./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.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_93f104fe-5c35-4ade-a802-1af18a51b8f1/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f104fe-5c35-4ade-a802-1af18a51b8f1/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_93f104fe-5c35-4ade-a802-1af18a51b8f1/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f104fe-5c35-4ade-a802-1af18a51b8f1/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f104fe-5c35-4ade-a802-1af18a51b8f1/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_93f104fe-5c35-4ade-a802-1af18a51b8f1/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 8b411c6ac71505d2c5059a06fd3211eebca89561d9ac8be37f9ecc9ff82a7a16 --- 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 17:11:57,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:11:57,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:11:57,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:11:57,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:11:57,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:11:57,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:11:57,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:11:57,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:11:57,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:11:57,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:11:57,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:11:57,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:11:57,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:11:57,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:11:57,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:11:57,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:11:57,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:11:57,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:11:57,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:11:57,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:11:57,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:11:57,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:11:57,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:11:57,624 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:11:57,625 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:11:57,625 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:11:57,627 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:11:57,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:11:57,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:11:57,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:11:57,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:11:57,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:11:57,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:11:57,638 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:11:57,638 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:11:57,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:11:57,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:11:57,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:11:57,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:11:57,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:11:57,642 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f104fe-5c35-4ade-a802-1af18a51b8f1/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:11:57,690 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:11:57,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:11:57,691 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:11:57,691 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:11:57,692 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:11:57,693 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:11:57,693 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:11:57,693 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:11:57,693 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:11:57,693 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:11:57,695 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:11:57,695 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:11:57,695 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:11:57,705 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:11:57,705 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:11:57,705 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:11:57,706 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:11:57,706 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:11:57,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:11:57,707 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:11:57,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:11:57,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:11:57,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:11:57,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:11:57,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:11:57,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:11:57,710 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:11:57,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:11:57,711 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:11:57,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:11:57,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:11:57,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:11:57,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:11:57,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:11:57,712 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:11:57,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:11:57,713 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:11:57,713 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:11:57,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:11:57,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:11:57,714 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:11:57,714 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_93f104fe-5c35-4ade-a802-1af18a51b8f1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f104fe-5c35-4ade-a802-1af18a51b8f1/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b411c6ac71505d2c5059a06fd3211eebca89561d9ac8be37f9ecc9ff82a7a16 [2022-10-17 17:11:58,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:11:58,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:11:58,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:11:58,036 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:11:58,036 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:11:58,038 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f104fe-5c35-4ade-a802-1af18a51b8f1/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c [2022-10-17 17:11:58,119 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f104fe-5c35-4ade-a802-1af18a51b8f1/bin/utaipan-G1rejxKTta/data/11123d4bd/24c21295c590420c870868fe62685e68/FLAG77ef24dde [2022-10-17 17:11:58,708 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:11:58,708 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f104fe-5c35-4ade-a802-1af18a51b8f1/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c [2022-10-17 17:11:58,723 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f104fe-5c35-4ade-a802-1af18a51b8f1/bin/utaipan-G1rejxKTta/data/11123d4bd/24c21295c590420c870868fe62685e68/FLAG77ef24dde [2022-10-17 17:11:59,022 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f104fe-5c35-4ade-a802-1af18a51b8f1/bin/utaipan-G1rejxKTta/data/11123d4bd/24c21295c590420c870868fe62685e68 [2022-10-17 17:11:59,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:11:59,029 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:11:59,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:11:59,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:11:59,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:11:59,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:11:59" (1/1) ... [2022-10-17 17:11:59,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73cc999e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:11:59, skipping insertion in model container [2022-10-17 17:11:59,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:11:59" (1/1) ... [2022-10-17 17:11:59,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:11:59,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:11:59,292 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_93f104fe-5c35-4ade-a802-1af18a51b8f1/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c[914,927] [2022-10-17 17:11:59,369 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_93f104fe-5c35-4ade-a802-1af18a51b8f1/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c[7115,7128] [2022-10-17 17:11:59,429 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:11:59,440 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:11:59,451 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_93f104fe-5c35-4ade-a802-1af18a51b8f1/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c[914,927] [2022-10-17 17:11:59,482 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_93f104fe-5c35-4ade-a802-1af18a51b8f1/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c[7115,7128] [2022-10-17 17:11:59,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:11:59,538 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:11:59,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:11:59 WrapperNode [2022-10-17 17:11:59,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:11:59,540 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:11:59,540 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:11:59,540 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:11:59,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:11:59" (1/1) ... [2022-10-17 17:11:59,561 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:11:59" (1/1) ... [2022-10-17 17:11:59,605 INFO L138 Inliner]: procedures = 63, calls = 73, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 639 [2022-10-17 17:11:59,606 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:11:59,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:11:59,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:11:59,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:11:59,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:11:59" (1/1) ... [2022-10-17 17:11:59,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:11:59" (1/1) ... [2022-10-17 17:11:59,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:11:59" (1/1) ... [2022-10-17 17:11:59,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:11:59" (1/1) ... [2022-10-17 17:11:59,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:11:59" (1/1) ... [2022-10-17 17:11:59,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:11:59" (1/1) ... [2022-10-17 17:11:59,679 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:11:59" (1/1) ... [2022-10-17 17:11:59,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:11:59" (1/1) ... [2022-10-17 17:11:59,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:11:59,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:11:59,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:11:59,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:11:59,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:11:59" (1/1) ... [2022-10-17 17:11:59,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:11:59,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f104fe-5c35-4ade-a802-1af18a51b8f1/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:11:59,768 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f104fe-5c35-4ade-a802-1af18a51b8f1/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:11:59,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f104fe-5c35-4ade-a802-1af18a51b8f1/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:11:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:11:59,812 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-10-17 17:11:59,812 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-10-17 17:11:59,812 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-10-17 17:11:59,812 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-10-17 17:11:59,812 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-10-17 17:11:59,813 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-10-17 17:11:59,813 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-10-17 17:11:59,813 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-10-17 17:11:59,813 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-10-17 17:11:59,813 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-10-17 17:11:59,813 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-10-17 17:11:59,814 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-10-17 17:11:59,814 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-10-17 17:11:59,814 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-10-17 17:11:59,814 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-10-17 17:11:59,814 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-10-17 17:11:59,815 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-10-17 17:11:59,815 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-10-17 17:11:59,815 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-10-17 17:11:59,815 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-10-17 17:11:59,815 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-10-17 17:11:59,816 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-10-17 17:11:59,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:11:59,816 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-10-17 17:11:59,816 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-10-17 17:11:59,816 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-10-17 17:11:59,816 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-10-17 17:11:59,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:11:59,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:11:59,817 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-10-17 17:11:59,817 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-10-17 17:11:59,817 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-10-17 17:11:59,817 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-10-17 17:11:59,981 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:11:59,984 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:12:00,931 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:12:01,285 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:12:01,285 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-10-17 17:12:01,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:12:01 BoogieIcfgContainer [2022-10-17 17:12:01,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:12:01,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:12:01,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:12:01,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:12:01,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:11:59" (1/3) ... [2022-10-17 17:12:01,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c76928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:12:01, skipping insertion in model container [2022-10-17 17:12:01,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:11:59" (2/3) ... [2022-10-17 17:12:01,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c76928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:12:01, skipping insertion in model container [2022-10-17 17:12:01,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:12:01" (3/3) ... [2022-10-17 17:12:01,300 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.05.cil-2.c [2022-10-17 17:12:01,320 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:12:01,320 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-10-17 17:12:01,388 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:12:01,395 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;@43e196d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:12:01,395 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 17:12:01,412 INFO L276 IsEmpty]: Start isEmpty. Operand has 189 states, 136 states have (on average 1.5220588235294117) internal successors, (207), 144 states have internal predecessors, (207), 35 states have call successors, (35), 15 states have call predecessors, (35), 15 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2022-10-17 17:12:01,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-17 17:12:01,425 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:12:01,425 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] [2022-10-17 17:12:01,426 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:12:01,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:12:01,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1297203234, now seen corresponding path program 1 times [2022-10-17 17:12:01,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:12:01,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55986895] [2022-10-17 17:12:01,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:12:01,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:12:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:12:02,123 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 17:12:02,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:12:02,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55986895] [2022-10-17 17:12:02,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55986895] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:12:02,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:12:02,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 17:12:02,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557650562] [2022-10-17 17:12:02,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:12:02,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:12:02,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:12:02,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:12:02,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:12:02,176 INFO L87 Difference]: Start difference. First operand has 189 states, 136 states have (on average 1.5220588235294117) internal successors, (207), 144 states have internal predecessors, (207), 35 states have call successors, (35), 15 states have call predecessors, (35), 15 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-10-17 17:12:03,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:12:03,185 INFO L93 Difference]: Finished difference Result 434 states and 622 transitions. [2022-10-17 17:12:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 17:12:03,188 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2022-10-17 17:12:03,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:12:03,214 INFO L225 Difference]: With dead ends: 434 [2022-10-17 17:12:03,214 INFO L226 Difference]: Without dead ends: 248 [2022-10-17 17:12:03,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-10-17 17:12:03,234 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 408 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:12:03,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 850 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-17 17:12:03,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-10-17 17:12:03,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 235. [2022-10-17 17:12:03,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 170 states have (on average 1.423529411764706) internal successors, (242), 175 states have internal predecessors, (242), 43 states have call successors, (43), 22 states have call predecessors, (43), 20 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-10-17 17:12:03,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 324 transitions. [2022-10-17 17:12:03,358 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 324 transitions. Word has length 45 [2022-10-17 17:12:03,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:12:03,358 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 324 transitions. [2022-10-17 17:12:03,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-10-17 17:12:03,359 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 324 transitions. [2022-10-17 17:12:03,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-10-17 17:12:03,368 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:12:03,369 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] [2022-10-17 17:12:03,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:12:03,369 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:12:03,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:12:03,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1577705397, now seen corresponding path program 1 times [2022-10-17 17:12:03,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:12:03,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192195314] [2022-10-17 17:12:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:12:03,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:12:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:12:03,529 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 17:12:03,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:12:03,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192195314] [2022-10-17 17:12:03,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192195314] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:12:03,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:12:03,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:12:03,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102520691] [2022-10-17 17:12:03,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:12:03,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:12:03,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:12:03,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:12:03,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:12:03,537 INFO L87 Difference]: Start difference. First operand 235 states and 324 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:12:03,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:12:03,656 INFO L93 Difference]: Finished difference Result 460 states and 611 transitions. [2022-10-17 17:12:03,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:12:03,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-10-17 17:12:03,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:12:03,665 INFO L225 Difference]: With dead ends: 460 [2022-10-17 17:12:03,665 INFO L226 Difference]: Without dead ends: 344 [2022-10-17 17:12:03,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:12:03,668 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 235 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:12:03,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 287 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:12:03,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-10-17 17:12:03,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 330. [2022-10-17 17:12:03,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 235 states have (on average 1.3702127659574468) internal successors, (322), 240 states have internal predecessors, (322), 59 states have call successors, (59), 36 states have call predecessors, (59), 34 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-10-17 17:12:03,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 436 transitions. [2022-10-17 17:12:03,714 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 436 transitions. Word has length 46 [2022-10-17 17:12:03,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:12:03,714 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 436 transitions. [2022-10-17 17:12:03,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:12:03,715 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 436 transitions. [2022-10-17 17:12:03,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 17:12:03,717 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:12:03,717 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] [2022-10-17 17:12:03,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:12:03,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:12:03,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:12:03,718 INFO L85 PathProgramCache]: Analyzing trace with hash -776035917, now seen corresponding path program 1 times [2022-10-17 17:12:03,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:12:03,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309811316] [2022-10-17 17:12:03,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:12:03,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:12:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:12:03,820 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 17:12:03,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:12:03,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309811316] [2022-10-17 17:12:03,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309811316] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:12:03,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:12:03,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:12:03,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093012456] [2022-10-17 17:12:03,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:12:03,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:12:03,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:12:03,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:12:03,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:12:03,824 INFO L87 Difference]: Start difference. First operand 330 states and 436 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:12:03,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:12:03,978 INFO L93 Difference]: Finished difference Result 694 states and 884 transitions. [2022-10-17 17:12:03,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:12:03,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-10-17 17:12:03,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:12:03,984 INFO L225 Difference]: With dead ends: 694 [2022-10-17 17:12:03,985 INFO L226 Difference]: Without dead ends: 484 [2022-10-17 17:12:03,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:12:03,994 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 68 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:12:03,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 422 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:12:03,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-10-17 17:12:04,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 480. [2022-10-17 17:12:04,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 340 states have (on average 1.3441176470588236) internal successors, (457), 345 states have internal predecessors, (457), 83 states have call successors, (83), 57 states have call predecessors, (83), 55 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-10-17 17:12:04,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 619 transitions. [2022-10-17 17:12:04,081 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 619 transitions. Word has length 47 [2022-10-17 17:12:04,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:12:04,083 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 619 transitions. [2022-10-17 17:12:04,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:12:04,083 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 619 transitions. [2022-10-17 17:12:04,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 17:12:04,086 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:12:04,086 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] [2022-10-17 17:12:04,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:12:04,087 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:12:04,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:12:04,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1315996642, now seen corresponding path program 1 times [2022-10-17 17:12:04,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:12:04,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350839551] [2022-10-17 17:12:04,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:12:04,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:12:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:12:04,254 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 17:12:04,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:12:04,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350839551] [2022-10-17 17:12:04,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350839551] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:12:04,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:12:04,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:12:04,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856169403] [2022-10-17 17:12:04,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:12:04,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:12:04,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:12:04,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:12:04,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:12:04,258 INFO L87 Difference]: Start difference. First operand 480 states and 619 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:12:04,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:12:04,928 INFO L93 Difference]: Finished difference Result 983 states and 1415 transitions. [2022-10-17 17:12:04,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:12:04,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2022-10-17 17:12:04,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:12:04,937 INFO L225 Difference]: With dead ends: 983 [2022-10-17 17:12:04,937 INFO L226 Difference]: Without dead ends: 874 [2022-10-17 17:12:04,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:12:04,940 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 807 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:12:04,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [817 Valid, 864 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:12:04,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-10-17 17:12:05,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 861. [2022-10-17 17:12:05,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 640 states have (on average 1.4015625) internal successors, (897), 648 states have internal predecessors, (897), 140 states have call successors, (140), 81 states have call predecessors, (140), 79 states have return successors, (170), 133 states have call predecessors, (170), 136 states have call successors, (170) [2022-10-17 17:12:05,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1207 transitions. [2022-10-17 17:12:05,045 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1207 transitions. Word has length 47 [2022-10-17 17:12:05,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:12:05,046 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 1207 transitions. [2022-10-17 17:12:05,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:12:05,046 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1207 transitions. [2022-10-17 17:12:05,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-10-17 17:12:05,048 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:12:05,048 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, 1] [2022-10-17 17:12:05,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:12:05,048 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:12:05,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:12:05,049 INFO L85 PathProgramCache]: Analyzing trace with hash 615328978, now seen corresponding path program 1 times [2022-10-17 17:12:05,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:12:05,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65340997] [2022-10-17 17:12:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:12:05,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:12:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:12:05,098 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 17:12:05,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:12:05,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65340997] [2022-10-17 17:12:05,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65340997] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:12:05,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:12:05,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:12:05,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268181055] [2022-10-17 17:12:05,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:12:05,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:12:05,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:12:05,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:12:05,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:12:05,102 INFO L87 Difference]: Start difference. First operand 861 states and 1207 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:12:05,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:12:05,262 INFO L93 Difference]: Finished difference Result 1285 states and 1729 transitions. [2022-10-17 17:12:05,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:12:05,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-10-17 17:12:05,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:12:05,270 INFO L225 Difference]: With dead ends: 1285 [2022-10-17 17:12:05,271 INFO L226 Difference]: Without dead ends: 924 [2022-10-17 17:12:05,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:12:05,274 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 235 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:12:05,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 294 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:12:05,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-10-17 17:12:05,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 912. [2022-10-17 17:12:05,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 676 states have (on average 1.3890532544378698) internal successors, (939), 684 states have internal predecessors, (939), 148 states have call successors, (148), 88 states have call predecessors, (148), 86 states have return successors, (178), 141 states have call predecessors, (178), 144 states have call successors, (178) [2022-10-17 17:12:05,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1265 transitions. [2022-10-17 17:12:05,397 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1265 transitions. Word has length 53 [2022-10-17 17:12:05,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:12:05,397 INFO L495 AbstractCegarLoop]: Abstraction has 912 states and 1265 transitions. [2022-10-17 17:12:05,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:12:05,398 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1265 transitions. [2022-10-17 17:12:05,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-10-17 17:12:05,400 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:12:05,400 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:12:05,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:12:05,400 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:12:05,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:12:05,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1378885210, now seen corresponding path program 1 times [2022-10-17 17:12:05,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:12:05,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851364007] [2022-10-17 17:12:05,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:12:05,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:12:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:12:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:12:05,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:12:05,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851364007] [2022-10-17 17:12:05,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851364007] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:12:05,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:12:05,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:12:05,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63155781] [2022-10-17 17:12:05,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:12:05,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:12:05,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:12:05,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:12:05,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:12:05,495 INFO L87 Difference]: Start difference. First operand 912 states and 1265 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-10-17 17:12:05,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:12:05,773 INFO L93 Difference]: Finished difference Result 1021 states and 1397 transitions. [2022-10-17 17:12:05,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:12:05,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-10-17 17:12:05,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:12:05,781 INFO L225 Difference]: With dead ends: 1021 [2022-10-17 17:12:05,782 INFO L226 Difference]: Without dead ends: 1018 [2022-10-17 17:12:05,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:12:05,784 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 424 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:12:05,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 273 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:12:05,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-10-17 17:12:05,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 911. [2022-10-17 17:12:05,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 676 states have (on average 1.3846153846153846) internal successors, (936), 683 states have internal predecessors, (936), 147 states have call successors, (147), 88 states have call predecessors, (147), 86 states have return successors, (178), 141 states have call predecessors, (178), 144 states have call successors, (178) [2022-10-17 17:12:05,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1261 transitions. [2022-10-17 17:12:05,899 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1261 transitions. Word has length 54 [2022-10-17 17:12:05,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:12:05,900 INFO L495 AbstractCegarLoop]: Abstraction has 911 states and 1261 transitions. [2022-10-17 17:12:05,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-10-17 17:12:05,900 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1261 transitions. [2022-10-17 17:12:05,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-10-17 17:12:05,902 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:12:05,902 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:12:05,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:12:05,902 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:12:05,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:12:05,903 INFO L85 PathProgramCache]: Analyzing trace with hash -205179364, now seen corresponding path program 1 times [2022-10-17 17:12:05,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:12:05,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503703757] [2022-10-17 17:12:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:12:05,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:12:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:12:06,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:12:06,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:12:06,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503703757] [2022-10-17 17:12:06,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503703757] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:12:06,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495222951] [2022-10-17 17:12:06,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:12:06,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:12:06,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f104fe-5c35-4ade-a802-1af18a51b8f1/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:12:06,047 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f104fe-5c35-4ade-a802-1af18a51b8f1/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:12:06,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f104fe-5c35-4ade-a802-1af18a51b8f1/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:12:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:12:06,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 17:12:06,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:12:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:12:06,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:12:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:12:06,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495222951] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:12:06,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [794217369] [2022-10-17 17:12:06,871 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-10-17 17:12:06,871 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:12:06,877 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:12:06,882 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:12:06,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:12:12,822 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 135 for LOIs [2022-10-17 17:12:12,848 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 103 for LOIs [2022-10-17 17:12:12,859 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 131 for LOIs [2022-10-17 17:12:12,882 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 139 for LOIs [2022-10-17 17:12:13,378 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 135 for LOIs [2022-10-17 17:12:13,424 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 135 for LOIs [2022-10-17 17:12:13,493 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 135 for LOIs [2022-10-17 17:12:13,519 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 142 for LOIs [2022-10-17 17:12:13,543 INFO L180 IcfgInterpreter]: Interpretation finished