./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ede8216-f6fc-4970-9c3e-d24decc42941/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ede8216-f6fc-4970-9c3e-d24decc42941/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_3ede8216-f6fc-4970-9c3e-d24decc42941/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ede8216-f6fc-4970-9c3e-d24decc42941/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ede8216-f6fc-4970-9c3e-d24decc42941/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_3ede8216-f6fc-4970-9c3e-d24decc42941/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 284334fdd31c4c26d16d0bf558a458f462d11a8d54419841fe6fc9cdbb9a1cfc --- 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 17:14:30,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:14:30,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:14:30,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:14:30,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:14:30,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:14:30,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:14:30,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:14:30,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:14:30,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:14:30,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:14:30,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:14:30,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:14:30,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:14:30,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:14:30,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:14:30,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:14:30,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:14:30,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:14:30,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:14:30,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:14:30,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:14:30,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:14:30,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:14:30,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:14:30,266 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:14:30,267 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:14:30,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:14:30,269 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:14:30,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:14:30,271 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:14:30,272 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:14:30,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:14:30,274 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:14:30,275 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:14:30,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:14:30,276 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:14:30,277 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:14:30,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:14:30,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:14:30,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:14:30,283 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ede8216-f6fc-4970-9c3e-d24decc42941/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:14:30,330 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:14:30,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:14:30,331 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:14:30,331 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:14:30,332 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:14:30,333 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:14:30,333 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:14:30,333 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:14:30,334 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:14:30,334 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:14:30,335 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:14:30,335 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:14:30,336 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:14:30,336 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:14:30,336 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:14:30,337 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:14:30,337 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:14:30,337 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:14:30,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:14:30,338 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:14:30,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:14:30,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:14:30,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:14:30,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:14:30,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:14:30,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:14:30,340 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:14:30,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:14:30,341 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:14:30,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:14:30,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:14:30,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:14:30,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:14:30,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:14:30,343 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:14:30,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:14:30,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:14:30,344 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:14:30,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:14:30,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:14:30,345 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:14:30,345 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_3ede8216-f6fc-4970-9c3e-d24decc42941/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ede8216-f6fc-4970-9c3e-d24decc42941/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 284334fdd31c4c26d16d0bf558a458f462d11a8d54419841fe6fc9cdbb9a1cfc [2022-10-17 17:14:30,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:14:30,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:14:30,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:14:30,668 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:14:30,669 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:14:30,670 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ede8216-f6fc-4970-9c3e-d24decc42941/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c [2022-10-17 17:14:30,747 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ede8216-f6fc-4970-9c3e-d24decc42941/bin/utaipan-G1rejxKTta/data/7a4e37efb/eb73ea493ce04e2abde4a0a7c4c4da07/FLAGf2362070f [2022-10-17 17:14:31,245 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:14:31,246 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ede8216-f6fc-4970-9c3e-d24decc42941/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c [2022-10-17 17:14:31,261 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ede8216-f6fc-4970-9c3e-d24decc42941/bin/utaipan-G1rejxKTta/data/7a4e37efb/eb73ea493ce04e2abde4a0a7c4c4da07/FLAGf2362070f [2022-10-17 17:14:31,564 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ede8216-f6fc-4970-9c3e-d24decc42941/bin/utaipan-G1rejxKTta/data/7a4e37efb/eb73ea493ce04e2abde4a0a7c4c4da07 [2022-10-17 17:14:31,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:14:31,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:14:31,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:14:31,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:14:31,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:14:31,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:14:31" (1/1) ... [2022-10-17 17:14:31,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2df96dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:31, skipping insertion in model container [2022-10-17 17:14:31,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:14:31" (1/1) ... [2022-10-17 17:14:31,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:14:31,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:14:31,864 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_3ede8216-f6fc-4970-9c3e-d24decc42941/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[914,927] [2022-10-17 17:14:31,982 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_3ede8216-f6fc-4970-9c3e-d24decc42941/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[7115,7128] [2022-10-17 17:14:32,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:14:32,093 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:14:32,106 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_3ede8216-f6fc-4970-9c3e-d24decc42941/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[914,927] [2022-10-17 17:14:32,123 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_3ede8216-f6fc-4970-9c3e-d24decc42941/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[7115,7128] [2022-10-17 17:14:32,155 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:14:32,190 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:14:32,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:32 WrapperNode [2022-10-17 17:14:32,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:14:32,193 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:14:32,193 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:14:32,193 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:14:32,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:32" (1/1) ... [2022-10-17 17:14:32,217 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:32" (1/1) ... [2022-10-17 17:14:32,266 INFO L138 Inliner]: procedures = 61, calls = 69, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 576 [2022-10-17 17:14:32,266 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:14:32,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:14:32,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:14:32,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:14:32,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:32" (1/1) ... [2022-10-17 17:14:32,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:32" (1/1) ... [2022-10-17 17:14:32,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:32" (1/1) ... [2022-10-17 17:14:32,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:32" (1/1) ... [2022-10-17 17:14:32,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:32" (1/1) ... [2022-10-17 17:14:32,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:32" (1/1) ... [2022-10-17 17:14:32,313 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:32" (1/1) ... [2022-10-17 17:14:32,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:32" (1/1) ... [2022-10-17 17:14:32,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:14:32,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:14:32,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:14:32,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:14:32,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:32" (1/1) ... [2022-10-17 17:14:32,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:14:32,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ede8216-f6fc-4970-9c3e-d24decc42941/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:14:32,353 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ede8216-f6fc-4970-9c3e-d24decc42941/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:14:32,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ede8216-f6fc-4970-9c3e-d24decc42941/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:14:32,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:14:32,412 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-10-17 17:14:32,412 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-10-17 17:14:32,412 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-10-17 17:14:32,413 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-10-17 17:14:32,413 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-10-17 17:14:32,413 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-10-17 17:14:32,413 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-10-17 17:14:32,413 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-10-17 17:14:32,414 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-10-17 17:14:32,414 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-10-17 17:14:32,414 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-10-17 17:14:32,414 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-10-17 17:14:32,414 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-10-17 17:14:32,415 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-10-17 17:14:32,415 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-10-17 17:14:32,415 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-10-17 17:14:32,415 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-10-17 17:14:32,415 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-10-17 17:14:32,416 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-10-17 17:14:32,416 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-10-17 17:14:32,416 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-10-17 17:14:32,416 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-10-17 17:14:32,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:14:32,417 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-10-17 17:14:32,417 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-10-17 17:14:32,417 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-10-17 17:14:32,417 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-10-17 17:14:32,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:14:32,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:14:32,418 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-10-17 17:14:32,418 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-10-17 17:14:32,526 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:14:32,536 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:14:33,618 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:14:34,047 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:14:34,048 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-10-17 17:14:34,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:14:34 BoogieIcfgContainer [2022-10-17 17:14:34,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:14:34,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:14:34,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:14:34,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:14:34,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:14:31" (1/3) ... [2022-10-17 17:14:34,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17420739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:14:34, skipping insertion in model container [2022-10-17 17:14:34,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:32" (2/3) ... [2022-10-17 17:14:34,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17420739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:14:34, skipping insertion in model container [2022-10-17 17:14:34,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:14:34" (3/3) ... [2022-10-17 17:14:34,064 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.04.cil-1.c [2022-10-17 17:14:34,087 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:14:34,087 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-10-17 17:14:34,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:14:34,154 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;@36bce1b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:14:34,155 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 17:14:34,160 INFO L276 IsEmpty]: Start isEmpty. Operand has 172 states, 123 states have (on average 1.5040650406504066) internal successors, (185), 129 states have internal predecessors, (185), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-10-17 17:14:34,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-17 17:14:34,173 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:14:34,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:14:34,174 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:14:34,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:14:34,180 INFO L85 PathProgramCache]: Analyzing trace with hash 2144976466, now seen corresponding path program 1 times [2022-10-17 17:14:34,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:14:34,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900483798] [2022-10-17 17:14:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:14:34,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:14:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:14:34,537 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 17:14:34,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:14:34,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900483798] [2022-10-17 17:14:34,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900483798] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:14:34,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:14:34,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:14:34,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909656806] [2022-10-17 17:14:34,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:14:34,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:14:34,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:14:34,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:14:34,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:14:34,587 INFO L87 Difference]: Start difference. First operand has 172 states, 123 states have (on average 1.5040650406504066) internal successors, (185), 129 states have internal predecessors, (185), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-17 17:14:35,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:14:35,185 INFO L93 Difference]: Finished difference Result 395 states and 569 transitions. [2022-10-17 17:14:35,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:14:35,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-10-17 17:14:35,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:14:35,200 INFO L225 Difference]: With dead ends: 395 [2022-10-17 17:14:35,200 INFO L226 Difference]: Without dead ends: 227 [2022-10-17 17:14:35,205 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 17:14:35,209 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 297 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:14:35,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 424 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:14:35,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-10-17 17:14:35,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 220. [2022-10-17 17:14:35,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 158 states have (on average 1.379746835443038) internal successors, (218), 162 states have internal predecessors, (218), 40 states have call successors, (40), 21 states have call predecessors, (40), 20 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-10-17 17:14:35,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 296 transitions. [2022-10-17 17:14:35,281 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 296 transitions. Word has length 45 [2022-10-17 17:14:35,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:14:35,282 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 296 transitions. [2022-10-17 17:14:35,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-17 17:14:35,282 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 296 transitions. [2022-10-17 17:14:35,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-17 17:14:35,286 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:14:35,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:14:35,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:14:35,287 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:14:35,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:14:35,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1231016207, now seen corresponding path program 1 times [2022-10-17 17:14:35,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:14:35,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926328624] [2022-10-17 17:14:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:14:35,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:14:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:14:35,814 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 17:14:35,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:14:35,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926328624] [2022-10-17 17:14:35,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926328624] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:14:35,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:14:35,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 17:14:35,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428516061] [2022-10-17 17:14:35,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:14:35,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:14:35,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:14:35,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:14:35,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:14:35,833 INFO L87 Difference]: Start difference. First operand 220 states and 296 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-10-17 17:14:36,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:14:36,678 INFO L93 Difference]: Finished difference Result 401 states and 517 transitions. [2022-10-17 17:14:36,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 17:14:36,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2022-10-17 17:14:36,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:14:36,686 INFO L225 Difference]: With dead ends: 401 [2022-10-17 17:14:36,687 INFO L226 Difference]: Without dead ends: 285 [2022-10-17 17:14:36,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-10-17 17:14:36,691 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 354 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 17:14:36,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 741 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 17:14:36,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-10-17 17:14:36,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 272. [2022-10-17 17:14:36,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 195 states have (on average 1.358974358974359) internal successors, (265), 199 states have internal predecessors, (265), 48 states have call successors, (48), 28 states have call predecessors, (48), 27 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-10-17 17:14:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 359 transitions. [2022-10-17 17:14:36,768 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 359 transitions. Word has length 45 [2022-10-17 17:14:36,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:14:36,769 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 359 transitions. [2022-10-17 17:14:36,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-10-17 17:14:36,770 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 359 transitions. [2022-10-17 17:14:36,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-17 17:14:36,780 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:14:36,780 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] [2022-10-17 17:14:36,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:14:36,781 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:14:36,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:14:36,781 INFO L85 PathProgramCache]: Analyzing trace with hash 2125755935, now seen corresponding path program 1 times [2022-10-17 17:14:36,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:14:36,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007621456] [2022-10-17 17:14:36,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:14:36,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:14:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:14:37,006 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 17:14:37,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:14:37,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007621456] [2022-10-17 17:14:37,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007621456] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:14:37,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:14:37,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:14:37,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394975698] [2022-10-17 17:14:37,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:14:37,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:14:37,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:14:37,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:14:37,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:14:37,013 INFO L87 Difference]: Start difference. First operand 272 states and 359 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:14:37,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:14:37,850 INFO L93 Difference]: Finished difference Result 710 states and 1042 transitions. [2022-10-17 17:14:37,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:14:37,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 43 [2022-10-17 17:14:37,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:14:37,863 INFO L225 Difference]: With dead ends: 710 [2022-10-17 17:14:37,863 INFO L226 Difference]: Without dead ends: 617 [2022-10-17 17:14:37,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:14:37,879 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 703 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:14:37,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 727 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-17 17:14:37,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-10-17 17:14:37,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 606. [2022-10-17 17:14:37,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 452 states have (on average 1.404867256637168) internal successors, (635), 459 states have internal predecessors, (635), 101 states have call successors, (101), 52 states have call predecessors, (101), 51 states have return successors, (129), 96 states have call predecessors, (129), 99 states have call successors, (129) [2022-10-17 17:14:37,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 865 transitions. [2022-10-17 17:14:37,998 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 865 transitions. Word has length 43 [2022-10-17 17:14:37,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:14:37,999 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 865 transitions. [2022-10-17 17:14:37,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:14:38,000 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 865 transitions. [2022-10-17 17:14:38,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-10-17 17:14:38,004 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:14:38,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:14:38,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:14:38,005 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:14:38,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:14:38,007 INFO L85 PathProgramCache]: Analyzing trace with hash 570857465, now seen corresponding path program 1 times [2022-10-17 17:14:38,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:14:38,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878130002] [2022-10-17 17:14:38,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:14:38,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:14:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:14:38,092 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 17:14:38,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:14:38,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878130002] [2022-10-17 17:14:38,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878130002] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:14:38,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:14:38,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:14:38,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435439009] [2022-10-17 17:14:38,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:14:38,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:14:38,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:14:38,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:14:38,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:14:38,097 INFO L87 Difference]: Start difference. First operand 606 states and 865 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:14:38,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:14:38,329 INFO L93 Difference]: Finished difference Result 934 states and 1271 transitions. [2022-10-17 17:14:38,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:14:38,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-10-17 17:14:38,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:14:38,341 INFO L225 Difference]: With dead ends: 934 [2022-10-17 17:14:38,342 INFO L226 Difference]: Without dead ends: 765 [2022-10-17 17:14:38,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:14:38,353 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 208 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:14:38,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 263 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:14:38,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-10-17 17:14:38,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 746. [2022-10-17 17:14:38,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 547 states have (on average 1.3619744058500913) internal successors, (745), 554 states have internal predecessors, (745), 125 states have call successors, (125), 73 states have call predecessors, (125), 72 states have return successors, (153), 120 states have call predecessors, (153), 123 states have call successors, (153) [2022-10-17 17:14:38,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1023 transitions. [2022-10-17 17:14:38,467 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1023 transitions. Word has length 46 [2022-10-17 17:14:38,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:14:38,467 INFO L495 AbstractCegarLoop]: Abstraction has 746 states and 1023 transitions. [2022-10-17 17:14:38,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:14:38,468 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1023 transitions. [2022-10-17 17:14:38,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 17:14:38,469 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:14:38,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:14:38,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:14:38,470 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:14:38,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:14:38,470 INFO L85 PathProgramCache]: Analyzing trace with hash 431018710, now seen corresponding path program 1 times [2022-10-17 17:14:38,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:14:38,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594606966] [2022-10-17 17:14:38,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:14:38,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:14:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:14:38,517 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 17:14:38,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:14:38,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594606966] [2022-10-17 17:14:38,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594606966] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:14:38,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:14:38,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:14:38,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036313800] [2022-10-17 17:14:38,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:14:38,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:14:38,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:14:38,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:14:38,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:14:38,522 INFO L87 Difference]: Start difference. First operand 746 states and 1023 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:14:38,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:14:38,717 INFO L93 Difference]: Finished difference Result 1116 states and 1468 transitions. [2022-10-17 17:14:38,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:14:38,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-10-17 17:14:38,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:14:38,726 INFO L225 Difference]: With dead ends: 1116 [2022-10-17 17:14:38,726 INFO L226 Difference]: Without dead ends: 853 [2022-10-17 17:14:38,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:14:38,728 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 67 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:14:38,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 379 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:14:38,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-10-17 17:14:38,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 847. [2022-10-17 17:14:38,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 618 states have (on average 1.3478964401294498) internal successors, (833), 625 states have internal predecessors, (833), 141 states have call successors, (141), 87 states have call predecessors, (141), 86 states have return successors, (169), 136 states have call predecessors, (169), 139 states have call successors, (169) [2022-10-17 17:14:38,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1143 transitions. [2022-10-17 17:14:38,840 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1143 transitions. Word has length 47 [2022-10-17 17:14:38,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:14:38,841 INFO L495 AbstractCegarLoop]: Abstraction has 847 states and 1143 transitions. [2022-10-17 17:14:38,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:14:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1143 transitions. [2022-10-17 17:14:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-10-17 17:14:38,844 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:14:38,844 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:14:38,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:14:38,845 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:14:38,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:14:38,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1272476420, now seen corresponding path program 1 times [2022-10-17 17:14:38,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:14:38,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540795747] [2022-10-17 17:14:38,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:14:38,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:14:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:14:38,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:14:38,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:14:38,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540795747] [2022-10-17 17:14:38,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540795747] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:14:38,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:14:38,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:14:38,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855563474] [2022-10-17 17:14:38,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:14:38,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:14:38,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:14:38,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:14:38,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:14:38,961 INFO L87 Difference]: Start difference. First operand 847 states and 1143 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-10-17 17:14:39,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:14:39,348 INFO L93 Difference]: Finished difference Result 954 states and 1269 transitions. [2022-10-17 17:14:39,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:14:39,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-10-17 17:14:39,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:14:39,357 INFO L225 Difference]: With dead ends: 954 [2022-10-17 17:14:39,358 INFO L226 Difference]: Without dead ends: 951 [2022-10-17 17:14:39,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:14:39,360 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 376 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:14:39,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 246 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:14:39,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-10-17 17:14:39,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 846. [2022-10-17 17:14:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 618 states have (on average 1.343042071197411) internal successors, (830), 624 states have internal predecessors, (830), 140 states have call successors, (140), 87 states have call predecessors, (140), 86 states have return successors, (169), 136 states have call predecessors, (169), 139 states have call successors, (169) [2022-10-17 17:14:39,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1139 transitions. [2022-10-17 17:14:39,493 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1139 transitions. Word has length 54 [2022-10-17 17:14:39,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:14:39,494 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1139 transitions. [2022-10-17 17:14:39,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-10-17 17:14:39,495 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1139 transitions. [2022-10-17 17:14:39,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-10-17 17:14:39,496 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:14:39,497 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:14:39,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:14:39,497 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:14:39,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:14:39,498 INFO L85 PathProgramCache]: Analyzing trace with hash -792910145, now seen corresponding path program 1 times [2022-10-17 17:14:39,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:14:39,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811205072] [2022-10-17 17:14:39,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:14:39,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:14:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:14:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:14:39,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:14:39,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811205072] [2022-10-17 17:14:39,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811205072] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:14:39,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518073457] [2022-10-17 17:14:39,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:14:39,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:14:39,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ede8216-f6fc-4970-9c3e-d24decc42941/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:14:39,684 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ede8216-f6fc-4970-9c3e-d24decc42941/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:14:39,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ede8216-f6fc-4970-9c3e-d24decc42941/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:14:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:14:39,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 17:14:39,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:14:40,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:14:40,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:14:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:14:40,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518073457] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:14:40,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1133130689] [2022-10-17 17:14:40,547 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-10-17 17:14:40,547 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:14:40,552 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:14:40,559 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:14:40,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:14:44,387 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 125 for LOIs [2022-10-17 17:14:44,413 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 121 for LOIs [2022-10-17 17:14:44,436 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 129 for LOIs [2022-10-17 17:14:44,863 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 125 for LOIs [2022-10-17 17:14:44,916 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 125 for LOIs [2022-10-17 17:14:44,969 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 125 for LOIs [2022-10-17 17:14:44,993 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 132 for LOIs [2022-10-17 17:14:45,016 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:14:58,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1133130689] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:14:58,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:14:58,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [5, 5, 4] total 44 [2022-10-17 17:14:58,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296536243] [2022-10-17 17:14:58,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:14:58,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-10-17 17:14:58,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:14:58,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-10-17 17:14:58,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2022-10-17 17:14:58,495 INFO L87 Difference]: Start difference. First operand 846 states and 1139 transitions. Second operand has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)