./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cb2818f0d8bce3a3c55c338823c603b0097898f29d2ecfaf46bb61225da928d8 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:30:26,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:30:26,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:30:26,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:30:26,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:30:26,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:30:26,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:30:26,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:30:26,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:30:26,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:30:26,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:30:26,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:30:26,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:30:26,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:30:26,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:30:26,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:30:26,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:30:26,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:30:26,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:30:26,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:30:26,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:30:26,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:30:26,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:30:26,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:30:26,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:30:26,831 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:30:26,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:30:26,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:30:26,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:30:26,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:30:26,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:30:26,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:30:26,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:30:26,839 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:30:26,841 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:30:26,841 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:30:26,842 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:30:26,842 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:30:26,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:30:26,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:30:26,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:30:26,846 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:30:26,872 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:30:26,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:30:26,873 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:30:26,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:30:26,874 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:30:26,874 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:30:26,874 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:30:26,874 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:30:26,875 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:30:26,875 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:30:26,875 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:30:26,875 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:30:26,876 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:30:26,876 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:30:26,876 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:30:26,876 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:30:26,877 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:30:26,877 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:30:26,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:30:26,878 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:30:26,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:30:26,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:30:26,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:30:26,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:30:26,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:30:26,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:30:26,879 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:30:26,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:30:26,880 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:30:26,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:30:26,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:30:26,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:30:26,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:30:26,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:30:26,881 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:30:26,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:30:26,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:30:26,882 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:30:26,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:30:26,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:30:26,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:30:26,883 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_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb2818f0d8bce3a3c55c338823c603b0097898f29d2ecfaf46bb61225da928d8 [2022-11-25 23:30:27,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:30:27,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:30:27,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:30:27,195 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:30:27,195 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:30:27,197 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c [2022-11-25 23:30:30,447 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:30:30,940 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:30:30,942 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c [2022-11-25 23:30:30,972 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/data/ee37ca7ca/1e9dd3e6a2584414a94d37d33dbc4855/FLAGad8810a9c [2022-11-25 23:30:30,998 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/data/ee37ca7ca/1e9dd3e6a2584414a94d37d33dbc4855 [2022-11-25 23:30:31,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:30:31,008 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:30:31,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:30:31,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:30:31,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:30:31,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:30:31" (1/1) ... [2022-11-25 23:30:31,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f2e4ff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:31, skipping insertion in model container [2022-11-25 23:30:31,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:30:31" (1/1) ... [2022-11-25 23:30:31,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:30:31,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:30:31,765 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_da68ef29-9bf8-4f33-8cb9-2c88156806d0/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c[73221,73234] [2022-11-25 23:30:31,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:30:31,786 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:30:31,920 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_da68ef29-9bf8-4f33-8cb9-2c88156806d0/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c[73221,73234] [2022-11-25 23:30:31,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:30:31,952 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:30:31,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:31 WrapperNode [2022-11-25 23:30:31,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:30:31,954 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:30:31,954 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:30:31,955 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:30:31,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:31" (1/1) ... [2022-11-25 23:30:31,997 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:31" (1/1) ... [2022-11-25 23:30:32,071 INFO L138 Inliner]: procedures = 95, calls = 354, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 1156 [2022-11-25 23:30:32,080 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:30:32,087 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:30:32,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:30:32,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:30:32,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:31" (1/1) ... [2022-11-25 23:30:32,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:31" (1/1) ... [2022-11-25 23:30:32,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:31" (1/1) ... [2022-11-25 23:30:32,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:31" (1/1) ... [2022-11-25 23:30:32,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:31" (1/1) ... [2022-11-25 23:30:32,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:31" (1/1) ... [2022-11-25 23:30:32,164 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:31" (1/1) ... [2022-11-25 23:30:32,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:31" (1/1) ... [2022-11-25 23:30:32,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:30:32,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:30:32,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:30:32,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:30:32,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:31" (1/1) ... [2022-11-25 23:30:32,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:30:32,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:30:32,244 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:30:32,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:30:32,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:30:32,307 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-25 23:30:32,308 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-25 23:30:32,308 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-25 23:30:32,308 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-25 23:30:32,308 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-25 23:30:32,309 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-25 23:30:32,309 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-25 23:30:32,309 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-25 23:30:32,309 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-25 23:30:32,309 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-25 23:30:32,309 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-25 23:30:32,310 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-25 23:30:32,310 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-25 23:30:32,310 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-25 23:30:32,310 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-25 23:30:32,310 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-25 23:30:32,311 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-25 23:30:32,311 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-25 23:30:32,311 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-25 23:30:32,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-25 23:30:32,311 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-25 23:30:32,312 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-25 23:30:32,313 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-25 23:30:32,313 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-25 23:30:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-25 23:30:32,314 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-25 23:30:32,315 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-25 23:30:32,315 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-25 23:30:32,315 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-25 23:30:32,317 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-25 23:30:32,318 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-25 23:30:32,318 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-25 23:30:32,318 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-25 23:30:32,319 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-25 23:30:32,319 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-25 23:30:32,319 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-25 23:30:32,319 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-25 23:30:32,319 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-25 23:30:32,320 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-25 23:30:32,320 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-25 23:30:32,320 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-25 23:30:32,320 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-25 23:30:32,321 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-25 23:30:32,321 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-25 23:30:32,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:30:32,322 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-25 23:30:32,322 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-25 23:30:32,322 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-25 23:30:32,323 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-25 23:30:32,324 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-25 23:30:32,324 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-25 23:30:32,324 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-25 23:30:32,325 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-25 23:30:32,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:30:32,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:30:32,325 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-25 23:30:32,325 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-25 23:30:32,326 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-25 23:30:32,326 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-25 23:30:32,584 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:30:32,587 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:30:34,206 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:30:35,100 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:30:35,101 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 23:30:35,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:30:35 BoogieIcfgContainer [2022-11-25 23:30:35,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:30:35,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:30:35,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:30:35,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:30:35,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:30:31" (1/3) ... [2022-11-25 23:30:35,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f1449a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:30:35, skipping insertion in model container [2022-11-25 23:30:35,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:31" (2/3) ... [2022-11-25 23:30:35,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f1449a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:30:35, skipping insertion in model container [2022-11-25 23:30:35,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:30:35" (3/3) ... [2022-11-25 23:30:35,121 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product28.cil.c [2022-11-25 23:30:35,146 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:30:35,147 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:30:35,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:30:35,267 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;@1004f87c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:30:35,268 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:30:35,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 417 states, 277 states have (on average 1.5667870036101084) internal successors, (434), 297 states have internal predecessors, (434), 110 states have call successors, (110), 28 states have call predecessors, (110), 28 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) [2022-11-25 23:30:35,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 23:30:35,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:35,298 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:35,299 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:30:35,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:35,309 INFO L85 PathProgramCache]: Analyzing trace with hash -707800898, now seen corresponding path program 1 times [2022-11-25 23:30:35,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:35,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203598910] [2022-11-25 23:30:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:35,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:30:36,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:36,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203598910] [2022-11-25 23:30:36,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203598910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:36,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:36,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:30:36,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402007965] [2022-11-25 23:30:36,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:36,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:30:36,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:36,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:30:36,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:30:36,557 INFO L87 Difference]: Start difference. First operand has 417 states, 277 states have (on average 1.5667870036101084) internal successors, (434), 297 states have internal predecessors, (434), 110 states have call successors, (110), 28 states have call predecessors, (110), 28 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 23:30:37,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:37,068 INFO L93 Difference]: Finished difference Result 1223 states and 1951 transitions. [2022-11-25 23:30:37,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:30:37,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2022-11-25 23:30:37,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:37,095 INFO L225 Difference]: With dead ends: 1223 [2022-11-25 23:30:37,095 INFO L226 Difference]: Without dead ends: 808 [2022-11-25 23:30:37,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:30:37,108 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 617 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:37,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 1355 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:30:37,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-11-25 23:30:37,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 770. [2022-11-25 23:30:37,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 529 states have (on average 1.5689981096408319) internal successors, (830), 556 states have internal predecessors, (830), 194 states have call successors, (194), 49 states have call predecessors, (194), 46 states have return successors, (197), 179 states have call predecessors, (197), 190 states have call successors, (197) [2022-11-25 23:30:37,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1221 transitions. [2022-11-25 23:30:37,254 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1221 transitions. Word has length 50 [2022-11-25 23:30:37,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:37,255 INFO L495 AbstractCegarLoop]: Abstraction has 770 states and 1221 transitions. [2022-11-25 23:30:37,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 23:30:37,256 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1221 transitions. [2022-11-25 23:30:37,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-25 23:30:37,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:37,264 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:37,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:30:37,265 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:30:37,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:37,265 INFO L85 PathProgramCache]: Analyzing trace with hash -219053011, now seen corresponding path program 1 times [2022-11-25 23:30:37,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:37,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858050088] [2022-11-25 23:30:37,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:37,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:37,970 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 23:30:37,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:37,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858050088] [2022-11-25 23:30:37,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858050088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:37,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:37,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:30:37,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892013570] [2022-11-25 23:30:37,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:37,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:30:37,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:37,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:30:37,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:30:37,976 INFO L87 Difference]: Start difference. First operand 770 states and 1221 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-25 23:30:39,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:39,377 INFO L93 Difference]: Finished difference Result 2002 states and 3268 transitions. [2022-11-25 23:30:39,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:30:39,378 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 94 [2022-11-25 23:30:39,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:39,400 INFO L225 Difference]: With dead ends: 2002 [2022-11-25 23:30:39,401 INFO L226 Difference]: Without dead ends: 1244 [2022-11-25 23:30:39,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:30:39,417 INFO L413 NwaCegarLoop]: 791 mSDtfsCounter, 673 mSDsluCounter, 2729 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 3520 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:39,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 3520 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 23:30:39,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2022-11-25 23:30:39,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 1127. [2022-11-25 23:30:39,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 777 states have (on average 1.5637065637065637) internal successors, (1215), 820 states have internal predecessors, (1215), 281 states have call successors, (281), 72 states have call predecessors, (281), 68 states have return successors, (304), 257 states have call predecessors, (304), 276 states have call successors, (304) [2022-11-25 23:30:39,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1800 transitions. [2022-11-25 23:30:39,532 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1800 transitions. Word has length 94 [2022-11-25 23:30:39,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:39,533 INFO L495 AbstractCegarLoop]: Abstraction has 1127 states and 1800 transitions. [2022-11-25 23:30:39,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-25 23:30:39,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1800 transitions. [2022-11-25 23:30:39,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-25 23:30:39,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:39,539 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:39,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:30:39,540 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:30:39,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:39,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1536939791, now seen corresponding path program 1 times [2022-11-25 23:30:39,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:39,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2870467] [2022-11-25 23:30:39,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:39,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:30:40,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:40,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2870467] [2022-11-25 23:30:40,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2870467] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:30:40,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092472641] [2022-11-25 23:30:40,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:40,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:40,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:30:40,099 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:30:40,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:30:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:40,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 1809 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:30:40,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:30:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:30:40,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:30:40,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092472641] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:40,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:30:40,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 23:30:40,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240056922] [2022-11-25 23:30:40,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:40,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:30:40,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:40,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:30:40,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:30:40,767 INFO L87 Difference]: Start difference. First operand 1127 states and 1800 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-25 23:30:41,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:41,191 INFO L93 Difference]: Finished difference Result 3208 states and 5234 transitions. [2022-11-25 23:30:41,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:30:41,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 93 [2022-11-25 23:30:41,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:41,218 INFO L225 Difference]: With dead ends: 3208 [2022-11-25 23:30:41,218 INFO L226 Difference]: Without dead ends: 2093 [2022-11-25 23:30:41,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:30:41,234 INFO L413 NwaCegarLoop]: 1079 mSDtfsCounter, 571 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:41,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 1594 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:30:41,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2022-11-25 23:30:41,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2038. [2022-11-25 23:30:41,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2038 states, 1416 states have (on average 1.573446327683616) internal successors, (2228), 1502 states have internal predecessors, (2228), 493 states have call successors, (493), 129 states have call predecessors, (493), 128 states have return successors, (557), 452 states have call predecessors, (557), 488 states have call successors, (557) [2022-11-25 23:30:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 3278 transitions. [2022-11-25 23:30:41,414 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 3278 transitions. Word has length 93 [2022-11-25 23:30:41,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:41,415 INFO L495 AbstractCegarLoop]: Abstraction has 2038 states and 3278 transitions. [2022-11-25 23:30:41,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-25 23:30:41,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 3278 transitions. [2022-11-25 23:30:41,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-25 23:30:41,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:41,420 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:41,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:30:41,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:41,628 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:30:41,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:41,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1602393416, now seen corresponding path program 1 times [2022-11-25 23:30:41,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:41,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865803190] [2022-11-25 23:30:41,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:41,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:30:42,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:42,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865803190] [2022-11-25 23:30:42,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865803190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:30:42,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482552056] [2022-11-25 23:30:42,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:42,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:42,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:30:42,031 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:30:42,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:30:42,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:42,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 1822 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:30:42,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:30:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:30:42,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:30:42,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482552056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:42,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:30:42,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 23:30:42,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892361265] [2022-11-25 23:30:42,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:42,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:30:42,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:42,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:30:42,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:30:42,501 INFO L87 Difference]: Start difference. First operand 2038 states and 3278 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 23:30:42,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:42,780 INFO L93 Difference]: Finished difference Result 4152 states and 6782 transitions. [2022-11-25 23:30:42,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:30:42,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 95 [2022-11-25 23:30:42,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:42,802 INFO L225 Difference]: With dead ends: 4152 [2022-11-25 23:30:42,802 INFO L226 Difference]: Without dead ends: 2126 [2022-11-25 23:30:42,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:30:42,821 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 33 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:42,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1202 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:30:42,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2022-11-25 23:30:42,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 2080. [2022-11-25 23:30:42,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 1452 states have (on average 1.5633608815426998) internal successors, (2270), 1538 states have internal predecessors, (2270), 499 states have call successors, (499), 129 states have call predecessors, (499), 128 states have return successors, (563), 458 states have call predecessors, (563), 494 states have call successors, (563) [2022-11-25 23:30:43,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 3332 transitions. [2022-11-25 23:30:43,005 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 3332 transitions. Word has length 95 [2022-11-25 23:30:43,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:43,006 INFO L495 AbstractCegarLoop]: Abstraction has 2080 states and 3332 transitions. [2022-11-25 23:30:43,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 23:30:43,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 3332 transitions. [2022-11-25 23:30:43,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-25 23:30:43,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:43,010 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:43,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:30:43,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:43,219 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:30:43,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:43,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1203754772, now seen corresponding path program 1 times [2022-11-25 23:30:43,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:43,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924690733] [2022-11-25 23:30:43,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:43,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:30:43,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:43,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924690733] [2022-11-25 23:30:43,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924690733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:30:43,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79819157] [2022-11-25 23:30:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:43,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:43,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:30:43,582 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:30:43,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:30:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:44,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 1810 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:30:44,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:30:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:30:44,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:30:44,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79819157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:44,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:30:44,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 23:30:44,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863293894] [2022-11-25 23:30:44,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:44,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:30:44,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:44,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:30:44,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:30:44,240 INFO L87 Difference]: Start difference. First operand 2080 states and 3332 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-25 23:30:44,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:44,622 INFO L93 Difference]: Finished difference Result 5114 states and 8320 transitions. [2022-11-25 23:30:44,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:30:44,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 93 [2022-11-25 23:30:44,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:44,663 INFO L225 Difference]: With dead ends: 5114 [2022-11-25 23:30:44,663 INFO L226 Difference]: Without dead ends: 3046 [2022-11-25 23:30:44,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:30:44,683 INFO L413 NwaCegarLoop]: 1040 mSDtfsCounter, 572 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:44,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 1555 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:30:44,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2022-11-25 23:30:44,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 2979. [2022-11-25 23:30:44,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2979 states, 2085 states have (on average 1.5688249400479617) internal successors, (3271), 2214 states have internal predecessors, (3271), 708 states have call successors, (708), 183 states have call predecessors, (708), 185 states have return successors, (813), 650 states have call predecessors, (813), 703 states have call successors, (813) [2022-11-25 23:30:44,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 4792 transitions. [2022-11-25 23:30:44,922 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 4792 transitions. Word has length 93 [2022-11-25 23:30:44,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:44,923 INFO L495 AbstractCegarLoop]: Abstraction has 2979 states and 4792 transitions. [2022-11-25 23:30:44,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-25 23:30:44,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 4792 transitions. [2022-11-25 23:30:44,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-25 23:30:44,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:44,935 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:44,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:30:45,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:45,145 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:30:45,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:45,146 INFO L85 PathProgramCache]: Analyzing trace with hash 979137355, now seen corresponding path program 1 times [2022-11-25 23:30:45,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:45,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139561523] [2022-11-25 23:30:45,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:45,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 23:30:45,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:45,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139561523] [2022-11-25 23:30:45,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139561523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:30:45,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707398027] [2022-11-25 23:30:45,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:45,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:45,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:30:45,600 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:30:45,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:30:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:46,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 1823 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:30:46,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:30:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:30:46,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:30:46,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707398027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:46,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:30:46,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-25 23:30:46,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739646871] [2022-11-25 23:30:46,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:46,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:30:46,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:46,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:30:46,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:30:46,250 INFO L87 Difference]: Start difference. First operand 2979 states and 4792 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-25 23:30:47,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:47,745 INFO L93 Difference]: Finished difference Result 8000 states and 13139 transitions. [2022-11-25 23:30:47,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:30:47,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 95 [2022-11-25 23:30:47,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:47,798 INFO L225 Difference]: With dead ends: 8000 [2022-11-25 23:30:47,798 INFO L226 Difference]: Without dead ends: 5033 [2022-11-25 23:30:47,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:30:47,831 INFO L413 NwaCegarLoop]: 706 mSDtfsCounter, 537 mSDsluCounter, 2186 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 2892 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:47,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 2892 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 23:30:47,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5033 states. [2022-11-25 23:30:48,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5033 to 4999. [2022-11-25 23:30:48,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4999 states, 3485 states have (on average 1.50961262553802) internal successors, (5261), 3720 states have internal predecessors, (5261), 1187 states have call successors, (1187), 327 states have call predecessors, (1187), 326 states have return successors, (1467), 1064 states have call predecessors, (1467), 1179 states have call successors, (1467) [2022-11-25 23:30:48,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4999 states to 4999 states and 7915 transitions. [2022-11-25 23:30:48,350 INFO L78 Accepts]: Start accepts. Automaton has 4999 states and 7915 transitions. Word has length 95 [2022-11-25 23:30:48,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:48,350 INFO L495 AbstractCegarLoop]: Abstraction has 4999 states and 7915 transitions. [2022-11-25 23:30:48,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-25 23:30:48,351 INFO L276 IsEmpty]: Start isEmpty. Operand 4999 states and 7915 transitions. [2022-11-25 23:30:48,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-25 23:30:48,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:48,355 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 23:30:48,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:30:48,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:48,566 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:30:48,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:48,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1123454945, now seen corresponding path program 1 times [2022-11-25 23:30:48,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:48,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941582333] [2022-11-25 23:30:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:48,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:49,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 23:30:49,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:49,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941582333] [2022-11-25 23:30:49,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941582333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:30:49,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837287036] [2022-11-25 23:30:49,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:49,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:49,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:30:49,596 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:30:49,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:30:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:50,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:30:50,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:30:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:30:50,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:30:50,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837287036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:50,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:30:50,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2022-11-25 23:30:50,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135975769] [2022-11-25 23:30:50,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:50,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:30:50,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:50,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:30:50,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:30:50,230 INFO L87 Difference]: Start difference. First operand 4999 states and 7915 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-25 23:30:50,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:50,897 INFO L93 Difference]: Finished difference Result 11148 states and 17695 transitions. [2022-11-25 23:30:50,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:30:50,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2022-11-25 23:30:50,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:50,954 INFO L225 Difference]: With dead ends: 11148 [2022-11-25 23:30:50,955 INFO L226 Difference]: Without dead ends: 6161 [2022-11-25 23:30:51,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:30:51,003 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 432 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:51,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 1797 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:30:51,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2022-11-25 23:30:51,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 5967. [2022-11-25 23:30:51,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5967 states, 4138 states have (on average 1.4693088448525857) internal successors, (6080), 4367 states have internal predecessors, (6080), 1376 states have call successors, (1376), 432 states have call predecessors, (1376), 452 states have return successors, (1763), 1273 states have call predecessors, (1763), 1365 states have call successors, (1763) [2022-11-25 23:30:51,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5967 states to 5967 states and 9219 transitions. [2022-11-25 23:30:51,611 INFO L78 Accepts]: Start accepts. Automaton has 5967 states and 9219 transitions. Word has length 99 [2022-11-25 23:30:51,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:51,612 INFO L495 AbstractCegarLoop]: Abstraction has 5967 states and 9219 transitions. [2022-11-25 23:30:51,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-25 23:30:51,613 INFO L276 IsEmpty]: Start isEmpty. Operand 5967 states and 9219 transitions. [2022-11-25 23:30:51,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-25 23:30:51,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:51,618 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 23:30:51,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:30:51,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:51,843 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:30:51,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:51,844 INFO L85 PathProgramCache]: Analyzing trace with hash 2012415330, now seen corresponding path program 1 times [2022-11-25 23:30:51,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:51,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698540732] [2022-11-25 23:30:51,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:51,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 23:30:52,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:52,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698540732] [2022-11-25 23:30:52,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698540732] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:30:52,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389362986] [2022-11-25 23:30:52,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:52,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:52,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:30:52,571 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:30:52,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:30:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:53,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:30:53,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:30:53,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:30:53,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:30:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 23:30:54,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389362986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:30:54,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [274205024] [2022-11-25 23:30:54,153 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2022-11-25 23:30:54,154 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:30:54,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:30:54,166 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:30:54,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:31:01,764 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-11-25 23:31:09,916 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 511 for LOIs [2022-11-25 23:31:10,312 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-11-25 23:31:12,757 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-11-25 23:31:12,974 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-11-25 23:31:13,052 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-11-25 23:31:13,132 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-11-25 23:31:16,954 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-11-25 23:31:17,669 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-11-25 23:31:17,833 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:31:53,847 WARN L233 SmtUtils]: Spent 7.30s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:32:01,750 WARN L233 SmtUtils]: Spent 7.51s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:32:11,220 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 780 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:32:31,491 WARN L233 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 622 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:32:38,487 WARN L233 SmtUtils]: Spent 6.50s on a formula simplification. DAG size of input: 624 DAG size of output: 597 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:32:47,310 WARN L233 SmtUtils]: Spent 6.31s on a formula simplification. DAG size of input: 630 DAG size of output: 601 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:32:53,960 WARN L233 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 630 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:33:04,603 WARN L233 SmtUtils]: Spent 10.10s on a formula simplification. DAG size of input: 511 DAG size of output: 450 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:33:15,759 WARN L233 SmtUtils]: Spent 10.58s on a formula simplification. DAG size of input: 547 DAG size of output: 458 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:33:22,881 WARN L233 SmtUtils]: Spent 6.54s on a formula simplification. DAG size of input: 634 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:33:30,187 WARN L233 SmtUtils]: Spent 6.68s on a formula simplification. DAG size of input: 632 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:33:38,842 WARN L233 SmtUtils]: Spent 6.70s on a formula simplification. DAG size of input: 637 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:33:46,083 WARN L233 SmtUtils]: Spent 6.58s on a formula simplification. DAG size of input: 635 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:33:46,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [274205024] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:33:46,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:33:46,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 8, 10] total 51 [2022-11-25 23:33:46,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162180344] [2022-11-25 23:33:46,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:33:46,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 23:33:46,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:46,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 23:33:46,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2022-11-25 23:33:46,097 INFO L87 Difference]: Start difference. First operand 5967 states and 9219 transitions. Second operand has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2022-11-25 23:33:53,321 WARN L233 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 618 DAG size of output: 583 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:34:00,821 WARN L233 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 624 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:34:07,756 WARN L233 SmtUtils]: Spent 5.73s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:34:14,048 WARN L233 SmtUtils]: Spent 5.60s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:34:26,022 WARN L233 SmtUtils]: Spent 11.18s on a formula simplification. DAG size of input: 607 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:34:37,879 WARN L233 SmtUtils]: Spent 11.49s on a formula simplification. DAG size of input: 613 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:35:15,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:15,013 INFO L93 Difference]: Finished difference Result 12067 states and 18648 transitions. [2022-11-25 23:35:15,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 23:35:15,014 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) Word has length 100 [2022-11-25 23:35:15,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:15,069 INFO L225 Difference]: With dead ends: 12067 [2022-11-25 23:35:15,069 INFO L226 Difference]: Without dead ends: 6112 [2022-11-25 23:35:15,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 253 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 197.6s TimeCoverageRelationStatistics Valid=460, Invalid=2732, Unknown=0, NotChecked=0, Total=3192 [2022-11-25 23:35:15,099 INFO L413 NwaCegarLoop]: 599 mSDtfsCounter, 273 mSDsluCounter, 3081 mSDsCounter, 0 mSdLazyCounter, 6066 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 3680 SdHoareTripleChecker+Invalid, 6144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 6066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:15,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 3680 Invalid, 6144 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [78 Valid, 6066 Invalid, 0 Unknown, 0 Unchecked, 39.1s Time] [2022-11-25 23:35:15,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6112 states. [2022-11-25 23:35:15,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6112 to 6033. [2022-11-25 23:35:15,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6033 states, 4184 states have (on average 1.465583173996176) internal successors, (6132), 4412 states have internal predecessors, (6132), 1389 states have call successors, (1389), 441 states have call predecessors, (1389), 459 states have return successors, (1777), 1285 states have call predecessors, (1777), 1378 states have call successors, (1777) [2022-11-25 23:35:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6033 states to 6033 states and 9298 transitions. [2022-11-25 23:35:15,815 INFO L78 Accepts]: Start accepts. Automaton has 6033 states and 9298 transitions. Word has length 100 [2022-11-25 23:35:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:15,815 INFO L495 AbstractCegarLoop]: Abstraction has 6033 states and 9298 transitions. [2022-11-25 23:35:15,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2022-11-25 23:35:15,816 INFO L276 IsEmpty]: Start isEmpty. Operand 6033 states and 9298 transitions. [2022-11-25 23:35:15,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-25 23:35:15,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:15,821 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:15,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:35:16,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 23:35:16,031 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:35:16,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:16,031 INFO L85 PathProgramCache]: Analyzing trace with hash -460668467, now seen corresponding path program 1 times [2022-11-25 23:35:16,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:16,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224396080] [2022-11-25 23:35:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:16,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 23:35:16,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:16,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224396080] [2022-11-25 23:35:16,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224396080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:35:16,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857719971] [2022-11-25 23:35:16,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:16,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:16,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:35:16,504 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:35:16,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:35:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:16,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:35:16,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:35:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 23:35:17,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:35:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 23:35:17,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857719971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:35:17,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1737035704] [2022-11-25 23:35:17,616 INFO L159 IcfgInterpreter]: Started Sifa with 91 locations of interest [2022-11-25 23:35:17,616 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:35:17,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:35:17,617 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:35:17,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:35:23,187 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-11-25 23:35:34,201 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 64 for LOIs [2022-11-25 23:35:34,215 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-11-25 23:35:36,821 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-11-25 23:35:37,146 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-11-25 23:35:37,284 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-11-25 23:35:37,422 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-11-25 23:35:41,412 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-11-25 23:35:42,139 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-11-25 23:35:42,307 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:36:19,011 WARN L233 SmtUtils]: Spent 8.16s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:36:27,843 WARN L233 SmtUtils]: Spent 8.45s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:36:37,008 WARN L233 SmtUtils]: Spent 5.60s on a formula simplification. DAG size of input: 780 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:36:57,799 WARN L233 SmtUtils]: Spent 6.42s on a formula simplification. DAG size of input: 622 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:37:04,512 WARN L233 SmtUtils]: Spent 6.31s on a formula simplification. DAG size of input: 624 DAG size of output: 597 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:37:13,899 WARN L233 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 630 DAG size of output: 601 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:37:21,314 WARN L233 SmtUtils]: Spent 6.86s on a formula simplification. DAG size of input: 628 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:37:30,768 WARN L233 SmtUtils]: Spent 7.13s on a formula simplification. DAG size of input: 634 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:37:38,489 WARN L233 SmtUtils]: Spent 7.08s on a formula simplification. DAG size of input: 634 DAG size of output: 603 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:37:47,333 WARN L233 SmtUtils]: Spent 6.98s on a formula simplification. DAG size of input: 637 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:37:55,120 WARN L233 SmtUtils]: Spent 7.11s on a formula simplification. DAG size of input: 637 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:38:03,876 WARN L233 SmtUtils]: Spent 6.72s on a formula simplification. DAG size of input: 640 DAG size of output: 605 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:38:12,074 WARN L233 SmtUtils]: Spent 7.46s on a formula simplification. DAG size of input: 640 DAG size of output: 605 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:38:12,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1737035704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:38:12,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:38:12,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [10, 8, 10] total 50 [2022-11-25 23:38:12,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123559698] [2022-11-25 23:38:12,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:38:12,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 23:38:12,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:38:12,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 23:38:12,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 23:38:12,090 INFO L87 Difference]: Start difference. First operand 6033 states and 9298 transitions. Second operand has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-11-25 23:38:19,462 WARN L233 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 618 DAG size of output: 583 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:38:26,987 WARN L233 SmtUtils]: Spent 7.21s on a formula simplification. DAG size of input: 624 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:38:34,545 WARN L233 SmtUtils]: Spent 6.23s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:38:40,961 WARN L233 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:38:47,953 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 605 DAG size of output: 585 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:38:54,684 WARN L233 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 611 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:39:43,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:39:43,973 INFO L93 Difference]: Finished difference Result 12045 states and 18609 transitions. [2022-11-25 23:39:43,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 23:39:43,975 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) Word has length 106 [2022-11-25 23:39:43,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:39:44,018 INFO L225 Difference]: With dead ends: 12045 [2022-11-25 23:39:44,018 INFO L226 Difference]: Without dead ends: 6102 [2022-11-25 23:39:44,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 268 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 189.2s TimeCoverageRelationStatistics Valid=462, Invalid=2618, Unknown=0, NotChecked=0, Total=3080 [2022-11-25 23:39:44,049 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 146 mSDsluCounter, 4204 mSDsCounter, 0 mSdLazyCounter, 8001 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 4800 SdHoareTripleChecker+Invalid, 8032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 8001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:39:44,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 4800 Invalid, 8032 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [31 Valid, 8001 Invalid, 0 Unknown, 0 Unchecked, 51.9s Time] [2022-11-25 23:39:44,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6102 states. [2022-11-25 23:39:44,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6102 to 6035. [2022-11-25 23:39:44,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6035 states, 4185 states have (on average 1.4652329749103943) internal successors, (6132), 4413 states have internal predecessors, (6132), 1389 states have call successors, (1389), 442 states have call predecessors, (1389), 460 states have return successors, (1777), 1285 states have call predecessors, (1777), 1378 states have call successors, (1777) [2022-11-25 23:39:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6035 states to 6035 states and 9298 transitions. [2022-11-25 23:39:44,747 INFO L78 Accepts]: Start accepts. Automaton has 6035 states and 9298 transitions. Word has length 106 [2022-11-25 23:39:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:39:44,747 INFO L495 AbstractCegarLoop]: Abstraction has 6035 states and 9298 transitions. [2022-11-25 23:39:44,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-11-25 23:39:44,748 INFO L276 IsEmpty]: Start isEmpty. Operand 6035 states and 9298 transitions. [2022-11-25 23:39:44,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-25 23:39:44,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:39:44,752 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:39:44,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:39:44,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 23:39:44,962 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:39:44,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:39:44,962 INFO L85 PathProgramCache]: Analyzing trace with hash -395249426, now seen corresponding path program 1 times [2022-11-25 23:39:44,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:39:44,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716906232] [2022-11-25 23:39:44,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:44,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:39:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:39:45,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:39:45,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716906232] [2022-11-25 23:39:45,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716906232] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:39:45,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026904062] [2022-11-25 23:39:45,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:45,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:39:45,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:39:45,389 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:39:45,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da68ef29-9bf8-4f33-8cb9-2c88156806d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:39:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:45,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:39:45,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:39:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 23:39:46,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:39:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:39:46,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026904062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:39:46,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1794173001] [2022-11-25 23:39:46,625 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2022-11-25 23:39:46,626 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:39:46,626 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:39:46,626 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:39:46,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:39:50,687 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-11-25 23:40:01,544 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 510 for LOIs [2022-11-25 23:40:01,743 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-11-25 23:40:03,810 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-11-25 23:40:04,009 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-11-25 23:40:04,083 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-11-25 23:40:04,197 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-11-25 23:40:07,602 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-11-25 23:40:08,168 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-11-25 23:40:08,352 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:40:42,369 WARN L233 SmtUtils]: Spent 7.30s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:40:49,935 WARN L233 SmtUtils]: Spent 7.26s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:40:58,986 WARN L233 SmtUtils]: Spent 5.45s on a formula simplification. DAG size of input: 780 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:41:18,109 WARN L233 SmtUtils]: Spent 5.75s on a formula simplification. DAG size of input: 622 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:41:24,268 WARN L233 SmtUtils]: Spent 5.77s on a formula simplification. DAG size of input: 622 DAG size of output: 597 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:41:32,516 WARN L233 SmtUtils]: Spent 5.91s on a formula simplification. DAG size of input: 630 DAG size of output: 601 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:41:38,875 WARN L233 SmtUtils]: Spent 5.91s on a formula simplification. DAG size of input: 628 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:41:55,187 WARN L233 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 634 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:42:01,869 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 632 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:42:09,721 WARN L233 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 637 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:42:16,447 WARN L233 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 637 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:42:24,424 WARN L233 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 640 DAG size of output: 605 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:42:31,254 WARN L233 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 640 DAG size of output: 605 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:42:39,416 WARN L233 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 643 DAG size of output: 607 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:42:46,307 WARN L233 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 643 DAG size of output: 606 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:42:46,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1794173001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:42:46,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:42:46,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [10, 8, 10] total 52 [2022-11-25 23:42:46,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899482906] [2022-11-25 23:42:46,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:42:46,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 23:42:46,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:42:46,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 23:42:46,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2022-11-25 23:42:46,317 INFO L87 Difference]: Start difference. First operand 6035 states and 9298 transitions. Second operand has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2022-11-25 23:42:53,598 WARN L233 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 618 DAG size of output: 583 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:43:00,149 WARN L233 SmtUtils]: Spent 6.28s on a formula simplification. DAG size of input: 624 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:43:06,533 WARN L233 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:43:12,418 WARN L233 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:43:21,594 WARN L233 SmtUtils]: Spent 8.40s on a formula simplification. DAG size of input: 609 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:43:30,452 WARN L233 SmtUtils]: Spent 8.54s on a formula simplification. DAG size of input: 615 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)