./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/xcsp/Dubois-020.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_fd3b9b10-112f-4221-b842-d1eff482f375/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3b9b10-112f-4221-b842-d1eff482f375/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3b9b10-112f-4221-b842-d1eff482f375/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3b9b10-112f-4221-b842-d1eff482f375/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/xcsp/Dubois-020.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3b9b10-112f-4221-b842-d1eff482f375/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3b9b10-112f-4221-b842-d1eff482f375/bin/utaipan-Q6hlc19bkW --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 32bit --witnessprinter.graph.data.programhash 93d5a5d399a9dd6cd6b636e570174f8a08707ae74dd799252569e666733011b7 --- 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-4e7fbc6 [2022-11-23 14:35:54,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:35:54,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:35:54,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:35:54,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:35:54,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:35:54,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:35:54,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:35:54,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:35:54,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:35:54,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:35:54,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:35:54,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:35:54,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:35:54,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:35:54,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:35:54,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:35:54,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:35:54,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:35:54,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:35:54,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:35:54,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:35:54,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:35:54,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:35:54,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:35:54,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:35:54,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:35:54,342 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:35:54,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:35:54,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:35:54,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:35:54,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:35:54,346 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:35:54,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:35:54,355 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:35:54,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:35:54,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:35:54,357 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:35:54,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:35:54,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:35:54,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:35:54,364 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3b9b10-112f-4221-b842-d1eff482f375/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:35:54,418 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:35:54,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:35:54,419 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:35:54,419 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:35:54,420 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:35:54,421 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:35:54,421 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:35:54,421 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:35:54,421 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:35:54,422 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:35:54,423 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:35:54,423 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:35:54,424 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:35:54,424 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:35:54,424 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:35:54,424 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:35:54,425 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:35:54,425 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:35:54,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:35:54,427 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:35:54,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:35:54,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:35:54,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:35:54,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:35:54,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:35:54,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:35:54,429 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:35:54,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:35:54,429 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:35:54,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:35:54,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:35:54,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:35:54,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:35:54,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:35:54,431 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:35:54,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:35:54,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:35:54,432 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:35:54,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:35:54,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:35:54,433 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:35:54,433 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_fd3b9b10-112f-4221-b842-d1eff482f375/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3b9b10-112f-4221-b842-d1eff482f375/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93d5a5d399a9dd6cd6b636e570174f8a08707ae74dd799252569e666733011b7 [2022-11-23 14:35:54,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:35:54,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:35:54,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:35:54,867 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:35:54,868 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:35:54,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3b9b10-112f-4221-b842-d1eff482f375/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/xcsp/Dubois-020.c [2022-11-23 14:35:58,503 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:35:58,771 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:35:58,772 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3b9b10-112f-4221-b842-d1eff482f375/sv-benchmarks/c/xcsp/Dubois-020.c [2022-11-23 14:35:58,789 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3b9b10-112f-4221-b842-d1eff482f375/bin/utaipan-Q6hlc19bkW/data/db9754c39/18ee3de877ab47f8bdbd959ac9e32c5b/FLAGa6c4d04c5 [2022-11-23 14:35:58,829 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3b9b10-112f-4221-b842-d1eff482f375/bin/utaipan-Q6hlc19bkW/data/db9754c39/18ee3de877ab47f8bdbd959ac9e32c5b [2022-11-23 14:35:58,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:35:58,835 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:35:58,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:35:58,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:35:58,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:35:58,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:35:58" (1/1) ... [2022-11-23 14:35:58,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29ff36cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:58, skipping insertion in model container [2022-11-23 14:35:58,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:35:58" (1/1) ... [2022-11-23 14:35:58,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:35:58,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:35:59,393 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_fd3b9b10-112f-4221-b842-d1eff482f375/sv-benchmarks/c/xcsp/Dubois-020.c[14400,14413] [2022-11-23 14:35:59,547 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:35:59,561 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:35:59,671 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_fd3b9b10-112f-4221-b842-d1eff482f375/sv-benchmarks/c/xcsp/Dubois-020.c[14400,14413] [2022-11-23 14:35:59,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:35:59,780 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:35:59,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:59 WrapperNode [2022-11-23 14:35:59,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:35:59,782 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:35:59,783 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:35:59,783 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:35:59,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:59" (1/1) ... [2022-11-23 14:35:59,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:59" (1/1) ... [2022-11-23 14:36:04,491 INFO L138 Inliner]: procedures = 13, calls = 167, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 417 [2022-11-23 14:36:04,492 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:36:04,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:36:04,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:36:04,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:36:04,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:59" (1/1) ... [2022-11-23 14:36:04,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:59" (1/1) ... [2022-11-23 14:36:05,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:59" (1/1) ... [2022-11-23 14:36:05,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:59" (1/1) ... [2022-11-23 14:36:08,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:59" (1/1) ... [2022-11-23 14:36:08,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:59" (1/1) ... [2022-11-23 14:36:08,235 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:59" (1/1) ... [2022-11-23 14:36:08,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:59" (1/1) ... [2022-11-23 14:36:08,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:36:08,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:36:08,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:36:08,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:36:08,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:59" (1/1) ... [2022-11-23 14:36:08,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:36:08,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3b9b10-112f-4221-b842-d1eff482f375/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:36:08,882 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3b9b10-112f-4221-b842-d1eff482f375/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:36:08,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3b9b10-112f-4221-b842-d1eff482f375/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:36:08,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:36:08,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:36:08,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:36:08,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:36:08,949 INFO L130 BoogieDeclarations]: Found specification of procedure assume [2022-11-23 14:36:08,949 INFO L138 BoogieDeclarations]: Found implementation of procedure assume [2022-11-23 14:36:09,131 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:36:09,146 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:36:16,452 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:36:16,497 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:36:16,509 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 14:36:16,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:36:16 BoogieIcfgContainer [2022-11-23 14:36:16,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:36:16,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:36:16,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:36:16,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:36:16,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:35:58" (1/3) ... [2022-11-23 14:36:16,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@252921af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:36:16, skipping insertion in model container [2022-11-23 14:36:16,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:59" (2/3) ... [2022-11-23 14:36:16,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@252921af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:36:16, skipping insertion in model container [2022-11-23 14:36:16,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:36:16" (3/3) ... [2022-11-23 14:36:16,529 INFO L112 eAbstractionObserver]: Analyzing ICFG Dubois-020.c [2022-11-23 14:36:16,553 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:36:16,553 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:36:16,650 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:36:16,663 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;@24b4de3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:36:16,663 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:36:16,670 INFO L276 IsEmpty]: Start isEmpty. Operand has 226 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 64 states have internal predecessors, (64), 160 states have call successors, (160), 1 states have call predecessors, (160), 1 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2022-11-23 14:36:16,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2022-11-23 14:36:16,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:16,711 INFO L195 NwaCegarLoop]: trace histogram [160, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:16,712 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:36:16,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:16,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1648124311, now seen corresponding path program 1 times [2022-11-23 14:36:16,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:36:16,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055344712] [2022-11-23 14:36:16,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:16,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:36:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat