./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fde4aa10540dafc8826e147080809d5acc35a439830c8d5d4d25a271d8a78822 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:41:38,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:41:38,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:41:38,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:41:38,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:41:38,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:41:38,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:41:38,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:41:38,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:41:38,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:41:38,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:41:38,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:41:38,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:41:38,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:41:38,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:41:38,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:41:38,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:41:38,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:41:38,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:41:38,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:41:38,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:41:38,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:41:38,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:41:38,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:41:38,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:41:38,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:41:38,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:41:38,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:41:38,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:41:38,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:41:38,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:41:38,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:41:38,237 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:41:38,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:41:38,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:41:38,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:41:38,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:41:38,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:41:38,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:41:38,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:41:38,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:41:38,252 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:41:38,299 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:41:38,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:41:38,305 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:41:38,305 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:41:38,306 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:41:38,307 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:41:38,307 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:41:38,307 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:41:38,307 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:41:38,308 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:41:38,309 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:41:38,309 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:41:38,309 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:41:38,309 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:41:38,310 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:41:38,310 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:41:38,310 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:41:38,310 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:41:38,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:41:38,311 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:41:38,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:41:38,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:41:38,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:41:38,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:41:38,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:41:38,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:41:38,313 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:41:38,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:41:38,313 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:41:38,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:41:38,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:41:38,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:41:38,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:41:38,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:41:38,315 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:41:38,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:41:38,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:41:38,316 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:41:38,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:41:38,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:41:38,316 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:41:38,317 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_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fde4aa10540dafc8826e147080809d5acc35a439830c8d5d4d25a271d8a78822 [2022-10-17 17:41:38,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:41:38,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:41:38,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:41:38,649 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:41:38,649 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:41:38,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-2.c [2022-10-17 17:41:38,727 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/data/785e4ab1b/8958c82e11134fe3ade1f62fbbad7743/FLAG8f616743f [2022-10-17 17:41:39,777 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:41:39,778 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-2.c [2022-10-17 17:41:39,840 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/data/785e4ab1b/8958c82e11134fe3ade1f62fbbad7743/FLAG8f616743f [2022-10-17 17:41:40,037 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/data/785e4ab1b/8958c82e11134fe3ade1f62fbbad7743 [2022-10-17 17:41:40,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:41:40,045 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:41:40,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:41:40,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:41:40,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:41:40,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:41:40" (1/1) ... [2022-10-17 17:41:40,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f492345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:40, skipping insertion in model container [2022-10-17 17:41:40,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:41:40" (1/1) ... [2022-10-17 17:41:40,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:41:40,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:41:42,710 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-2.c[382357,382370] [2022-10-17 17:41:42,737 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-2.c[383339,383352] [2022-10-17 17:41:43,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:41:43,042 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:41:44,366 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-2.c[382357,382370] [2022-10-17 17:41:44,372 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-2.c[383339,383352] [2022-10-17 17:41:44,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:41:44,490 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:41:44,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44 WrapperNode [2022-10-17 17:41:44,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:41:44,492 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:41:44,492 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:41:44,492 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:41:44,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:44,625 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:45,094 INFO L138 Inliner]: procedures = 60, calls = 66, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 12972 [2022-10-17 17:41:45,095 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:41:45,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:41:45,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:41:45,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:41:45,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:45,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:45,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:45,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:45,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:45,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:45,590 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:45,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:45,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:41:45,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:41:45,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:41:45,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:41:45,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (1/1) ... [2022-10-17 17:41:45,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:41:45,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:41:45,767 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:41:45,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:41:45,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:41:45,914 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-10-17 17:41:45,915 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-10-17 17:41:45,915 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-10-17 17:41:45,915 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-10-17 17:41:45,915 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-10-17 17:41:45,915 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-10-17 17:41:45,915 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-10-17 17:41:45,915 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-10-17 17:41:45,916 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-10-17 17:41:45,916 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-10-17 17:41:45,916 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-10-17 17:41:45,916 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-10-17 17:41:45,916 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-10-17 17:41:45,916 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-10-17 17:41:45,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:41:45,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:41:45,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:41:46,104 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:41:46,107 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:41:55,145 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:41:57,908 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:41:57,908 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-10-17 17:41:57,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:41:57 BoogieIcfgContainer [2022-10-17 17:41:57,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:41:57,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:41:57,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:41:57,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:41:57,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:41:40" (1/3) ... [2022-10-17 17:41:57,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b7d35e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:41:57, skipping insertion in model container [2022-10-17 17:41:57,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:44" (2/3) ... [2022-10-17 17:41:57,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b7d35e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:41:57, skipping insertion in model container [2022-10-17 17:41:57,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:41:57" (3/3) ... [2022-10-17 17:41:57,927 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.08.cil-2.c [2022-10-17 17:41:57,951 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:41:57,951 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-10-17 17:41:58,068 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:41:58,080 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;@71dffac3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:41:58,080 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 17:41:58,094 INFO L276 IsEmpty]: Start isEmpty. Operand has 1793 states, 1759 states have (on average 1.9641841955656623) internal successors, (3455), 1764 states have internal predecessors, (3455), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-10-17 17:41:58,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-10-17 17:41:58,108 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:58,108 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] [2022-10-17 17:41:58,109 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:58,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:58,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1856656814, now seen corresponding path program 1 times [2022-10-17 17:41:58,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:58,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320026108] [2022-10-17 17:41:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:58,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:41:58,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:58,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320026108] [2022-10-17 17:41:58,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320026108] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:58,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:58,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:41:58,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918330118] [2022-10-17 17:41:58,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:58,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:41:58,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:58,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:41:58,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:41:58,745 INFO L87 Difference]: Start difference. First operand has 1793 states, 1759 states have (on average 1.9641841955656623) internal successors, (3455), 1764 states have internal predecessors, (3455), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:41:59,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:59,801 INFO L93 Difference]: Finished difference Result 3712 states and 7223 transitions. [2022-10-17 17:41:59,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:41:59,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2022-10-17 17:41:59,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:59,827 INFO L225 Difference]: With dead ends: 3712 [2022-10-17 17:41:59,828 INFO L226 Difference]: Without dead ends: 1918 [2022-10-17 17:41:59,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:41:59,840 INFO L413 NwaCegarLoop]: 3398 mSDtfsCounter, 3655 mSDsluCounter, 3599 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3655 SdHoareTripleChecker+Valid, 6712 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:59,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3655 Valid, 6712 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-17 17:41:59,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2022-10-17 17:41:59,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1917. [2022-10-17 17:41:59,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1861 states have (on average 1.9333691563675444) internal successors, (3598), 1865 states have internal predecessors, (3598), 42 states have call successors, (42), 13 states have call predecessors, (42), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-10-17 17:41:59,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 3680 transitions. [2022-10-17 17:41:59,999 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 3680 transitions. Word has length 56 [2022-10-17 17:42:00,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:00,000 INFO L495 AbstractCegarLoop]: Abstraction has 1917 states and 3680 transitions. [2022-10-17 17:42:00,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:42:00,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 3680 transitions. [2022-10-17 17:42:00,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-10-17 17:42:00,011 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:00,012 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:00,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:42:00,012 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:00,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:00,014 INFO L85 PathProgramCache]: Analyzing trace with hash 418277872, now seen corresponding path program 1 times [2022-10-17 17:42:00,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:00,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56477830] [2022-10-17 17:42:00,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:00,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-10-17 17:42:00,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:00,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56477830] [2022-10-17 17:42:00,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56477830] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:00,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570707329] [2022-10-17 17:42:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:00,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:00,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:00,467 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:00,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:42:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:00,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:42:00,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:42:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 17:42:00,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:42:00,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570707329] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:00,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:42:00,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-10-17 17:42:00,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552550621] [2022-10-17 17:42:00,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:00,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:00,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:00,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:00,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:42:00,780 INFO L87 Difference]: Start difference. First operand 1917 states and 3680 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:42:01,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:01,336 INFO L93 Difference]: Finished difference Result 2452 states and 4499 transitions. [2022-10-17 17:42:01,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:01,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-10-17 17:42:01,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:01,370 INFO L225 Difference]: With dead ends: 2452 [2022-10-17 17:42:01,370 INFO L226 Difference]: Without dead ends: 2181 [2022-10-17 17:42:01,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:42:01,374 INFO L413 NwaCegarLoop]: 3289 mSDtfsCounter, 3455 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3455 SdHoareTripleChecker+Valid, 3461 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:01,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3455 Valid, 3461 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:42:01,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2022-10-17 17:42:01,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2175. [2022-10-17 17:42:01,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2073 states have (on average 1.8876025084418717) internal successors, (3913), 2078 states have internal predecessors, (3913), 76 states have call successors, (76), 25 states have call predecessors, (76), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2022-10-17 17:42:01,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 4063 transitions. [2022-10-17 17:42:01,497 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 4063 transitions. Word has length 109 [2022-10-17 17:42:01,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:01,498 INFO L495 AbstractCegarLoop]: Abstraction has 2175 states and 4063 transitions. [2022-10-17 17:42:01,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:42:01,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 4063 transitions. [2022-10-17 17:42:01,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-10-17 17:42:01,504 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:01,504 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:01,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-17 17:42:01,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:01,718 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:01,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:01,718 INFO L85 PathProgramCache]: Analyzing trace with hash -458549168, now seen corresponding path program 1 times [2022-10-17 17:42:01,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:01,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197548673] [2022-10-17 17:42:01,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:01,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-10-17 17:42:01,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:01,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197548673] [2022-10-17 17:42:01,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197548673] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:01,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964684926] [2022-10-17 17:42:01,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:01,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:01,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:01,966 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:01,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:42:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:02,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:42:02,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:42:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-10-17 17:42:02,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:42:02,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964684926] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:02,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:42:02,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-10-17 17:42:02,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959784161] [2022-10-17 17:42:02,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:02,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:02,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:02,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:02,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:42:02,232 INFO L87 Difference]: Start difference. First operand 2175 states and 4063 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:42:02,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:02,800 INFO L93 Difference]: Finished difference Result 3220 states and 5658 transitions. [2022-10-17 17:42:02,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:02,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-10-17 17:42:02,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:02,823 INFO L225 Difference]: With dead ends: 3220 [2022-10-17 17:42:02,823 INFO L226 Difference]: Without dead ends: 2691 [2022-10-17 17:42:02,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:42:02,831 INFO L413 NwaCegarLoop]: 3288 mSDtfsCounter, 3464 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3464 SdHoareTripleChecker+Valid, 3460 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:02,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3464 Valid, 3460 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:42:02,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2022-10-17 17:42:02,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2683. [2022-10-17 17:42:02,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2683 states, 2491 states have (on average 1.818948213568848) internal successors, (4531), 2498 states have internal predecessors, (4531), 142 states have call successors, (142), 49 states have call predecessors, (142), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2022-10-17 17:42:02,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2683 states to 2683 states and 4813 transitions. [2022-10-17 17:42:02,976 INFO L78 Accepts]: Start accepts. Automaton has 2683 states and 4813 transitions. Word has length 109 [2022-10-17 17:42:02,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:02,978 INFO L495 AbstractCegarLoop]: Abstraction has 2683 states and 4813 transitions. [2022-10-17 17:42:02,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:42:02,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2683 states and 4813 transitions. [2022-10-17 17:42:02,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-10-17 17:42:02,985 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:02,985 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:03,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:42:03,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:03,210 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:03,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:03,211 INFO L85 PathProgramCache]: Analyzing trace with hash 316446192, now seen corresponding path program 1 times [2022-10-17 17:42:03,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:03,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635978141] [2022-10-17 17:42:03,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:03,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-10-17 17:42:03,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:03,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635978141] [2022-10-17 17:42:03,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635978141] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:03,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202850397] [2022-10-17 17:42:03,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:03,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:03,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:03,371 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:03,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:42:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:03,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:42:03,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:42:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-10-17 17:42:03,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:42:03,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202850397] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:03,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:42:03,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-10-17 17:42:03,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418514766] [2022-10-17 17:42:03,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:03,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:03,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:03,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:03,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:42:03,619 INFO L87 Difference]: Start difference. First operand 2683 states and 4813 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:42:04,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:04,190 INFO L93 Difference]: Finished difference Result 4732 states and 7926 transitions. [2022-10-17 17:42:04,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:04,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-10-17 17:42:04,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:04,220 INFO L225 Difference]: With dead ends: 4732 [2022-10-17 17:42:04,221 INFO L226 Difference]: Without dead ends: 3695 [2022-10-17 17:42:04,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:42:04,234 INFO L413 NwaCegarLoop]: 3253 mSDtfsCounter, 3461 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 3425 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:04,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3461 Valid, 3425 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:42:04,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3695 states. [2022-10-17 17:42:04,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3695 to 3683. [2022-10-17 17:42:04,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3683 states, 3315 states have (on average 1.7324283559577678) internal successors, (5743), 3326 states have internal predecessors, (5743), 270 states have call successors, (270), 97 states have call predecessors, (270), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2022-10-17 17:42:04,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3683 states to 3683 states and 6281 transitions. [2022-10-17 17:42:04,445 INFO L78 Accepts]: Start accepts. Automaton has 3683 states and 6281 transitions. Word has length 109 [2022-10-17 17:42:04,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:04,446 INFO L495 AbstractCegarLoop]: Abstraction has 3683 states and 6281 transitions. [2022-10-17 17:42:04,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:42:04,446 INFO L276 IsEmpty]: Start isEmpty. Operand 3683 states and 6281 transitions. [2022-10-17 17:42:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-10-17 17:42:04,454 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:04,454 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:04,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:42:04,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:04,682 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:04,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:04,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1949629520, now seen corresponding path program 1 times [2022-10-17 17:42:04,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:04,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843578752] [2022-10-17 17:42:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:04,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-10-17 17:42:05,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:05,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843578752] [2022-10-17 17:42:05,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843578752] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:05,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558778825] [2022-10-17 17:42:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:05,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:05,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:05,019 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:05,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:42:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:05,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:42:05,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:42:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 17:42:05,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:42:05,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558778825] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:05,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:42:05,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-10-17 17:42:05,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957440489] [2022-10-17 17:42:05,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:05,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:05,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:05,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:05,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:42:05,263 INFO L87 Difference]: Start difference. First operand 3683 states and 6281 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:42:05,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:05,945 INFO L93 Difference]: Finished difference Result 7708 states and 12362 transitions. [2022-10-17 17:42:05,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:05,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-10-17 17:42:05,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:05,987 INFO L225 Difference]: With dead ends: 7708 [2022-10-17 17:42:05,987 INFO L226 Difference]: Without dead ends: 5671 [2022-10-17 17:42:05,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:42:05,998 INFO L413 NwaCegarLoop]: 3253 mSDtfsCounter, 3449 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3449 SdHoareTripleChecker+Valid, 3425 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:05,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3449 Valid, 3425 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:42:06,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5671 states. [2022-10-17 17:42:06,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5671 to 5651. [2022-10-17 17:42:06,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5651 states, 4939 states have (on average 1.643855031382871) internal successors, (8119), 4958 states have internal predecessors, (8119), 518 states have call successors, (518), 193 states have call predecessors, (518), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2022-10-17 17:42:06,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5651 states to 5651 states and 9153 transitions. [2022-10-17 17:42:06,300 INFO L78 Accepts]: Start accepts. Automaton has 5651 states and 9153 transitions. Word has length 109 [2022-10-17 17:42:06,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:06,300 INFO L495 AbstractCegarLoop]: Abstraction has 5651 states and 9153 transitions. [2022-10-17 17:42:06,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:42:06,301 INFO L276 IsEmpty]: Start isEmpty. Operand 5651 states and 9153 transitions. [2022-10-17 17:42:06,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-10-17 17:42:06,312 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:06,312 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:06,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:42:06,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad8231b-b705-4e19-92f1-64e64f385fcd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:06,525 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:06,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:06,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1026290352, now seen corresponding path program 1 times [2022-10-17 17:42:06,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:06,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643197864] [2022-10-17 17:42:06,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:06,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:06,660 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-10-17 17:42:06,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:06,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643197864] [2022-10-17 17:42:06,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643197864] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:06,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:06,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:42:06,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100805885] [2022-10-17 17:42:06,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:06,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:06,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:06,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:06,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:06,664 INFO L87 Difference]: Start difference. First operand 5651 states and 9153 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8)