./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c66d7dec-9873-4439-a503-c1bf6004aeef/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c66d7dec-9873-4439-a503-c1bf6004aeef/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c66d7dec-9873-4439-a503-c1bf6004aeef/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c66d7dec-9873-4439-a503-c1bf6004aeef/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c66d7dec-9873-4439-a503-c1bf6004aeef/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c66d7dec-9873-4439-a503-c1bf6004aeef/bin/utaipan-G1rejxKTta --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 ef314c292717d2a6588e316ab1f60892c9568f1799857e58c021646ee7eb2cde --- 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-dbf71c6-m [2022-10-17 17:39:24,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:39:24,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:39:24,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:39:24,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:39:24,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:39:24,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:39:24,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:39:24,542 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:39:24,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:39:24,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:39:24,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:39:24,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:39:24,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:39:24,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:39:24,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:39:24,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:39:24,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:39:24,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:39:24,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:39:24,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:39:24,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:39:24,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:39:24,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:39:24,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:39:24,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:39:24,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:39:24,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:39:24,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:39:24,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:39:24,611 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:39:24,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:39:24,613 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:39:24,614 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:39:24,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:39:24,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:39:24,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:39:24,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:39:24,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:39:24,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:39:24,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:39:24,621 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c66d7dec-9873-4439-a503-c1bf6004aeef/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:39:24,652 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:39:24,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:39:24,653 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:39:24,653 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:39:24,654 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:39:24,654 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:39:24,655 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:39:24,655 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:39:24,655 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:39:24,656 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:39:24,656 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:39:24,656 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:39:24,657 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:39:24,657 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:39:24,657 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:39:24,658 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:39:24,658 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:39:24,658 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:39:24,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:39:24,660 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:39:24,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:39:24,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:39:24,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:39:24,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:39:24,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:39:24,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:39:24,662 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:39:24,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:39:24,662 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:39:24,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:39:24,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:39:24,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:39:24,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:39:24,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:39:24,664 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:39:24,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:39:24,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:39:24,665 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:39:24,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:39:24,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:39:24,666 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:39:24,667 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_c66d7dec-9873-4439-a503-c1bf6004aeef/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c66d7dec-9873-4439-a503-c1bf6004aeef/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef314c292717d2a6588e316ab1f60892c9568f1799857e58c021646ee7eb2cde [2022-10-17 17:39:25,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:39:25,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:39:25,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:39:25,101 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:39:25,102 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:39:25,103 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c66d7dec-9873-4439-a503-c1bf6004aeef/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c [2022-10-17 17:39:25,192 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c66d7dec-9873-4439-a503-c1bf6004aeef/bin/utaipan-G1rejxKTta/data/ccaf8351a/bc95d426f453496984d38e8da36099c7/FLAGb19d35a00 [2022-10-17 17:39:26,337 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:39:26,339 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c66d7dec-9873-4439-a503-c1bf6004aeef/sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c [2022-10-17 17:39:26,408 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c66d7dec-9873-4439-a503-c1bf6004aeef/bin/utaipan-G1rejxKTta/data/ccaf8351a/bc95d426f453496984d38e8da36099c7/FLAGb19d35a00 [2022-10-17 17:39:26,609 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c66d7dec-9873-4439-a503-c1bf6004aeef/bin/utaipan-G1rejxKTta/data/ccaf8351a/bc95d426f453496984d38e8da36099c7 [2022-10-17 17:39:26,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:39:26,615 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:39:26,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:39:26,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:39:26,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:39:26,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:39:26" (1/1) ... [2022-10-17 17:39:26,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22836903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:26, skipping insertion in model container [2022-10-17 17:39:26,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:39:26" (1/1) ... [2022-10-17 17:39:26,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:39:26,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:39:29,832 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_c66d7dec-9873-4439-a503-c1bf6004aeef/sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c[377069,377082] [2022-10-17 17:39:29,911 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_c66d7dec-9873-4439-a503-c1bf6004aeef/sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c[383339,383352] [2022-10-17 17:39:30,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:39:30,288 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:39:31,863 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_c66d7dec-9873-4439-a503-c1bf6004aeef/sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c[377069,377082] [2022-10-17 17:39:31,876 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_c66d7dec-9873-4439-a503-c1bf6004aeef/sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c[383339,383352] [2022-10-17 17:39:31,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:39:32,054 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:39:32,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32 WrapperNode [2022-10-17 17:39:32,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:39:32,057 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:39:32,057 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:39:32,058 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:39:32,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:32,232 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:32,854 INFO L138 Inliner]: procedures = 58, calls = 62, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 12909 [2022-10-17 17:39:32,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:39:32,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:39:32,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:39:32,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:39:32,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:32,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:33,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:33,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:33,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:33,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:33,806 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:33,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:33,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:39:33,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:39:33,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:39:33,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:39:33,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:33,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:39:33,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c66d7dec-9873-4439-a503-c1bf6004aeef/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:33,986 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c66d7dec-9873-4439-a503-c1bf6004aeef/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:39:34,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c66d7dec-9873-4439-a503-c1bf6004aeef/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:39:34,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:39:34,054 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-10-17 17:39:34,054 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-10-17 17:39:34,054 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-10-17 17:39:34,054 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-10-17 17:39:34,054 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-10-17 17:39:34,055 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-10-17 17:39:34,055 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-10-17 17:39:34,055 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-10-17 17:39:34,055 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-10-17 17:39:34,055 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-10-17 17:39:34,055 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-10-17 17:39:34,056 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-10-17 17:39:34,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:39:34,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:39:34,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:39:34,236 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:39:34,244 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:39:45,490 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:39:48,437 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:39:48,438 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-10-17 17:39:48,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:39:48 BoogieIcfgContainer [2022-10-17 17:39:48,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:39:48,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:39:48,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:39:48,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:39:48,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:39:26" (1/3) ... [2022-10-17 17:39:48,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12337faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:39:48, skipping insertion in model container [2022-10-17 17:39:48,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (2/3) ... [2022-10-17 17:39:48,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12337faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:39:48, skipping insertion in model container [2022-10-17 17:39:48,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:39:48" (3/3) ... [2022-10-17 17:39:48,459 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label40+token_ring.07.cil-1.c [2022-10-17 17:39:48,485 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:39:48,485 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-10-17 17:39:48,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:39:48,634 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;@2d47d9d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:39:48,634 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 17:39:48,649 INFO L276 IsEmpty]: Start isEmpty. Operand has 1776 states, 1746 states have (on average 1.9662084765177548) internal successors, (3433), 1749 states have internal predecessors, (3433), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-10-17 17:39:48,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-10-17 17:39:48,665 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:48,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:48,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:48,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:48,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1071868383, now seen corresponding path program 1 times [2022-10-17 17:39:48,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:48,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782640988] [2022-10-17 17:39:48,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:48,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:39:49,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:49,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782640988] [2022-10-17 17:39:49,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782640988] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:49,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:49,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:39:49,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134086234] [2022-10-17 17:39:49,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:49,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:39:49,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:49,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:39:49,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:39:49,453 INFO L87 Difference]: Start difference. First operand has 1776 states, 1746 states have (on average 1.9662084765177548) internal successors, (3433), 1749 states have internal predecessors, (3433), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:39:50,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:50,883 INFO L93 Difference]: Finished difference Result 3668 states and 7147 transitions. [2022-10-17 17:39:50,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:39:50,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2022-10-17 17:39:50,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:50,918 INFO L225 Difference]: With dead ends: 3668 [2022-10-17 17:39:50,918 INFO L226 Difference]: Without dead ends: 1891 [2022-10-17 17:39:50,929 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 [2022-10-17 17:39:50,934 INFO L413 NwaCegarLoop]: 3361 mSDtfsCounter, 3614 mSDsluCounter, 3561 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3614 SdHoareTripleChecker+Valid, 6644 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:50,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3614 Valid, 6644 Invalid, 660 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-17 17:39:50,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2022-10-17 17:39:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1890. [2022-10-17 17:39:51,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1838 states have (on average 1.9368879216539716) internal successors, (3560), 1841 states have internal predecessors, (3560), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2022-10-17 17:39:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 3636 transitions. [2022-10-17 17:39:51,156 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 3636 transitions. Word has length 52 [2022-10-17 17:39:51,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:51,157 INFO L495 AbstractCegarLoop]: Abstraction has 1890 states and 3636 transitions. [2022-10-17 17:39:51,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:39:51,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 3636 transitions. [2022-10-17 17:39:51,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-10-17 17:39:51,167 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:51,168 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:51,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:39:51,169 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:51,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:51,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1856739895, now seen corresponding path program 1 times [2022-10-17 17:39:51,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:51,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406014991] [2022-10-17 17:39:51,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:51,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat