./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 b5237d83 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_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/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_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba --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-b5237d8 [2022-11-22 02:47:43,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:47:43,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:47:43,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:47:43,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:47:43,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:47:43,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:47:44,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:47:44,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:47:44,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:47:44,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:47:44,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:47:44,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:47:44,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:47:44,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:47:44,035 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:47:44,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:47:44,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:47:44,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:47:44,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:47:44,048 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:47:44,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:47:44,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:47:44,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:47:44,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:47:44,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:47:44,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:47:44,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:47:44,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:47:44,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:47:44,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:47:44,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:47:44,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:47:44,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:47:44,068 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:47:44,068 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:47:44,069 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:47:44,069 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:47:44,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:47:44,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:47:44,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:47:44,074 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:47:44,110 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:47:44,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:47:44,111 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:47:44,111 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:47:44,112 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:47:44,112 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:47:44,112 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:47:44,113 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:47:44,113 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:47:44,113 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:47:44,114 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:47:44,114 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:47:44,114 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:47:44,115 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:47:44,115 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:47:44,115 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:47:44,115 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:47:44,116 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:47:44,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:47:44,116 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:47:44,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:47:44,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:47:44,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:47:44,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:47:44,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:47:44,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:47:44,118 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:47:44,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:47:44,119 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:47:44,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:47:44,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:47:44,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:47:44,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:47:44,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:47:44,120 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:47:44,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:47:44,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:47:44,121 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:47:44,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:47:44,121 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:47:44,122 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:47:44,122 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_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e [2022-11-22 02:47:44,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:47:44,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:47:44,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:47:44,466 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:47:44,467 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:47:44,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2022-11-22 02:47:47,508 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:47:47,880 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:47:47,881 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2022-11-22 02:47:47,900 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/data/a1f71363e/16092e064aab432e82cada7383eb5047/FLAG935b8ac82 [2022-11-22 02:47:47,914 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/data/a1f71363e/16092e064aab432e82cada7383eb5047 [2022-11-22 02:47:47,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:47:47,920 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:47:47,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:47:47,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:47:47,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:47:47,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:47:47" (1/1) ... [2022-11-22 02:47:47,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@377fe4eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:47, skipping insertion in model container [2022-11-22 02:47:47,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:47:47" (1/1) ... [2022-11-22 02:47:47,934 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:47:47,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:47:48,175 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_5559f9f4-1101-4991-8ed8-8b99b484bea3/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2022-11-22 02:47:48,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:47:48,555 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:47:48,575 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_5559f9f4-1101-4991-8ed8-8b99b484bea3/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2022-11-22 02:47:48,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:47:48,783 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:47:48,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:48 WrapperNode [2022-11-22 02:47:48,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:47:48,789 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:47:48,789 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:47:48,789 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:47:48,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:48" (1/1) ... [2022-11-22 02:47:48,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:48" (1/1) ... [2022-11-22 02:47:48,888 INFO L138 Inliner]: procedures = 92, calls = 335, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 1095 [2022-11-22 02:47:48,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:47:48,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:47:48,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:47:48,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:47:48,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:48" (1/1) ... [2022-11-22 02:47:48,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:48" (1/1) ... [2022-11-22 02:47:48,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:48" (1/1) ... [2022-11-22 02:47:48,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:48" (1/1) ... [2022-11-22 02:47:48,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:48" (1/1) ... [2022-11-22 02:47:48,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:48" (1/1) ... [2022-11-22 02:47:48,949 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:48" (1/1) ... [2022-11-22 02:47:48,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:48" (1/1) ... [2022-11-22 02:47:48,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:47:48,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:47:48,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:47:48,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:47:48,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:48" (1/1) ... [2022-11-22 02:47:48,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:47:49,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:47:49,025 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:47:49,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:47:49,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:47:49,072 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-22 02:47:49,072 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-22 02:47:49,072 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-22 02:47:49,072 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-22 02:47:49,073 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 02:47:49,073 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 02:47:49,073 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-22 02:47:49,073 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-22 02:47:49,073 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 02:47:49,073 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 02:47:49,073 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-22 02:47:49,074 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-22 02:47:49,074 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 02:47:49,074 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 02:47:49,074 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 02:47:49,074 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 02:47:49,074 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 02:47:49,074 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 02:47:49,075 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 02:47:49,075 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 02:47:49,075 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 02:47:49,075 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 02:47:49,075 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 02:47:49,075 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 02:47:49,076 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-22 02:47:49,076 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-22 02:47:49,076 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 02:47:49,076 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 02:47:49,076 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-22 02:47:49,076 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-22 02:47:49,076 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 02:47:49,077 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 02:47:49,077 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 02:47:49,077 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 02:47:49,077 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 02:47:49,077 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 02:47:49,077 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 02:47:49,078 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 02:47:49,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:47:49,078 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 02:47:49,078 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 02:47:49,078 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 02:47:49,078 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 02:47:49,078 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 02:47:49,079 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 02:47:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:47:49,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:47:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 02:47:49,079 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 02:47:49,228 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:47:49,231 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:47:50,441 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:47:51,260 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:47:51,261 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 02:47:51,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:47:51 BoogieIcfgContainer [2022-11-22 02:47:51,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:47:51,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:47:51,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:47:51,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:47:51,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:47:47" (1/3) ... [2022-11-22 02:47:51,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e181da0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:47:51, skipping insertion in model container [2022-11-22 02:47:51,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:47:48" (2/3) ... [2022-11-22 02:47:51,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e181da0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:47:51, skipping insertion in model container [2022-11-22 02:47:51,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:47:51" (3/3) ... [2022-11-22 02:47:51,279 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product27.cil.c [2022-11-22 02:47:51,297 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:47:51,298 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:47:51,373 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:47:51,380 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;@6c2e47e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:47:51,380 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:47:51,387 INFO L276 IsEmpty]: Start isEmpty. Operand has 353 states, 235 states have (on average 1.5702127659574467) internal successors, (369), 251 states have internal predecessors, (369), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2022-11-22 02:47:51,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-22 02:47:51,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:47:51,420 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:47:51,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:47:51,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:47:51,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1884041600, now seen corresponding path program 1 times [2022-11-22 02:47:51,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:47:51,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134132409] [2022-11-22 02:47:51,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:47:51,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:47:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:47:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 02:47:52,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:47:52,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134132409] [2022-11-22 02:47:52,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134132409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:47:52,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:47:52,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:47:52,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800865200] [2022-11-22 02:47:52,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:47:52,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:47:52,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:47:52,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:47:52,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:47:52,496 INFO L87 Difference]: Start difference. First operand has 353 states, 235 states have (on average 1.5702127659574467) internal successors, (369), 251 states have internal predecessors, (369), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-22 02:47:53,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:47:53,490 INFO L93 Difference]: Finished difference Result 1037 states and 1657 transitions. [2022-11-22 02:47:53,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:47:53,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 73 [2022-11-22 02:47:53,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:47:53,521 INFO L225 Difference]: With dead ends: 1037 [2022-11-22 02:47:53,521 INFO L226 Difference]: Without dead ends: 685 [2022-11-22 02:47:53,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:47:53,535 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 530 mSDsluCounter, 1644 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 2306 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:47:53,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 2306 Invalid, 388 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 02:47:53,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-11-22 02:47:53,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 679. [2022-11-22 02:47:53,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 455 states have (on average 1.5604395604395604) internal successors, (710), 484 states have internal predecessors, (710), 180 states have call successors, (180), 45 states have call predecessors, (180), 43 states have return successors, (186), 174 states have call predecessors, (186), 178 states have call successors, (186) [2022-11-22 02:47:53,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1076 transitions. [2022-11-22 02:47:53,717 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1076 transitions. Word has length 73 [2022-11-22 02:47:53,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:47:53,718 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 1076 transitions. [2022-11-22 02:47:53,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-22 02:47:53,718 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1076 transitions. [2022-11-22 02:47:53,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-22 02:47:53,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:47:53,723 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:47:53,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:47:53,724 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:47:53,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:47:53,725 INFO L85 PathProgramCache]: Analyzing trace with hash 526041047, now seen corresponding path program 1 times [2022-11-22 02:47:53,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:47:53,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129586945] [2022-11-22 02:47:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:47:53,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:47:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:47:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 02:47:54,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:47:54,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129586945] [2022-11-22 02:47:54,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129586945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:47:54,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:47:54,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:47:54,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568671516] [2022-11-22 02:47:54,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:47:54,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:47:54,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:47:54,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:47:54,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:47:54,085 INFO L87 Difference]: Start difference. First operand 679 states and 1076 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 02:47:54,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:47:54,928 INFO L93 Difference]: Finished difference Result 776 states and 1223 transitions. [2022-11-22 02:47:54,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:47:54,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 77 [2022-11-22 02:47:54,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:47:54,938 INFO L225 Difference]: With dead ends: 776 [2022-11-22 02:47:54,938 INFO L226 Difference]: Without dead ends: 774 [2022-11-22 02:47:54,944 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 [2022-11-22 02:47:54,947 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 637 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:47:54,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 1626 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 02:47:54,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-11-22 02:47:55,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 764. [2022-11-22 02:47:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 506 states have (on average 1.5276679841897234) internal successors, (773), 535 states have internal predecessors, (773), 202 states have call successors, (202), 58 states have call predecessors, (202), 55 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-22 02:47:55,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1189 transitions. [2022-11-22 02:47:55,042 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1189 transitions. Word has length 77 [2022-11-22 02:47:55,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:47:55,045 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 1189 transitions. [2022-11-22 02:47:55,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 02:47:55,045 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1189 transitions. [2022-11-22 02:47:55,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-22 02:47:55,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:47:55,054 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:47:55,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:47:55,054 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:47:55,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:47:55,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1228260862, now seen corresponding path program 1 times [2022-11-22 02:47:55,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:47:55,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446263208] [2022-11-22 02:47:55,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:47:55,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:47:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:47:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-22 02:47:55,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:47:55,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446263208] [2022-11-22 02:47:55,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446263208] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:47:55,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:47:55,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:47:55,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625200654] [2022-11-22 02:47:55,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:47:55,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:47:55,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:47:55,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:47:55,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:47:55,374 INFO L87 Difference]: Start difference. First operand 764 states and 1189 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-22 02:47:55,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:47:55,606 INFO L93 Difference]: Finished difference Result 1554 states and 2447 transitions. [2022-11-22 02:47:55,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:47:55,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 108 [2022-11-22 02:47:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:47:55,614 INFO L225 Difference]: With dead ends: 1554 [2022-11-22 02:47:55,614 INFO L226 Difference]: Without dead ends: 802 [2022-11-22 02:47:55,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:47:55,631 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 [2022-11-22 02:47:55,632 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] [2022-11-22 02:47:55,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-11-22 02:47:55,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 768. [2022-11-22 02:47:55,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 510 states have (on average 1.5235294117647058) internal successors, (777), 539 states have internal predecessors, (777), 202 states have call successors, (202), 58 states have call predecessors, (202), 55 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-22 02:47:55,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1193 transitions. [2022-11-22 02:47:55,713 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1193 transitions. Word has length 108 [2022-11-22 02:47:55,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:47:55,713 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1193 transitions. [2022-11-22 02:47:55,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-22 02:47:55,714 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1193 transitions. [2022-11-22 02:47:55,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-22 02:47:55,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:47:55,723 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:47:55,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:47:55,723 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:47:55,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:47:55,724 INFO L85 PathProgramCache]: Analyzing trace with hash 782844242, now seen corresponding path program 1 times [2022-11-22 02:47:55,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:47:55,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504716862] [2022-11-22 02:47:55,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:47:55,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:47:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:47:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-22 02:47:56,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:47:56,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504716862] [2022-11-22 02:47:56,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504716862] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:47:56,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136022083] [2022-11-22 02:47:56,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:47:56,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:47:56,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:47:56,030 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:47:56,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:47:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:47:56,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:47:56,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:47:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 02:47:56,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:47:56,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136022083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:47:56,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:47:56,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-22 02:47:56,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083131250] [2022-11-22 02:47:56,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:47:56,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:47:56,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:47:56,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:47:56,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:47:56,598 INFO L87 Difference]: Start difference. First operand 768 states and 1193 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-22 02:47:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:47:56,957 INFO L93 Difference]: Finished difference Result 1602 states and 2536 transitions. [2022-11-22 02:47:56,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:47:56,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 111 [2022-11-22 02:47:56,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:47:56,970 INFO L225 Difference]: With dead ends: 1602 [2022-11-22 02:47:56,970 INFO L226 Difference]: Without dead ends: 846 [2022-11-22 02:47:56,978 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 [2022-11-22 02:47:56,984 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 213 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:47:56,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1308 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:47:56,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-11-22 02:47:57,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 846. [2022-11-22 02:47:57,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 586 states have (on average 1.575085324232082) internal successors, (923), 615 states have internal predecessors, (923), 202 states have call successors, (202), 60 states have call predecessors, (202), 57 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-22 02:47:57,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1339 transitions. [2022-11-22 02:47:57,043 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1339 transitions. Word has length 111 [2022-11-22 02:47:57,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:47:57,044 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1339 transitions. [2022-11-22 02:47:57,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-22 02:47:57,044 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1339 transitions. [2022-11-22 02:47:57,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-22 02:47:57,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:47:57,049 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:47:57,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:47:57,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:47:57,259 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:47:57,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:47:57,260 INFO L85 PathProgramCache]: Analyzing trace with hash -2008837937, now seen corresponding path program 1 times [2022-11-22 02:47:57,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:47:57,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954610060] [2022-11-22 02:47:57,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:47:57,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:47:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:47:57,488 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-22 02:47:57,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:47:57,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954610060] [2022-11-22 02:47:57,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954610060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:47:57,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138906196] [2022-11-22 02:47:57,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:47:57,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:47:57,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:47:57,491 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:47:57,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:47:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:47:57,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:47:57,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:47:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 02:47:57,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:47:57,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138906196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:47:57,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:47:57,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-22 02:47:57,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995304842] [2022-11-22 02:47:57,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:47:57,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:47:57,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:47:57,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:47:57,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:47:57,872 INFO L87 Difference]: Start difference. First operand 846 states and 1339 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-22 02:47:58,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:47:58,236 INFO L93 Difference]: Finished difference Result 1758 states and 2826 transitions. [2022-11-22 02:47:58,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:47:58,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 116 [2022-11-22 02:47:58,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:47:58,243 INFO L225 Difference]: With dead ends: 1758 [2022-11-22 02:47:58,243 INFO L226 Difference]: Without dead ends: 924 [2022-11-22 02:47:58,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:47:58,249 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 211 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:47:58,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1308 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:47:58,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-11-22 02:47:58,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 924. [2022-11-22 02:47:58,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 662 states have (on average 1.6148036253776434) internal successors, (1069), 691 states have internal predecessors, (1069), 202 states have call successors, (202), 62 states have call predecessors, (202), 59 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-22 02:47:58,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1485 transitions. [2022-11-22 02:47:58,300 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1485 transitions. Word has length 116 [2022-11-22 02:47:58,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:47:58,301 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1485 transitions. [2022-11-22 02:47:58,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-22 02:47:58,302 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1485 transitions. [2022-11-22 02:47:58,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-22 02:47:58,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:47:58,306 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:47:58,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:47:58,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:47:58,518 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:47:58,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:47:58,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1280945471, now seen corresponding path program 1 times [2022-11-22 02:47:58,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:47:58,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218837057] [2022-11-22 02:47:58,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:47:58,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:47:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:47:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-22 02:47:58,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:47:58,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218837057] [2022-11-22 02:47:58,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218837057] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:47:58,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960365139] [2022-11-22 02:47:58,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:47:58,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:47:58,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:47:58,691 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:47:58,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:47:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:47:59,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 1291 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:47:59,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:47:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 02:47:59,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:47:59,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960365139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:47:59,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:47:59,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-22 02:47:59,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402737582] [2022-11-22 02:47:59,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:47:59,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:47:59,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:47:59,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:47:59,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:47:59,096 INFO L87 Difference]: Start difference. First operand 924 states and 1485 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-22 02:47:59,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:47:59,491 INFO L93 Difference]: Finished difference Result 1914 states and 3116 transitions. [2022-11-22 02:47:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:47:59,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 120 [2022-11-22 02:47:59,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:47:59,499 INFO L225 Difference]: With dead ends: 1914 [2022-11-22 02:47:59,499 INFO L226 Difference]: Without dead ends: 1002 [2022-11-22 02:47:59,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:47:59,505 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 209 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:47:59,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1308 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:47:59,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-11-22 02:47:59,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 1002. [2022-11-22 02:47:59,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 738 states have (on average 1.646341463414634) internal successors, (1215), 767 states have internal predecessors, (1215), 202 states have call successors, (202), 64 states have call predecessors, (202), 61 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-22 02:47:59,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1631 transitions. [2022-11-22 02:47:59,558 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1631 transitions. Word has length 120 [2022-11-22 02:47:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:47:59,558 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1631 transitions. [2022-11-22 02:47:59,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-22 02:47:59,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1631 transitions. [2022-11-22 02:47:59,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-22 02:47:59,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:47:59,567 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:47:59,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:47:59,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 02:47:59,775 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:47:59,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:47:59,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1320443278, now seen corresponding path program 1 times [2022-11-22 02:47:59,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:47:59,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198580197] [2022-11-22 02:47:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:47:59,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:47:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:47:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-22 02:47:59,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:47:59,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198580197] [2022-11-22 02:47:59,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198580197] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:47:59,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866177845] [2022-11-22 02:47:59,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:47:59,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:47:59,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:47:59,939 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:47:59,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:48:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:48:00,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:48:00,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:48:00,303 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-22 02:48:00,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:48:00,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866177845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:48:00,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:48:00,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-22 02:48:00,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321785156] [2022-11-22 02:48:00,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:48:00,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:48:00,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:48:00,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:48:00,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:48:00,306 INFO L87 Difference]: Start difference. First operand 1002 states and 1631 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-22 02:48:00,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:48:00,636 INFO L93 Difference]: Finished difference Result 2070 states and 3406 transitions. [2022-11-22 02:48:00,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:48:00,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 123 [2022-11-22 02:48:00,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:48:00,645 INFO L225 Difference]: With dead ends: 2070 [2022-11-22 02:48:00,645 INFO L226 Difference]: Without dead ends: 1080 [2022-11-22 02:48:00,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:48:00,695 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 207 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:48:00,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1308 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:48:00,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-11-22 02:48:00,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1080. [2022-11-22 02:48:00,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 814 states have (on average 1.671990171990172) internal successors, (1361), 843 states have internal predecessors, (1361), 202 states have call successors, (202), 66 states have call predecessors, (202), 63 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-22 02:48:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1777 transitions. [2022-11-22 02:48:00,777 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1777 transitions. Word has length 123 [2022-11-22 02:48:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:48:00,779 INFO L495 AbstractCegarLoop]: Abstraction has 1080 states and 1777 transitions. [2022-11-22 02:48:00,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-22 02:48:00,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1777 transitions. [2022-11-22 02:48:00,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-22 02:48:00,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:48:00,786 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:48:00,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:48:00,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 02:48:00,994 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:48:00,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:48:00,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2027278208, now seen corresponding path program 1 times [2022-11-22 02:48:00,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:48:00,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045556544] [2022-11-22 02:48:00,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:48:00,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:48:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:48:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-22 02:48:01,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:48:01,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045556544] [2022-11-22 02:48:01,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045556544] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:48:01,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361880555] [2022-11-22 02:48:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:48:01,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:48:01,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:48:01,327 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:48:01,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:48:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:48:01,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 1290 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-22 02:48:01,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:48:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-22 02:48:02,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:48:55,633 WARN L233 SmtUtils]: Spent 49.57s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-22 02:48:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-22 02:48:58,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361880555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:48:58,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [376528935] [2022-11-22 02:48:58,477 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2022-11-22 02:48:58,477 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:48:58,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:48:58,486 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:48:58,486 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:49:01,378 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-22 02:49:05,073 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-22 02:49:05,760 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 570 for LOIs [2022-11-22 02:49:16,604 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 66 for LOIs [2022-11-22 02:49:16,611 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 100 for LOIs [2022-11-22 02:49:16,719 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 111 for LOIs [2022-11-22 02:49:17,441 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 437 for LOIs [2022-11-22 02:49:18,142 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 66 for LOIs [2022-11-22 02:49:18,157 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-22 02:49:18,292 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 82 for LOIs [2022-11-22 02:49:18,311 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:49:41,129 WARN L233 SmtUtils]: Spent 7.08s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:49:48,545 WARN L233 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:49:57,375 WARN L233 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:50:14,746 WARN L233 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 610 DAG size of output: 585 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:50:20,673 WARN L233 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 610 DAG size of output: 585 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:50:26,601 WARN L233 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 606 DAG size of output: 581 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:51:03,823 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 [2022-11-22 02:51:03,823 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:51:03,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:51:03,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 16] total 32 [2022-11-22 02:51:03,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064113003] [2022-11-22 02:51:03,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:51:03,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-22 02:51:03,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:51:03,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-22 02:51:03,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=7041, Unknown=0, NotChecked=0, Total=7832 [2022-11-22 02:51:03,828 INFO L87 Difference]: Start difference. First operand 1080 states and 1777 transitions. Second operand has 32 states, 23 states have (on average 7.434782608695652) internal successors, (171), 24 states have internal predecessors, (171), 9 states have call successors, (47), 8 states have call predecessors, (47), 15 states have return successors, (46), 16 states have call predecessors, (46), 9 states have call successors, (46) [2022-11-22 02:51:20,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:51:20,242 INFO L93 Difference]: Finished difference Result 3455 states and 5745 transitions. [2022-11-22 02:51:20,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-22 02:51:20,243 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 23 states have (on average 7.434782608695652) internal successors, (171), 24 states have internal predecessors, (171), 9 states have call successors, (47), 8 states have call predecessors, (47), 15 states have return successors, (46), 16 states have call predecessors, (46), 9 states have call successors, (46) Word has length 125 [2022-11-22 02:51:20,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:51:20,257 INFO L225 Difference]: With dead ends: 3455 [2022-11-22 02:51:20,257 INFO L226 Difference]: Without dead ends: 1904 [2022-11-22 02:51:20,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 293 SyntacticMatches, 15 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7546 ImplicationChecksByTransitivity, 109.6s TimeCoverageRelationStatistics Valid=1845, Invalid=17895, Unknown=0, NotChecked=0, Total=19740 [2022-11-22 02:51:20,276 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 5607 mSDsluCounter, 3560 mSDsCounter, 0 mSdLazyCounter, 15345 mSolverCounterSat, 3085 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5652 SdHoareTripleChecker+Valid, 3879 SdHoareTripleChecker+Invalid, 18430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 3085 IncrementalHoareTripleChecker+Valid, 15345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:51:20,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5652 Valid, 3879 Invalid, 18430 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [3085 Valid, 15345 Invalid, 0 Unknown, 0 Unchecked, 12.6s Time] [2022-11-22 02:51:20,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2022-11-22 02:51:20,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1761. [2022-11-22 02:51:20,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1262 states have (on average 1.5736925515055467) internal successors, (1986), 1324 states have internal predecessors, (1986), 372 states have call successors, (372), 132 states have call predecessors, (372), 126 states have return successors, (414), 352 states have call predecessors, (414), 369 states have call successors, (414) [2022-11-22 02:51:20,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2772 transitions. [2022-11-22 02:51:20,424 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2772 transitions. Word has length 125 [2022-11-22 02:51:20,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:51:20,425 INFO L495 AbstractCegarLoop]: Abstraction has 1761 states and 2772 transitions. [2022-11-22 02:51:20,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 23 states have (on average 7.434782608695652) internal successors, (171), 24 states have internal predecessors, (171), 9 states have call successors, (47), 8 states have call predecessors, (47), 15 states have return successors, (46), 16 states have call predecessors, (46), 9 states have call successors, (46) [2022-11-22 02:51:20,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2772 transitions. [2022-11-22 02:51:20,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-22 02:51:20,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:51:20,433 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:51:20,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:51:20,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:51:20,640 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:51:20,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:51:20,641 INFO L85 PathProgramCache]: Analyzing trace with hash -654703038, now seen corresponding path program 1 times [2022-11-22 02:51:20,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:51:20,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680253908] [2022-11-22 02:51:20,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:51:20,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:51:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:51:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-22 02:51:20,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:51:20,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680253908] [2022-11-22 02:51:20,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680253908] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:51:20,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835026745] [2022-11-22 02:51:20,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:51:20,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:51:20,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:51:20,968 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:51:20,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:51:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:51:21,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:51:21,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:51:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-22 02:51:21,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:51:21,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835026745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:51:21,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:51:21,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-22 02:51:21,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526901876] [2022-11-22 02:51:21,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:51:21,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:51:21,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:51:21,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:51:21,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:51:21,470 INFO L87 Difference]: Start difference. First operand 1761 states and 2772 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-22 02:51:22,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:51:22,463 INFO L93 Difference]: Finished difference Result 3327 states and 5238 transitions. [2022-11-22 02:51:22,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:51:22,464 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 130 [2022-11-22 02:51:22,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:51:22,475 INFO L225 Difference]: With dead ends: 3327 [2022-11-22 02:51:22,475 INFO L226 Difference]: Without dead ends: 1579 [2022-11-22 02:51:22,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:51:22,485 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 341 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:51:22,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 1986 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:51:22,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2022-11-22 02:51:22,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1555. [2022-11-22 02:51:22,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1134 states have (on average 1.5864197530864197) internal successors, (1799), 1180 states have internal predecessors, (1799), 309 states have call successors, (309), 116 states have call predecessors, (309), 111 states have return successors, (338), 294 states have call predecessors, (338), 306 states have call successors, (338) [2022-11-22 02:51:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2446 transitions. [2022-11-22 02:51:22,605 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2446 transitions. Word has length 130 [2022-11-22 02:51:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:51:22,606 INFO L495 AbstractCegarLoop]: Abstraction has 1555 states and 2446 transitions. [2022-11-22 02:51:22,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-22 02:51:22,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2446 transitions. [2022-11-22 02:51:22,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-22 02:51:22,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:51:22,615 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:51:22,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:51:22,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:51:22,829 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:51:22,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:51:22,829 INFO L85 PathProgramCache]: Analyzing trace with hash 541974728, now seen corresponding path program 1 times [2022-11-22 02:51:22,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:51:22,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148461247] [2022-11-22 02:51:22,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:51:22,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:51:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:51:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-22 02:51:23,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:51:23,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148461247] [2022-11-22 02:51:23,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148461247] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:51:23,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564642175] [2022-11-22 02:51:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:51:23,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:51:23,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:51:23,663 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:51:23,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:51:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:51:24,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:51:24,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:51:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 63 proven. 10 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-22 02:51:24,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:51:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-22 02:51:24,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564642175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:51:24,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1515966043] [2022-11-22 02:51:24,774 INFO L159 IcfgInterpreter]: Started Sifa with 113 locations of interest [2022-11-22 02:51:24,774 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:51:24,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:51:24,775 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:51:24,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:51:31,316 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2022-11-22 02:51:44,692 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 38 for LOIs [2022-11-22 02:51:44,788 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 51 for LOIs [2022-11-22 02:51:44,871 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 50 for LOIs [2022-11-22 02:51:45,054 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 23 for LOIs [2022-11-22 02:51:45,117 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 24 for LOIs [2022-11-22 02:51:45,130 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 62 for LOIs [2022-11-22 02:51:45,152 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 51 for LOIs [2022-11-22 02:51:45,164 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-22 02:51:49,312 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-22 02:51:50,039 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 48 for LOIs [2022-11-22 02:51:50,082 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2022-11-22 02:51:50,085 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-22 02:51:50,310 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:52:13,047 WARN L233 SmtUtils]: Spent 7.18s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:52:20,629 WARN L233 SmtUtils]: Spent 7.22s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:52:29,688 WARN L233 SmtUtils]: Spent 5.45s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:52:42,594 WARN L233 SmtUtils]: Spent 6.49s on a formula simplification. DAG size of input: 659 DAG size of output: 562 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:53:15,896 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40967#(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 [2022-11-22 02:53:15,897 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:53:15,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:53:15,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-11-22 02:53:15,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879482450] [2022-11-22 02:53:15,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:53:15,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 02:53:15,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:53:15,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 02:53:15,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1099, Invalid=12473, Unknown=0, NotChecked=0, Total=13572 [2022-11-22 02:53:15,903 INFO L87 Difference]: Start difference. First operand 1555 states and 2446 transitions. Second operand has 26 states, 20 states have (on average 10.15) internal successors, (203), 22 states have internal predecessors, (203), 14 states have call successors, (66), 8 states have call predecessors, (66), 9 states have return successors, (64), 15 states have call predecessors, (64), 13 states have call successors, (64) [2022-11-22 02:53:32,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:53:32,914 INFO L93 Difference]: Finished difference Result 5716 states and 9215 transitions. [2022-11-22 02:53:32,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-22 02:53:32,915 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 10.15) internal successors, (203), 22 states have internal predecessors, (203), 14 states have call successors, (66), 8 states have call predecessors, (66), 9 states have return successors, (64), 15 states have call predecessors, (64), 13 states have call successors, (64) Word has length 188 [2022-11-22 02:53:32,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:53:32,944 INFO L225 Difference]: With dead ends: 5716 [2022-11-22 02:53:32,945 INFO L226 Difference]: Without dead ends: 4123 [2022-11-22 02:53:32,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 485 SyntacticMatches, 14 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12891 ImplicationChecksByTransitivity, 87.8s TimeCoverageRelationStatistics Valid=2314, Invalid=28838, Unknown=0, NotChecked=0, Total=31152 [2022-11-22 02:53:32,967 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 8596 mSDsluCounter, 4361 mSDsCounter, 0 mSdLazyCounter, 18228 mSolverCounterSat, 6377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8618 SdHoareTripleChecker+Valid, 4932 SdHoareTripleChecker+Invalid, 24605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6377 IncrementalHoareTripleChecker+Valid, 18228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:53:32,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8618 Valid, 4932 Invalid, 24605 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6377 Valid, 18228 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time] [2022-11-22 02:53:32,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2022-11-22 02:53:33,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3779. [2022-11-22 02:53:33,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3779 states, 2781 states have (on average 1.5329018338727076) internal successors, (4263), 2861 states have internal predecessors, (4263), 704 states have call successors, (704), 302 states have call predecessors, (704), 293 states have return successors, (815), 675 states have call predecessors, (815), 696 states have call successors, (815) [2022-11-22 02:53:33,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3779 states to 3779 states and 5782 transitions. [2022-11-22 02:53:33,295 INFO L78 Accepts]: Start accepts. Automaton has 3779 states and 5782 transitions. Word has length 188 [2022-11-22 02:53:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:53:33,296 INFO L495 AbstractCegarLoop]: Abstraction has 3779 states and 5782 transitions. [2022-11-22 02:53:33,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 10.15) internal successors, (203), 22 states have internal predecessors, (203), 14 states have call successors, (66), 8 states have call predecessors, (66), 9 states have return successors, (64), 15 states have call predecessors, (64), 13 states have call successors, (64) [2022-11-22 02:53:33,296 INFO L276 IsEmpty]: Start isEmpty. Operand 3779 states and 5782 transitions. [2022-11-22 02:53:33,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-11-22 02:53:33,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:53:33,324 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:53:33,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-22 02:53:33,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 02:53:33,532 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:53:33,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:53:33,533 INFO L85 PathProgramCache]: Analyzing trace with hash 514516799, now seen corresponding path program 1 times [2022-11-22 02:53:33,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:53:33,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009445289] [2022-11-22 02:53:33,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:53:33,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:53:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:53:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-11-22 02:53:34,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:53:34,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009445289] [2022-11-22 02:53:34,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009445289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:53:34,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265866573] [2022-11-22 02:53:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:53:34,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:53:34,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:53:34,118 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:53:34,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:53:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:53:34,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 2065 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:53:34,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:53:34,908 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 98 proven. 18 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-11-22 02:53:34,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:53:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-11-22 02:53:35,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265866573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:53:35,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [27669576] [2022-11-22 02:53:35,380 INFO L159 IcfgInterpreter]: Started Sifa with 114 locations of interest [2022-11-22 02:53:35,380 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:53:35,381 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:53:35,382 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:53:35,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:53:41,294 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2022-11-22 02:53:52,399 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 38 for LOIs [2022-11-22 02:53:52,482 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 51 for LOIs [2022-11-22 02:53:52,554 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 50 for LOIs [2022-11-22 02:53:52,739 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 28 for LOIs [2022-11-22 02:53:52,797 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 24 for LOIs [2022-11-22 02:53:52,804 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 62 for LOIs [2022-11-22 02:53:52,817 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 51 for LOIs [2022-11-22 02:53:52,823 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-22 02:53:56,257 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-22 02:53:56,819 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 48 for LOIs [2022-11-22 02:53:56,894 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2022-11-22 02:53:56,902 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-22 02:53:57,051 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:54:19,908 WARN L233 SmtUtils]: Spent 7.41s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:54:27,456 WARN L233 SmtUtils]: Spent 7.17s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:54:36,415 WARN L233 SmtUtils]: Spent 5.41s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:54:49,273 WARN L233 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 659 DAG size of output: 562 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:55:26,830 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '55664#(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 [2022-11-22 02:55:26,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:55:26,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:55:26,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-11-22 02:55:26,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286644224] [2022-11-22 02:55:26,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:55:26,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 02:55:26,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:55:26,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 02:55:26,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1138, Invalid=12202, Unknown=0, NotChecked=0, Total=13340 [2022-11-22 02:55:26,834 INFO L87 Difference]: Start difference. First operand 3779 states and 5782 transitions. Second operand has 25 states, 19 states have (on average 10.210526315789474) internal successors, (194), 22 states have internal predecessors, (194), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) [2022-11-22 02:55:33,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:55:33,070 INFO L93 Difference]: Finished difference Result 7497 states and 11445 transitions. [2022-11-22 02:55:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-22 02:55:33,071 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 10.210526315789474) internal successors, (194), 22 states have internal predecessors, (194), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) Word has length 246 [2022-11-22 02:55:33,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:55:33,099 INFO L225 Difference]: With dead ends: 7497 [2022-11-22 02:55:33,099 INFO L226 Difference]: Without dead ends: 4773 [2022-11-22 02:55:33,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 630 SyntacticMatches, 17 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7205 ImplicationChecksByTransitivity, 91.2s TimeCoverageRelationStatistics Valid=1479, Invalid=17153, Unknown=0, NotChecked=0, Total=18632 [2022-11-22 02:55:33,117 INFO L413 NwaCegarLoop]: 1007 mSDtfsCounter, 2597 mSDsluCounter, 8314 mSDsCounter, 0 mSdLazyCounter, 6038 mSolverCounterSat, 1679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2618 SdHoareTripleChecker+Valid, 9321 SdHoareTripleChecker+Invalid, 7717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1679 IncrementalHoareTripleChecker+Valid, 6038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:55:33,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2618 Valid, 9321 Invalid, 7717 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1679 Valid, 6038 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-22 02:55:33,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4773 states. [2022-11-22 02:55:33,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4773 to 4649. [2022-11-22 02:55:33,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4649 states, 3408 states have (on average 1.4838615023474178) internal successors, (5057), 3491 states have internal predecessors, (5057), 859 states have call successors, (859), 392 states have call predecessors, (859), 381 states have return successors, (1054), 825 states have call predecessors, (1054), 849 states have call successors, (1054) [2022-11-22 02:55:33,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4649 states to 4649 states and 6970 transitions. [2022-11-22 02:55:33,541 INFO L78 Accepts]: Start accepts. Automaton has 4649 states and 6970 transitions. Word has length 246 [2022-11-22 02:55:33,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:55:33,544 INFO L495 AbstractCegarLoop]: Abstraction has 4649 states and 6970 transitions. [2022-11-22 02:55:33,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 10.210526315789474) internal successors, (194), 22 states have internal predecessors, (194), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) [2022-11-22 02:55:33,545 INFO L276 IsEmpty]: Start isEmpty. Operand 4649 states and 6970 transitions. [2022-11-22 02:55:33,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-11-22 02:55:33,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:55:33,587 INFO L195 NwaCegarLoop]: trace histogram [15, 11, 11, 11, 11, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:55:33,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-22 02:55:33,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:55:33,797 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:55:33,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:55:33,797 INFO L85 PathProgramCache]: Analyzing trace with hash 313819284, now seen corresponding path program 1 times [2022-11-22 02:55:33,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:55:33,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366861137] [2022-11-22 02:55:33,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:55:33,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:55:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:55:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2022-11-22 02:55:34,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:55:34,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366861137] [2022-11-22 02:55:34,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366861137] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:55:34,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143584449] [2022-11-22 02:55:34,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:55:34,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:55:34,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:55:34,634 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:55:34,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:55:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:55:35,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 2982 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:55:35,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:55:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 120 proven. 44 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2022-11-22 02:55:35,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:55:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2022-11-22 02:55:36,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143584449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:55:36,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [360918606] [2022-11-22 02:55:36,171 INFO L159 IcfgInterpreter]: Started Sifa with 129 locations of interest [2022-11-22 02:55:36,172 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:55:36,172 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:55:36,172 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:55:36,173 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:55:43,921 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 555 for LOIs [2022-11-22 02:55:44,355 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 21 for LOIs [2022-11-22 02:55:48,932 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 32 for LOIs [2022-11-22 02:55:49,102 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 42 for LOIs [2022-11-22 02:55:49,161 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 80 for LOIs [2022-11-22 02:55:49,498 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 45 for LOIs [2022-11-22 02:55:49,605 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 21 for LOIs [2022-11-22 02:55:49,614 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 54 for LOIs [2022-11-22 02:55:49,628 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 42 for LOIs [2022-11-22 02:55:49,632 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-22 02:55:53,108 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 34 for LOIs [2022-11-22 02:55:53,177 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 32 for LOIs [2022-11-22 02:55:53,180 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 508 for LOIs [2022-11-22 02:55:55,792 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 778 for LOIs [2022-11-22 02:56:04,827 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 631 for LOIs [2022-11-22 02:56:05,268 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:56:23,893 WARN L233 SmtUtils]: Spent 9.75s on a formula simplification. DAG size of input: 631 DAG size of output: 508 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:56:34,481 WARN L233 SmtUtils]: Spent 10.13s on a formula simplification. DAG size of input: 671 DAG size of output: 522 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:56:42,221 WARN L233 SmtUtils]: Spent 7.33s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:56:49,990 WARN L233 SmtUtils]: Spent 7.32s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:56:59,602 WARN L233 SmtUtils]: Spent 9.03s on a formula simplification. DAG size of input: 778 DAG size of output: 644 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:57:16,714 WARN L233 SmtUtils]: Spent 16.41s 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) [2022-11-22 02:58:25,075 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '74714#(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 [2022-11-22 02:58:25,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:58:25,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:58:25,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-11-22 02:58:25,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002506362] [2022-11-22 02:58:25,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:58:25,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 02:58:25,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:58:25,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 02:58:25,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1084, Invalid=14168, Unknown=0, NotChecked=0, Total=15252 [2022-11-22 02:58:25,080 INFO L87 Difference]: Start difference. First operand 4649 states and 6970 transitions. Second operand has 25 states, 21 states have (on average 11.19047619047619) internal successors, (235), 23 states have internal predecessors, (235), 12 states have call successors, (85), 7 states have call predecessors, (85), 12 states have return successors, (80), 12 states have call predecessors, (80), 12 states have call successors, (80) [2022-11-22 02:59:01,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:59:01,503 INFO L93 Difference]: Finished difference Result 18072 states and 27893 transitions. [2022-11-22 02:59:01,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-11-22 02:59:01,504 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 11.19047619047619) internal successors, (235), 23 states have internal predecessors, (235), 12 states have call successors, (85), 7 states have call predecessors, (85), 12 states have return successors, (80), 12 states have call predecessors, (80), 12 states have call successors, (80) Word has length 325 [2022-11-22 02:59:01,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:59:01,577 INFO L225 Difference]: With dead ends: 18072 [2022-11-22 02:59:01,578 INFO L226 Difference]: Without dead ends: 10683 [2022-11-22 02:59:01,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1221 GetRequests, 899 SyntacticMatches, 42 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33909 ImplicationChecksByTransitivity, 149.1s TimeCoverageRelationStatistics Valid=4824, Invalid=74418, Unknown=0, NotChecked=0, Total=79242 [2022-11-22 02:59:01,621 INFO L413 NwaCegarLoop]: 826 mSDtfsCounter, 7342 mSDsluCounter, 8389 mSDsCounter, 0 mSdLazyCounter, 34607 mSolverCounterSat, 9493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7351 SdHoareTripleChecker+Valid, 9215 SdHoareTripleChecker+Invalid, 44100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 9493 IncrementalHoareTripleChecker+Valid, 34607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:59:01,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7351 Valid, 9215 Invalid, 44100 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [9493 Valid, 34607 Invalid, 0 Unknown, 0 Unchecked, 24.9s Time] [2022-11-22 02:59:01,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10683 states. [2022-11-22 02:59:02,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10683 to 9851. [2022-11-22 02:59:02,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9851 states, 7232 states have (on average 1.4521570796460177) internal successors, (10502), 7386 states have internal predecessors, (10502), 1783 states have call successors, (1783), 841 states have call predecessors, (1783), 835 states have return successors, (2496), 1719 states have call predecessors, (2496), 1770 states have call successors, (2496) [2022-11-22 02:59:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9851 states to 9851 states and 14781 transitions. [2022-11-22 02:59:02,751 INFO L78 Accepts]: Start accepts. Automaton has 9851 states and 14781 transitions. Word has length 325 [2022-11-22 02:59:02,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:59:02,752 INFO L495 AbstractCegarLoop]: Abstraction has 9851 states and 14781 transitions. [2022-11-22 02:59:02,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 11.19047619047619) internal successors, (235), 23 states have internal predecessors, (235), 12 states have call successors, (85), 7 states have call predecessors, (85), 12 states have return successors, (80), 12 states have call predecessors, (80), 12 states have call successors, (80) [2022-11-22 02:59:02,753 INFO L276 IsEmpty]: Start isEmpty. Operand 9851 states and 14781 transitions. [2022-11-22 02:59:02,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-11-22 02:59:02,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:59:02,827 INFO L195 NwaCegarLoop]: trace histogram [13, 11, 11, 11, 11, 6, 6, 6, 6, 6, 6, 5, 5, 5, 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, 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] [2022-11-22 02:59:02,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:59:03,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 02:59:03,044 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:59:03,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:59:03,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1725458643, now seen corresponding path program 1 times [2022-11-22 02:59:03,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:59:03,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20826848] [2022-11-22 02:59:03,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:59:03,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:59:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:59:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 51 proven. 56 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-22 02:59:04,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:59:04,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20826848] [2022-11-22 02:59:04,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20826848] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:59:04,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109034868] [2022-11-22 02:59:04,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:59:04,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:59:04,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:59:04,444 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:59:04,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5559f9f4-1101-4991-8ed8-8b99b484bea3/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:59:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:59:05,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 2977 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:59:05,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:59:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 129 proven. 32 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2022-11-22 02:59:05,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:59:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 40 proven. 31 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2022-11-22 02:59:06,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109034868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:59:06,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1390272258] [2022-11-22 02:59:06,005 INFO L159 IcfgInterpreter]: Started Sifa with 127 locations of interest [2022-11-22 02:59:06,005 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:59:06,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:59:06,006 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:59:06,007 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:59:13,203 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 555 for LOIs [2022-11-22 02:59:13,621 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 21 for LOIs [2022-11-22 02:59:15,673 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 32 for LOIs [2022-11-22 02:59:15,810 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 42 for LOIs [2022-11-22 02:59:15,855 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 80 for LOIs [2022-11-22 02:59:16,023 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 45 for LOIs [2022-11-22 02:59:16,137 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 21 for LOIs [2022-11-22 02:59:16,144 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 66 for LOIs [2022-11-22 02:59:16,157 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 42 for LOIs [2022-11-22 02:59:16,164 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-22 02:59:19,836 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 52 for LOIs [2022-11-22 02:59:19,912 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 48 for LOIs [2022-11-22 02:59:19,917 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 508 for LOIs [2022-11-22 02:59:22,067 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 778 for LOIs [2022-11-22 02:59:43,149 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 631 for LOIs [2022-11-22 02:59:43,681 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 03:00:01,954 WARN L233 SmtUtils]: Spent 9.67s on a formula simplification. DAG size of input: 631 DAG size of output: 508 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 03:00:12,397 WARN L233 SmtUtils]: Spent 9.98s on a formula simplification. DAG size of input: 671 DAG size of output: 522 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 03:00:20,069 WARN L233 SmtUtils]: Spent 7.26s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 03:00:27,748 WARN L233 SmtUtils]: Spent 7.25s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 03:00:37,292 WARN L233 SmtUtils]: Spent 8.96s on a formula simplification. DAG size of input: 778 DAG size of output: 644 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 03:01:02,472 WARN L233 SmtUtils]: Spent 23.87s on a formula simplification. DAG size of input: 858 DAG size of output: 648 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)