./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS --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 d9ed75528b8d19bd57b9807f295b98ef03135122ab1c9d2a59ccb3a2a66766e0 --- 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-8393723 [2022-11-19 07:48:12,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:48:12,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:48:12,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:48:12,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:48:12,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:48:12,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:48:12,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:48:12,459 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:48:12,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:48:12,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:48:12,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:48:12,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:48:12,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:48:12,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:48:12,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:48:12,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:48:12,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:48:12,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:48:12,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:48:12,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:48:12,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:48:12,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:48:12,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:48:12,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:48:12,481 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:48:12,481 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:48:12,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:48:12,483 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:48:12,484 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:48:12,484 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:48:12,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:48:12,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:48:12,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:48:12,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:48:12,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:48:12,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:48:12,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:48:12,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:48:12,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:48:12,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:48:12,495 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:48:12,524 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:48:12,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:48:12,525 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:48:12,525 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:48:12,525 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:48:12,526 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:48:12,526 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:48:12,526 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:48:12,526 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:48:12,526 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:48:12,527 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:48:12,533 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:48:12,533 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:48:12,534 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:48:12,534 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:48:12,534 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:48:12,534 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:48:12,534 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:48:12,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:48:12,535 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:48:12,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:48:12,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:48:12,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:48:12,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:48:12,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:48:12,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:48:12,539 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:48:12,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:48:12,540 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:48:12,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:48:12,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:48:12,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:48:12,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:48:12,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:48:12,547 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:48:12,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:48:12,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:48:12,548 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:48:12,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:48:12,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:48:12,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:48:12,549 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_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9ed75528b8d19bd57b9807f295b98ef03135122ab1c9d2a59ccb3a2a66766e0 [2022-11-19 07:48:12,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:48:12,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:48:12,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:48:12,887 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:48:12,888 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:48:12,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-2.c [2022-11-19 07:48:12,977 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/data/6791b1ace/7f46f3f561e74efd8605f135bbdac027/FLAG4717a1ef3 [2022-11-19 07:48:14,056 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:48:14,058 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-2.c [2022-11-19 07:48:14,123 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/data/6791b1ace/7f46f3f561e74efd8605f135bbdac027/FLAG4717a1ef3 [2022-11-19 07:48:14,351 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/data/6791b1ace/7f46f3f561e74efd8605f135bbdac027 [2022-11-19 07:48:14,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:48:14,358 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:48:14,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:48:14,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:48:14,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:48:14,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:48:14" (1/1) ... [2022-11-19 07:48:14,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b4e4c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:14, skipping insertion in model container [2022-11-19 07:48:14,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:48:14" (1/1) ... [2022-11-19 07:48:14,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:48:14,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:48:17,060 WARN L234 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_ed55dfd9-afdb-4390-83f4-992807ef5e01/sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-2.c[380323,380336] [2022-11-19 07:48:17,095 WARN L234 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_ed55dfd9-afdb-4390-83f4-992807ef5e01/sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-2.c[383339,383352] [2022-11-19 07:48:17,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:48:17,519 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:48:18,767 WARN L234 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_ed55dfd9-afdb-4390-83f4-992807ef5e01/sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-2.c[380323,380336] [2022-11-19 07:48:18,774 WARN L234 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_ed55dfd9-afdb-4390-83f4-992807ef5e01/sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-2.c[383339,383352] [2022-11-19 07:48:18,807 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:48:18,871 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:48:18,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:18 WrapperNode [2022-11-19 07:48:18,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:48:18,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:48:18,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:48:18,873 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:48:18,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:18" (1/1) ... [2022-11-19 07:48:18,951 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:18" (1/1) ... [2022-11-19 07:48:19,429 INFO L138 Inliner]: procedures = 64, calls = 71, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 13083 [2022-11-19 07:48:19,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:48:19,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:48:19,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:48:19,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:48:19,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:18" (1/1) ... [2022-11-19 07:48:19,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:18" (1/1) ... [2022-11-19 07:48:19,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:18" (1/1) ... [2022-11-19 07:48:19,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:18" (1/1) ... [2022-11-19 07:48:19,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:18" (1/1) ... [2022-11-19 07:48:19,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:18" (1/1) ... [2022-11-19 07:48:19,868 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:18" (1/1) ... [2022-11-19 07:48:19,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:18" (1/1) ... [2022-11-19 07:48:19,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:48:19,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:48:19,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:48:19,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:48:19,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:18" (1/1) ... [2022-11-19 07:48:19,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:48:19,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:20,001 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:48:20,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:48:20,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:48:20,044 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-19 07:48:20,044 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-19 07:48:20,044 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 07:48:20,044 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 07:48:20,045 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-19 07:48:20,045 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-19 07:48:20,045 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-19 07:48:20,045 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-19 07:48:20,045 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-19 07:48:20,045 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-19 07:48:20,045 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-19 07:48:20,046 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-19 07:48:20,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:48:20,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:48:20,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:48:20,221 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:48:20,223 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:48:29,432 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:48:32,017 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:48:32,017 INFO L300 CfgBuilder]: Removed 14 assume(true) statements. [2022-11-19 07:48:32,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:48:32 BoogieIcfgContainer [2022-11-19 07:48:32,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:48:32,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:48:32,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:48:32,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:48:32,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:48:14" (1/3) ... [2022-11-19 07:48:32,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5357922c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:48:32, skipping insertion in model container [2022-11-19 07:48:32,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:18" (2/3) ... [2022-11-19 07:48:32,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5357922c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:48:32, skipping insertion in model container [2022-11-19 07:48:32,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:48:32" (3/3) ... [2022-11-19 07:48:32,032 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.10.cil-2.c [2022-11-19 07:48:32,051 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:48:32,051 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 07:48:32,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:48:32,145 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;@770676f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:48:32,146 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 07:48:32,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-19 07:48:32,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 07:48:32,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:32,173 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:32,174 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:32,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:32,182 INFO L85 PathProgramCache]: Analyzing trace with hash -916646565, now seen corresponding path program 1 times [2022-11-19 07:48:32,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:32,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47013703] [2022-11-19 07:48:32,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:32,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:48:32,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:32,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47013703] [2022-11-19 07:48:32,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47013703] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:32,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:32,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:48:32,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807314990] [2022-11-19 07:48:32,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:32,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:48:32,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:32,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:48:32,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:48:32,826 INFO L87 Difference]: Start difference. First operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2022-11-19 07:48:34,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:34,103 INFO L93 Difference]: Finished difference Result 3767 states and 7315 transitions. [2022-11-19 07:48:34,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:48:34,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 61 [2022-11-19 07:48:34,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:34,142 INFO L225 Difference]: With dead ends: 3767 [2022-11-19 07:48:34,143 INFO L226 Difference]: Without dead ends: 1957 [2022-11-19 07:48:34,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:48:34,157 INFO L413 NwaCegarLoop]: 3451 mSDtfsCounter, 3713 mSDsluCounter, 3361 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3713 SdHoareTripleChecker+Valid, 6812 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:34,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3713 Valid, 6812 Invalid, 708 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 07:48:34,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2022-11-19 07:48:34,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1956. [2022-11-19 07:48:34,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1898 states have (on average 1.9262381454162276) internal successors, (3656), 1901 states have internal predecessors, (3656), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-19 