13:49:48,363 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 51 for LOIs [2022-12-14 13:49:48,369 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-12-14 13:49:51,937 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 48 for LOIs [2022-12-14 13:49:51,985 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2022-12-14 13:49:51,987 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 508 for LOIs [2022-12-14 13:49:54,297 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 778 for LOIs [2022-12-14 13:50:21,586 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 631 for LOIs [2022-12-14 13:50:22,116 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:50:33,643 WARN L233 SmtUtils]: Spent 6.34s 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) [2022-12-14 13:50:39,776 WARN L233 SmtUtils]: Spent 5.76s 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) [2022-12-14 13:50:55,143 WARN L233 SmtUtils]: Spent 5.42s 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) [2022-12-14 13:51:07,908 WARN L233 SmtUtils]: Spent 11.48s on a formula simplification. DAG size of input: 886 DAG size of output: 744 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:51:52,187 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '250535#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 0)) (= ~executiveFloor~0 4) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 0)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 2147483647) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (= ~head~0.offset 0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483647) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| 0) (<= 0 |timeShift_~tmp___9~2#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|)) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 0 ~head~0.base) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1| 2147483647) (<= ~maximumWeight~0 100) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483648)) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |#NULL.offset| 0) (= |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|) (<= 100 ~maximumWeight~0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 13:51:52,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:51:52,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:51:52,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 31 [2022-12-14 13:51:52,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424489469] [2022-12-14 13:51:52,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:51:52,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 13:51:52,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:52,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 13:51:52,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=939, Invalid=14067, Unknown=0, NotChecked=0, Total=15006 [2022-12-14 13:51:52,190 INFO L87 Difference]: Start difference. First operand 9660 states and 13836 transitions. Second operand has 31 states, 24 states have (on average 9.5) internal successors, (228), 26 states have internal predecessors, (228), 14 states have call successors, (91), 6 states have call predecessors, (91), 13 states have return successors, (89), 16 states have call predecessors, (89), 14 states have call successors, (89) [2022-12-14 13:52:08,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:52:08,085 INFO L93 Difference]: Finished difference Result 20212 states and 29666 transitions. [2022-12-14 13:52:08,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-12-14 13:52:08,086 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 9.5) internal successors, (228), 26 states have internal predecessors, (228), 14 states have call successors, (91), 6 states have call predecessors, (91), 13 states have return successors, (89), 16 states have call predecessors, (89), 14 states have call successors, (89) Word has length 328 [2022-12-14 13:52:08,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:52:08,130 INFO L225 Difference]: With dead ends: 20212 [2022-12-14 13:52:08,130 INFO L226 Difference]: Without dead ends: 13751 [2022-12-14 13:52:08,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1143 GetRequests, 876 SyntacticMatches, 50 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21553 ImplicationChecksByTransitivity, 94.6s TimeCoverageRelationStatistics Valid=2692, Invalid=45050, Unknown=0, NotChecked=0, Total=47742 [2022-12-14 13:52:08,156 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 6657 mSDsluCounter, 6432 mSDsCounter, 0 mSdLazyCounter, 23867 mSolverCounterSat, 4906 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6665 SdHoareTripleChecker+Valid, 6966 SdHoareTripleChecker+Invalid, 28773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4906 IncrementalHoareTripleChecker+Valid, 23867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-12-14 13:52:08,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6665 Valid, 6966 Invalid, 28773 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4906 Valid, 23867 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-12-14 13:52:08,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13751 states. [2022-12-14 13:52:09,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13751 to 12634. [2022-12-14 13:52:09,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12634 states, 9287 states have (on average 1.4031441800366102) internal successors, (13031), 9613 states have internal predecessors, (13031), 2167 states have call successors, (2167), 1041 states have call predecessors, (2167), 1179 states have return successors, (3371), 2111 states have call predecessors, (3371), 2146 states have call successors, (3371) [2022-12-14 13:52:09,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12634 states to 12634 states and 18569 transitions. [2022-12-14 13:52:09,074 INFO L78 Accepts]: Start accepts. Automaton has 12634 states and 18569 transitions. Word has length 328 [2022-12-14 13:52:09,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:52:09,074 INFO L495 AbstractCegarLoop]: Abstraction has 12634 states and 18569 transitions. [2022-12-14 13:52:09,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 9.5) internal successors, (228), 26 states have internal predecessors, (228), 14 states have call successors, (91), 6 states have call predecessors, (91), 13 states have return successors, (89), 16 states have call predecessors, (89), 14 states have call successors, (89) [2022-12-14 13:52:09,075 INFO L276 IsEmpty]: Start isEmpty. Operand 12634 states and 18569 transitions. [2022-12-14 13:52:09,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-12-14 13:52:09,114 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:52:09,114 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:52:09,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 13:52:09,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 13:52:09,315 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:52:09,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:52:09,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1162372807, now seen corresponding path program 1 times [2022-12-14 13:52:09,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:52:09,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319590524] [2022-12-14 13:52:09,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:52:09,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:52:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:52:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 42 proven. 10 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2022-12-14 13:52:09,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:52:09,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319590524] [2022-12-14 13:52:09,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319590524] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:52:09,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417649897] [2022-12-14 13:52:09,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:52:09,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:52:09,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:52:09,832 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:52:09,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09827307-e6b4-41ca-a4cf-6b41dba90fd5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 13:52:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:52:10,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 2204 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 13:52:10,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:52:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 248 proven. 22 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-12-14 13:52:10,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:52:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 52 proven. 39 refuted. 0 times theorem prover too weak. 398 trivial. 0 not checked. [2022-12-14 13:52:13,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417649897] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:52:13,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [363797607] [2022-12-14 13:52:13,248 INFO L159 IcfgInterpreter]: Started Sifa with 138 locations of interest [2022-12-14 13:52:13,248 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:52:13,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:52:13,249 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:52:13,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:52:18,533 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2022-12-14 13:52:28,951 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 57 for LOIs [2022-12-14 13:52:29,586 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 21 for LOIs [2022-12-14 13:52:29,624 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 50 for LOIs [2022-12-14 13:52:29,753 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 28 for LOIs [2022-12-14 13:52:29,799 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 55 for LOIs [2022-12-14 13:52:29,811 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 59 for LOIs [2022-12-14 13:52:29,823 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 21 for LOIs [2022-12-14 13:52:29,824 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-12-14 13:52:33,343 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-12-14 13:52:33,943 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 31 for LOIs [2022-12-14 13:52:33,987 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 51 for LOIs [2022-12-14 13:52:33,991 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-12-14 13:52:34,139 INFO L197 IcfgInterpreter]: Interpreting procedure getReverseHeading with input of size 30 for LOIs [2022-12-14 13:52:34,142 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:53:41,760 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '298593#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 0)) (= ~executiveFloor~0 4) (<= 0 (+ ~currentFloorID~0 2147483648)) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 0)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 2147483647) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|) (<= ~currentFloorID~0 2147483647) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (= ~head~0.offset 0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483647) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| 0) (<= 0 |timeShift_~tmp___9~2#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|)) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483648)) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |#NULL.offset| 0) (= |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|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 13:53:41,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:53:41,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:53:41,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 17] total 39 [2022-12-14 13:53:41,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522669120] [2022-12-14 13:53:41,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:53:41,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 13:53:41,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:53:41,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 13:53:41,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1536, Invalid=21416, Unknown=0, NotChecked=0, Total=22952 [2022-12-14 13:53:41,764 INFO L87 Difference]: Start difference. First operand 12634 states and 18569 transitions. Second operand has 39 states, 31 states have (on average 8.96774193548387) internal successors, (278), 30 states have internal predecessors, (278), 18 states have call successors, (91), 8 states have call predecessors, (91), 18 states have return successors, (93), 23 states have call predecessors, (93), 18 states have call successors, (93)