./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.02.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8 --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 a08b839794d511e255b2cbb9b4715d014c32f56d ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:08:44,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:08:44,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:08:44,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:08:44,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:08:44,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:08:44,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:08:44,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:08:44,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:08:44,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:08:44,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:08:44,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:08:44,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:08:44,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:08:44,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:08:44,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:08:44,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:08:44,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:08:44,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:08:44,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:08:44,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:08:44,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:08:44,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:08:44,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:08:44,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:08:44,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:08:44,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:08:44,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:08:44,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:08:44,287 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:08:44,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:08:44,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:08:44,290 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:08:44,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:08:44,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:08:44,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:08:44,294 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:08:44,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:08:44,295 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:08:44,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:08:44,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:08:44,297 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 08:08:44,343 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:08:44,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:08:44,346 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:08:44,346 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:08:44,346 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:08:44,346 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:08:44,347 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:08:44,347 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:08:44,353 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:08:44,354 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:08:44,355 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:08:44,355 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:08:44,356 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:08:44,356 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:08:44,356 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:08:44,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:08:44,357 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:08:44,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:08:44,358 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:08:44,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:08:44,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:08:44,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:08:44,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:08:44,359 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:08:44,359 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:08:44,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:08:44,360 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:08:44,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:08:44,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:08:44,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:08:44,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:08:44,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:08:44,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:08:44,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:08:44,364 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:08:44,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:08:44,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:08:44,365 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:08:44,365 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:08:44,365 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a08b839794d511e255b2cbb9b4715d014c32f56d [2021-10-13 08:08:44,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:08:44,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:08:44,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:08:44,762 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:08:44,763 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:08:44,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/systemc/token_ring.02.cil-2.c [2021-10-13 08:08:44,832 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/data/c9d0f4ba1/db43a44978aa41908ca696a4ade86abf/FLAG9c9479f18 [2021-10-13 08:08:45,387 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:08:45,394 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/sv-benchmarks/c/systemc/token_ring.02.cil-2.c [2021-10-13 08:08:45,415 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/data/c9d0f4ba1/db43a44978aa41908ca696a4ade86abf/FLAG9c9479f18 [2021-10-13 08:08:45,682 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/data/c9d0f4ba1/db43a44978aa41908ca696a4ade86abf [2021-10-13 08:08:45,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:08:45,690 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:08:45,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:08:45,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:08:45,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:08:45,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:45" (1/1) ... [2021-10-13 08:08:45,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b82a634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:45, skipping insertion in model container [2021-10-13 08:08:45,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:45" (1/1) ... [2021-10-13 08:08:45,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:08:45,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:08:45,978 WARN L228 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_ab711d7d-34aa-4800-a055-ea9ae7f430a9/sv-benchmarks/c/systemc/token_ring.02.cil-2.c[366,379] [2021-10-13 08:08:46,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:08:46,047 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:08:46,058 WARN L228 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_ab711d7d-34aa-4800-a055-ea9ae7f430a9/sv-benchmarks/c/systemc/token_ring.02.cil-2.c[366,379] [2021-10-13 08:08:46,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:08:46,111 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:08:46,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:46 WrapperNode [2021-10-13 08:08:46,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:08:46,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:08:46,113 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:08:46,113 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:08:46,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:46" (1/1) ... [2021-10-13 08:08:46,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:46" (1/1) ... [2021-10-13 08:08:46,174 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:08:46,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:08:46,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:08:46,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:08:46,184 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:46" (1/1) ... [2021-10-13 08:08:46,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:46" (1/1) ... [2021-10-13 08:08:46,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:46" (1/1) ... [2021-10-13 08:08:46,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:46" (1/1) ... [2021-10-13 08:08:46,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:46" (1/1) ... [2021-10-13 08:08:46,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:46" (1/1) ... [2021-10-13 08:08:46,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:46" (1/1) ... [2021-10-13 08:08:46,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:08:46,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:08:46,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:08:46,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:08:46,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:46" (1/1) ... [2021-10-13 08:08:46,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:08:46,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:08:46,330 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:08:46,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:08:46,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:08:46,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 08:08:46,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:08:46,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:08:48,243 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:08:48,244 INFO L299 CfgBuilder]: Removed 105 assume(true) statements. [2021-10-13 08:08:48,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:48 BoogieIcfgContainer [2021-10-13 08:08:48,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:08:48,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:08:48,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:08:48,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:08:48,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:08:45" (1/3) ... [2021-10-13 08:08:48,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f997e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:48, skipping insertion in model container [2021-10-13 08:08:48,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:46" (2/3) ... [2021-10-13 08:08:48,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f997e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:48, skipping insertion in model container [2021-10-13 08:08:48,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:48" (3/3) ... [2021-10-13 08:08:48,255 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-2.c [2021-10-13 08:08:48,260 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:08:48,261 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-13 08:08:48,309 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:08:48,315 INFO L339 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, mConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 08:08:48,316 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-13 08:08:48,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 102 states have (on average 1.588235294117647) internal successors, (162), 104 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:48,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 08:08:48,337 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:48,337 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:48,339 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:48,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:48,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1754336666, now seen corresponding path program 1 times [2021-10-13 08:08:48,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:48,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231653655] [2021-10-13 08:08:48,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:48,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:48,617 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:48,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231653655] [2021-10-13 08:08:48,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231653655] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:48,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:48,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:08:48,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146925824] [2021-10-13 08:08:48,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:08:48,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:48,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:08:48,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:48,655 INFO L87 Difference]: Start difference. First operand has 105 states, 102 states have (on average 1.588235294117647) internal successors, (162), 104 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:48,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:48,808 INFO L93 Difference]: Finished difference Result 285 states and 438 transitions. [2021-10-13 08:08:48,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:08:48,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 08:08:48,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:48,832 INFO L225 Difference]: With dead ends: 285 [2021-10-13 08:08:48,832 INFO L226 Difference]: Without dead ends: 178 [2021-10-13 08:08:48,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:48,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-13 08:08:48,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 168. [2021-10-13 08:08:48,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 167 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:48,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 246 transitions. [2021-10-13 08:08:48,890 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 246 transitions. Word has length 19 [2021-10-13 08:08:48,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:48,891 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 246 transitions. [2021-10-13 08:08:48,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:48,892 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 246 transitions. [2021-10-13 08:08:48,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 08:08:48,894 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:48,895 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-13 08:08:48,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 08:08:48,895 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:48,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:48,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1002973536, now seen corresponding path program 1 times [2021-10-13 08:08:48,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:48,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743216401] [2021-10-13 08:08:48,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:48,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 08:08:48,962 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:48,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743216401] [2021-10-13 08:08:48,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743216401] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:48,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:48,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:08:48,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078989143] [2021-10-13 08:08:48,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:08:48,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:48,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:08:48,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:48,966 INFO L87 Difference]: Start difference. First operand 168 states and 246 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:49,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:49,131 INFO L93 Difference]: Finished difference Result 529 states and 768 transitions. [2021-10-13 08:08:49,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:08:49,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-13 08:08:49,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:49,143 INFO L225 Difference]: With dead ends: 529 [2021-10-13 08:08:49,143 INFO L226 Difference]: Without dead ends: 366 [2021-10-13 08:08:49,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:08:49,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-10-13 08:08:49,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 287. [2021-10-13 08:08:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 285 states have (on average 1.449122807017544) internal successors, (413), 286 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:49,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 413 transitions. [2021-10-13 08:08:49,219 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 413 transitions. Word has length 36 [2021-10-13 08:08:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:49,219 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 413 transitions. [2021-10-13 08:08:49,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:49,221 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 413 transitions. [2021-10-13 08:08:49,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 08:08:49,228 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:49,229 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-13 08:08:49,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 08:08:49,230 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:49,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:49,231 INFO L82 PathProgramCache]: Analyzing trace with hash -83998913, now seen corresponding path program 1 times [2021-10-13 08:08:49,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:49,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332427818] [2021-10-13 08:08:49,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:49,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:49,419 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:49,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332427818] [2021-10-13 08:08:49,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332427818] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:49,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:49,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:08:49,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315956194] [2021-10-13 08:08:49,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:08:49,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:49,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:08:49,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:49,423 INFO L87 Difference]: Start difference. First operand 287 states and 413 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:49,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:49,596 INFO L93 Difference]: Finished difference Result 901 states and 1285 transitions. [2021-10-13 08:08:49,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:08:49,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-13 08:08:49,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:49,602 INFO L225 Difference]: With dead ends: 901 [2021-10-13 08:08:49,602 INFO L226 Difference]: Without dead ends: 622 [2021-10-13 08:08:49,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:08:49,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-10-13 08:08:49,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 498. [2021-10-13 08:08:49,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 496 states have (on average 1.4193548387096775) internal successors, (704), 497 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:49,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 704 transitions. [2021-10-13 08:08:49,655 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 704 transitions. Word has length 36 [2021-10-13 08:08:49,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:49,656 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 704 transitions. [2021-10-13 08:08:49,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:49,656 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 704 transitions. [2021-10-13 08:08:49,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 08:08:49,665 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:49,665 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-13 08:08:49,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 08:08:49,666 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:49,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:49,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1363323648, now seen corresponding path program 1 times [2021-10-13 08:08:49,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:49,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814723540] [2021-10-13 08:08:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:49,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:49,771 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:49,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814723540] [2021-10-13 08:08:49,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814723540] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:49,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:49,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:08:49,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334295572] [2021-10-13 08:08:49,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:08:49,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:49,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:08:49,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:49,774 INFO L87 Difference]: Start difference. First operand 498 states and 704 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:49,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:49,852 INFO L93 Difference]: Finished difference Result 872 states and 1264 transitions. [2021-10-13 08:08:49,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:08:49,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-13 08:08:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:49,857 INFO L225 Difference]: With dead ends: 872 [2021-10-13 08:08:49,857 INFO L226 Difference]: Without dead ends: 582 [2021-10-13 08:08:49,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:49,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-10-13 08:08:49,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 546. [2021-10-13 08:08:49,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 544 states have (on average 1.4411764705882353) internal successors, (784), 545 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:49,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 784 transitions. [2021-10-13 08:08:49,891 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 784 transitions. Word has length 36 [2021-10-13 08:08:49,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:49,891 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 784 transitions. [2021-10-13 08:08:49,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:49,893 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 784 transitions. [2021-10-13 08:08:49,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-13 08:08:49,895 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:49,896 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-10-13 08:08:49,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 08:08:49,896 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:49,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:49,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1444285568, now seen corresponding path program 1 times [2021-10-13 08:08:49,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:49,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915064108] [2021-10-13 08:08:49,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:49,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:50,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:08:50,035 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:50,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915064108] [2021-10-13 08:08:50,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915064108] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:50,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:50,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:08:50,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708394464] [2021-10-13 08:08:50,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:08:50,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:50,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:08:50,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:50,039 INFO L87 Difference]: Start difference. First operand 546 states and 784 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:50,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:50,200 INFO L93 Difference]: Finished difference Result 1878 states and 2714 transitions. [2021-10-13 08:08:50,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:08:50,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-10-13 08:08:50,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:50,211 INFO L225 Difference]: With dead ends: 1878 [2021-10-13 08:08:50,211 INFO L226 Difference]: Without dead ends: 1342 [2021-10-13 08:08:50,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:50,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-10-13 08:08:50,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 992. [2021-10-13 08:08:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 990 states have (on average 1.4262626262626263) internal successors, (1412), 991 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:50,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1412 transitions. [2021-10-13 08:08:50,327 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1412 transitions. Word has length 52 [2021-10-13 08:08:50,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:50,330 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1412 transitions. [2021-10-13 08:08:50,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:50,330 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1412 transitions. [2021-10-13 08:08:50,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-13 08:08:50,334 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:50,334 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-10-13 08:08:50,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 08:08:50,335 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:50,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:50,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1996877279, now seen corresponding path program 1 times [2021-10-13 08:08:50,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:50,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288551171] [2021-10-13 08:08:50,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:50,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:50,483 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:50,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288551171] [2021-10-13 08:08:50,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288551171] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:50,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:50,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 08:08:50,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91805969] [2021-10-13 08:08:50,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:08:50,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:50,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:08:50,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:08:50,487 INFO L87 Difference]: Start difference. First operand 992 states and 1412 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:50,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:50,817 INFO L93 Difference]: Finished difference Result 2544 states and 3622 transitions. [2021-10-13 08:08:50,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 08:08:50,818 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-10-13 08:08:50,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:50,831 INFO L225 Difference]: With dead ends: 2544 [2021-10-13 08:08:50,831 INFO L226 Difference]: Without dead ends: 1562 [2021-10-13 08:08:50,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-13 08:08:50,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2021-10-13 08:08:50,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1170. [2021-10-13 08:08:50,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1168 states have (on average 1.4349315068493151) internal successors, (1676), 1169 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:50,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1676 transitions. [2021-10-13 08:08:50,928 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1676 transitions. Word has length 53 [2021-10-13 08:08:50,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:50,929 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 1676 transitions. [2021-10-13 08:08:50,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:50,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1676 transitions. [2021-10-13 08:08:50,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-13 08:08:50,934 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:50,934 INFO L512 BasicCegarLoop]: trace histogram [3, 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, 1] [2021-10-13 08:08:50,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 08:08:50,935 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:50,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:50,936 INFO L82 PathProgramCache]: Analyzing trace with hash 836349728, now seen corresponding path program 1 times [2021-10-13 08:08:50,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:50,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650400198] [2021-10-13 08:08:50,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:50,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:51,048 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:51,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650400198] [2021-10-13 08:08:51,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650400198] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:51,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:51,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:08:51,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473782668] [2021-10-13 08:08:51,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:08:51,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:51,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:08:51,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:51,051 INFO L87 Difference]: Start difference. First operand 1170 states and 1676 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:51,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:51,161 INFO L93 Difference]: Finished difference Result 1979 states and 2849 transitions. [2021-10-13 08:08:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:08:51,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-10-13 08:08:51,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:51,172 INFO L225 Difference]: With dead ends: 1979 [2021-10-13 08:08:51,172 INFO L226 Difference]: Without dead ends: 1242 [2021-10-13 08:08:51,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:51,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-10-13 08:08:51,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1170. [2021-10-13 08:08:51,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1168 states have (on average 1.3955479452054795) internal successors, (1630), 1169 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:51,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1630 transitions. [2021-10-13 08:08:51,270 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1630 transitions. Word has length 54 [2021-10-13 08:08:51,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:51,271 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 1630 transitions. [2021-10-13 08:08:51,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:51,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1630 transitions. [2021-10-13 08:08:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-13 08:08:51,274 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:51,275 INFO L512 BasicCegarLoop]: trace histogram [3, 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, 1] [2021-10-13 08:08:51,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 08:08:51,275 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:51,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:51,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1809838687, now seen corresponding path program 1 times [2021-10-13 08:08:51,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:51,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890935722] [2021-10-13 08:08:51,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:51,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:51,337 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:51,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890935722] [2021-10-13 08:08:51,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890935722] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:51,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:51,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 08:08:51,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404371770] [2021-10-13 08:08:51,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:08:51,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:51,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:08:51,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:08:51,339 INFO L87 Difference]: Start difference. First operand 1170 states and 1630 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:51,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:51,533 INFO L93 Difference]: Finished difference Result 2540 states and 3552 transitions. [2021-10-13 08:08:51,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 08:08:51,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-10-13 08:08:51,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:51,543 INFO L225 Difference]: With dead ends: 2540 [2021-10-13 08:08:51,543 INFO L226 Difference]: Without dead ends: 1380 [2021-10-13 08:08:51,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:08:51,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-10-13 08:08:51,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1227. [2021-10-13 08:08:51,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1225 states have (on average 1.3885714285714286) internal successors, (1701), 1226 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:51,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1701 transitions. [2021-10-13 08:08:51,655 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1701 transitions. Word has length 54 [2021-10-13 08:08:51,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:51,655 INFO L470 AbstractCegarLoop]: Abstraction has 1227 states and 1701 transitions. [2021-10-13 08:08:51,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:51,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1701 transitions. [2021-10-13 08:08:51,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-13 08:08:51,659 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:51,659 INFO L512 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1] [2021-10-13 08:08:51,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 08:08:51,659 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:51,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:51,660 INFO L82 PathProgramCache]: Analyzing trace with hash 2009564879, now seen corresponding path program 1 times [2021-10-13 08:08:51,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:51,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529984160] [2021-10-13 08:08:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:51,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:51,707 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:51,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529984160] [2021-10-13 08:08:51,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529984160] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:51,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:51,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:08:51,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400978653] [2021-10-13 08:08:51,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:08:51,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:51,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:08:51,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:51,710 INFO L87 Difference]: Start difference. First operand 1227 states and 1701 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:51,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:51,795 INFO L93 Difference]: Finished difference Result 2023 states and 2810 transitions. [2021-10-13 08:08:51,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:08:51,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-10-13 08:08:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:51,802 INFO L225 Difference]: With dead ends: 2023 [2021-10-13 08:08:51,802 INFO L226 Difference]: Without dead ends: 807 [2021-10-13 08:08:51,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:51,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-10-13 08:08:51,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 794. [2021-10-13 08:08:51,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 792 states have (on average 1.3345959595959596) internal successors, (1057), 793 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:51,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1057 transitions. [2021-10-13 08:08:51,865 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1057 transitions. Word has length 58 [2021-10-13 08:08:51,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:51,866 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 1057 transitions. [2021-10-13 08:08:51,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:51,866 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1057 transitions. [2021-10-13 08:08:51,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-13 08:08:51,868 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:51,869 INFO L512 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1] [2021-10-13 08:08:51,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 08:08:51,869 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:51,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:51,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1214978738, now seen corresponding path program 1 times [2021-10-13 08:08:51,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:51,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986465334] [2021-10-13 08:08:51,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:51,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:51,963 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:51,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986465334] [2021-10-13 08:08:51,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986465334] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:51,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:51,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 08:08:51,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126919175] [2021-10-13 08:08:51,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:08:51,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:51,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:08:51,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:08:51,968 INFO L87 Difference]: Start difference. First operand 794 states and 1057 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:52,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:52,168 INFO L93 Difference]: Finished difference Result 1672 states and 2214 transitions. [2021-10-13 08:08:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:08:52,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-10-13 08:08:52,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:52,175 INFO L225 Difference]: With dead ends: 1672 [2021-10-13 08:08:52,176 INFO L226 Difference]: Without dead ends: 926 [2021-10-13 08:08:52,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:08:52,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-10-13 08:08:52,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 794. [2021-10-13 08:08:52,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 792 states have (on average 1.3181818181818181) internal successors, (1044), 793 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:52,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1044 transitions. [2021-10-13 08:08:52,240 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1044 transitions. Word has length 58 [2021-10-13 08:08:52,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:52,240 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 1044 transitions. [2021-10-13 08:08:52,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:52,241 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1044 transitions. [2021-10-13 08:08:52,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-13 08:08:52,244 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:52,244 INFO L512 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1] [2021-10-13 08:08:52,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 08:08:52,245 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:52,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:52,245 INFO L82 PathProgramCache]: Analyzing trace with hash -74627027, now seen corresponding path program 1 times [2021-10-13 08:08:52,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:52,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973281644] [2021-10-13 08:08:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:52,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:52,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:52,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973281644] [2021-10-13 08:08:52,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973281644] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:52,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:52,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:08:52,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099310254] [2021-10-13 08:08:52,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:08:52,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:52,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:08:52,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:52,293 INFO L87 Difference]: Start difference. First operand 794 states and 1044 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:52,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:52,370 INFO L93 Difference]: Finished difference Result 1363 states and 1798 transitions. [2021-10-13 08:08:52,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:08:52,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-10-13 08:08:52,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:52,376 INFO L225 Difference]: With dead ends: 1363 [2021-10-13 08:08:52,376 INFO L226 Difference]: Without dead ends: 617 [2021-10-13 08:08:52,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:52,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-10-13 08:08:52,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 605. [2021-10-13 08:08:52,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 603 states have (on average 1.2769485903814262) internal successors, (770), 604 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 770 transitions. [2021-10-13 08:08:52,427 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 770 transitions. Word has length 58 [2021-10-13 08:08:52,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:52,428 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 770 transitions. [2021-10-13 08:08:52,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 770 transitions. [2021-10-13 08:08:52,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-13 08:08:52,430 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:52,430 INFO L512 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:52,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 08:08:52,431 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:52,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:52,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1893341921, now seen corresponding path program 1 times [2021-10-13 08:08:52,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:52,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776807627] [2021-10-13 08:08:52,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:52,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:52,643 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:52,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776807627] [2021-10-13 08:08:52,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776807627] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:08:52,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456987845] [2021-10-13 08:08:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:52,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:08:52,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:08:52,646 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:08:52,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:08:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:52,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 08:08:52,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:53,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:53,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456987845] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 08:08:53,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-13 08:08:53,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 6] total 14 [2021-10-13 08:08:53,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214990415] [2021-10-13 08:08:53,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:08:53,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:53,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:08:53,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-10-13 08:08:53,828 INFO L87 Difference]: Start difference. First operand 605 states and 770 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:53,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:53,940 INFO L93 Difference]: Finished difference Result 1173 states and 1511 transitions. [2021-10-13 08:08:53,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:08:53,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-10-13 08:08:53,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:53,947 INFO L225 Difference]: With dead ends: 1173 [2021-10-13 08:08:53,947 INFO L226 Difference]: Without dead ends: 795 [2021-10-13 08:08:53,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-10-13 08:08:53,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-10-13 08:08:54,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 670. [2021-10-13 08:08:54,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 668 states have (on average 1.2649700598802396) internal successors, (845), 669 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:54,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 845 transitions. [2021-10-13 08:08:54,013 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 845 transitions. Word has length 59 [2021-10-13 08:08:54,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:54,013 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 845 transitions. [2021-10-13 08:08:54,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:54,013 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 845 transitions. [2021-10-13 08:08:54,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-13 08:08:54,015 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:54,016 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-10-13 08:08:54,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:54,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:08:54,241 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:54,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:54,241 INFO L82 PathProgramCache]: Analyzing trace with hash 351847116, now seen corresponding path program 1 times [2021-10-13 08:08:54,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:54,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924270452] [2021-10-13 08:08:54,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:54,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:54,300 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:54,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924270452] [2021-10-13 08:08:54,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924270452] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:08:54,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811652454] [2021-10-13 08:08:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:54,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:08:54,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:08:54,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:08:54,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 08:08:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:54,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:08:54,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:54,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:54,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811652454] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:54,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 08:08:54,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-10-13 08:08:54,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399720043] [2021-10-13 08:08:54,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:08:54,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:54,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:08:54,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:08:54,793 INFO L87 Difference]: Start difference. First operand 670 states and 845 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:54,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:54,884 INFO L93 Difference]: Finished difference Result 1335 states and 1686 transitions. [2021-10-13 08:08:54,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:08:54,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-10-13 08:08:54,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:54,890 INFO L225 Difference]: With dead ends: 1335 [2021-10-13 08:08:54,890 INFO L226 Difference]: Without dead ends: 788 [2021-10-13 08:08:54,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:08:54,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-10-13 08:08:54,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 675. [2021-10-13 08:08:54,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 673 states have (on average 1.2719167904903417) internal successors, (856), 674 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:54,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 856 transitions. [2021-10-13 08:08:54,948 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 856 transitions. Word has length 59 [2021-10-13 08:08:54,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:54,948 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 856 transitions. [2021-10-13 08:08:54,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:54,949 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 856 transitions. [2021-10-13 08:08:54,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-13 08:08:54,950 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:54,951 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-10-13 08:08:54,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:55,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-13 08:08:55,165 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:55,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:55,165 INFO L82 PathProgramCache]: Analyzing trace with hash -306429559, now seen corresponding path program 1 times [2021-10-13 08:08:55,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:55,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726099424] [2021-10-13 08:08:55,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:55,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:55,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 08:08:55,200 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:55,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726099424] [2021-10-13 08:08:55,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726099424] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:55,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:55,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:08:55,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429833675] [2021-10-13 08:08:55,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:08:55,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:55,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:08:55,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:55,205 INFO L87 Difference]: Start difference. First operand 675 states and 856 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:55,301 INFO L93 Difference]: Finished difference Result 1546 states and 1961 transitions. [2021-10-13 08:08:55,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:08:55,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-10-13 08:08:55,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:55,307 INFO L225 Difference]: With dead ends: 1546 [2021-10-13 08:08:55,307 INFO L226 Difference]: Without dead ends: 882 [2021-10-13 08:08:55,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-10-13 08:08:55,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 882. [2021-10-13 08:08:55,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 880 states have (on average 1.2386363636363635) internal successors, (1090), 881 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:55,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1090 transitions. [2021-10-13 08:08:55,384 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1090 transitions. Word has length 59 [2021-10-13 08:08:55,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:55,385 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 1090 transitions. [2021-10-13 08:08:55,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:55,385 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1090 transitions. [2021-10-13 08:08:55,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-13 08:08:55,387 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:55,388 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-10-13 08:08:55,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-13 08:08:55,388 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:55,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:55,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1250762718, now seen corresponding path program 1 times [2021-10-13 08:08:55,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:55,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343067017] [2021-10-13 08:08:55,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:55,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 08:08:55,475 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:55,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343067017] [2021-10-13 08:08:55,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343067017] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:55,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:55,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:08:55,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651456153] [2021-10-13 08:08:55,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:08:55,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:55,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:08:55,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:55,481 INFO L87 Difference]: Start difference. First operand 882 states and 1090 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:55,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:55,619 INFO L93 Difference]: Finished difference Result 1797 states and 2223 transitions. [2021-10-13 08:08:55,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:08:55,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-10-13 08:08:55,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:55,627 INFO L225 Difference]: With dead ends: 1797 [2021-10-13 08:08:55,627 INFO L226 Difference]: Without dead ends: 1081 [2021-10-13 08:08:55,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:55,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-10-13 08:08:55,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 882. [2021-10-13 08:08:55,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 880 states have (on average 1.2193181818181817) internal successors, (1073), 881 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:55,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1073 transitions. [2021-10-13 08:08:55,714 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1073 transitions. Word has length 60 [2021-10-13 08:08:55,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:55,714 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 1073 transitions. [2021-10-13 08:08:55,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:55,715 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1073 transitions. [2021-10-13 08:08:55,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-13 08:08:55,716 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:55,717 INFO L512 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:55,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-13 08:08:55,717 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:55,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:55,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1906842549, now seen corresponding path program 1 times [2021-10-13 08:08:55,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:55,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180752346] [2021-10-13 08:08:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:55,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:08:55,776 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:55,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180752346] [2021-10-13 08:08:55,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180752346] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:55,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:55,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 08:08:55,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728369091] [2021-10-13 08:08:55,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:08:55,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:55,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:08:55,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:55,778 INFO L87 Difference]: Start difference. First operand 882 states and 1073 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:55,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:55,924 INFO L93 Difference]: Finished difference Result 1611 states and 1958 transitions. [2021-10-13 08:08:55,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:08:55,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-10-13 08:08:55,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:55,931 INFO L225 Difference]: With dead ends: 1611 [2021-10-13 08:08:55,931 INFO L226 Difference]: Without dead ends: 959 [2021-10-13 08:08:55,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:55,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-10-13 08:08:56,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 832. [2021-10-13 08:08:56,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 830 states have (on average 1.1927710843373494) internal successors, (990), 831 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:56,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 990 transitions. [2021-10-13 08:08:56,011 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 990 transitions. Word has length 60 [2021-10-13 08:08:56,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:56,011 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 990 transitions. [2021-10-13 08:08:56,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:56,012 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 990 transitions. [2021-10-13 08:08:56,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-13 08:08:56,014 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:56,014 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-10-13 08:08:56,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-13 08:08:56,015 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:56,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:56,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1301190324, now seen corresponding path program 1 times [2021-10-13 08:08:56,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:56,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031307672] [2021-10-13 08:08:56,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:56,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:56,069 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:56,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031307672] [2021-10-13 08:08:56,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031307672] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:56,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:56,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 08:08:56,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956274423] [2021-10-13 08:08:56,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:08:56,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:56,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:08:56,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:56,072 INFO L87 Difference]: Start difference. First operand 832 states and 990 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:56,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:56,245 INFO L93 Difference]: Finished difference Result 1899 states and 2240 transitions. [2021-10-13 08:08:56,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:08:56,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-10-13 08:08:56,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:56,253 INFO L225 Difference]: With dead ends: 1899 [2021-10-13 08:08:56,253 INFO L226 Difference]: Without dead ends: 1182 [2021-10-13 08:08:56,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:56,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2021-10-13 08:08:56,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 980. [2021-10-13 08:08:56,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 978 states have (on average 1.1687116564417177) internal successors, (1143), 979 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:56,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1143 transitions. [2021-10-13 08:08:56,342 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1143 transitions. Word has length 62 [2021-10-13 08:08:56,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:56,343 INFO L470 AbstractCegarLoop]: Abstraction has 980 states and 1143 transitions. [2021-10-13 08:08:56,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:56,343 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1143 transitions. [2021-10-13 08:08:56,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-13 08:08:56,345 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:56,346 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:56,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-13 08:08:56,346 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:56,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:56,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1071877186, now seen corresponding path program 1 times [2021-10-13 08:08:56,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:56,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123194072] [2021-10-13 08:08:56,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:56,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 08:08:56,480 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:56,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123194072] [2021-10-13 08:08:56,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123194072] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:56,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:56,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 08:08:56,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498516647] [2021-10-13 08:08:56,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:08:56,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:56,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:08:56,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:08:56,485 INFO L87 Difference]: Start difference. First operand 980 states and 1143 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:56,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:56,759 INFO L93 Difference]: Finished difference Result 3260 states and 3799 transitions. [2021-10-13 08:08:56,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:08:56,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-10-13 08:08:56,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:56,778 INFO L225 Difference]: With dead ends: 3260 [2021-10-13 08:08:56,779 INFO L226 Difference]: Without dead ends: 2605 [2021-10-13 08:08:56,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:08:56,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-10-13 08:08:56,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1871. [2021-10-13 08:08:56,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1869 states have (on average 1.169609416800428) internal successors, (2186), 1870 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:56,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2186 transitions. [2021-10-13 08:08:56,977 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2186 transitions. Word has length 79 [2021-10-13 08:08:56,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:56,978 INFO L470 AbstractCegarLoop]: Abstraction has 1871 states and 2186 transitions. [2021-10-13 08:08:56,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:56,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2186 transitions. [2021-10-13 08:08:56,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-13 08:08:56,981 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:56,981 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:56,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-13 08:08:56,982 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:56,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:56,983 INFO L82 PathProgramCache]: Analyzing trace with hash -254785937, now seen corresponding path program 1 times [2021-10-13 08:08:56,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:56,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51847140] [2021-10-13 08:08:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:56,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:57,128 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:57,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51847140] [2021-10-13 08:08:57,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51847140] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:08:57,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661338475] [2021-10-13 08:08:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:57,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:08:57,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:08:57,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:08:57,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 08:08:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:57,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 08:08:57,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 08:08:57,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 08:08:58,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661338475] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:58,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 08:08:58,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 5] imperfect sequences [7] total 12 [2021-10-13 08:08:58,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893792255] [2021-10-13 08:08:58,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:08:58,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:58,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:08:58,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-13 08:08:58,579 INFO L87 Difference]: Start difference. First operand 1871 states and 2186 transitions. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:58,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:58,830 INFO L93 Difference]: Finished difference Result 3811 states and 4445 transitions. [2021-10-13 08:08:58,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:08:58,831 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-10-13 08:08:58,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:58,843 INFO L225 Difference]: With dead ends: 3811 [2021-10-13 08:08:58,843 INFO L226 Difference]: Without dead ends: 2084 [2021-10-13 08:08:58,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-10-13 08:08:58,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2021-10-13 08:08:59,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1604. [2021-10-13 08:08:59,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1602 states have (on average 1.1591760299625469) internal successors, (1857), 1603 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:59,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 1857 transitions. [2021-10-13 08:08:59,023 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 1857 transitions. Word has length 80 [2021-10-13 08:08:59,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:59,023 INFO L470 AbstractCegarLoop]: Abstraction has 1604 states and 1857 transitions. [2021-10-13 08:08:59,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:59,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 1857 transitions. [2021-10-13 08:08:59,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-13 08:08:59,031 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:59,031 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:59,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:59,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:08:59,249 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:08:59,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:59,249 INFO L82 PathProgramCache]: Analyzing trace with hash -66422993, now seen corresponding path program 1 times [2021-10-13 08:08:59,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:59,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216287839] [2021-10-13 08:08:59,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:59,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 08:08:59,277 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 08:08:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 08:08:59,352 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-13 08:08:59,353 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 08:08:59,354 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:08:59,356 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:08:59,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-13 08:08:59,364 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:08:59,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:08:59 BoogieIcfgContainer [2021-10-13 08:08:59,490 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:08:59,491 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:08:59,491 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:08:59,491 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:08:59,492 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:48" (3/4) ... [2021-10-13 08:08:59,494 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 08:08:59,600 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 08:08:59,600 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:08:59,602 INFO L168 Benchmark]: Toolchain (without parser) took 13910.44 ms. Allocated memory was 104.9 MB in the beginning and 264.2 MB in the end (delta: 159.4 MB). Free memory was 62.0 MB in the beginning and 147.3 MB in the end (delta: -85.4 MB). Peak memory consumption was 73.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:59,602 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 104.9 MB. Free memory was 78.5 MB in the beginning and 78.4 MB in the end (delta: 55.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:08:59,603 INFO L168 Benchmark]: CACSL2BoogieTranslator took 416.46 ms. Allocated memory is still 104.9 MB. Free memory was 61.7 MB in the beginning and 75.1 MB in the end (delta: -13.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:59,603 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.64 ms. Allocated memory is still 104.9 MB. Free memory was 75.1 MB in the beginning and 71.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:59,603 INFO L168 Benchmark]: Boogie Preprocessor took 83.38 ms. Allocated memory is still 104.9 MB. Free memory was 71.9 MB in the beginning and 69.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:59,604 INFO L168 Benchmark]: RCFGBuilder took 1987.69 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 69.3 MB in the beginning and 57.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 43.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:59,604 INFO L168 Benchmark]: TraceAbstraction took 11242.02 ms. Allocated memory was 125.8 MB in the beginning and 264.2 MB in the end (delta: 138.4 MB). Free memory was 56.6 MB in the beginning and 162.0 MB in the end (delta: -105.4 MB). Peak memory consumption was 32.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:59,605 INFO L168 Benchmark]: Witness Printer took 109.22 ms. Allocated memory is still 264.2 MB. Free memory was 162.0 MB in the beginning and 147.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:59,607 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 104.9 MB. Free memory was 78.5 MB in the beginning and 78.4 MB in the end (delta: 55.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 416.46 ms. Allocated memory is still 104.9 MB. Free memory was 61.7 MB in the beginning and 75.1 MB in the end (delta: -13.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 61.64 ms. Allocated memory is still 104.9 MB. Free memory was 75.1 MB in the beginning and 71.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 83.38 ms. Allocated memory is still 104.9 MB. Free memory was 71.9 MB in the beginning and 69.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1987.69 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 69.3 MB in the beginning and 57.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 43.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11242.02 ms. Allocated memory was 125.8 MB in the beginning and 264.2 MB in the end (delta: 138.4 MB). Free memory was 56.6 MB in the beginning and 162.0 MB in the end (delta: -105.4 MB). Peak memory consumption was 32.4 MB. Max. memory is 16.1 GB. * Witness Printer took 109.22 ms. Allocated memory is still 264.2 MB. Free memory was 162.0 MB in the beginning and 147.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int m_pc = 0; [L17] int t1_pc = 0; [L18] int t2_pc = 0; [L19] int m_st ; [L20] int t1_st ; [L21] int t2_st ; [L22] int m_i ; [L23] int t1_i ; [L24] int t2_i ; [L25] int M_E = 2; [L26] int T1_E = 2; [L27] int T2_E = 2; [L28] int E_M = 2; [L29] int E_1 = 2; [L30] int E_2 = 2; [L35] int token ; [L37] int local ; [L602] int __retres1 ; [L516] m_i = 1 [L517] t1_i = 1 [L518] t2_i = 1 [L543] int kernel_st ; [L544] int tmp ; [L545] int tmp___0 ; [L549] kernel_st = 0 [L235] COND TRUE m_i == 1 [L236] m_st = 0 [L240] COND TRUE t1_i == 1 [L241] t1_st = 0 [L245] COND TRUE t2_i == 1 [L246] t2_st = 0 [L348] COND FALSE !(M_E == 0) [L353] COND FALSE !(T1_E == 0) [L358] COND FALSE !(T2_E == 0) [L363] COND FALSE !(E_M == 0) [L368] COND FALSE !(E_1 == 0) [L373] COND FALSE !(E_2 == 0) [L421] int tmp ; [L422] int tmp___0 ; [L423] int tmp___1 ; [L167] int __retres1 ; VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L170] COND FALSE !(m_pc == 1) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L180] __retres1 = 0 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L182] return (__retres1); [L427] tmp = is_master_triggered() [L429] COND FALSE !(\read(tmp)) [L186] int __retres1 ; VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L189] COND FALSE !(t1_pc == 1) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L199] __retres1 = 0 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L201] return (__retres1); [L435] tmp___0 = is_transmit1_triggered() [L437] COND FALSE !(\read(tmp___0)) [L205] int __retres1 ; VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L208] COND FALSE !(t2_pc == 1) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L218] __retres1 = 0 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L220] return (__retres1); [L443] tmp___1 = is_transmit2_triggered() [L445] COND FALSE !(\read(tmp___1)) [L386] COND FALSE !(M_E == 1) [L391] COND FALSE !(T1_E == 1) [L396] COND FALSE !(T2_E == 1) [L401] COND FALSE !(E_M == 1) [L406] COND FALSE !(E_1 == 1) [L411] COND FALSE !(E_2 == 1) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L557] COND TRUE 1 [L560] kernel_st = 1 [L281] int tmp ; VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L285] COND TRUE 1 [L255] int __retres1 ; [L258] COND TRUE m_st == 0 [L259] __retres1 = 1 [L276] return (__retres1); [L288] tmp = exists_runnable_thread() [L290] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L295] COND TRUE m_st == 0 [L296] int tmp_ndt_1; [L297] tmp_ndt_1 = __VERIFIER_nondet_int() [L298] COND FALSE !(\read(tmp_ndt_1)) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L309] COND TRUE t1_st == 0 [L310] int tmp_ndt_2; [L311] tmp_ndt_2 = __VERIFIER_nondet_int() [L312] COND TRUE \read(tmp_ndt_2) [L314] t1_st = 1 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=1, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L98] COND TRUE t1_pc == 0 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=1, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L109] COND TRUE 1 [L111] t1_pc = 1 [L112] t1_st = 2 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L323] COND TRUE t2_st == 0 [L324] int tmp_ndt_3; [L325] tmp_ndt_3 = __VERIFIER_nondet_int() [L326] COND TRUE \read(tmp_ndt_3) [L328] t2_st = 1 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=0, t2_st=1, token=0] [L134] COND TRUE t2_pc == 0 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=0, t2_st=1, token=0] [L145] COND TRUE 1 [L147] t2_pc = 1 [L148] t2_st = 2 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L285] COND TRUE 1 [L255] int __retres1 ; [L258] COND TRUE m_st == 0 [L259] __retres1 = 1 [L276] return (__retres1); [L288] tmp = exists_runnable_thread() [L290] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L295] COND TRUE m_st == 0 [L296] int tmp_ndt_1; [L297] tmp_ndt_1 = __VERIFIER_nondet_int() [L298] COND TRUE \read(tmp_ndt_1) [L300] m_st = 1 [L40] int tmp_var = __VERIFIER_nondet_int(); [L42] COND TRUE m_pc == 0 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L53] COND TRUE 1 [L56] token = __VERIFIER_nondet_int() [L57] local = token [L58] E_1 = 1 [L421] int tmp ; [L422] int tmp___0 ; [L423] int tmp___1 ; [L167] int __retres1 ; VAL [E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L170] COND FALSE !(m_pc == 1) VAL [E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L180] __retres1 = 0 VAL [E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L182] return (__retres1); [L427] tmp = is_master_triggered() [L429] COND FALSE !(\read(tmp)) [L186] int __retres1 ; VAL [E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L189] COND TRUE t1_pc == 1 VAL [E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L190] COND TRUE E_1 == 1 [L191] __retres1 = 1 VAL [E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L201] return (__retres1); [L435] tmp___0 = is_transmit1_triggered() [L437] COND TRUE \read(tmp___0) [L438] t1_st = 0 [L205] int __retres1 ; VAL [E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L208] COND TRUE t2_pc == 1 VAL [E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L209] COND FALSE !(E_2 == 1) VAL [E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L218] __retres1 = 0 VAL [E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L220] return (__retres1); [L443] tmp___1 = is_transmit2_triggered() [L445] COND FALSE !(\read(tmp___1)) [L60] E_1 = 2 [L61] m_pc = 1 [L62] m_st = 2 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L309] COND TRUE t1_st == 0 [L310] int tmp_ndt_2; [L311] tmp_ndt_2 = __VERIFIER_nondet_int() [L312] COND TRUE \read(tmp_ndt_2) [L314] t1_st = 1 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L98] COND FALSE !(t1_pc == 0) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L101] COND TRUE t1_pc == 1 [L117] token += 1 [L118] E_2 = 1 [L421] int tmp ; [L422] int tmp___0 ; [L423] int tmp___1 ; [L167] int __retres1 ; VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L170] COND TRUE m_pc == 1 VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L171] COND FALSE !(E_M == 1) VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L180] __retres1 = 0 VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L182] return (__retres1); [L427] tmp = is_master_triggered() [L429] COND FALSE !(\read(tmp)) [L186] int __retres1 ; VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L189] COND TRUE t1_pc == 1 VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L190] COND FALSE !(E_1 == 1) VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L199] __retres1 = 0 VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L201] return (__retres1); [L435] tmp___0 = is_transmit1_triggered() [L437] COND FALSE !(\read(tmp___0)) [L205] int __retres1 ; VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L208] COND TRUE t2_pc == 1 VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L209] COND TRUE E_2 == 1 [L210] __retres1 = 1 VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L220] return (__retres1); [L443] tmp___1 = is_transmit2_triggered() [L445] COND TRUE \read(tmp___1) [L446] t2_st = 0 [L120] E_2 = 2 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, token=1] [L109] COND TRUE 1 [L111] t1_pc = 1 [L112] t1_st = 2 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, token=1] [L323] COND TRUE t2_st == 0 [L324] int tmp_ndt_3; [L325] tmp_ndt_3 = __VERIFIER_nondet_int() [L326] COND TRUE \read(tmp_ndt_3) [L328] t2_st = 1 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=1] [L134] COND FALSE !(t2_pc == 0) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=1] [L137] COND TRUE t2_pc == 1 [L153] token += 1 [L154] E_M = 1 [L421] int tmp ; [L422] int tmp___0 ; [L423] int tmp___1 ; [L167] int __retres1 ; VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L170] COND TRUE m_pc == 1 VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L171] COND TRUE E_M == 1 [L172] __retres1 = 1 VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L182] return (__retres1); [L427] tmp = is_master_triggered() [L429] COND TRUE \read(tmp) [L430] m_st = 0 [L186] int __retres1 ; VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L189] COND TRUE t1_pc == 1 VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L190] COND FALSE !(E_1 == 1) VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L199] __retres1 = 0 VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L201] return (__retres1); [L435] tmp___0 = is_transmit1_triggered() [L437] COND FALSE !(\read(tmp___0)) [L205] int __retres1 ; VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L208] COND TRUE t2_pc == 1 VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L209] COND FALSE !(E_2 == 1) VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L218] __retres1 = 0 VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L220] return (__retres1); [L443] tmp___1 = is_transmit2_triggered() [L445] COND FALSE !(\read(tmp___1)) [L156] E_M = 2 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L145] COND TRUE 1 [L147] t2_pc = 1 [L148] t2_st = 2 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L285] COND TRUE 1 [L255] int __retres1 ; [L258] COND TRUE m_st == 0 [L259] __retres1 = 1 [L276] return (__retres1); [L288] tmp = exists_runnable_thread() [L290] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L295] COND TRUE m_st == 0 [L296] int tmp_ndt_1; [L297] tmp_ndt_1 = __VERIFIER_nondet_int() [L298] COND TRUE \read(tmp_ndt_1) [L300] m_st = 1 [L40] int tmp_var = __VERIFIER_nondet_int(); [L42] COND FALSE !(m_pc == 0) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L45] COND TRUE m_pc == 1 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L67] COND FALSE !(token != local + 2) [L72] COND TRUE tmp_var <= 5 [L73] COND TRUE tmp_var >= 5 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L78] COND TRUE tmp_var <= 5 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L79] COND TRUE tmp_var >= 5 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L80] COND TRUE tmp_var == 5 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L12] reach_error() VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 105 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 11053.9ms, OverallIterations: 20, TraceHistogramMax: 4, EmptinessCheckTime: 68.3ms, AutomataDifference: 3289.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3222 SDtfs, 3809 SDslu, 3900 SDs, 0 SdLazy, 765 SolverSat, 207 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 901.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 503 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 457.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1871occurred in iteration=18, InterpolantAutomatonStates: 86, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1586.1ms AutomataMinimizationTime, 19 MinimizatonAttempts, 3353 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 168.6ms SsaConstructionTime, 617.6ms SatisfiabilityAnalysisTime, 3821.0ms InterpolantComputationTime, 1312 NumberOfCodeBlocks, 1312 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 1403 ConstructedInterpolants, 0 QuantifiedInterpolants, 4238 SizeOfPredicates, 6 NumberOfNonLiveVariables, 973 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 25 InterpolantComputations, 21 PerfectInterpolantSequences, 300/321 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 08:08:59,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab711d7d-34aa-4800-a055-ea9ae7f430a9/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...