07:48:34,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 3744 transitions. [2022-11-19 07:48:34,355 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 3744 transitions. Word has length 61 [2022-11-19 07:48:34,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:34,356 INFO L495 AbstractCegarLoop]: Abstraction has 1956 states and 3744 transitions. [2022-11-19 07:48:34,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2022-11-19 07:48:34,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 3744 transitions. [2022-11-19 07:48:34,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-19 07:48:34,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:34,371 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, 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, 1, 1, 1] [2022-11-19 07:48:34,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:48:34,372 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:34,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:34,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1210894831, now seen corresponding path program 1 times [2022-11-19 07:48:34,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:34,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669240687] [2022-11-19 07:48:34,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:34,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:48:34,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:34,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669240687] [2022-11-19 07:48:34,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669240687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:48:34,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648959238] [2022-11-19 07:48:34,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:34,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:34,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:34,695 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:34,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:48:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:34,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:48:34,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:48:35,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:48:35,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648959238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:35,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:48:35,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:48:35,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079649575] [2022-11-19 07:48:35,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:35,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:48:35,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:35,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:48:35,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:48:35,101 INFO L87 Difference]: Start difference. First operand 1956 states and 3744 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:48:35,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:35,662 INFO L93 Difference]: Finished difference Result 2569 states and 4695 transitions. [2022-11-19 07:48:35,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:48:35,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-11-19 07:48:35,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:35,674 INFO L225 Difference]: With dead ends: 2569 [2022-11-19 07:48:35,674 INFO L226 Difference]: Without dead ends: 2259 [2022-11-19 07:48:35,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:48:35,678 INFO L413 NwaCegarLoop]: 3309 mSDtfsCounter, 3471 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:35,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3471 Valid, 3504 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:48:35,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2022-11-19 07:48:35,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2255. [2022-11-19 07:48:35,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2147 states have (on average 1.8765719608756404) internal successors, (4029), 2151 states have internal predecessors, (4029), 82 states have call successors, (82), 24 states have call predecessors, (82), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2022-11-19 07:48:35,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 4193 transitions. [2022-11-19 07:48:35,756 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 4193 transitions. Word has length 122 [2022-11-19 07:48:35,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:35,757 INFO L495 AbstractCegarLoop]: Abstraction has 2255 states and 4193 transitions. [2022-11-19 07:48:35,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:48:35,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 4193 transitions. [2022-11-19 07:48:35,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-19 07:48:35,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:35,760 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, 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, 1, 1, 1] [2022-11-19 07:48:35,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:35,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:35,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:35,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:35,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1052608625, now seen corresponding path program 1 times [2022-11-19 07:48:35,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:35,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054533696] [2022-11-19 07:48:35,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:35,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:48:36,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:36,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054533696] [2022-11-19 07:48:36,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054533696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:48:36,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268488712] [2022-11-19 07:48:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:36,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:36,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:36,350 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:36,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:48:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:36,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:48:36,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 07:48:36,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:48:36,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268488712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:36,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:48:36,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:48:36,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108754853] [2022-11-19 07:48:36,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:36,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:48:36,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:36,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:48:36,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:48:36,700 INFO L87 Difference]: Start difference. First operand 2255 states and 4193 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:48:37,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:37,278 INFO L93 Difference]: Finished difference Result 3460 states and 6056 transitions. [2022-11-19 07:48:37,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:48:37,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-11-19 07:48:37,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:37,294 INFO L225 Difference]: With dead ends: 3460 [2022-11-19 07:48:37,294 INFO L226 Difference]: Without dead ends: 2851 [2022-11-19 07:48:37,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:48:37,299 INFO L413 NwaCegarLoop]: 3308 mSDtfsCounter, 3483 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3483 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:37,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3483 Valid, 3503 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:48:37,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2022-11-19 07:48:37,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2845. [2022-11-19 07:48:37,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2639 states have (on average 1.8048503220917014) internal successors, (4763), 2645 states have internal predecessors, (4763), 156 states have call successors, (156), 48 states have call predecessors, (156), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2022-11-19 07:48:37,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 5075 transitions. [2022-11-19 07:48:37,460 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 5075 transitions. Word has length 122 [2022-11-19 07:48:37,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:37,460 INFO L495 AbstractCegarLoop]: Abstraction has 2845 states and 5075 transitions. [2022-11-19 07:48:37,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:48:37,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 5075 transitions. [2022-11-19 07:48:37,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-19 07:48:37,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:37,466 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, 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, 1, 1, 1] [2022-11-19 07:48:37,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 07:48:37,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:37,673 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:37,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:37,674 INFO L85 PathProgramCache]: Analyzing trace with hash 534727377, now seen corresponding path program 1 times [2022-11-19 07:48:37,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:37,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341625350] [2022-11-19 07:48:37,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:37,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:37,904 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:48:37,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:37,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341625350] [2022-11-19 07:48:37,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341625350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:48:37,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273693263] [2022-11-19 07:48:37,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:37,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:37,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:37,912 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:37,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:48:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:38,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:48:38,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:48:38,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:48:38,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273693263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:38,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:48:38,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:48:38,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858820736] [2022-11-19 07:48:38,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:38,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:48:38,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:38,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:48:38,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:48:38,210 INFO L87 Difference]: Start difference. First operand 2845 states and 5075 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:48:38,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:38,835 INFO L93 Difference]: Finished difference Result 5218 states and 8728 transitions. [2022-11-19 07:48:38,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:48:38,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-11-19 07:48:38,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:38,859 INFO L225 Difference]: With dead ends: 5218 [2022-11-19 07:48:38,860 INFO L226 Difference]: Without dead ends: 4019 [2022-11-19 07:48:38,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:48:38,872 INFO L413 NwaCegarLoop]: 3296 mSDtfsCounter, 3489 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 3491 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:38,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3489 Valid, 3491 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:48:38,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4019 states. [2022-11-19 07:48:39,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4019 to 4009. [2022-11-19 07:48:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4009 states, 3611 states have (on average 1.7189144281362503) internal successors, (6207), 3621 states have internal predecessors, (6207), 300 states have call successors, (300), 96 states have call predecessors, (300), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2022-11-19 07:48:39,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4009 states to 4009 states and 6807 transitions. [2022-11-19 07:48:39,107 INFO L78 Accepts]: Start accepts. Automaton has 4009 states and 6807 transitions. Word has length 122 [2022-11-19 07:48:39,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:39,108 INFO L495 AbstractCegarLoop]: Abstraction has 4009 states and 6807 transitions. [2022-11-19 07:48:39,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:48:39,109 INFO L276 IsEmpty]: Start isEmpty. Operand 4009 states and 6807 transitions. [2022-11-19 07:48:39,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-19 07:48:39,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:39,117 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, 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, 1, 1, 1] [2022-11-19 07:48:39,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:39,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-19 07:48:39,329 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:39,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:39,330 INFO L85 PathProgramCache]: Analyzing trace with hash 863880497, now seen corresponding path program 1 times [2022-11-19 07:48:39,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:39,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63739971] [2022-11-19 07:48:39,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:39,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:48:39,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:39,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63739971] [2022-11-19 07:48:39,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63739971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:48:39,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983716450] [2022-11-19 07:48:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:39,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:39,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:39,527 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:39,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:48:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:39,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:48:39,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:39,815 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:48:39,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:48:39,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983716450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:39,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:48:39,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:48:39,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454163208] [2022-11-19 07:48:39,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:39,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:48:39,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:39,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:48:39,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:48:39,818 INFO L87 Difference]: Start difference. First operand 4009 states and 6807 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:48:40,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:40,679 INFO L93 Difference]: Finished difference Result 8686 states and 13972 transitions. [2022-11-19 07:48:40,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:48:40,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-11-19 07:48:40,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:40,707 INFO L225 Difference]: With dead ends: 8686 [2022-11-19 07:48:40,707 INFO L226 Difference]: Without dead ends: 6323 [2022-11-19 07:48:40,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:48:40,717 INFO L413 NwaCegarLoop]: 3306 mSDtfsCounter, 3492 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3492 SdHoareTripleChecker+Valid, 3501 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:40,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3492 Valid, 3501 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:48:40,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6323 states. [2022-11-19 07:48:40,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6323 to 6305. [2022-11-19 07:48:40,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6305 states, 5531 states have (on average 1.6356897486892064) internal successors, (9047), 5549 states have internal predecessors, (9047), 580 states have call successors, (580), 192 states have call predecessors, (580), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2022-11-19 07:48:40,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6305 states to 6305 states and 10207 transitions. [2022-11-19 07:48:40,979 INFO L78 Accepts]: Start accepts. Automaton has 6305 states and 10207 transitions. Word has length 122 [2022-11-19 07:48:40,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:40,979 INFO L495 AbstractCegarLoop]: Abstraction has 6305 states and 10207 transitions. [2022-11-19 07:48:40,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:48:40,980 INFO L276 IsEmpty]: Start isEmpty. Operand 6305 states and 10207 transitions. [2022-11-19 07:48:40,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-19 07:48:40,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:40,989 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, 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, 1, 1, 1] [2022-11-19 07:48:40,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:41,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:41,196 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:41,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:41,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1254141649, now seen corresponding path program 1 times [2022-11-19 07:48:41,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:41,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440619943] [2022-11-19 07:48:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:41,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:48:41,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:41,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440619943] [2022-11-19 07:48:41,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440619943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:48:41,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044296066] [2022-11-19 07:48:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:41,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:41,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:41,394 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:41,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:48:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:41,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:48:41,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:41,696 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:48:41,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:48:41,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044296066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:41,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:48:41,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:48:41,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043130618] [2022-11-19 07:48:41,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:41,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:48:41,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:41,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:48:41,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:48:41,700 INFO L87 Difference]: Start difference. First operand 6305 states and 10207 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:48:42,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:42,488 INFO L93 Difference]: Finished difference Result 15526 states and 24260 transitions. [2022-11-19 07:48:42,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:48:42,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-11-19 07:48:42,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:42,549 INFO L225 Difference]: With dead ends: 15526 [2022-11-19 07:48:42,549 INFO L226 Difference]: Without dead ends: 10867 [2022-11-19 07:48:42,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:48:42,573 INFO L413 NwaCegarLoop]: 3278 mSDtfsCounter, 3477 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3477 SdHoareTripleChecker+Valid, 3473 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:42,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3477 Valid, 3473 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:48:42,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10867 states. [2022-11-19 07:48:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10867 to 10833. [2022-11-19 07:48:43,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10833 states, 9323 states have (on average 1.569344631556366) internal successors, (14631), 9357 states have internal predecessors, (14631), 1124 states have call successors, (1124), 384 states have call predecessors, (1124), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2022-11-19 07:48:43,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10833 states to 10833 states and 16879 transitions. [2022-11-19 07:48:43,185 INFO L78 Accepts]: Start accepts. Automaton has 10833 states and 16879 transitions. Word has length 122 [2022-11-19 07:48:43,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:43,187 INFO L495 AbstractCegarLoop]: Abstraction has 10833 states and 16879 transitions. [2022-11-19 07:48:43,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:48:43,188 INFO L276 IsEmpty]: Start isEmpty. Operand 10833 states and 16879 transitions. [2022-11-19 07:48:43,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-19 07:48:43,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:43,208 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, 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, 1, 1, 1] [2022-11-19 07:48:43,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:43,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed55dfd9-afdb-4390-83f4-992807ef5e01/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 07:48:43,415 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:43,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:43,416 INFO L85 PathProgramCache]: Analyzing trace with hash 259766577, now seen corresponding path program 1 times [2022-11-19 07:48:43,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:43,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255735595] [2022-11-19 07:48:43,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:43,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 07:48:44,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:44,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255735595] [2022-11-19 07:48:44,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255735595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:44,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:44,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:48:44,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444655216] [2022-11-19 07:48:44,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:44,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:48:44,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:44,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:48:44,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:48:44,035 INFO L87 Difference]: Start difference. First operand 10833 states and 16879 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:48:45,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:45,818 INFO L93 Difference]: Finished difference Result 26597 states and 40353 transitions. [2022-11-19 07:48:45,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:48:45,819 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 122 [2022-11-19 07:48:45,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:45,896 INFO L225 Difference]: With dead ends: 26597 [2022-11-19 07:48:45,896 INFO L226 Difference]: Without dead ends: 17411 [2022-11-19 07:48:45,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:48:45,927 INFO L413 NwaCegarLoop]: 3300 mSDtfsCounter, 4033 mSDsluCounter, 9794 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4039 SdHoareTripleChecker+Valid, 13094 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:45,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4039 Valid, 13094 Invalid, 1340 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [127 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 07:48:45,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17411 states. [2022-11-19 07:48:46,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17411 to 15297. [2022-11-19 07:48:46,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15297 states, 13051 states have (on average 1.5391157765688452) internal successors, (20087), 13101 states have internal predecessors, (20087), 1668 states have call successors, (1668), 576 states have call predecessors, (1668), 576 states have return successors, (1668), 1620 states have call predecessors, (1668), 1668 states have call successors, (1668) [2022-11-19 07:48:46,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15297 states to 15297 states and 23423 transitions. [2022-11-19 07:48:46,861 INFO L78 Accepts]: Start accepts. Automaton has 15297 states and 23423 transitions. Word has length 122 [2022-11-19 07:48:46,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:46,863 INFO L495 AbstractCegarLoop]: Abstraction has 15297 states and 23423 transitions. [2022-11-19 07:48:46,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:48:46,863 INFO L276 IsEmpty]: Start isEmpty. Operand 15297 states and 23423 transitions. [2022-11-19 07:48:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-19 07:48:46,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:46,886 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, 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, 1, 1, 1, 1] [2022-11-19 07:48:46,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:48:46,887 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:46,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:46,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1088943198, now seen corresponding path program 1 times [2022-11-19 07:48:46,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:46,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558299645] [2022-11-19 07:48:46,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:46,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 07:48:47,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:47,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558299645] [2022-11-19 07:48:47,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558299645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:47,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:47,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:48:47,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801565060] [2022-11-19 07:48:47,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:47,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:48:47,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:47,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:48:47,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:48:47,546 INFO L87 Difference]: Start difference. First operand 15297 states and 23423 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:48:50,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:50,411 INFO L93 Difference]: Finished difference Result 36973 states and 55793 transitions. [2022-11-19 07:48:50,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:48:50,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2022-11-19 07:48:50,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:50,540 INFO L225 Difference]: With dead ends: 36973 [2022-11-19 07:48:50,540 INFO L226 Difference]: Without dead ends: 23323 [2022-11-19 07:48:50,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:48:50,775 INFO L413 NwaCegarLoop]: 3272 mSDtfsCounter, 3979 mSDsluCounter, 9680 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3985 SdHoareTripleChecker+Valid, 12952 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:50,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3985 Valid, 12952 Invalid, 1322 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [139 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 07:48:50,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23323 states. [2022-11-19 07:48:52,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23323 to 21929. [2022-11-19 07:48:52,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21929 states, 18587 states have (on average 1.5149835906816593) internal successors, (28159), 18661 states have internal predecessors, (28159), 2476 states have call successors, (2476), 864 states have call predecessors, (2476), 864 states have return successors, (2476), 2404 states have call predecessors, (2476), 2476 states have call successors, (2476) [2022-11-19 07:48:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21929 states to 21929 states and 33111 transitions. [2022-11-19 07:48:52,172 INFO L78 Accepts]: Start accepts. Automaton has 21929 states and 33111 transitions. Word has length 123 [2022-11-19 07:48:52,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:52,173 INFO L495 AbstractCegarLoop]: Abstraction has 21929 states and 33111 transitions. [2022-11-19 07:48:52,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:48:52,174 INFO L276 IsEmpty]: Start isEmpty. Operand 21929 states and 33111 transitions. [2022-11-19 07:48:52,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 07:48:52,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:52,207 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, 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, 1, 1, 1, 1, 1] [2022-11-19 07:48:52,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:48:52,207 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:52,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:52,208 INFO L85 PathProgramCache]: Analyzing trace with hash 136455893, now seen corresponding path program 1 times [2022-11-19 07:48:52,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:52,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517256390] [2022-11-19 07:48:52,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:52,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 07:48:52,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:52,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517256390] [2022-11-19 07:48:52,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517256390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:52,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:52,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:48:52,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562008932] [2022-11-19 07:48:52,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:52,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:48:52,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:52,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:48:52,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:48:52,752 INFO L87 Difference]: Start difference. First operand 21929 states and 33111 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:48:56,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:56,778 INFO L93 Difference]: Finished difference Result 72237 states and 107490 transitions. [2022-11-19 07:48:56,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:48:56,779 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2022-11-19 07:48:56,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:57,010 INFO L225 Difference]: With dead ends: 72237 [2022-11-19 07:48:57,010 INFO L226 Difference]: Without dead ends: 51955 [2022-11-19 07:48:57,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:48:57,064 INFO L413 NwaCegarLoop]: 3282 mSDtfsCounter, 4221 mSDsluCounter, 6504 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4240 SdHoareTripleChecker+Valid, 9786 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:57,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4240 Valid, 9786 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:48:57,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51955 states. [2022-11-19 07:48:59,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51955 to 41345. [2022-11-19 07:48:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41345 states, 34811 states have (on average 1.4866277900663583) internal successors, (51751), 34957 states have internal predecessors, (51751), 4804 states have call successors, (4804), 1728 states have call predecessors, (4804), 1728 states have return successors, (4804), 4660 states have call predecessors, (4804), 4804 states have call successors, (4804) [2022-11-19 07:48:59,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41345 states to 41345 states and 61359 transitions. [2022-11-19 07:48:59,994 INFO L78 Accepts]: Start accepts. Automaton has 41345 states and 61359 transitions. Word has length 124 [2022-11-19 07:48:59,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:59,995 INFO L495 AbstractCegarLoop]: Abstraction has 41345 states and 61359 transitions. [2022-11-19 07:48:59,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:48:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 41345 states and 61359 transitions. [2022-11-19 07:49:00,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 07:49:00,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:00,073 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, 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, 1, 1, 1, 1, 1, 1] [2022-11-19 07:49:00,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:49:00,073 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:49:00,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:00,074 INFO L85 PathProgramCache]: Analyzing trace with hash -355811258, now seen corresponding path program 1 times [2022-11-19 07:49:00,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:49:00,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172083062] [2022-11-19 07:49:00,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:00,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:49:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:00,725 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 07:49:00,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:00,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172083062] [2022-11-19 07:49:00,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172083062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:49:00,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:49:00,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:49:00,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073815146] [2022-11-19 07:49:00,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:49:00,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:49:00,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:49:00,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:49:00,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:49:00,729 INFO L87 Difference]: Start difference. First operand 41345 states and 61359 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:49:06,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:49:06,748 INFO L93 Difference]: Finished difference Result 108861 states and 161033 transitions. [2022-11-19 07:49:06,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:49:06,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2022-11-19 07:49:06,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:49:07,039 INFO L225 Difference]: With dead ends: 108861 [2022-11-19 07:49:07,039 INFO L226 Difference]: Without dead ends: 69163 [2022-11-19 07:49:07,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:49:07,165 INFO L413 NwaCegarLoop]: 3272 mSDtfsCounter, 4042 mSDsluCounter, 9740 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4048 SdHoareTripleChecker+Valid, 13012 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:49:07,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4048 Valid, 13012 Invalid, 1334 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [139 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 07:49:07,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69163 states. [2022-11-19 07:49:11,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69163 to 60617. [2022-11-19 07:49:11,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60617 states, 50891 states have (on average 1.4734039417578746) internal successors, (74983), 51109 states have internal predecessors, (74983), 7132 states have call successors, (7132), 2592 states have call predecessors, (7132), 2592 states have return successors, (7132), 6916 states have call predecessors, (7132), 7132 states have call successors, (7132) [2022-11-19 07:49:12,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60617 states to 60617 states and 89247 transitions. [2022-11-19 07:49:12,130 INFO L78 Accepts]: Start accepts. Automaton has 60617 states and 89247 transitions. Word has length 125 [2022-11-19 07:49:12,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:49:12,133 INFO L495 AbstractCegarLoop]: Abstraction has 60617 states and 89247 transitions. [2022-11-19 07:49:12,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:49:12,134 INFO L276 IsEmpty]: Start isEmpty. Operand 60617 states and 89247 transitions. [2022-11-19 07:49:12,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-19 07:49:12,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:12,256 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, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:49:12,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:49:12,256 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:49:12,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:12,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1928275731, now seen corresponding path program 1 times [2022-11-19 07:49:12,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:49:12,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747499166] [2022-11-19 07:49:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:12,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:49:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 07:49:12,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:12,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747499166] [2022-11-19 07:49:12,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747499166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:49:12,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:49:12,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:49:12,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449376414] [2022-11-19 07:49:12,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:49:12,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:49:12,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:49:12,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:49:12,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:49:12,877 INFO L87 Difference]: Start difference. First operand 60617 states and 89247 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)