./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n3_w16_d32_e0.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_84f3c429-3127-4101-83bb-31bf580d9431/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f3c429-3127-4101-83bb-31bf580d9431/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f3c429-3127-4101-83bb-31bf580d9431/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f3c429-3127-4101-83bb-31bf580d9431/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n3_w16_d32_e0.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f3c429-3127-4101-83bb-31bf580d9431/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f3c429-3127-4101-83bb-31bf580d9431/bin/utaipan-gh47qXpMRh --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 85883be7d910fcae305aa64243127dccb245d5629610ac9e7729bf839b02538d --- 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-2329fc7 [2022-12-14 08:01:18,471 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:01:18,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:01:18,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:01:18,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:01:18,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:01:18,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:01:18,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:01:18,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:01:18,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:01:18,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:01:18,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:01:18,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:01:18,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:01:18,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:01:18,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:01:18,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:01:18,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:01:18,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:01:18,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:01:18,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:01:18,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:01:18,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:01:18,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:01:18,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:01:18,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:01:18,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:01:18,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:01:18,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:01:18,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:01:18,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:01:18,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:01:18,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:01:18,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:01:18,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:01:18,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:01:18,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:01:18,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:01:18,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:01:18,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:01:18,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:01:18,522 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f3c429-3127-4101-83bb-31bf580d9431/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 08:01:18,537 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:01:18,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:01:18,537 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:01:18,537 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:01:18,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:01:18,538 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:01:18,538 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:01:18,538 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:01:18,538 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:01:18,538 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:01:18,538 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:01:18,538 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:01:18,538 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:01:18,538 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:01:18,538 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:01:18,538 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:01:18,539 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:01:18,539 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:01:18,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:01:18,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:01:18,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:01:18,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:01:18,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:01:18,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:01:18,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:01:18,540 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:01:18,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:01:18,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:01:18,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:01:18,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:01:18,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:01:18,540 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:01:18,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:01:18,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:01:18,541 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:01:18,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:01:18,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:01:18,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:01:18,541 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_84f3c429-3127-4101-83bb-31bf580d9431/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f3c429-3127-4101-83bb-31bf580d9431/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85883be7d910fcae305aa64243127dccb245d5629610ac9e7729bf839b02538d [2022-12-14 08:01:18,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:01:18,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:01:18,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:01:18,732 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:01:18,732 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:01:18,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f3c429-3127-4101-83bb-31bf580d9431/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n3_w16_d32_e0.c [2022-12-14 08:01:21,245 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:01:21,547 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:01:21,547 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f3c429-3127-4101-83bb-31bf580d9431/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n3_w16_d32_e0.c [2022-12-14 08:01:21,562 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f3c429-3127-4101-83bb-31bf580d9431/bin/utaipan-gh47qXpMRh/data/465d1279f/ea0c694f05f54588bc0e3d30470dbf37/FLAG056df2697 [2022-12-14 08:01:21,835 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f3c429-3127-4101-83bb-31bf580d9431/bin/utaipan-gh47qXpMRh/data/465d1279f/ea0c694f05f54588bc0e3d30470dbf37 [2022-12-14 08:01:21,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:01:21,849 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:01:21,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:01:21,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:01:21,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:01:21,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:01:21" (1/1) ... [2022-12-14 08:01:21,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dffce44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:21, skipping insertion in model container [2022-12-14 08:01:21,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:01:21" (1/1) ... [2022-12-14 08:01:21,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:01:22,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:01:22,132 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_84f3c429-3127-4101-83bb-31bf580d9431/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n3_w16_d32_e0.c[1110,1123] [2022-12-14 08:01:22,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:01:22,438 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:01:22,447 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_84f3c429-3127-4101-83bb-31bf580d9431/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n3_w16_d32_e0.c[1110,1123] [2022-12-14 08:01:22,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:01:22,620 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:01:22,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:22 WrapperNode [2022-12-14 08:01:22,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:01:22,622 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:01:22,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:01:22,622 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:01:22,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:22" (1/1) ... [2022-12-14 08:01:22,676 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:22" (1/1) ... [2022-12-14 08:01:22,831 INFO L138 Inliner]: procedures = 11, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3743 [2022-12-14 08:01:22,832 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:01:22,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:01:22,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:01:22,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:01:22,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:22" (1/1) ... [2022-12-14 08:01:22,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:22" (1/1) ... [2022-12-14 08:01:22,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:22" (1/1) ... [2022-12-14 08:01:22,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:22" (1/1) ... [2022-12-14 08:01:22,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:22" (1/1) ... [2022-12-14 08:01:22,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:22" (1/1) ... [2022-12-14 08:01:22,934 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:22" (1/1) ... [2022-12-14 08:01:22,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:22" (1/1) ... [2022-12-14 08:01:22,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:01:22,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:01:22,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:01:22,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:01:22,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:22" (1/1) ... [2022-12-14 08:01:22,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:01:22,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f3c429-3127-4101-83bb-31bf580d9431/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:01:22,994 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f3c429-3127-4101-83bb-31bf580d9431/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:01:22,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f3c429-3127-4101-83bb-31bf580d9431/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:01:23,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:01:23,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:01:23,030 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 08:01:23,030 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 08:01:23,457 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:01:23,459 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:04:46,429 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:04:46,577 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:04:46,577 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 08:04:46,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:04:46 BoogieIcfgContainer [2022-12-14 08:04:46,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:04:46,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:04:46,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:04:46,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:04:46,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:01:21" (1/3) ... [2022-12-14 08:04:46,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c153dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:04:46, skipping insertion in model container [2022-12-14 08:04:46,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:01:22" (2/3) ... [2022-12-14 08:04:46,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c153dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:04:46, skipping insertion in model container [2022-12-14 08:04:46,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:04:46" (3/3) ... [2022-12-14 08:04:46,585 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.arbitrated_top_n3_w16_d32_e0.c [2022-12-14 08:04:46,600 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:04:46,600 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:04:46,641 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:04:46,647 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;@5633761c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:04:46,647 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:04:46,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 08:04:46,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 08:04:46,657 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:04:46,657 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:04:46,658 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:04:46,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:04:46,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1240039111, now seen corresponding path program 1 times [2022-12-14 08:04:46,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:04:46,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228835309] [2022-12-14 08:04:46,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:46,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:05:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:05:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 08:05:19,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:05:19,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228835309] [2022-12-14 08:05:19,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228835309] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:05:19,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:05:19,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:05:19,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927537730] [2022-12-14 08:05:19,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:05:19,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:05:19,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:05:19,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:05:19,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:05:19,037 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-12-14 08:05:21,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 08:05:23,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 08:05:25,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 08:05:27,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 08:05:27,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:05:27,590 INFO L93 Difference]: Finished difference Result 78 states and 111 transitions. [2022-12-14 08:05:27,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:05:27,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 44 [2022-12-14 08:05:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:05:27,597 INFO L225 Difference]: With dead ends: 78 [2022-12-14 08:05:27,597 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 08:05:27,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:05:27,601 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 12 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:05:27,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 117 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 4 Unknown, 0 Unchecked, 8.5s Time] [2022-12-14 08:05:27,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 08:05:27,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-12-14 08:05:27,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 08:05:27,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2022-12-14 08:05:27,631 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 69 transitions. Word has length 44 [2022-12-14 08:05:27,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:05:27,632 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 69 transitions. [2022-12-14 08:05:27,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-12-14 08:05:27,632 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 69 transitions. [2022-12-14 08:05:27,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 08:05:27,634 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:05:27,634 INFO L195 NwaCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 08:05:27,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:05:27,635 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:05:27,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:05:27,635 INFO L85 PathProgramCache]: Analyzing trace with hash -14932083, now seen corresponding path program 1 times [2022-12-14 08:05:27,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:05:27,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487934999] [2022-12-14 08:05:27,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:05:27,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms