./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Arbiter.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Arbiter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 68aa30a409d960bbf9135edba3b497aa140aed92035337dcb9292c1552b8943f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 02:10:14,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:10:14,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:10:14,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:10:14,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:10:14,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:10:14,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:10:14,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:10:14,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:10:14,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:10:14,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:10:14,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:10:14,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:10:14,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:10:14,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:10:14,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:10:14,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:10:14,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:10:14,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:10:14,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:10:14,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:10:14,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:10:14,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:10:14,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:10:14,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:10:14,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:10:14,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:10:14,861 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:10:14,861 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:10:14,872 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:10:14,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:10:14,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:10:14,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:10:14,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:10:14,876 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:10:14,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:10:14,877 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:10:14,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:10:14,878 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:10:14,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:10:14,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:10:14,886 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-22 02:10:14,924 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:10:14,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:10:14,924 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:10:14,925 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:10:14,938 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:10:14,939 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:10:14,939 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:10:14,940 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:10:14,940 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:10:14,940 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:10:14,941 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:10:14,942 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:10:14,942 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:10:14,942 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:10:14,942 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:10:14,943 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:10:14,943 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:10:14,943 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:10:14,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:10:14,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:10:14,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:10:14,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:10:14,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:10:14,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:10:14,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:10:14,948 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:10:14,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:10:14,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:10:14,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:10:14,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:10:14,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:10:14,950 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:10:14,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:10:14,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:10:14,951 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:10:14,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:10:14,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:10:14,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:10:14,952 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_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68aa30a409d960bbf9135edba3b497aa140aed92035337dcb9292c1552b8943f [2022-11-22 02:10:15,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:10:15,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:10:15,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:10:15,262 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:10:15,262 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:10:15,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Arbiter.c [2022-11-22 02:10:18,307 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:10:18,655 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:10:18,656 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Arbiter.c [2022-11-22 02:10:18,666 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/data/59068b9b0/8be7c7b5a9c44c9984b785e446c523dd/FLAG79e18ca71 [2022-11-22 02:10:18,681 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/data/59068b9b0/8be7c7b5a9c44c9984b785e446c523dd [2022-11-22 02:10:18,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:10:18,685 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:10:18,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:10:18,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:10:18,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:10:18,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:10:18" (1/1) ... [2022-11-22 02:10:18,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4339c057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:18, skipping insertion in model container [2022-11-22 02:10:18,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:10:18" (1/1) ... [2022-11-22 02:10:18,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:10:18,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:10:18,980 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_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Arbiter.c[1107,1120] [2022-11-22 02:10:19,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:10:19,219 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:10:19,231 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_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Arbiter.c[1107,1120] [2022-11-22 02:10:19,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:10:19,395 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:10:19,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:19 WrapperNode [2022-11-22 02:10:19,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:10:19,397 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:10:19,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:10:19,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:10:19,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:19" (1/1) ... [2022-11-22 02:10:19,446 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:19" (1/1) ... [2022-11-22 02:10:19,596 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1095 [2022-11-22 02:10:19,596 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:10:19,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:10:19,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:10:19,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:10:19,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:19" (1/1) ... [2022-11-22 02:10:19,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:19" (1/1) ... [2022-11-22 02:10:19,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:19" (1/1) ... [2022-11-22 02:10:19,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:19" (1/1) ... [2022-11-22 02:10:19,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:19" (1/1) ... [2022-11-22 02:10:19,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:19" (1/1) ... [2022-11-22 02:10:19,660 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:19" (1/1) ... [2022-11-22 02:10:19,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:19" (1/1) ... [2022-11-22 02:10:19,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:10:19,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:10:19,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:10:19,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:10:19,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:19" (1/1) ... [2022-11-22 02:10:19,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:10:19,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:10:19,722 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:10:19,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:10:19,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:10:19,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:10:20,162 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:10:20,173 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:10:26,417 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:10:26,445 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:10:26,445 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 02:10:26,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:10:26 BoogieIcfgContainer [2022-11-22 02:10:26,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:10:26,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:10:26,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:10:26,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:10:26,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:10:18" (1/3) ... [2022-11-22 02:10:26,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@541f3b3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:10:26, skipping insertion in model container [2022-11-22 02:10:26,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:19" (2/3) ... [2022-11-22 02:10:26,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@541f3b3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:10:26, skipping insertion in model container [2022-11-22 02:10:26,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:10:26" (3/3) ... [2022-11-22 02:10:26,457 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_Arbiter.c [2022-11-22 02:10:26,476 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:10:26,476 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:10:26,531 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:10:26,539 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;@11bbaac9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:10:26,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:10:26,543 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) [2022-11-22 02:10:26,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 02:10:26,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:26,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 02:10:26,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:26,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:26,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1827279, now seen corresponding path program 1 times [2022-11-22 02:10:26,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:10:26,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551045012] [2022-11-22 02:10:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:26,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:10:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 02:10:27,109 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-22 02:10:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 02:10:27,325 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-22 02:10:27,327 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-22 02:10:27,329 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-22 02:10:27,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:10:27,336 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-22 02:10:27,341 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-22 02:10:27,382 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-22 02:10:27,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 02:10:27 BoogieIcfgContainer [2022-11-22 02:10:27,403 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-22 02:10:27,405 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-22 02:10:27,406 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-22 02:10:27,406 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-22 02:10:27,407 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:10:26" (3/4) ... [2022-11-22 02:10:27,411 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-22 02:10:27,411 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-22 02:10:27,413 INFO L158 Benchmark]: Toolchain (without parser) took 8727.79ms. Allocated memory was 136.3MB in the beginning and 524.3MB in the end (delta: 388.0MB). Free memory was 91.3MB in the beginning and 364.6MB in the end (delta: -273.3MB). Peak memory consumption was 116.6MB. Max. memory is 16.1GB. [2022-11-22 02:10:27,414 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 136.3MB. Free memory is still 105.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 02:10:27,415 INFO L158 Benchmark]: CACSL2BoogieTranslator took 709.87ms. Allocated memory is still 136.3MB. Free memory was 90.9MB in the beginning and 55.7MB in the end (delta: 35.2MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2022-11-22 02:10:27,416 INFO L158 Benchmark]: Boogie Procedure Inliner took 199.34ms. Allocated memory was 136.3MB in the beginning and 167.8MB in the end (delta: 31.5MB). Free memory was 55.7MB in the beginning and 132.5MB in the end (delta: -76.9MB). Peak memory consumption was 21.7MB. Max. memory is 16.1GB. [2022-11-22 02:10:27,421 INFO L158 Benchmark]: Boogie Preprocessor took 81.04ms. Allocated memory is still 167.8MB. Free memory was 132.5MB in the beginning and 128.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-22 02:10:27,422 INFO L158 Benchmark]: RCFGBuilder took 6769.11ms. Allocated memory was 167.8MB in the beginning and 524.3MB in the end (delta: 356.5MB). Free memory was 127.4MB in the beginning and 427.5MB in the end (delta: -300.1MB). Peak memory consumption was 315.6MB. Max. memory is 16.1GB. [2022-11-22 02:10:27,423 INFO L158 Benchmark]: TraceAbstraction took 953.44ms. Allocated memory is still 524.3MB. Free memory was 427.5MB in the beginning and 364.6MB in the end (delta: 62.9MB). Peak memory consumption was 62.9MB. Max. memory is 16.1GB. [2022-11-22 02:10:27,424 INFO L158 Benchmark]: Witness Printer took 6.32ms. Allocated memory is still 524.3MB. Free memory was 364.6MB in the beginning and 364.6MB in the end (delta: 2.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 02:10:27,432 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 136.3MB. Free memory is still 105.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 709.87ms. Allocated memory is still 136.3MB. Free memory was 90.9MB in the beginning and 55.7MB in the end (delta: 35.2MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 199.34ms. Allocated memory was 136.3MB in the beginning and 167.8MB in the end (delta: 31.5MB). Free memory was 55.7MB in the beginning and 132.5MB in the end (delta: -76.9MB). Peak memory consumption was 21.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 81.04ms. Allocated memory is still 167.8MB. Free memory was 132.5MB in the beginning and 128.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 6769.11ms. Allocated memory was 167.8MB in the beginning and 524.3MB in the end (delta: 356.5MB). Free memory was 127.4MB in the beginning and 427.5MB in the end (delta: -300.1MB). Peak memory consumption was 315.6MB. Max. memory is 16.1GB. * TraceAbstraction took 953.44ms. Allocated memory is still 524.3MB. Free memory was 427.5MB in the beginning and 364.6MB in the end (delta: 62.9MB). Peak memory consumption was 62.9MB. Max. memory is 16.1GB. * Witness Printer took 6.32ms. Allocated memory is still 524.3MB. Free memory was 364.6MB in the beginning and 364.6MB in the end (delta: 2.6kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 240, overapproximation of bitwiseOr at line 220, overapproximation of bitwiseAnd at line 189. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_6 mask_SORT_6 = (SORT_6)-1 >> (sizeof(SORT_6) * 8 - 32); [L29] const SORT_6 msb_SORT_6 = (SORT_6)1 << (32 - 1); [L31] const SORT_45 mask_SORT_45 = (SORT_45)-1 >> (sizeof(SORT_45) * 8 - 2); [L32] const SORT_45 msb_SORT_45 = (SORT_45)1 << (2 - 1); [L34] const SORT_50 mask_SORT_50 = (SORT_50)-1 >> (sizeof(SORT_50) * 8 - 30); [L35] const SORT_50 msb_SORT_50 = (SORT_50)1 << (30 - 1); [L37] const SORT_1 var_3 = 0; [L38] const SORT_6 var_8 = 1; [L39] const SORT_1 var_32 = 1; [L40] const SORT_6 var_46 = 3; [L41] const SORT_45 var_47 = 0; [L42] const SORT_50 var_51 = 0; [L43] const SORT_45 var_72 = 1; [L44] const SORT_45 var_77 = 2; [L46] SORT_1 input_2; [L47] SORT_1 input_85; [L48] SORT_1 input_95; [L49] SORT_1 input_105; [L50] SORT_1 input_113; [L51] SORT_1 input_114; [L52] SORT_1 input_115; [L53] SORT_1 input_125; [L54] SORT_1 input_132; [L55] SORT_1 input_133; [L56] SORT_1 input_134; [L57] SORT_1 input_144; [L58] SORT_1 input_151; [L59] SORT_1 input_152; [L60] SORT_1 input_153; [L61] SORT_1 input_163; [L62] SORT_45 input_170; [L63] SORT_1 input_181; [L64] SORT_1 input_187; [L65] SORT_45 input_194; [L66] SORT_45 input_200; [L67] SORT_45 input_204; [L68] SORT_1 input_214; [L69] SORT_1 input_220; [L70] SORT_45 input_227; [L71] SORT_45 input_233; [L72] SORT_45 input_237; [L73] SORT_1 input_247; [L74] SORT_1 input_253; [L75] SORT_45 input_260; [L76] SORT_45 input_266; [L77] SORT_45 input_270; [L78] SORT_45 input_280; [L79] SORT_45 input_281; [L80] SORT_45 input_282; [L81] SORT_45 input_292; [L82] SORT_45 input_302; [L83] SORT_45 input_303; [L84] SORT_45 input_304; [L85] SORT_45 input_314; [L86] SORT_45 input_324; [L87] SORT_45 input_325; [L88] SORT_45 input_326; [L89] SORT_45 input_336; [L91] SORT_1 state_4 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L92] SORT_1 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L93] SORT_1 state_17 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L94] SORT_1 state_36 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L95] SORT_1 state_38 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L96] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L97] SORT_45 state_48 = __VERIFIER_nondet_uchar() & mask_SORT_45; [L98] SORT_1 state_56 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L99] SORT_45 state_58 = __VERIFIER_nondet_uchar() & mask_SORT_45; [L100] SORT_1 state_60 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L101] SORT_45 state_62 = __VERIFIER_nondet_uchar() & mask_SORT_45; [L102] SORT_1 state_64 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L103] SORT_45 state_66 = __VERIFIER_nondet_uchar() & mask_SORT_45; [L104] SORT_45 state_70 = __VERIFIER_nondet_uchar() & mask_SORT_45; [L105] SORT_45 state_75 = __VERIFIER_nondet_uchar() & mask_SORT_45; [L106] SORT_45 state_80 = __VERIFIER_nondet_uchar() & mask_SORT_45; [L108] SORT_1 init_5_arg_1 = var_3; [L109] state_4 = init_5_arg_1 [L110] SORT_1 init_11_arg_1 = var_3; [L111] state_10 = init_11_arg_1 [L112] SORT_1 init_18_arg_1 = var_3; [L113] state_17 = init_18_arg_1 [L114] SORT_1 init_37_arg_1 = var_32; [L115] state_36 = init_37_arg_1 [L116] SORT_1 init_39_arg_1 = var_32; [L117] state_38 = init_39_arg_1 [L118] SORT_1 init_42_arg_1 = var_32; [L119] state_41 = init_42_arg_1 [L120] SORT_45 init_49_arg_1 = var_47; [L121] state_48 = init_49_arg_1 [L122] SORT_1 init_57_arg_1 = var_3; [L123] state_56 = init_57_arg_1 [L124] SORT_45 init_59_arg_1 = var_47; [L125] state_58 = init_59_arg_1 [L126] SORT_1 init_61_arg_1 = var_3; [L127] state_60 = init_61_arg_1 [L128] SORT_45 init_63_arg_1 = var_47; [L129] state_62 = init_63_arg_1 [L130] SORT_1 init_65_arg_1 = var_3; [L131] state_64 = init_65_arg_1 [L132] SORT_45 init_67_arg_1 = var_47; [L133] state_66 = init_67_arg_1 [L134] SORT_45 init_71_arg_1 = var_47; [L135] state_70 = init_71_arg_1 [L136] SORT_45 init_76_arg_1 = var_47; [L137] state_75 = init_76_arg_1 [L138] SORT_45 init_81_arg_1 = var_47; [L139] state_80 = init_81_arg_1 VAL [init_11_arg_1=0, init_18_arg_1=0, init_37_arg_1=1, init_39_arg_1=1, init_42_arg_1=1, init_49_arg_1=0, init_57_arg_1=0, init_59_arg_1=0, init_5_arg_1=0, init_61_arg_1=0, init_63_arg_1=0, init_65_arg_1=0, init_67_arg_1=0, init_71_arg_1=0, init_76_arg_1=0, init_81_arg_1=0, mask_SORT_1=1, mask_SORT_45=3, mask_SORT_50=4294967295, mask_SORT_6=4294967295, msb_SORT_1=1, msb_SORT_45=2, msb_SORT_50=536870912, msb_SORT_6=2147483648, state_10=0, state_17=0, state_36=1, state_38=1, state_4=0, state_41=1, state_48=0, state_56=0, state_58=0, state_60=0, state_62=0, state_64=0, state_66=0, state_70=0, state_75=0, state_80=0, var_3=0, var_32=1, var_46=3, var_47=0, var_51=0, var_72=1, var_77=2, var_8=1] [L142] input_2 = __VERIFIER_nondet_uchar() [L143] input_85 = __VERIFIER_nondet_uchar() [L144] input_95 = __VERIFIER_nondet_uchar() [L145] input_105 = __VERIFIER_nondet_uchar() [L146] input_113 = __VERIFIER_nondet_uchar() [L147] input_114 = __VERIFIER_nondet_uchar() [L148] input_115 = __VERIFIER_nondet_uchar() [L149] input_125 = __VERIFIER_nondet_uchar() [L150] input_132 = __VERIFIER_nondet_uchar() [L151] input_133 = __VERIFIER_nondet_uchar() [L152] input_134 = __VERIFIER_nondet_uchar() [L153] input_144 = __VERIFIER_nondet_uchar() [L154] input_151 = __VERIFIER_nondet_uchar() [L155] input_152 = __VERIFIER_nondet_uchar() [L156] input_153 = __VERIFIER_nondet_uchar() [L157] input_163 = __VERIFIER_nondet_uchar() [L158] input_170 = __VERIFIER_nondet_uchar() [L159] input_181 = __VERIFIER_nondet_uchar() [L160] input_187 = __VERIFIER_nondet_uchar() [L161] input_194 = __VERIFIER_nondet_uchar() [L162] input_200 = __VERIFIER_nondet_uchar() [L163] input_204 = __VERIFIER_nondet_uchar() [L164] input_214 = __VERIFIER_nondet_uchar() [L165] input_220 = __VERIFIER_nondet_uchar() [L166] input_227 = __VERIFIER_nondet_uchar() [L167] input_233 = __VERIFIER_nondet_uchar() [L168] input_237 = __VERIFIER_nondet_uchar() [L169] input_247 = __VERIFIER_nondet_uchar() [L170] input_253 = __VERIFIER_nondet_uchar() [L171] input_260 = __VERIFIER_nondet_uchar() [L172] input_266 = __VERIFIER_nondet_uchar() [L173] input_270 = __VERIFIER_nondet_uchar() [L174] input_280 = __VERIFIER_nondet_uchar() [L175] input_281 = __VERIFIER_nondet_uchar() [L176] input_282 = __VERIFIER_nondet_uchar() [L177] input_292 = __VERIFIER_nondet_uchar() [L178] input_302 = __VERIFIER_nondet_uchar() [L179] input_303 = __VERIFIER_nondet_uchar() [L180] input_304 = __VERIFIER_nondet_uchar() [L181] input_314 = __VERIFIER_nondet_uchar() [L182] input_324 = __VERIFIER_nondet_uchar() [L183] input_325 = __VERIFIER_nondet_uchar() [L184] input_326 = __VERIFIER_nondet_uchar() [L185] input_336 = __VERIFIER_nondet_uchar() [L188] SORT_1 var_7_arg_0 = state_4; [L189] var_7_arg_0 = var_7_arg_0 & mask_SORT_1 [L190] SORT_6 var_7 = var_7_arg_0; [L191] SORT_6 var_9_arg_0 = var_7; [L192] SORT_6 var_9_arg_1 = var_8; [L193] SORT_1 var_9 = var_9_arg_0 == var_9_arg_1; [L194] SORT_1 var_12_arg_0 = state_10; [L195] var_12_arg_0 = var_12_arg_0 & mask_SORT_1 [L196] SORT_6 var_12 = var_12_arg_0; [L197] SORT_6 var_13_arg_0 = var_12; [L198] SORT_6 var_13_arg_1 = var_8; [L199] SORT_1 var_13 = var_13_arg_0 == var_13_arg_1; [L200] SORT_1 var_14_arg_0 = var_9; [L201] SORT_1 var_14_arg_1 = var_13; [L202] SORT_1 var_14 = var_14_arg_0 & var_14_arg_1; [L203] SORT_1 var_15_arg_0 = state_10; [L204] var_15_arg_0 = var_15_arg_0 & mask_SORT_1 [L205] SORT_6 var_15 = var_15_arg_0; [L206] SORT_6 var_16_arg_0 = var_15; [L207] SORT_6 var_16_arg_1 = var_8; [L208] SORT_1 var_16 = var_16_arg_0 == var_16_arg_1; [L209] SORT_1 var_19_arg_0 = state_17; [L210] var_19_arg_0 = var_19_arg_0 & mask_SORT_1 [L211] SORT_6 var_19 = var_19_arg_0; [L212] SORT_6 var_20_arg_0 = var_19; [L213] SORT_6 var_20_arg_1 = var_8; [L214] SORT_1 var_20 = var_20_arg_0 == var_20_arg_1; [L215] SORT_1 var_21_arg_0 = var_16; [L216] SORT_1 var_21_arg_1 = var_20; [L217] SORT_1 var_21 = var_21_arg_0 & var_21_arg_1; [L218] SORT_1 var_22_arg_0 = var_14; [L219] SORT_1 var_22_arg_1 = var_21; [L220] SORT_1 var_22 = var_22_arg_0 | var_22_arg_1; [L221] SORT_1 var_23_arg_0 = state_17; [L222] var_23_arg_0 = var_23_arg_0 & mask_SORT_1 [L223] SORT_6 var_23 = var_23_arg_0; [L224] SORT_6 var_24_arg_0 = var_23; [L225] SORT_6 var_24_arg_1 = var_8; [L226] SORT_1 var_24 = var_24_arg_0 == var_24_arg_1; [L227] SORT_1 var_25_arg_0 = state_4; [L228] var_25_arg_0 = var_25_arg_0 & mask_SORT_1 [L229] SORT_6 var_25 = var_25_arg_0; [L230] SORT_6 var_26_arg_0 = var_25; [L231] SORT_6 var_26_arg_1 = var_8; [L232] SORT_1 var_26 = var_26_arg_0 == var_26_arg_1; [L233] SORT_1 var_27_arg_0 = var_24; [L234] SORT_1 var_27_arg_1 = var_26; [L235] SORT_1 var_27 = var_27_arg_0 & var_27_arg_1; [L236] SORT_1 var_28_arg_0 = var_22; [L237] SORT_1 var_28_arg_1 = var_27; [L238] SORT_1 var_28 = var_28_arg_0 | var_28_arg_1; [L239] SORT_1 var_29_arg_0 = var_28; [L240] SORT_1 var_29 = ~var_29_arg_0; [L241] SORT_1 var_33_arg_0 = var_29; [L242] SORT_1 var_33 = ~var_33_arg_0; [L243] SORT_1 var_34_arg_0 = var_32; [L244] SORT_1 var_34_arg_1 = var_33; [L245] SORT_1 var_34 = var_34_arg_0 & var_34_arg_1; [L246] var_34 = var_34 & mask_SORT_1 [L247] SORT_1 bad_35_arg_0 = var_34; [L248] CALL __VERIFIER_assert(!(bad_35_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-22 02:10:27,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Arbiter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 68aa30a409d960bbf9135edba3b497aa140aed92035337dcb9292c1552b8943f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 02:10:29,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:10:29,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:10:29,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:10:29,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:10:29,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:10:29,973 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:10:29,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:10:29,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:10:29,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:10:29,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:10:29,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:10:29,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:10:29,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:10:29,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:10:29,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:10:29,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:10:29,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:10:29,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:10:29,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:10:29,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:10:29,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:10:29,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:10:29,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:10:29,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:10:29,999 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:10:29,999 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:10:30,000 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:10:30,001 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:10:30,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:10:30,002 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:10:30,003 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:10:30,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:10:30,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:10:30,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:10:30,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:10:30,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:10:30,018 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:10:30,018 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:10:30,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:10:30,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:10:30,021 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-22 02:10:30,045 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:10:30,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:10:30,046 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:10:30,046 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:10:30,047 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:10:30,047 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:10:30,048 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:10:30,048 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:10:30,048 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:10:30,048 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:10:30,049 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:10:30,049 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:10:30,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:10:30,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:10:30,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:10:30,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:10:30,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:10:30,051 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 02:10:30,051 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-22 02:10:30,051 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-22 02:10:30,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:10:30,052 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:10:30,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:10:30,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:10:30,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-22 02:10:30,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:10:30,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:10:30,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:10:30,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:10:30,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:10:30,054 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-22 02:10:30,054 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-22 02:10:30,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:10:30,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:10:30,055 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-22 02:10:30,055 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68aa30a409d960bbf9135edba3b497aa140aed92035337dcb9292c1552b8943f [2022-11-22 02:10:30,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:10:30,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:10:30,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:10:30,469 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:10:30,469 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:10:30,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Arbiter.c [2022-11-22 02:10:33,583 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:10:33,842 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:10:33,843 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Arbiter.c [2022-11-22 02:10:33,857 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/data/d851ac6b0/6c249ec156e74004bc8bbd51f2e61ac2/FLAG46c41cc72 [2022-11-22 02:10:33,880 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/data/d851ac6b0/6c249ec156e74004bc8bbd51f2e61ac2 [2022-11-22 02:10:33,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:10:33,884 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:10:33,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:10:33,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:10:33,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:10:33,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:10:33" (1/1) ... [2022-11-22 02:10:33,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d399166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:33, skipping insertion in model container [2022-11-22 02:10:33,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:10:33" (1/1) ... [2022-11-22 02:10:33,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:10:33,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:10:34,115 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_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Arbiter.c[1107,1120] [2022-11-22 02:10:34,392 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:10:34,406 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:10:34,417 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_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Arbiter.c[1107,1120] [2022-11-22 02:10:34,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:10:34,594 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:10:34,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:34 WrapperNode [2022-11-22 02:10:34,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:10:34,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:10:34,596 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:10:34,596 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:10:34,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:34" (1/1) ... [2022-11-22 02:10:34,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:34" (1/1) ... [2022-11-22 02:10:34,692 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1095 [2022-11-22 02:10:34,692 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:10:34,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:10:34,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:10:34,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:10:34,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:34" (1/1) ... [2022-11-22 02:10:34,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:34" (1/1) ... [2022-11-22 02:10:34,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:34" (1/1) ... [2022-11-22 02:10:34,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:34" (1/1) ... [2022-11-22 02:10:34,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:34" (1/1) ... [2022-11-22 02:10:34,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:34" (1/1) ... [2022-11-22 02:10:34,800 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:34" (1/1) ... [2022-11-22 02:10:34,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:34" (1/1) ... [2022-11-22 02:10:34,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:10:34,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:10:34,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:10:34,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:10:34,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:34" (1/1) ... [2022-11-22 02:10:34,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:10:34,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:10:34,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:10:34,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:10:34,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:10:34,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:10:35,338 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:10:35,340 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:10:36,637 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:10:36,648 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:10:36,648 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 02:10:36,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:10:36 BoogieIcfgContainer [2022-11-22 02:10:36,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:10:36,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:10:36,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:10:36,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:10:36,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:10:33" (1/3) ... [2022-11-22 02:10:36,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22e0df37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:10:36, skipping insertion in model container [2022-11-22 02:10:36,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:34" (2/3) ... [2022-11-22 02:10:36,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22e0df37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:10:36, skipping insertion in model container [2022-11-22 02:10:36,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:10:36" (3/3) ... [2022-11-22 02:10:36,665 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_Arbiter.c [2022-11-22 02:10:36,687 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:10:36,687 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:10:36,753 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:10:36,760 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;@7f305982, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:10:36,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:10:36,766 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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) [2022-11-22 02:10:36,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 02:10:36,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:36,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 02:10:36,775 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:36,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:36,782 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-22 02:10:36,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:10:36,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832381227] [2022-11-22 02:10:36,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:36,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:10:36,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:10:36,814 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:10:36,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-22 02:10:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:37,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-22 02:10:37,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:10:37,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:10:37,585 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:10:37,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832381227] [2022-11-22 02:10:37,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832381227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:10:37,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:10:37,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:10:37,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224825343] [2022-11-22 02:10:37,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:10:37,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:10:37,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:10:37,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:10:37,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:10:37,651 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2022-11-22 02:10:37,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:10:37,844 INFO L93 Difference]: Finished difference Result 20 states and 30 transitions. [2022-11-22 02:10:37,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:10:37,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2022-11-22 02:10:37,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:10:37,857 INFO L225 Difference]: With dead ends: 20 [2022-11-22 02:10:37,857 INFO L226 Difference]: Without dead ends: 11 [2022-11-22 02:10:37,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:10:37,867 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:10:37,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:10:37,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-22 02:10:37,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2022-11-22 02:10:37,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2022-11-22 02:10:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-22 02:10:37,905 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-22 02:10:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:10:37,905 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-22 02:10:37,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2022-11-22 02:10:37,906 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-22 02:10:37,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 02:10:37,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:37,907 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-22 02:10:37,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:10:38,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:10:38,126 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:38,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:38,127 INFO L85 PathProgramCache]: Analyzing trace with hash 271073635, now seen corresponding path program 1 times [2022-11-22 02:10:38,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:10:38,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275737105] [2022-11-22 02:10:38,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:38,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:10:38,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:10:38,131 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:10:38,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-22 02:10:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:38,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-22 02:10:38,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:10:39,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:10:42,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:10:42,745 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:10:42,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275737105] [2022-11-22 02:10:42,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275737105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:10:42,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [202509217] [2022-11-22 02:10:42,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:42,747 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:10:42,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:10:42,749 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:10:42,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-22 02:10:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:43,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-22 02:10:43,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:10:44,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:10:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:10:46,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [202509217] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:10:46,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992422343] [2022-11-22 02:10:46,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:46,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:46,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:10:46,674 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:10:46,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:10:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:47,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-22 02:10:47,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:10:47,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:10:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:10:49,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992422343] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:10:49,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:10:49,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 15 [2022-11-22 02:10:49,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394047709] [2022-11-22 02:10:49,853 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:10:49,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 02:10:49,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:10:49,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 02:10:49,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-22 02:10:49,858 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 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) [2022-11-22 02:10:50,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:10:50,324 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-11-22 02:10:50,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:10:50,326 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 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 8 [2022-11-22 02:10:50,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:10:50,327 INFO L225 Difference]: With dead ends: 16 [2022-11-22 02:10:50,327 INFO L226 Difference]: Without dead ends: 14 [2022-11-22 02:10:50,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:10:50,328 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:10:50,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 24 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:10:50,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-22 02:10:50,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2022-11-22 02:10:50,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 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) [2022-11-22 02:10:50,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-11-22 02:10:50,333 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2022-11-22 02:10:50,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:10:50,333 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-11-22 02:10:50,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 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) [2022-11-22 02:10:50,333 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-11-22 02:10:50,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 02:10:50,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:50,334 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-22 02:10:50,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-22 02:10:50,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:10:50,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:10:50,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:10:50,952 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:50,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:50,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1020920393, now seen corresponding path program 2 times [2022-11-22 02:10:50,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:10:50,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928456718] [2022-11-22 02:10:50,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:10:50,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:10:50,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:10:50,962 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:10:50,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-22 02:10:51,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:10:51,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:10:51,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 1920 conjuncts, 185 conjunts are in the unsatisfiable core [2022-11-22 02:10:51,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:10:53,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:23:13,663 WARN L233 SmtUtils]: Spent 10.59m on a formula simplification. DAG size of input: 2395 DAG size of output: 304 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:23:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:14,126 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:23:14,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928456718] [2022-11-22 02:23:14,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1928456718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:23:14,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [340194010] [2022-11-22 02:23:14,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:23:14,128 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:23:14,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:23:14,134 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:23:14,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d3ba176-7bbe-4206-8e4f-6a6e684ede16/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-22 02:23:15,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:23:15,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:23:15,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 1920 conjuncts, 211 conjunts are in the unsatisfiable core [2022-11-22 02:23:15,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:17,185 INFO L328 TraceCheckSpWp]: Computing backward predicates...