./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.production_cell.2.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_3d80f22c-4920-4245-b1b0-11ddf9c50d2b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d80f22c-4920-4245-b1b0-11ddf9c50d2b/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d80f22c-4920-4245-b1b0-11ddf9c50d2b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d80f22c-4920-4245-b1b0-11ddf9c50d2b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.production_cell.2.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d80f22c-4920-4245-b1b0-11ddf9c50d2b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d80f22c-4920-4245-b1b0-11ddf9c50d2b/bin/utaipan-7li7fVZpFI --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 64bit --witnessprinter.graph.data.programhash 56b67933c9a8b6131147f0a49ee879f84fa21fba6d9bc12c9b4243bba4ef230f --- 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-5e519f3 [2022-11-03 01:51:47,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:51:47,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:51:47,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:51:47,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:51:47,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:51:47,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:51:47,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:51:47,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:51:47,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:51:47,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:51:47,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:51:47,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:51:47,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:51:47,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:51:47,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:51:47,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:51:47,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:51:47,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:51:47,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:51:47,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:51:47,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:51:47,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:51:47,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:51:47,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:51:47,881 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:51:47,882 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:51:47,883 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:51:47,883 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:51:47,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:51:47,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:51:47,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:51:47,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:51:47,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:51:47,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:51:47,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:51:47,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:51:47,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:51:47,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:51:47,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:51:47,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:51:47,908 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d80f22c-4920-4245-b1b0-11ddf9c50d2b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 01:51:47,961 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:51:47,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:51:47,961 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:51:47,961 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:51:47,962 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:51:47,962 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:51:47,963 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:51:47,963 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:51:47,963 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:51:47,963 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:51:47,964 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:51:47,964 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:51:47,964 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:51:47,964 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:51:47,964 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:51:47,965 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:51:47,965 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:51:47,965 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:51:47,972 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:51:47,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:51:47,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:51:47,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:51:47,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:51:47,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:51:47,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:51:47,974 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:51:47,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:51:47,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:51:47,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:51:47,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:51:47,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:51:47,977 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:51:47,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:51:47,977 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:51:47,978 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:51:47,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:51:47,980 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:51:47,980 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:51:47,982 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_3d80f22c-4920-4245-b1b0-11ddf9c50d2b/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d80f22c-4920-4245-b1b0-11ddf9c50d2b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56b67933c9a8b6131147f0a49ee879f84fa21fba6d9bc12c9b4243bba4ef230f [2022-11-03 01:51:48,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:51:48,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:51:48,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:51:48,359 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:51:48,362 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:51:48,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d80f22c-4920-4245-b1b0-11ddf9c50d2b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.production_cell.2.prop1-back-serstep.c [2022-11-03 01:51:48,468 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d80f22c-4920-4245-b1b0-11ddf9c50d2b/bin/utaipan-7li7fVZpFI/data/e75ff67df/e88d62fa391b481e81b6c27577c44ec4/FLAGc5452f2a6 [2022-11-03 01:51:49,228 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:51:49,242 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d80f22c-4920-4245-b1b0-11ddf9c50d2b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.production_cell.2.prop1-back-serstep.c [2022-11-03 01:51:49,284 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d80f22c-4920-4245-b1b0-11ddf9c50d2b/bin/utaipan-7li7fVZpFI/data/e75ff67df/e88d62fa391b481e81b6c27577c44ec4/FLAGc5452f2a6 [2022-11-03 01:51:49,332 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d80f22c-4920-4245-b1b0-11ddf9c50d2b/bin/utaipan-7li7fVZpFI/data/e75ff67df/e88d62fa391b481e81b6c27577c44ec4 [2022-11-03 01:51:49,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:51:49,339 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:51:49,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:51:49,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:51:49,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:51:49,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:51:49" (1/1) ... [2022-11-03 01:51:49,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39e66e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:49, skipping insertion in model container [2022-11-03 01:51:49,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:51:49" (1/1) ... [2022-11-03 01:51:49,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:51:49,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:51:49,815 WARN L230 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_3d80f22c-4920-4245-b1b0-11ddf9c50d2b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.production_cell.2.prop1-back-serstep.c[1014,1027] [2022-11-03 01:51:50,352 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:51:50,356 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:51:50,371 WARN L230 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_3d80f22c-4920-4245-b1b0-11ddf9c50d2b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.production_cell.2.prop1-back-serstep.c[1014,1027] [2022-11-03 01:51:50,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:51:50,641 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:51:50,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:50 WrapperNode [2022-11-03 01:51:50,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:51:50,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:51:50,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:51:50,648 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:51:50,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:50" (1/1) ... [2022-11-03 01:51:50,834 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:50" (1/1) ... [2022-11-03 01:51:51,285 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2342 [2022-11-03 01:51:51,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:51:51,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:51:51,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:51:51,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:51:51,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:50" (1/1) ... [2022-11-03 01:51:51,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:50" (1/1) ... [2022-11-03 01:51:51,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:50" (1/1) ... [2022-11-03 01:51:51,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:50" (1/1) ... [2022-11-03 01:51:51,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:50" (1/1) ... [2022-11-03 01:51:51,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:50" (1/1) ... [2022-11-03 01:51:51,607 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:50" (1/1) ... [2022-11-03 01:51:51,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:50" (1/1) ... [2022-11-03 01:51:51,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:51:51,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:51:51,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:51:51,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:51:51,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:50" (1/1) ... [2022-11-03 01:51:51,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:51:51,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d80f22c-4920-4245-b1b0-11ddf9c50d2b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:51,746 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d80f22c-4920-4245-b1b0-11ddf9c50d2b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:51:51,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d80f22c-4920-4245-b1b0-11ddf9c50d2b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:51:51,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:51:51,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:51:52,519 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:51:52,522 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:53:15,762 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:53:31,892 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:53:31,892 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:53:31,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:53:31 BoogieIcfgContainer [2022-11-03 01:53:31,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:53:31,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:53:31,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:53:31,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:53:31,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:51:49" (1/3) ... [2022-11-03 01:53:31,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@336caa5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:53:31, skipping insertion in model container [2022-11-03 01:53:31,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:50" (2/3) ... [2022-11-03 01:53:31,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@336caa5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:53:31, skipping insertion in model container [2022-11-03 01:53:31,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:53:31" (3/3) ... [2022-11-03 01:53:31,907 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.production_cell.2.prop1-back-serstep.c [2022-11-03 01:53:31,930 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:53:31,930 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:53:31,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:53:31,995 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;@11e46449, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:53:31,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:53:32,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:32,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 01:53:32,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:32,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 01:53:32,020 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:32,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:32,030 INFO L85 PathProgramCache]: Analyzing trace with hash 5580945, now seen corresponding path program 1 times [2022-11-03 01:53:32,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:32,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012815603] [2022-11-03 01:53:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:32,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:41,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:53:41,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012815603] [2022-11-03 01:53:41,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012815603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:41,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:41,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:53:41,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075670412] [2022-11-03 01:53:41,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:41,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:53:41,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:53:41,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:53:41,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:53:41,806 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:43,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:53:46,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:53:47,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:53:49,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:53:49,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:49,795 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2022-11-03 01:53:49,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:53:49,798 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-03 01:53:49,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:49,806 INFO L225 Difference]: With dead ends: 15 [2022-11-03 01:53:49,806 INFO L226 Difference]: Without dead ends: 9 [2022-11-03 01:53:49,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:53:49,813 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:49,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2022-11-03 01:53:49,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-03 01:53:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2022-11-03 01:53:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:49,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2022-11-03 01:53:49,849 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2022-11-03 01:53:49,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:49,849 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2022-11-03 01:53:49,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:49,850 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2022-11-03 01:53:49,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 01:53:49,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:49,851 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-03 01:53:49,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:53:49,852 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:49,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:49,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1231265798, now seen corresponding path program 1 times [2022-11-03 01:53:49,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:49,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219113575] [2022-11-03 01:53:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:49,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat