./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed1def3f-a163-4200-a24d-cd2d654d2f76/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed1def3f-a163-4200-a24d-cd2d654d2f76/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed1def3f-a163-4200-a24d-cd2d654d2f76/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed1def3f-a163-4200-a24d-cd2d654d2f76/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed1def3f-a163-4200-a24d-cd2d654d2f76/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed1def3f-a163-4200-a24d-cd2d654d2f76/bin/utaipan-eEHZpOm5b7 --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 d0cee5b1964cd71f7406ad577c9568bfea84778de80728dfc08113baa4a027fc --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:23:13,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:23:13,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:23:13,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:23:13,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:23:13,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:23:13,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:23:13,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:23:13,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:23:13,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:23:13,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:23:13,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:23:13,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:23:13,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:23:13,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:23:13,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:23:13,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:23:13,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:23:13,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:23:13,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:23:13,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:23:13,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:23:13,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:23:13,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:23:13,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:23:13,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:23:13,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:23:13,419 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:23:13,420 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:23:13,421 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:23:13,422 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:23:13,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:23:13,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:23:13,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:23:13,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:23:13,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:23:13,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:23:13,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:23:13,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:23:13,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:23:13,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:23:13,433 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed1def3f-a163-4200-a24d-cd2d654d2f76/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:23:13,476 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:23:13,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:23:13,477 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:23:13,477 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:23:13,484 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:23:13,485 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:23:13,485 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:23:13,485 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:23:13,486 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:23:13,486 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:23:13,487 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:23:13,488 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:23:13,488 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:23:13,488 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:23:13,488 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:23:13,489 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:23:13,489 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:23:13,489 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:23:13,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:23:13,491 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:23:13,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:23:13,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:23:13,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:23:13,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:23:13,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:23:13,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:23:13,495 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:23:13,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:23:13,495 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:23:13,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:23:13,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:23:13,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:23:13,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:23:13,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:23:13,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:23:13,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:23:13,498 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:23:13,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:23:13,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:23:13,499 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:23:13,499 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:23:13,499 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_ed1def3f-a163-4200-a24d-cd2d654d2f76/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed1def3f-a163-4200-a24d-cd2d654d2f76/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0cee5b1964cd71f7406ad577c9568bfea84778de80728dfc08113baa4a027fc [2021-11-25 19:23:13,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:23:13,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:23:13,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:23:13,880 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:23:13,881 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:23:13,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed1def3f-a163-4200-a24d-cd2d654d2f76/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c [2021-11-25 19:23:13,966 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed1def3f-a163-4200-a24d-cd2d654d2f76/bin/utaipan-eEHZpOm5b7/data/e85a6bc5d/427ae7a318c04f39a3262469d8f5df13/FLAG63525b697 [2021-11-25 19:23:14,565 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:23:14,566 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed1def3f-a163-4200-a24d-cd2d654d2f76/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c [2021-11-25 19:23:14,585 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed1def3f-a163-4200-a24d-cd2d654d2f76/bin/utaipan-eEHZpOm5b7/data/e85a6bc5d/427ae7a318c04f39a3262469d8f5df13/FLAG63525b697 [2021-11-25 19:23:14,891 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed1def3f-a163-4200-a24d-cd2d654d2f76/bin/utaipan-eEHZpOm5b7/data/e85a6bc5d/427ae7a318c04f39a3262469d8f5df13 [2021-11-25 19:23:14,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:23:14,896 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:23:14,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:23:14,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:23:14,905 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:23:14,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:23:14" (1/1) ... [2021-11-25 19:23:14,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31042e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:14, skipping insertion in model container [2021-11-25 19:23:14,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:23:14" (1/1) ... [2021-11-25 19:23:14,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:23:14,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:23:15,184 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_ed1def3f-a163-4200-a24d-cd2d654d2f76/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c[6940,6953] [2021-11-25 19:23:15,195 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:23:15,203 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:23:15,245 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_ed1def3f-a163-4200-a24d-cd2d654d2f76/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c[6940,6953] [2021-11-25 19:23:15,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:23:15,260 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:23:15,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:15 WrapperNode [2021-11-25 19:23:15,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:23:15,262 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:23:15,262 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:23:15,262 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:23:15,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:15" (1/1) ... [2021-11-25 19:23:15,279 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:15" (1/1) ... [2021-11-25 19:23:15,311 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 253 [2021-11-25 19:23:15,312 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:23:15,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:23:15,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:23:15,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:23:15,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:15" (1/1) ... [2021-11-25 19:23:15,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:15" (1/1) ... [2021-11-25 19:23:15,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:15" (1/1) ... [2021-11-25 19:23:15,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:15" (1/1) ... [2021-11-25 19:23:15,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:15" (1/1) ... [2021-11-25 19:23:15,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:15" (1/1) ... [2021-11-25 19:23:15,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:15" (1/1) ... [2021-11-25 19:23:15,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:23:15,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:23:15,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:23:15,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:23:15,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:15" (1/1) ... [2021-11-25 19:23:15,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:23:15,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed1def3f-a163-4200-a24d-cd2d654d2f76/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:23:15,400 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed1def3f-a163-4200-a24d-cd2d654d2f76/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:23:15,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed1def3f-a163-4200-a24d-cd2d654d2f76/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:23:15,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:23:15,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:23:15,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:23:15,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:23:15,515 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:23:15,519 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:23:16,000 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:23:16,512 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:23:16,512 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:23:16,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:23:16 BoogieIcfgContainer [2021-11-25 19:23:16,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:23:16,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:23:16,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:23:16,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:23:16,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:23:14" (1/3) ... [2021-11-25 19:23:16,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a694f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:23:16, skipping insertion in model container [2021-11-25 19:23:16,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:15" (2/3) ... [2021-11-25 19:23:16,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a694f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:23:16, skipping insertion in model container [2021-11-25 19:23:16,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:23:16" (3/3) ... [2021-11-25 19:23:16,527 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c [2021-11-25 19:23:16,533 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:23:16,533 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:23:16,586 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:23:16,594 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:23:16,595 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:23:16,609 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:16,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 19:23:16,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:23:16,624 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 19:23:16,624 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:23:16,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:23:16,630 INFO L85 PathProgramCache]: Analyzing trace with hash 15201954, now seen corresponding path program 1 times [2021-11-25 19:23:16,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:23:16,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754138569] [2021-11-25 19:23:16,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:23:16,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:23:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:23:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:23:17,330 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:23:17,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754138569] [2021-11-25 19:23:17,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754138569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:23:17,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:23:17,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:23:17,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665260022] [2021-11-25 19:23:17,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:23:17,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:23:17,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:23:17,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:23:17,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:23:17,378 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:17,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:23:17,449 INFO L93 Difference]: Finished difference Result 16 states and 22 transitions. [2021-11-25 19:23:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:23:17,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-25 19:23:17,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:23:17,460 INFO L225 Difference]: With dead ends: 16 [2021-11-25 19:23:17,461 INFO L226 Difference]: Without dead ends: 10 [2021-11-25 19:23:17,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:23:17,469 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:23:17,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:23:17,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-25 19:23:17,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2021-11-25 19:23:17,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:17,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-25 19:23:17,510 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2021-11-25 19:23:17,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:23:17,510 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-25 19:23:17,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:17,513 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-25 19:23:17,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:23:17,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:23:17,515 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-11-25 19:23:17,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:23:17,516 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:23:17,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:23:17,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1915037712, now seen corresponding path program 1 times [2021-11-25 19:23:17,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:23:17,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835261019] [2021-11-25 19:23:17,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:23:17,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:23:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:23:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:23:18,992 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:23:18,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835261019] [2021-11-25 19:23:18,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835261019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:23:18,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218750348] [2021-11-25 19:23:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:23:18,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:23:18,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed1def3f-a163-4200-a24d-cd2d654d2f76/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:23:18,996 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed1def3f-a163-4200-a24d-cd2d654d2f76/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:23:19,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed1def3f-a163-4200-a24d-cd2d654d2f76/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:23:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:23:19,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-25 19:23:19,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:23:23,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:23:23,163 INFO L328 TraceCheckSpWp]: Computing backward predicates...