./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/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_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/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_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/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 bcf02459061acfdf5a11fb9ee5e832193100590b0367d937f266d29520f326a3 --- 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 23:30:42,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:30:42,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:30:42,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:30:42,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:30:42,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:30:42,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:30:42,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:30:42,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:30:42,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:30:42,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:30:42,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:30:42,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:30:42,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:30:42,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:30:42,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:30:42,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:30:42,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:30:42,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:30:42,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:30:42,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:30:42,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:30:42,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:30:42,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:30:42,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:30:42,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:30:42,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:30:42,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:30:42,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:30:42,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:30:42,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:30:42,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:30:42,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:30:42,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:30:42,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:30:42,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:30:42,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:30:42,923 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:30:42,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:30:42,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:30:42,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:30:42,929 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:30:42,966 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:30:42,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:30:42,981 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:30:42,982 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:30:42,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:30:42,983 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:30:42,983 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:30:42,984 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:30:42,984 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:30:42,984 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:30:42,986 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:30:42,986 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:30:42,986 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:30:42,986 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:30:42,987 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:30:42,987 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:30:42,987 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:30:42,987 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:30:42,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:30:42,991 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:30:42,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:30:42,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:30:42,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:30:42,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:30:42,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:30:42,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:30:42,999 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:30:42,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:30:42,999 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:30:43,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:30:43,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:30:43,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:30:43,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:30:43,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:30:43,001 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:30:43,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:30:43,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:30:43,002 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:30:43,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:30:43,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:30:43,003 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:30:43,004 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_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bcf02459061acfdf5a11fb9ee5e832193100590b0367d937f266d29520f326a3 [2022-11-25 23:30:43,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:30:43,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:30:43,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:30:43,406 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:30:43,407 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:30:43,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c [2022-11-25 23:30:46,670 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:30:47,112 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:30:47,114 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c [2022-11-25 23:30:47,135 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/bin/utaipan-ByfvJB40ur/data/36ac30b0f/8e5e6d0e9ccf4278a727874bcda3d1b8/FLAG54ac438d2 [2022-11-25 23:30:47,163 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/bin/utaipan-ByfvJB40ur/data/36ac30b0f/8e5e6d0e9ccf4278a727874bcda3d1b8 [2022-11-25 23:30:47,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:30:47,174 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:30:47,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:30:47,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:30:47,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:30:47,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:30:47" (1/1) ... [2022-11-25 23:30:47,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2985cb4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:47, skipping insertion in model container [2022-11-25 23:30:47,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:30:47" (1/1) ... [2022-11-25 23:30:47,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:30:47,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:30:47,582 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_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c[11232,11245] [2022-11-25 23:30:47,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:30:47,890 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:30:47,971 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_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c[11232,11245] [2022-11-25 23:30:48,082 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:30:48,111 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:30:48,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:48 WrapperNode [2022-11-25 23:30:48,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:30:48,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:30:48,113 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:30:48,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:30:48,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:48" (1/1) ... [2022-11-25 23:30:48,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:48" (1/1) ... [2022-11-25 23:30:48,204 INFO L138 Inliner]: procedures = 98, calls = 354, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 926 [2022-11-25 23:30:48,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:30:48,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:30:48,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:30:48,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:30:48,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:48" (1/1) ... [2022-11-25 23:30:48,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:48" (1/1) ... [2022-11-25 23:30:48,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:48" (1/1) ... [2022-11-25 23:30:48,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:48" (1/1) ... [2022-11-25 23:30:48,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:48" (1/1) ... [2022-11-25 23:30:48,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:48" (1/1) ... [2022-11-25 23:30:48,266 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:48" (1/1) ... [2022-11-25 23:30:48,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:48" (1/1) ... [2022-11-25 23:30:48,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:30:48,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:30:48,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:30:48,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:30:48,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:48" (1/1) ... [2022-11-25 23:30:48,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:30:48,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:30:48,343 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:30:48,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:30:48,397 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-25 23:30:48,397 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-25 23:30:48,397 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-25 23:30:48,397 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-25 23:30:48,398 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-25 23:30:48,398 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-25 23:30:48,398 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-25 23:30:48,398 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-25 23:30:48,398 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-25 23:30:48,399 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-25 23:30:48,399 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-25 23:30:48,399 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-25 23:30:48,399 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-25 23:30:48,399 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-25 23:30:48,399 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-25 23:30:48,400 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-25 23:30:48,400 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-25 23:30:48,400 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-25 23:30:48,400 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-25 23:30:48,400 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-25 23:30:48,401 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-25 23:30:48,401 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-25 23:30:48,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:30:48,401 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-25 23:30:48,401 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-25 23:30:48,401 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-25 23:30:48,402 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-25 23:30:48,402 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-25 23:30:48,402 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-25 23:30:48,402 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-25 23:30:48,402 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-25 23:30:48,403 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-25 23:30:48,403 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-25 23:30:48,403 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-25 23:30:48,403 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-25 23:30:48,403 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-25 23:30:48,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-25 23:30:48,404 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-25 23:30:48,404 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-25 23:30:48,404 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-25 23:30:48,404 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-25 23:30:48,404 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-25 23:30:48,405 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-25 23:30:48,405 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-25 23:30:48,405 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-25 23:30:48,405 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-25 23:30:48,405 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-25 23:30:48,406 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-25 23:30:48,406 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-25 23:30:48,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:30:48,406 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-25 23:30:48,406 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-25 23:30:48,406 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-11-25 23:30:48,407 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-11-25 23:30:48,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:30:48,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:30:48,407 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-25 23:30:48,407 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-25 23:30:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-25 23:30:48,408 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-25 23:30:48,606 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:30:48,609 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:30:50,149 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:30:51,149 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:30:51,150 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 23:30:51,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:30:51 BoogieIcfgContainer [2022-11-25 23:30:51,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:30:51,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:30:51,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:30:51,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:30:51,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:30:47" (1/3) ... [2022-11-25 23:30:51,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@504e1b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:30:51, skipping insertion in model container [2022-11-25 23:30:51,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:48" (2/3) ... [2022-11-25 23:30:51,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@504e1b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:30:51, skipping insertion in model container [2022-11-25 23:30:51,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:30:51" (3/3) ... [2022-11-25 23:30:51,170 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product24.cil.c [2022-11-25 23:30:51,191 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:30:51,192 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:30:51,285 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:30:51,295 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;@6344213, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:30:51,297 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:30:51,308 INFO L276 IsEmpty]: Start isEmpty. Operand has 413 states, 275 states have (on average 1.5672727272727274) internal successors, (431), 298 states have internal predecessors, (431), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-25 23:30:51,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-25 23:30:51,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:51,332 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 23:30:51,333 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:30:51,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:51,341 INFO L85 PathProgramCache]: Analyzing trace with hash 520183605, now seen corresponding path program 1 times [2022-11-25 23:30:51,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:51,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461319053] [2022-11-25 23:30:51,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:51,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:30:52,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:52,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461319053] [2022-11-25 23:30:52,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461319053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:52,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:52,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:30:52,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110266718] [2022-11-25 23:30:52,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:52,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:30:52,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:52,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:30:52,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:30:52,676 INFO L87 Difference]: Start difference. First operand has 413 states, 275 states have (on average 1.5672727272727274) internal successors, (431), 298 states have internal predecessors, (431), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-25 23:30:55,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:55,921 INFO L93 Difference]: Finished difference Result 1329 states and 2129 transitions. [2022-11-25 23:30:55,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:30:55,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2022-11-25 23:30:55,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:55,968 INFO L225 Difference]: With dead ends: 1329 [2022-11-25 23:30:55,968 INFO L226 Difference]: Without dead ends: 933 [2022-11-25 23:30:55,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:30:55,987 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 1701 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1775 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 2347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:55,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1775 Valid, 996 Invalid, 2347 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [663 Valid, 1684 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-25 23:30:56,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2022-11-25 23:30:56,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 846. [2022-11-25 23:30:56,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 589 states have (on average 1.5823429541595926) internal successors, (932), 619 states have internal predecessors, (932), 207 states have call successors, (207), 48 states have call predecessors, (207), 49 states have return successors, (209), 191 states have call predecessors, (209), 202 states have call successors, (209) [2022-11-25 23:30:56,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1348 transitions. [2022-11-25 23:30:56,162 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1348 transitions. Word has length 54 [2022-11-25 23:30:56,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:56,163 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1348 transitions. [2022-11-25 23:30:56,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-25 23:30:56,163 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1348 transitions. [2022-11-25 23:30:56,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-25 23:30:56,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:56,173 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] [2022-11-25 23:30:56,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:30:56,174 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:30:56,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:56,175 INFO L85 PathProgramCache]: Analyzing trace with hash 2131121629, now seen corresponding path program 1 times [2022-11-25 23:30:56,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:56,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699671071] [2022-11-25 23:30:56,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:56,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:56,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:30:56,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:56,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699671071] [2022-11-25 23:30:56,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699671071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:56,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:56,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 23:30:56,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517923359] [2022-11-25 23:30:56,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:56,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:30:56,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:56,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:30:56,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:30:56,865 INFO L87 Difference]: Start difference. First operand 846 states and 1348 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-25 23:31:01,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:01,166 INFO L93 Difference]: Finished difference Result 2916 states and 4689 transitions. [2022-11-25 23:31:01,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 23:31:01,167 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 98 [2022-11-25 23:31:01,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:01,183 INFO L225 Difference]: With dead ends: 2916 [2022-11-25 23:31:01,184 INFO L226 Difference]: Without dead ends: 2093 [2022-11-25 23:31:01,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-25 23:31:01,191 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 1441 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 4829 mSolverCounterSat, 741 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 2161 SdHoareTripleChecker+Invalid, 5570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 741 IncrementalHoareTripleChecker+Valid, 4829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:01,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1523 Valid, 2161 Invalid, 5570 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [741 Valid, 4829 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-25 23:31:01,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2022-11-25 23:31:01,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 1906. [2022-11-25 23:31:01,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1290 states have (on average 1.5534883720930233) internal successors, (2004), 1362 states have internal predecessors, (2004), 512 states have call successors, (512), 91 states have call predecessors, (512), 103 states have return successors, (531), 485 states have call predecessors, (531), 507 states have call successors, (531) [2022-11-25 23:31:01,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 3047 transitions. [2022-11-25 23:31:01,363 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 3047 transitions. Word has length 98 [2022-11-25 23:31:01,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:01,364 INFO L495 AbstractCegarLoop]: Abstraction has 1906 states and 3047 transitions. [2022-11-25 23:31:01,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-25 23:31:01,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 3047 transitions. [2022-11-25 23:31:01,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-25 23:31:01,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:01,371 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 23:31:01,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:31:01,371 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:01,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:01,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1596055414, now seen corresponding path program 1 times [2022-11-25 23:31:01,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:01,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073936070] [2022-11-25 23:31:01,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:01,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:31:02,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:02,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073936070] [2022-11-25 23:31:02,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073936070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:31:02,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:31:02,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:31:02,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891354257] [2022-11-25 23:31:02,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:31:02,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:31:02,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:02,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:31:02,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:31:02,022 INFO L87 Difference]: Start difference. First operand 1906 states and 3047 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-25 23:31:04,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:04,923 INFO L93 Difference]: Finished difference Result 4803 states and 7696 transitions. [2022-11-25 23:31:04,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:31:04,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 99 [2022-11-25 23:31:04,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:04,954 INFO L225 Difference]: With dead ends: 4803 [2022-11-25 23:31:04,954 INFO L226 Difference]: Without dead ends: 2922 [2022-11-25 23:31:04,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:31:04,975 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 1228 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 2743 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1311 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 3211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 2743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:04,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1311 Valid, 1661 Invalid, 3211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 2743 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-25 23:31:04,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2022-11-25 23:31:05,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 2804. [2022-11-25 23:31:05,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 1924 states have (on average 1.5618503118503118) internal successors, (3005), 2023 states have internal predecessors, (3005), 714 states have call successors, (714), 145 states have call predecessors, (714), 165 states have return successors, (761), 679 states have call predecessors, (761), 709 states have call successors, (761) [2022-11-25 23:31:05,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 4480 transitions. [2022-11-25 23:31:05,268 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 4480 transitions. Word has length 99 [2022-11-25 23:31:05,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:05,269 INFO L495 AbstractCegarLoop]: Abstraction has 2804 states and 4480 transitions. [2022-11-25 23:31:05,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-25 23:31:05,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 4480 transitions. [2022-11-25 23:31:05,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-25 23:31:05,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:05,278 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, 1, 1, 1] [2022-11-25 23:31:05,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 23:31:05,278 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:05,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:05,279 INFO L85 PathProgramCache]: Analyzing trace with hash 387870079, now seen corresponding path program 1 times [2022-11-25 23:31:05,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:05,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059462147] [2022-11-25 23:31:05,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:05,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:31:05,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:05,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059462147] [2022-11-25 23:31:05,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059462147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:31:05,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:31:05,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:31:05,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137172009] [2022-11-25 23:31:05,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:31:05,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:31:05,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:05,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:31:05,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:31:05,761 INFO L87 Difference]: Start difference. First operand 2804 states and 4480 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-25 23:31:06,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:06,703 INFO L93 Difference]: Finished difference Result 2905 states and 4646 transitions. [2022-11-25 23:31:06,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:31:06,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 103 [2022-11-25 23:31:06,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:06,727 INFO L225 Difference]: With dead ends: 2905 [2022-11-25 23:31:06,727 INFO L226 Difference]: Without dead ends: 2890 [2022-11-25 23:31:06,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:31:06,732 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 699 mSDsluCounter, 1366 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1964 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:06,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 1964 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 23:31:06,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2022-11-25 23:31:07,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 2810. [2022-11-25 23:31:07,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2810 states, 1930 states have (on average 1.560103626943005) internal successors, (3011), 2029 states have internal predecessors, (3011), 714 states have call successors, (714), 145 states have call predecessors, (714), 165 states have return successors, (761), 679 states have call predecessors, (761), 709 states have call successors, (761) [2022-11-25 23:31:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 4486 transitions. [2022-11-25 23:31:07,069 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 4486 transitions. Word has length 103 [2022-11-25 23:31:07,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:07,072 INFO L495 AbstractCegarLoop]: Abstraction has 2810 states and 4486 transitions. [2022-11-25 23:31:07,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-25 23:31:07,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 4486 transitions. [2022-11-25 23:31:07,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-25 23:31:07,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:07,076 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:31:07,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 23:31:07,077 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:07,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:07,078 INFO L85 PathProgramCache]: Analyzing trace with hash -797193323, now seen corresponding path program 1 times [2022-11-25 23:31:07,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:07,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190835571] [2022-11-25 23:31:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:07,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:07,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:31:07,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:07,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190835571] [2022-11-25 23:31:07,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190835571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:31:07,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:31:07,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 23:31:07,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037024887] [2022-11-25 23:31:07,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:31:07,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:31:07,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:07,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:31:07,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:31:07,785 INFO L87 Difference]: Start difference. First operand 2810 states and 4486 transitions. Second operand has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-25 23:31:15,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:15,874 INFO L93 Difference]: Finished difference Result 3235 states and 5128 transitions. [2022-11-25 23:31:15,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-25 23:31:15,875 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) Word has length 108 [2022-11-25 23:31:15,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:15,898 INFO L225 Difference]: With dead ends: 3235 [2022-11-25 23:31:15,898 INFO L226 Difference]: Without dead ends: 3218 [2022-11-25 23:31:15,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-11-25 23:31:15,903 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 2782 mSDsluCounter, 3389 mSDsCounter, 0 mSdLazyCounter, 9437 mSolverCounterSat, 1644 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2811 SdHoareTripleChecker+Valid, 3942 SdHoareTripleChecker+Invalid, 11081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1644 IncrementalHoareTripleChecker+Valid, 9437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:15,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2811 Valid, 3942 Invalid, 11081 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1644 Valid, 9437 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-25 23:31:15,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3218 states. [2022-11-25 23:31:16,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3218 to 2998. [2022-11-25 23:31:16,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2072 states have (on average 1.5608108108108107) internal successors, (3234), 2169 states have internal predecessors, (3234), 731 states have call successors, (731), 175 states have call predecessors, (731), 194 states have return successors, (782), 697 states have call predecessors, (782), 726 states have call successors, (782) [2022-11-25 23:31:16,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 4747 transitions. [2022-11-25 23:31:16,249 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 4747 transitions. Word has length 108 [2022-11-25 23:31:16,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:16,250 INFO L495 AbstractCegarLoop]: Abstraction has 2998 states and 4747 transitions. [2022-11-25 23:31:16,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-25 23:31:16,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 4747 transitions. [2022-11-25 23:31:16,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-25 23:31:16,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:16,256 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:31:16,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 23:31:16,256 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:16,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:16,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1226989648, now seen corresponding path program 1 times [2022-11-25 23:31:16,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:16,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802350601] [2022-11-25 23:31:16,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:16,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:31:20,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:20,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802350601] [2022-11-25 23:31:20,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802350601] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:31:20,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687038223] [2022-11-25 23:31:20,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:20,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:20,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:20,741 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:20,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:31:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:21,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 2087 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:31:21,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:31:21,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:31:21,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687038223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:31:21,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:31:21,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2022-11-25 23:31:21,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178604929] [2022-11-25 23:31:21,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:31:21,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:31:21,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:21,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:31:21,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2022-11-25 23:31:21,517 INFO L87 Difference]: Start difference. First operand 2998 states and 4747 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-25 23:31:22,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:22,080 INFO L93 Difference]: Finished difference Result 3161 states and 5014 transitions. [2022-11-25 23:31:22,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:31:22,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 115 [2022-11-25 23:31:22,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:22,102 INFO L225 Difference]: With dead ends: 3161 [2022-11-25 23:31:22,102 INFO L226 Difference]: Without dead ends: 3146 [2022-11-25 23:31:22,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2022-11-25 23:31:22,108 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 47 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1853 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:22,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1853 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:31:22,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2022-11-25 23:31:22,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 3012. [2022-11-25 23:31:22,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3012 states, 2086 states have (on average 1.5570469798657718) internal successors, (3248), 2183 states have internal predecessors, (3248), 731 states have call successors, (731), 175 states have call predecessors, (731), 194 states have return successors, (782), 697 states have call predecessors, (782), 726 states have call successors, (782) [2022-11-25 23:31:22,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 4761 transitions. [2022-11-25 23:31:22,450 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 4761 transitions. Word has length 115 [2022-11-25 23:31:22,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:22,452 INFO L495 AbstractCegarLoop]: Abstraction has 3012 states and 4761 transitions. [2022-11-25 23:31:22,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-25 23:31:22,452 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 4761 transitions. [2022-11-25 23:31:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-25 23:31:22,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:22,458 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 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 23:31:22,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:31:22,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:22,668 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:22,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:22,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1796488684, now seen corresponding path program 1 times [2022-11-25 23:31:22,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:22,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875007580] [2022-11-25 23:31:22,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:22,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-25 23:31:25,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:25,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875007580] [2022-11-25 23:31:25,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875007580] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:31:25,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358747111] [2022-11-25 23:31:25,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:25,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:25,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:25,177 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:25,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a41479c-53c1-4e15-bbcf-a159c7f8efe7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:31:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:25,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-25 23:31:25,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 23:31:27,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:34:53,107 WARN L233 SmtUtils]: Spent 3.36m on a formula simplification. DAG size of input: 2889 DAG size of output: 109 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:38:09,780 WARN L233 SmtUtils]: Spent 3.24m on a formula simplification. DAG size of input: 2889 DAG size of output: 109 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:41:26,118 WARN L233 SmtUtils]: Spent 3.23m on a formula simplification. DAG size of input: 2885 DAG size of output: 105 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)