./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w16_d64_e0.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_af4833ba-0174-454b-bd92-f9faab46d91c/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4833ba-0174-454b-bd92-f9faab46d91c/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4833ba-0174-454b-bd92-f9faab46d91c/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4833ba-0174-454b-bd92-f9faab46d91c/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w16_d64_e0.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4833ba-0174-454b-bd92-f9faab46d91c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4833ba-0174-454b-bd92-f9faab46d91c/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b7649a6a44221c61051bc860d7e6be016b686d123220ec1fd34eb89a0855228e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:54:46,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:54:46,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:54:46,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:54:46,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:54:46,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:54:46,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:54:46,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:54:46,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:54:46,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:54:46,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:54:46,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:54:46,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:54:46,235 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:54:46,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:54:46,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:54:46,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:54:46,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:54:46,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:54:46,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:54:46,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:54:46,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:54:46,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:54:46,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:54:46,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:54:46,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:54:46,268 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:54:46,269 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:54:46,270 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:54:46,271 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:54:46,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:54:46,274 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:54:46,276 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:54:46,277 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:54:46,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:54:46,280 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:54:46,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:54:46,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:54:46,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:54:46,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:54:46,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:54:46,285 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4833ba-0174-454b-bd92-f9faab46d91c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:54:46,329 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:54:46,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:54:46,330 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:54:46,330 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:54:46,331 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:54:46,332 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:54:46,332 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:54:46,332 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:54:46,332 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:54:46,333 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:54:46,334 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:54:46,334 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:54:46,334 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:54:46,334 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:54:46,335 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:54:46,335 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:54:46,335 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:54:46,335 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:54:46,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:54:46,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:54:46,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:54:46,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:54:46,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:54:46,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:54:46,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:54:46,339 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:54:46,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:54:46,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:54:46,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:54:46,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:54:46,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:54:46,341 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:54:46,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:54:46,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:54:46,341 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:54:46,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:54:46,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:54:46,342 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:54:46,343 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_af4833ba-0174-454b-bd92-f9faab46d91c/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4833ba-0174-454b-bd92-f9faab46d91c/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7649a6a44221c61051bc860d7e6be016b686d123220ec1fd34eb89a0855228e [2022-11-03 03:54:46,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:54:46,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:54:46,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:54:46,673 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:54:46,674 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:54:46,675 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4833ba-0174-454b-bd92-f9faab46d91c/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w16_d64_e0.c [2022-11-03 03:54:46,747 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4833ba-0174-454b-bd92-f9faab46d91c/bin/utaipan-7li7fVZpFI/data/012252b86/66d0a3eb9fda44edb45a2f1d0eec482a/FLAG6c0fc1ad8 [2022-11-03 03:54:47,443 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:54:47,444 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4833ba-0174-454b-bd92-f9faab46d91c/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w16_d64_e0.c [2022-11-03 03:54:47,475 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4833ba-0174-454b-bd92-f9faab46d91c/bin/utaipan-7li7fVZpFI/data/012252b86/66d0a3eb9fda44edb45a2f1d0eec482a/FLAG6c0fc1ad8 [2022-11-03 03:54:47,584 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4833ba-0174-454b-bd92-f9faab46d91c/bin/utaipan-7li7fVZpFI/data/012252b86/66d0a3eb9fda44edb45a2f1d0eec482a [2022-11-03 03:54:47,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:54:47,592 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:54:47,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:54:47,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:54:47,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:54:47,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:54:47" (1/1) ... [2022-11-03 03:54:47,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b40fb14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:47, skipping insertion in model container [2022-11-03 03:54:47,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:54:47" (1/1) ... [2022-11-03 03:54:47,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:54:47,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:54:48,027 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4833ba-0174-454b-bd92-f9faab46d91c/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w16_d64_e0.c[1110,1123] [2022-11-03 03:54:48,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:54:48,685 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:54:48,696 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4833ba-0174-454b-bd92-f9faab46d91c/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w16_d64_e0.c[1110,1123] [2022-11-03 03:54:49,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:54:49,027 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:54:49,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:49 WrapperNode [2022-11-03 03:54:49,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:54:49,029 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:54:49,030 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:54:49,030 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:54:49,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:49" (1/1) ... [2022-11-03 03:54:49,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:49" (1/1) ... [2022-11-03 03:54:49,651 INFO L138 Inliner]: procedures = 11, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 6093 [2022-11-03 03:54:49,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:54:49,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:54:49,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:54:49,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:54:49,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:49" (1/1) ... [2022-11-03 03:54:49,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:49" (1/1) ... [2022-11-03 03:54:49,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:49" (1/1) ... [2022-11-03 03:54:49,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:49" (1/1) ... [2022-11-03 03:54:50,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:49" (1/1) ... [2022-11-03 03:54:50,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:49" (1/1) ... [2022-11-03 03:54:50,126 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:49" (1/1) ... [2022-11-03 03:54:50,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:49" (1/1) ... [2022-11-03 03:54:50,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:54:50,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:54:50,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:54:50,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:54:50,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:49" (1/1) ... [2022-11-03 03:54:50,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:54:50,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4833ba-0174-454b-bd92-f9faab46d91c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:50,250 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4833ba-0174-454b-bd92-f9faab46d91c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:54:50,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af4833ba-0174-454b-bd92-f9faab46d91c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:54:50,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:54:50,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:54:50,300 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 03:54:50,301 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 03:54:51,307 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:54:51,309 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:55:07,026 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:55:24,556 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:55:24,556 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:55:24,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:55:24 BoogieIcfgContainer [2022-11-03 03:55:24,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:55:24,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:55:24,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:55:24,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:55:24,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:54:47" (1/3) ... [2022-11-03 03:55:24,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71dff5fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:55:24, skipping insertion in model container [2022-11-03 03:55:24,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:49" (2/3) ... [2022-11-03 03:55:24,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71dff5fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:55:24, skipping insertion in model container [2022-11-03 03:55:24,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:55:24" (3/3) ... [2022-11-03 03:55:24,569 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.arbitrated_top_n2_w16_d64_e0.c [2022-11-03 03:55:24,589 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:55:24,589 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:55:24,634 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:55:24,641 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;@ff26678, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:55:24,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:55:24,646 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 03:55:24,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 03:55:24,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:55:24,655 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:55:24,655 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:55:24,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:55:24,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1571548282, now seen corresponding path program 1 times [2022-11-03 03:55:24,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:55:24,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094635757] [2022-11-03 03:55:24,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:55:24,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 03:56:33,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:33,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094635757] [2022-11-03 03:56:33,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094635757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:33,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:33,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:33,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817969890] [2022-11-03 03:56:33,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:33,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:33,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:33,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:33,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:33,937 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 03:56:36,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 03:56:38,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 03:56:38,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:38,699 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2022-11-03 03:56:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:56:38,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 32 [2022-11-03 03:56:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:38,710 INFO L225 Difference]: With dead ends: 60 [2022-11-03 03:56:38,710 INFO L226 Difference]: Without dead ends: 38 [2022-11-03 03:56:38,713 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 [2022-11-03 03:56:38,716 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:38,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 61 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-11-03 03:56:38,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-03 03:56:38,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-03 03:56:38,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-03 03:56:38,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2022-11-03 03:56:38,768 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 32 [2022-11-03 03:56:38,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:38,770 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2022-11-03 03:56:38,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 03:56:38,770 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2022-11-03 03:56:38,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:56:38,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:38,774 INFO L195 NwaCegarLoop]: trace histogram [14, 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] [2022-11-03 03:56:38,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:56:38,774 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:38,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:38,775 INFO L85 PathProgramCache]: Analyzing trace with hash -522847093, now seen corresponding path program 1 times [2022-11-03 03:56:38,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:38,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397160720] [2022-11-03 03:56:38,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:38,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms