./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.1.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_4f4a381e-3636-48ee-aede-bba5356746a2/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4a381e-3636-48ee-aede-bba5356746a2/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4a381e-3636-48ee-aede-bba5356746a2/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4a381e-3636-48ee-aede-bba5356746a2/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.1.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4a381e-3636-48ee-aede-bba5356746a2/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4a381e-3636-48ee-aede-bba5356746a2/bin/utaipan-I9t0OCRTmS --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 b4b516d0178d0fc9473e798ca87e041453ff51173eea72a0a778d5b860e42370 --- 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-8393723 [2022-11-19 07:25:32,781 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:25:32,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:25:32,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:25:32,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:25:32,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:25:32,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:25:32,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:25:32,837 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:25:32,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:25:32,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:25:32,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:25:32,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:25:32,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:25:32,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:25:32,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:25:32,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:25:32,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:25:32,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:25:32,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:25:32,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:25:32,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:25:32,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:25:32,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:25:32,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:25:32,867 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:25:32,867 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:25:32,868 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:25:32,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:25:32,873 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:25:32,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:25:32,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:25:32,877 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:25:32,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:25:32,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:25:32,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:25:32,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:25:32,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:25:32,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:25:32,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:25:32,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:25:32,885 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4a381e-3636-48ee-aede-bba5356746a2/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 07:25:32,907 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:25:32,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:25:32,908 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:25:32,909 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:25:32,909 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:25:32,910 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:25:32,910 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:25:32,910 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:25:32,911 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:25:32,911 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:25:32,911 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:25:32,911 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:25:32,912 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:25:32,912 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:25:32,912 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:25:32,913 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:25:32,913 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:25:32,913 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:25:32,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:25:32,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:25:32,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:25:32,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:25:32,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:25:32,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:25:32,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:25:32,916 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:25:32,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:25:32,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:25:32,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:25:32,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:25:32,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:25:32,918 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:25:32,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:25:32,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:25:32,918 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:25:32,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:25:32,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:25:32,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:25:32,919 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_4f4a381e-3636-48ee-aede-bba5356746a2/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4a381e-3636-48ee-aede-bba5356746a2/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4b516d0178d0fc9473e798ca87e041453ff51173eea72a0a778d5b860e42370 [2022-11-19 07:25:33,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:25:33,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:25:33,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:25:33,231 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:25:33,232 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:25:33,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4a381e-3636-48ee-aede-bba5356746a2/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.1.prop1-back-serstep.c [2022-11-19 07:25:33,311 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4a381e-3636-48ee-aede-bba5356746a2/bin/utaipan-I9t0OCRTmS/data/4e742c19c/ee15df3c35df4d9dbee2bab079aae979/FLAGfb430ff71 [2022-11-19 07:25:34,030 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:25:34,031 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4a381e-3636-48ee-aede-bba5356746a2/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.1.prop1-back-serstep.c [2022-11-19 07:25:34,055 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4a381e-3636-48ee-aede-bba5356746a2/bin/utaipan-I9t0OCRTmS/data/4e742c19c/ee15df3c35df4d9dbee2bab079aae979/FLAGfb430ff71 [2022-11-19 07:25:34,163 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4a381e-3636-48ee-aede-bba5356746a2/bin/utaipan-I9t0OCRTmS/data/4e742c19c/ee15df3c35df4d9dbee2bab079aae979 [2022-11-19 07:25:34,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:25:34,170 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:25:34,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:25:34,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:25:34,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:25:34,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:25:34" (1/1) ... [2022-11-19 07:25:34,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cf81d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:34, skipping insertion in model container [2022-11-19 07:25:34,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:25:34" (1/1) ... [2022-11-19 07:25:34,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:25:34,282 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:25:34,577 WARN L234 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_4f4a381e-3636-48ee-aede-bba5356746a2/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.1.prop1-back-serstep.c[1014,1027] [2022-11-19 07:25:35,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:25:35,053 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:25:35,066 WARN L234 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_4f4a381e-3636-48ee-aede-bba5356746a2/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.1.prop1-back-serstep.c[1014,1027] [2022-11-19 07:25:35,210 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:25:35,222 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:25:35,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:35 WrapperNode [2022-11-19 07:25:35,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:25:35,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:25:35,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:25:35,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:25:35,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:35" (1/1) ... [2022-11-19 07:25:35,305 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:35" (1/1) ... [2022-11-19 07:25:35,458 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 4285 [2022-11-19 07:25:35,458 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:25:35,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:25:35,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:25:35,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:25:35,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:35" (1/1) ... [2022-11-19 07:25:35,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:35" (1/1) ... [2022-11-19 07:25:35,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:35" (1/1) ... [2022-11-19 07:25:35,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:35" (1/1) ... [2022-11-19 07:25:35,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:35" (1/1) ... [2022-11-19 07:25:35,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:35" (1/1) ... [2022-11-19 07:25:35,609 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:35" (1/1) ... [2022-11-19 07:25:35,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:35" (1/1) ... [2022-11-19 07:25:35,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:25:35,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:25:35,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:25:35,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:25:35,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:35" (1/1) ... [2022-11-19 07:25:35,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:25:35,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4a381e-3636-48ee-aede-bba5356746a2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:35,704 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4a381e-3636-48ee-aede-bba5356746a2/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:25:35,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4a381e-3636-48ee-aede-bba5356746a2/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:25:35,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:25:35,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:25:36,479 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:25:36,481 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:25:42,145 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:26:03,898 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:26:03,898 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:26:03,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:26:03 BoogieIcfgContainer [2022-11-19 07:26:03,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:26:03,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:26:03,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:26:03,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:26:03,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:25:34" (1/3) ... [2022-11-19 07:26:03,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b51f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:26:03, skipping insertion in model container [2022-11-19 07:26:03,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:35" (2/3) ... [2022-11-19 07:26:03,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b51f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:26:03, skipping insertion in model container [2022-11-19 07:26:03,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:26:03" (3/3) ... [2022-11-19 07:26:03,917 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.lamport.1.prop1-back-serstep.c [2022-11-19 07:26:03,937 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:26:03,937 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:26:04,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:26:04,010 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;@58c35c94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:26:04,011 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:26:04,015 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) [2022-11-19 07:26:04,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 07:26:04,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:04,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 07:26:04,022 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:04,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:04,030 INFO L85 PathProgramCache]: Analyzing trace with hash 92350560, now seen corresponding path program 1 times [2022-11-19 07:26:04,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:04,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827170151] [2022-11-19 07:26:04,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:04,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:08,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:08,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827170151] [2022-11-19 07:26:08,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827170151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:08,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:26:08,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:26:08,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260850465] [2022-11-19 07:26:08,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:08,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:26:08,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:08,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:26:08,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:26:08,063 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) [2022-11-19 07:26:11,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:12,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:12,468 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2022-11-19 07:26:12,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:26:12,471 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 [2022-11-19 07:26:12,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:12,478 INFO L225 Difference]: With dead ends: 15 [2022-11-19 07:26:12,484 INFO L226 Difference]: Without dead ends: 9 [2022-11-19 07:26:12,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:26:12,492 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:12,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-11-19 07:26:12,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-19 07:26:12,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2022-11-19 07:26:12,527 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) [2022-11-19 07:26:12,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2022-11-19 07:26:12,529 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2022-11-19 07:26:12,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:12,529 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2022-11-19 07:26:12,529 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) [2022-11-19 07:26:12,530 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2022-11-19 07:26:12,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:26:12,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:12,531 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-19 07:26:12,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:26:12,532 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:12,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:12,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1759033167, now seen corresponding path program 1 times [2022-11-19 07:26:12,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:12,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141695294] [2022-11-19 07:26:12,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:12,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms