./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.11.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.11.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI --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 79f20a4b12634e812af836a5fe92e9d987e7766e2c28337c49504608346f2347 --- 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-5e519f3 [2022-11-03 01:56:49,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:56:49,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:56:49,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:56:49,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:56:49,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:56:49,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:56:49,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:56:49,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:56:49,190 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:56:49,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:56:49,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:56:49,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:56:49,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:56:49,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:56:49,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:56:49,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:56:49,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:56:49,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:56:49,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:56:49,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:56:49,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:56:49,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:56:49,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:56:49,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:56:49,227 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:56:49,227 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:56:49,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:56:49,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:56:49,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:56:49,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:56:49,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:56:49,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:56:49,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:56:49,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:56:49,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:56:49,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:56:49,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:56:49,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:56:49,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:56:49,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:56:49,240 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:56:49,279 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:56:49,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:56:49,280 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:56:49,281 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:56:49,281 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:56:49,282 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:56:49,282 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:56:49,282 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:56:49,282 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:56:49,282 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:56:49,284 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:56:49,284 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:56:49,284 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:56:49,284 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:56:49,284 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:56:49,285 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:56:49,285 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:56:49,285 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:56:49,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:56:49,286 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:56:49,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:56:49,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:56:49,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:56:49,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:56:49,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:56:49,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:56:49,287 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:56:49,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:56:49,288 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:56:49,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:56:49,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:56:49,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:56:49,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:56:49,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:56:49,289 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:56:49,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:56:49,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:56:49,290 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:56:49,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:56:49,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:56:49,291 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:56:49,291 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_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79f20a4b12634e812af836a5fe92e9d987e7766e2c28337c49504608346f2347 [2022-11-03 01:56:49,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:56:49,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:56:49,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:56:49,549 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:56:49,550 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:56:49,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/systemc/token_ring.11.cil-1.c [2022-11-03 01:56:49,636 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/data/783e34bfa/2f458cdf77a042f196b0d81fce210eeb/FLAG9db5a59a7 [2022-11-03 01:56:50,212 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:56:50,212 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/sv-benchmarks/c/systemc/token_ring.11.cil-1.c [2022-11-03 01:56:50,231 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/data/783e34bfa/2f458cdf77a042f196b0d81fce210eeb/FLAG9db5a59a7 [2022-11-03 01:56:50,500 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/data/783e34bfa/2f458cdf77a042f196b0d81fce210eeb [2022-11-03 01:56:50,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:56:50,504 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:56:50,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:56:50,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:56:50,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:56:50,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:56:50" (1/1) ... [2022-11-03 01:56:50,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a8d9bbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:50, skipping insertion in model container [2022-11-03 01:56:50,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:56:50" (1/1) ... [2022-11-03 01:56:50,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:56:50,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:56:50,785 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_660b89d1-627a-4e23-9689-bd4484a67936/sv-benchmarks/c/systemc/token_ring.11.cil-1.c[671,684] [2022-11-03 01:56:50,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:56:50,913 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:56:50,928 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_660b89d1-627a-4e23-9689-bd4484a67936/sv-benchmarks/c/systemc/token_ring.11.cil-1.c[671,684] [2022-11-03 01:56:51,049 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:56:51,074 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:56:51,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:51 WrapperNode [2022-11-03 01:56:51,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:56:51,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:56:51,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:56:51,077 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:56:51,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:51" (1/1) ... [2022-11-03 01:56:51,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:51" (1/1) ... [2022-11-03 01:56:51,157 INFO L138 Inliner]: procedures = 50, calls = 65, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 800 [2022-11-03 01:56:51,158 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:56:51,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:56:51,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:56:51,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:56:51,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:51" (1/1) ... [2022-11-03 01:56:51,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:51" (1/1) ... [2022-11-03 01:56:51,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:51" (1/1) ... [2022-11-03 01:56:51,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:51" (1/1) ... [2022-11-03 01:56:51,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:51" (1/1) ... [2022-11-03 01:56:51,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:51" (1/1) ... [2022-11-03 01:56:51,219 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:51" (1/1) ... [2022-11-03 01:56:51,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:51" (1/1) ... [2022-11-03 01:56:51,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:56:51,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:56:51,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:56:51,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:56:51,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:51" (1/1) ... [2022-11-03 01:56:51,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:56:51,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:51,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:56:51,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:56:51,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:56:51,308 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 01:56:51,309 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 01:56:51,309 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 01:56:51,309 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 01:56:51,309 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 01:56:51,309 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 01:56:51,310 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-03 01:56:51,310 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-03 01:56:51,310 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 01:56:51,310 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 01:56:51,310 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 01:56:51,311 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 01:56:51,311 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 01:56:51,311 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 01:56:51,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:56:51,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:56:51,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:56:51,492 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:56:51,494 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:56:52,333 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:56:52,808 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:56:52,808 INFO L300 CfgBuilder]: Removed 14 assume(true) statements. [2022-11-03 01:56:52,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:56:52 BoogieIcfgContainer [2022-11-03 01:56:52,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:56:52,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:56:52,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:56:52,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:56:52,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:56:50" (1/3) ... [2022-11-03 01:56:52,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d188668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:56:52, skipping insertion in model container [2022-11-03 01:56:52,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:51" (2/3) ... [2022-11-03 01:56:52,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d188668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:56:52, skipping insertion in model container [2022-11-03 01:56:52,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:56:52" (3/3) ... [2022-11-03 01:56:52,825 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.11.cil-1.c [2022-11-03 01:56:52,845 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:56:52,846 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:56:52,930 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:56:52,947 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;@7a9f3351, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:56:52,947 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:56:52,959 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 147 states have (on average 1.564625850340136) internal successors, (230), 151 states have internal predecessors, (230), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-03 01:56:52,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 01:56:52,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:52,970 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:52,970 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:52,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:52,976 INFO L85 PathProgramCache]: Analyzing trace with hash 986730501, now seen corresponding path program 1 times [2022-11-03 01:56:52,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:52,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104376050] [2022-11-03 01:56:52,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:52,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:53,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:53,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104376050] [2022-11-03 01:56:53,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104376050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:53,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:53,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:56:53,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039095303] [2022-11-03 01:56:53,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:53,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:56:53,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:53,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:56:53,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:56:53,564 INFO L87 Difference]: Start difference. First operand has 183 states, 147 states have (on average 1.564625850340136) internal successors, (230), 151 states have internal predecessors, (230), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2022-11-03 01:56:54,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:54,125 INFO L93 Difference]: Finished difference Result 526 states and 833 transitions. [2022-11-03 01:56:54,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:56:54,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 64 [2022-11-03 01:56:54,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:54,145 INFO L225 Difference]: With dead ends: 526 [2022-11-03 01:56:54,146 INFO L226 Difference]: Without dead ends: 344 [2022-11-03 01:56:54,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:56:54,160 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 487 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:54,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 766 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:56:54,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-03 01:56:54,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 343. [2022-11-03 01:56:54,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 282 states have (on average 1.524822695035461) internal successors, (430), 285 states have internal predecessors, (430), 48 states have call successors, (48), 13 states have call predecessors, (48), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-03 01:56:54,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 524 transitions. [2022-11-03 01:56:54,235 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 524 transitions. Word has length 64 [2022-11-03 01:56:54,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:54,235 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 524 transitions. [2022-11-03 01:56:54,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2022-11-03 01:56:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 524 transitions. [2022-11-03 01:56:54,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 01:56:54,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:54,242 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:54,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:56:54,243 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:54,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:54,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1571274786, now seen corresponding path program 1 times [2022-11-03 01:56:54,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:54,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245465816] [2022-11-03 01:56:54,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:54,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:56:54,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:54,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245465816] [2022-11-03 01:56:54,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245465816] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:54,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987329224] [2022-11-03 01:56:54,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:54,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:54,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:54,636 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:54,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:56:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:54,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:56:54,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:56:55,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:56:55,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987329224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:55,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:56:55,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 01:56:55,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189357900] [2022-11-03 01:56:55,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:55,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:56:55,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:55,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:56:55,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:56:55,103 INFO L87 Difference]: Start difference. First operand 343 states and 524 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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) [2022-11-03 01:56:55,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:55,266 INFO L93 Difference]: Finished difference Result 1012 states and 1573 transitions. [2022-11-03 01:56:55,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:56:55,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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 129 [2022-11-03 01:56:55,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:55,274 INFO L225 Difference]: With dead ends: 1012 [2022-11-03 01:56:55,275 INFO L226 Difference]: Without dead ends: 674 [2022-11-03 01:56:55,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:56:55,278 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 225 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:55,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 503 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:56:55,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-11-03 01:56:55,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 668. [2022-11-03 01:56:55,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 555 states have (on average 1.5225225225225225) internal successors, (845), 559 states have internal predecessors, (845), 88 states have call successors, (88), 25 states have call predecessors, (88), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-03 01:56:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1019 transitions. [2022-11-03 01:56:55,367 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1019 transitions. Word has length 129 [2022-11-03 01:56:55,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:55,367 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 1019 transitions. [2022-11-03 01:56:55,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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) [2022-11-03 01:56:55,368 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1019 transitions. [2022-11-03 01:56:55,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 01:56:55,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:55,371 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:55,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:55,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:55,595 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:55,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:55,596 INFO L85 PathProgramCache]: Analyzing trace with hash 269620188, now seen corresponding path program 1 times [2022-11-03 01:56:55,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:55,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440872588] [2022-11-03 01:56:55,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:55,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:56:55,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:55,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440872588] [2022-11-03 01:56:55,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440872588] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:55,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29061447] [2022-11-03 01:56:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:55,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:55,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:55,748 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:55,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:56:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:55,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:56:55,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 01:56:56,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:56:56,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29061447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:56,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:56:56,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 01:56:56,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987216554] [2022-11-03 01:56:56,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:56,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:56:56,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:56,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:56:56,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:56:56,055 INFO L87 Difference]: Start difference. First operand 668 states and 1019 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2022-11-03 01:56:56,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:56,267 INFO L93 Difference]: Finished difference Result 1981 states and 3074 transitions. [2022-11-03 01:56:56,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:56:56,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 129 [2022-11-03 01:56:56,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:56,281 INFO L225 Difference]: With dead ends: 1981 [2022-11-03 01:56:56,281 INFO L226 Difference]: Without dead ends: 1318 [2022-11-03 01:56:56,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:56:56,288 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 249 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:56,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 491 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:56:56,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2022-11-03 01:56:56,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1310. [2022-11-03 01:56:56,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1095 states have (on average 1.5187214611872146) internal successors, (1663), 1101 states have internal predecessors, (1663), 166 states have call successors, (166), 49 states have call predecessors, (166), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2022-11-03 01:56:56,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1993 transitions. [2022-11-03 01:56:56,372 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1993 transitions. Word has length 129 [2022-11-03 01:56:56,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:56,372 INFO L495 AbstractCegarLoop]: Abstraction has 1310 states and 1993 transitions. [2022-11-03 01:56:56,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2022-11-03 01:56:56,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1993 transitions. [2022-11-03 01:56:56,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 01:56:56,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:56,379 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:56,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 01:56:56,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:56,599 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:56,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:56,600 INFO L85 PathProgramCache]: Analyzing trace with hash 439307738, now seen corresponding path program 1 times [2022-11-03 01:56:56,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:56,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685278945] [2022-11-03 01:56:56,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:56,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:56:56,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:56,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685278945] [2022-11-03 01:56:56,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685278945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:56,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508470074] [2022-11-03 01:56:56,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:56,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:56,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:56,734 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:56,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:56:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:56,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:56:56,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:56:57,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:56:57,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508470074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:57,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:56:57,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 01:56:57,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578436640] [2022-11-03 01:56:57,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:57,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:56:57,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:57,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:56:57,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:56:57,051 INFO L87 Difference]: Start difference. First operand 1310 states and 1993 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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) [2022-11-03 01:56:57,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:57,276 INFO L93 Difference]: Finished difference Result 3895 states and 6026 transitions. [2022-11-03 01:56:57,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:56:57,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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 129 [2022-11-03 01:56:57,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:57,290 INFO L225 Difference]: With dead ends: 3895 [2022-11-03 01:56:57,291 INFO L226 Difference]: Without dead ends: 2590 [2022-11-03 01:56:57,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:56:57,297 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 237 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:57,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 476 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:56:57,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2022-11-03 01:56:57,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2578. [2022-11-03 01:56:57,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2578 states, 2163 states have (on average 1.514100785945446) internal successors, (3275), 2173 states have internal predecessors, (3275), 318 states have call successors, (318), 97 states have call predecessors, (318), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2022-11-03 01:56:57,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 3909 transitions. [2022-11-03 01:56:57,453 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 3909 transitions. Word has length 129 [2022-11-03 01:56:57,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:57,454 INFO L495 AbstractCegarLoop]: Abstraction has 2578 states and 3909 transitions. [2022-11-03 01:56:57,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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) [2022-11-03 01:56:57,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 3909 transitions. [2022-11-03 01:56:57,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 01:56:57,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:57,460 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:57,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:57,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:57,675 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:57,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:57,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1589974232, now seen corresponding path program 1 times [2022-11-03 01:56:57,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:57,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091809709] [2022-11-03 01:56:57,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:57,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:56:57,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:57,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091809709] [2022-11-03 01:56:57,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091809709] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:57,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381325265] [2022-11-03 01:56:57,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:57,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:57,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:57,800 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:57,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:56:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:58,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:56:58,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 01:56:58,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:56:58,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381325265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:58,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:56:58,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 01:56:58,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062904557] [2022-11-03 01:56:58,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:58,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:56:58,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:58,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:56:58,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:56:58,072 INFO L87 Difference]: Start difference. First operand 2578 states and 3909 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (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) [2022-11-03 01:56:58,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:58,393 INFO L93 Difference]: Finished difference Result 7675 states and 11830 transitions. [2022-11-03 01:56:58,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:56:58,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (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 129 [2022-11-03 01:56:58,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:58,418 INFO L225 Difference]: With dead ends: 7675 [2022-11-03 01:56:58,418 INFO L226 Difference]: Without dead ends: 5102 [2022-11-03 01:56:58,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:56:58,430 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 252 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:58,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 500 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:56:58,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5102 states. [2022-11-03 01:56:58,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5102 to 5082. [2022-11-03 01:56:58,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5082 states, 4275 states have (on average 1.5090058479532165) internal successors, (6451), 4293 states have internal predecessors, (6451), 614 states have call successors, (614), 193 states have call predecessors, (614), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2022-11-03 01:56:58,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5082 states to 5082 states and 7677 transitions. [2022-11-03 01:56:58,732 INFO L78 Accepts]: Start accepts. Automaton has 5082 states and 7677 transitions. Word has length 129 [2022-11-03 01:56:58,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:58,733 INFO L495 AbstractCegarLoop]: Abstraction has 5082 states and 7677 transitions. [2022-11-03 01:56:58,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (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) [2022-11-03 01:56:58,733 INFO L276 IsEmpty]: Start isEmpty. Operand 5082 states and 7677 transitions. [2022-11-03 01:56:58,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 01:56:58,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:58,744 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:58,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:58,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:58,959 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:58,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:58,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1575268890, now seen corresponding path program 1 times [2022-11-03 01:56:58,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:58,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360218533] [2022-11-03 01:56:58,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:58,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:56:59,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:59,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360218533] [2022-11-03 01:56:59,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360218533] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:59,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202261022] [2022-11-03 01:56:59,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:59,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:59,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:59,098 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:59,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:56:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:59,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:56:59,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 01:56:59,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:56:59,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202261022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:59,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:56:59,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 01:56:59,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851004950] [2022-11-03 01:56:59,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:59,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:56:59,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:59,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:56:59,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:56:59,406 INFO L87 Difference]: Start difference. First operand 5082 states and 7677 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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) [2022-11-03 01:56:59,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:59,900 INFO L93 Difference]: Finished difference Result 15139 states and 23238 transitions. [2022-11-03 01:56:59,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:56:59,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 129 [2022-11-03 01:56:59,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:59,965 INFO L225 Difference]: With dead ends: 15139 [2022-11-03 01:56:59,965 INFO L226 Difference]: Without dead ends: 10062 [2022-11-03 01:57:00,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:57:00,010 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 231 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:00,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 465 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:57:00,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10062 states. [2022-11-03 01:57:00,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10062 to 10026. [2022-11-03 01:57:00,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10026 states, 8451 states have (on average 1.5036090403502544) internal successors, (12707), 8485 states have internal predecessors, (12707), 1190 states have call successors, (1190), 385 states have call predecessors, (1190), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2022-11-03 01:57:00,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10026 states to 10026 states and 15085 transitions. [2022-11-03 01:57:00,637 INFO L78 Accepts]: Start accepts. Automaton has 10026 states and 15085 transitions. Word has length 129 [2022-11-03 01:57:00,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:00,641 INFO L495 AbstractCegarLoop]: Abstraction has 10026 states and 15085 transitions. [2022-11-03 01:57:00,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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) [2022-11-03 01:57:00,642 INFO L276 IsEmpty]: Start isEmpty. Operand 10026 states and 15085 transitions. [2022-11-03 01:57:00,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 01:57:00,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:00,661 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:00,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:00,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 01:57:00,887 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:00,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:00,888 INFO L85 PathProgramCache]: Analyzing trace with hash 472059800, now seen corresponding path program 1 times [2022-11-03 01:57:00,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:00,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586565121] [2022-11-03 01:57:00,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:00,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:57:01,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:01,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586565121] [2022-11-03 01:57:01,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586565121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:57:01,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143284374] [2022-11-03 01:57:01,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:01,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:01,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:01,068 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:01,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:57:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:01,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:57:01,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:01,334 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:57:01,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:01,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143284374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:01,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:57:01,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-11-03 01:57:01,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513580989] [2022-11-03 01:57:01,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:01,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:57:01,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:01,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:57:01,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:01,336 INFO L87 Difference]: Start difference. First operand 10026 states and 15085 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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) [2022-11-03 01:57:02,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:02,178 INFO L93 Difference]: Finished difference Result 29875 states and 45654 transitions. [2022-11-03 01:57:02,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:57:02,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 129 [2022-11-03 01:57:02,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:02,274 INFO L225 Difference]: With dead ends: 29875 [2022-11-03 01:57:02,274 INFO L226 Difference]: Without dead ends: 19854 [2022-11-03 01:57:02,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:02,310 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 243 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:02,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 465 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:57:02,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19854 states. [2022-11-03 01:57:03,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19854 to 19786. [2022-11-03 01:57:03,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19786 states, 16707 states have (on average 1.4979948524570539) internal successors, (25027), 16773 states have internal predecessors, (25027), 2310 states have call successors, (2310), 769 states have call predecessors, (2310), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2022-11-03 01:57:03,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19786 states to 19786 states and 29645 transitions. [2022-11-03 01:57:03,579 INFO L78 Accepts]: Start accepts. Automaton has 19786 states and 29645 transitions. Word has length 129 [2022-11-03 01:57:03,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:03,580 INFO L495 AbstractCegarLoop]: Abstraction has 19786 states and 29645 transitions. [2022-11-03 01:57:03,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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) [2022-11-03 01:57:03,580 INFO L276 IsEmpty]: Start isEmpty. Operand 19786 states and 29645 transitions. [2022-11-03 01:57:03,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 01:57:03,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:03,614 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:03,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:03,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660b89d1-627a-4e23-9689-bd4484a67936/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:03,839 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:03,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:03,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1799036950, now seen corresponding path program 1 times [2022-11-03 01:57:03,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:03,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511626589] [2022-11-03 01:57:03,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:03,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 01:57:04,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:04,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511626589] [2022-11-03 01:57:04,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511626589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:04,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:04,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:04,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657887160] [2022-11-03 01:57:04,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:04,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:04,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:04,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:04,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:04,587 INFO L87 Difference]: Start difference. First operand 19786 states and 29645 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:57:06,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:06,942 INFO L93 Difference]: Finished difference Result 53874 states and 80851 transitions. [2022-11-03 01:57:06,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:57:06,943 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 129 [2022-11-03 01:57:06,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:07,103 INFO L225 Difference]: With dead ends: 53874 [2022-11-03 01:57:07,103 INFO L226 Difference]: Without dead ends: 34094 [2022-11-03 01:57:07,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:57:07,162 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 852 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:07,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 981 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:57:07,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34094 states. [2022-11-03 01:57:09,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34094 to 29418. [2022-11-03 01:57:09,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29418 states, 24835 states have (on average 1.4934970807328367) internal successors, (37091), 24933 states have internal predecessors, (37091), 3430 states have call successors, (3430), 1153 states have call predecessors, (3430), 1152 states have return successors, (3428), 3332 states have call predecessors, (3428), 3428 states have call successors, (3428) [2022-11-03 01:57:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29418 states to 29418 states and 43949 transitions. [2022-11-03 01:57:09,224 INFO L78 Accepts]: Start accepts. Automaton has 29418 states and 43949 transitions. Word has length 129 [2022-11-03 01:57:09,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:09,225 INFO L495 AbstractCegarLoop]: Abstraction has 29418 states and 43949 transitions. [2022-11-03 01:57:09,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:57:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 29418 states and 43949 transitions. [2022-11-03 01:57:09,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 01:57:09,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:09,269 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:09,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 01:57:09,269 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:09,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:09,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1130149504, now seen corresponding path program 1 times [2022-11-03 01:57:09,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:09,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019991216] [2022-11-03 01:57:09,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:09,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 01:57:10,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:10,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019991216] [2022-11-03 01:57:10,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019991216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:10,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:10,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:10,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831985349] [2022-11-03 01:57:10,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:10,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:10,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:10,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:10,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:10,024 INFO L87 Difference]: Start difference. First operand 29418 states and 43949 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:57:13,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:13,651 INFO L93 Difference]: Finished difference Result 98226 states and 147156 transitions. [2022-11-03 01:57:13,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:57:13,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2022-11-03 01:57:13,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:13,999 INFO L225 Difference]: With dead ends: 98226 [2022-11-03 01:57:14,000 INFO L226 Difference]: Without dead ends: 68814 [2022-11-03 01:57:14,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:57:14,087 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 947 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:14,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [967 Valid, 683 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:57:14,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68814 states. [2022-11-03 01:57:17,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68814 to 57674. [2022-11-03 01:57:17,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57674 states, 48707 states have (on average 1.4874863982589772) internal successors, (72451), 48901 states have internal predecessors, (72451), 6662 states have call successors, (6662), 2305 states have call predecessors, (6662), 2304 states have return successors, (6660), 6468 states have call predecessors, (6660), 6660 states have call successors, (6660) [2022-11-03 01:57:18,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57674 states to 57674 states and 85773 transitions. [2022-11-03 01:57:18,234 INFO L78 Accepts]: Start accepts. Automaton has 57674 states and 85773 transitions. Word has length 130 [2022-11-03 01:57:18,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:18,235 INFO L495 AbstractCegarLoop]: Abstraction has 57674 states and 85773 transitions. [2022-11-03 01:57:18,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:57:18,235 INFO L276 IsEmpty]: Start isEmpty. Operand 57674 states and 85773 transitions. [2022-11-03 01:57:18,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 01:57:18,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:18,332 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:18,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 01:57:18,332 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:18,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:18,333 INFO L85 PathProgramCache]: Analyzing trace with hash -8422186, now seen corresponding path program 1 times [2022-11-03 01:57:18,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:18,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327290563] [2022-11-03 01:57:18,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:18,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 01:57:18,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:18,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327290563] [2022-11-03 01:57:18,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327290563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:18,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:18,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:18,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381321183] [2022-11-03 01:57:18,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:18,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:18,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:18,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:18,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:18,813 INFO L87 Difference]: Start difference. First operand 57674 states and 85773 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:57:26,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:26,599 INFO L93 Difference]: Finished difference Result 187218 states and 279700 transitions. [2022-11-03 01:57:26,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:57:26,599 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 131 [2022-11-03 01:57:26,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:27,251 INFO L225 Difference]: With dead ends: 187218 [2022-11-03 01:57:27,251 INFO L226 Difference]: Without dead ends: 129550 [2022-11-03 01:57:27,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:57:27,436 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 909 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:27,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [929 Valid, 626 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:57:27,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129550 states. [2022-11-03 01:57:34,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129550 to 113034. [2022-11-03 01:57:34,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113034 states, 95491 states have (on average 1.4812181252683498) internal successors, (141443), 95877 states have internal predecessors, (141443), 12934 states have call successors, (12934), 4609 states have call predecessors, (12934), 4608 states have return successors, (12932), 12548 states have call predecessors, (12932), 12932 states have call successors, (12932) [2022-11-03 01:57:35,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113034 states to 113034 states and 167309 transitions. [2022-11-03 01:57:35,078 INFO L78 Accepts]: Start accepts. Automaton has 113034 states and 167309 transitions. Word has length 131 [2022-11-03 01:57:35,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:35,079 INFO L495 AbstractCegarLoop]: Abstraction has 113034 states and 167309 transitions. [2022-11-03 01:57:35,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:57:35,079 INFO L276 IsEmpty]: Start isEmpty. Operand 113034 states and 167309 transitions. [2022-11-03 01:57:35,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 01:57:35,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:35,226 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:35,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 01:57:35,227 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:35,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:35,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2087633856, now seen corresponding path program 1 times [2022-11-03 01:57:35,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:35,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459674203] [2022-11-03 01:57:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:35,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 01:57:36,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:36,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459674203] [2022-11-03 01:57:36,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459674203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:36,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:36,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:36,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543352859] [2022-11-03 01:57:36,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:36,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:36,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:36,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:36,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:36,214 INFO L87 Difference]: Start difference. First operand 113034 states and 167309 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)