./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label42.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label42.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs --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 ca099a0a865236295bec7881986648360a2333c3 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:58:58,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:58:58,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:58:58,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:58:58,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:58:58,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:58:58,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:58:58,187 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:58:58,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:58:58,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:58:58,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:58:58,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:58:58,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:58:58,206 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:58:58,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:58:58,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:58:58,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:58:58,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:58:58,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:58:58,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:58:58,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:58:58,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:58:58,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:58:58,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:58:58,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:58:58,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:58:58,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:58:58,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:58:58,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:58:58,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:58:58,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:58:58,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:58:58,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:58:58,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:58:58,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:58:58,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:58:58,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:58:58,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:58:58,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:58:58,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:58:58,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:58:58,262 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:58:58,312 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:58:58,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:58:58,314 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:58:58,314 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:58:58,315 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:58:58,315 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:58:58,315 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:58:58,315 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:58:58,316 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:58:58,316 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:58:58,317 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:58:58,317 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:58:58,318 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:58:58,318 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:58:58,318 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:58:58,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:58:58,319 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:58:58,319 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:58:58,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:58:58,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:58:58,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:58:58,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:58:58,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:58:58,321 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:58:58,321 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:58:58,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:58:58,321 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:58:58,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:58:58,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:58:58,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:58:58,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:58:58,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:58:58,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:58:58,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:58:58,325 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:58:58,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:58:58,325 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:58:58,326 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:58:58,326 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:58:58,326 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_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca099a0a865236295bec7881986648360a2333c3 [2021-10-16 02:58:58,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:58:58,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:58:58,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:58:58,669 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:58:58,670 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:58:58,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/eca-rers2012/Problem01_label42.c [2021-10-16 02:58:58,750 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs/data/9aff9aa08/40172be09b36444b9a34b4090f47d863/FLAG8bce31606 [2021-10-16 02:58:59,423 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:58:59,424 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/sv-benchmarks/c/eca-rers2012/Problem01_label42.c [2021-10-16 02:58:59,442 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs/data/9aff9aa08/40172be09b36444b9a34b4090f47d863/FLAG8bce31606 [2021-10-16 02:58:59,629 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs/data/9aff9aa08/40172be09b36444b9a34b4090f47d863 [2021-10-16 02:58:59,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:58:59,633 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:58:59,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:58:59,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:58:59,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:58:59,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:58:59" (1/1) ... [2021-10-16 02:58:59,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d2cb3c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:59, skipping insertion in model container [2021-10-16 02:58:59,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:58:59" (1/1) ... [2021-10-16 02:58:59,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:58:59,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:59:00,119 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_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/sv-benchmarks/c/eca-rers2012/Problem01_label42.c[19849,19862] [2021-10-16 02:59:00,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:59:00,170 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:59:00,272 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_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/sv-benchmarks/c/eca-rers2012/Problem01_label42.c[19849,19862] [2021-10-16 02:59:00,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:59:00,297 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:59:00,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:00 WrapperNode [2021-10-16 02:59:00,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:59:00,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:59:00,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:59:00,300 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:59:00,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:00" (1/1) ... [2021-10-16 02:59:00,328 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:00" (1/1) ... [2021-10-16 02:59:00,394 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:59:00,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:59:00,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:59:00,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:59:00,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:00" (1/1) ... [2021-10-16 02:59:00,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:00" (1/1) ... [2021-10-16 02:59:00,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:00" (1/1) ... [2021-10-16 02:59:00,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:00" (1/1) ... [2021-10-16 02:59:00,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:00" (1/1) ... [2021-10-16 02:59:00,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:00" (1/1) ... [2021-10-16 02:59:00,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:00" (1/1) ... [2021-10-16 02:59:00,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:59:00,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:59:00,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:59:00,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:59:00,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:00" (1/1) ... [2021-10-16 02:59:00,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:59:00,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:59:00,571 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:59:00,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:59:00,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:59:00,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:59:00,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:59:00,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:59:02,514 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:59:02,515 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 02:59:02,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:59:02 BoogieIcfgContainer [2021-10-16 02:59:02,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:59:02,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:59:02,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:59:02,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:59:02,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:58:59" (1/3) ... [2021-10-16 02:59:02,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb54fa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:59:02, skipping insertion in model container [2021-10-16 02:59:02,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:00" (2/3) ... [2021-10-16 02:59:02,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb54fa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:59:02, skipping insertion in model container [2021-10-16 02:59:02,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:59:02" (3/3) ... [2021-10-16 02:59:02,528 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label42.c [2021-10-16 02:59:02,534 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:59:02,534 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:59:02,596 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:59:02,604 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 [2021-10-16 02:59:02,605 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:59:02,624 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 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) [2021-10-16 02:59:02,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-16 02:59:02,635 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:59:02,636 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:59:02,636 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:59:02,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:59:02,643 INFO L82 PathProgramCache]: Analyzing trace with hash 379025799, now seen corresponding path program 1 times [2021-10-16 02:59:02,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:59:02,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990191469] [2021-10-16 02:59:02,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:59:02,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:59:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:59:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:59:03,135 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:59:03,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990191469] [2021-10-16 02:59:03,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990191469] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:59:03,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:59:03,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:59:03,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744434267] [2021-10-16 02:59:03,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:59:03,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:59:03,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:59:03,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:59:03,161 INFO L87 Difference]: Start difference. First operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 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 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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) [2021-10-16 02:59:03,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:59:03,538 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2021-10-16 02:59:03,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:59:03,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 71 [2021-10-16 02:59:03,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:59:03,552 INFO L225 Difference]: With dead ends: 224 [2021-10-16 02:59:03,552 INFO L226 Difference]: Without dead ends: 145 [2021-10-16 02:59:03,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:59:03,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-16 02:59:03,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-16 02:59:03,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.7569444444444444) internal successors, (253), 144 states have internal predecessors, (253), 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) [2021-10-16 02:59:03,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 253 transitions. [2021-10-16 02:59:03,603 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 253 transitions. Word has length 71 [2021-10-16 02:59:03,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:59:03,605 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 253 transitions. [2021-10-16 02:59:03,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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) [2021-10-16 02:59:03,605 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 253 transitions. [2021-10-16 02:59:03,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-16 02:59:03,609 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:59:03,609 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:59:03,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:59:03,610 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:59:03,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:59:03,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1189482561, now seen corresponding path program 1 times [2021-10-16 02:59:03,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:59:03,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705983668] [2021-10-16 02:59:03,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:59:03,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:59:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:59:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:59:03,723 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:59:03,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705983668] [2021-10-16 02:59:03,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705983668] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:59:03,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:59:03,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:59:03,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574964487] [2021-10-16 02:59:03,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:59:03,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:59:03,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:59:03,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:59:03,727 INFO L87 Difference]: Start difference. First operand 145 states and 253 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2021-10-16 02:59:04,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:59:04,104 INFO L93 Difference]: Finished difference Result 431 states and 756 transitions. [2021-10-16 02:59:04,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:59:04,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 75 [2021-10-16 02:59:04,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:59:04,108 INFO L225 Difference]: With dead ends: 431 [2021-10-16 02:59:04,109 INFO L226 Difference]: Without dead ends: 287 [2021-10-16 02:59:04,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:59:04,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-16 02:59:04,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-10-16 02:59:04,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.632867132867133) internal successors, (467), 286 states have internal predecessors, (467), 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) [2021-10-16 02:59:04,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 467 transitions. [2021-10-16 02:59:04,130 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 467 transitions. Word has length 75 [2021-10-16 02:59:04,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:59:04,131 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 467 transitions. [2021-10-16 02:59:04,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2021-10-16 02:59:04,131 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 467 transitions. [2021-10-16 02:59:04,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-16 02:59:04,137 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:59:04,137 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:59:04,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:59:04,138 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:59:04,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:59:04,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1933825291, now seen corresponding path program 1 times [2021-10-16 02:59:04,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:59:04,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834369272] [2021-10-16 02:59:04,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:59:04,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:59:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:59:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 02:59:04,286 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:59:04,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834369272] [2021-10-16 02:59:04,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834369272] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:59:04,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:59:04,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:59:04,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589503758] [2021-10-16 02:59:04,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:59:04,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:59:04,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:59:04,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:59:04,298 INFO L87 Difference]: Start difference. First operand 287 states and 467 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2021-10-16 02:59:04,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:59:04,632 INFO L93 Difference]: Finished difference Result 715 states and 1184 transitions. [2021-10-16 02:59:04,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:59:04,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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 105 [2021-10-16 02:59:04,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:59:04,637 INFO L225 Difference]: With dead ends: 715 [2021-10-16 02:59:04,637 INFO L226 Difference]: Without dead ends: 429 [2021-10-16 02:59:04,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:59:04,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-10-16 02:59:04,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 358. [2021-10-16 02:59:04,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.6442577030812324) internal successors, (587), 357 states have internal predecessors, (587), 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) [2021-10-16 02:59:04,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 587 transitions. [2021-10-16 02:59:04,674 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 587 transitions. Word has length 105 [2021-10-16 02:59:04,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:59:04,676 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 587 transitions. [2021-10-16 02:59:04,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2021-10-16 02:59:04,677 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 587 transitions. [2021-10-16 02:59:04,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-16 02:59:04,689 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:59:04,690 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:59:04,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:59:04,691 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:59:04,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:59:04,692 INFO L82 PathProgramCache]: Analyzing trace with hash 218746303, now seen corresponding path program 1 times [2021-10-16 02:59:04,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:59:04,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767658388] [2021-10-16 02:59:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:59:04,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:59:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:59:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-16 02:59:04,794 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:59:04,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767658388] [2021-10-16 02:59:04,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767658388] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:59:04,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:59:04,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:59:04,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195813801] [2021-10-16 02:59:04,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:59:04,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:59:04,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:59:04,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:59:04,804 INFO L87 Difference]: Start difference. First operand 358 states and 587 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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) [2021-10-16 02:59:05,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:59:05,116 INFO L93 Difference]: Finished difference Result 715 states and 1173 transitions. [2021-10-16 02:59:05,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:59:05,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 109 [2021-10-16 02:59:05,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:59:05,119 INFO L225 Difference]: With dead ends: 715 [2021-10-16 02:59:05,119 INFO L226 Difference]: Without dead ends: 358 [2021-10-16 02:59:05,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:59:05,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-10-16 02:59:05,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2021-10-16 02:59:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.6274509803921569) internal successors, (581), 357 states have internal predecessors, (581), 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) [2021-10-16 02:59:05,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 581 transitions. [2021-10-16 02:59:05,138 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 581 transitions. Word has length 109 [2021-10-16 02:59:05,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:59:05,138 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 581 transitions. [2021-10-16 02:59:05,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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) [2021-10-16 02:59:05,139 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 581 transitions. [2021-10-16 02:59:05,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-10-16 02:59:05,141 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:59:05,141 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:59:05,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 02:59:05,142 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:59:05,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:59:05,142 INFO L82 PathProgramCache]: Analyzing trace with hash 674879991, now seen corresponding path program 1 times [2021-10-16 02:59:05,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:59:05,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905006961] [2021-10-16 02:59:05,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:59:05,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:59:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:59:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-16 02:59:05,206 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:59:05,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905006961] [2021-10-16 02:59:05,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905006961] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:59:05,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:59:05,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:59:05,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143389449] [2021-10-16 02:59:05,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:59:05,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:59:05,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:59:05,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:59:05,209 INFO L87 Difference]: Start difference. First operand 358 states and 581 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2021-10-16 02:59:05,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:59:05,531 INFO L93 Difference]: Finished difference Result 857 states and 1369 transitions. [2021-10-16 02:59:05,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:59:05,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 113 [2021-10-16 02:59:05,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:59:05,536 INFO L225 Difference]: With dead ends: 857 [2021-10-16 02:59:05,536 INFO L226 Difference]: Without dead ends: 500 [2021-10-16 02:59:05,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:59:05,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-10-16 02:59:05,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2021-10-16 02:59:05,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.5210420841683367) internal successors, (759), 499 states have internal predecessors, (759), 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) [2021-10-16 02:59:05,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 759 transitions. [2021-10-16 02:59:05,556 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 759 transitions. Word has length 113 [2021-10-16 02:59:05,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:59:05,557 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 759 transitions. [2021-10-16 02:59:05,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2021-10-16 02:59:05,557 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 759 transitions. [2021-10-16 02:59:05,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-16 02:59:05,560 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:59:05,560 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:59:05,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 02:59:05,561 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:59:05,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:59:05,561 INFO L82 PathProgramCache]: Analyzing trace with hash -692381259, now seen corresponding path program 1 times [2021-10-16 02:59:05,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:59:05,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400520184] [2021-10-16 02:59:05,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:59:05,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:59:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:59:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-16 02:59:05,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:59:05,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400520184] [2021-10-16 02:59:05,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400520184] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:59:05,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:59:05,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:59:05,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79787131] [2021-10-16 02:59:05,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:59:05,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:59:05,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:59:05,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:59:05,616 INFO L87 Difference]: Start difference. First operand 500 states and 759 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2021-10-16 02:59:06,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:59:06,004 INFO L93 Difference]: Finished difference Result 1354 states and 2016 transitions. [2021-10-16 02:59:06,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:59:06,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 122 [2021-10-16 02:59:06,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:59:06,013 INFO L225 Difference]: With dead ends: 1354 [2021-10-16 02:59:06,013 INFO L226 Difference]: Without dead ends: 855 [2021-10-16 02:59:06,015 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 [2021-10-16 02:59:06,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-10-16 02:59:06,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 642. [2021-10-16 02:59:06,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 1.4804992199687987) internal successors, (949), 641 states have internal predecessors, (949), 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) [2021-10-16 02:59:06,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 949 transitions. [2021-10-16 02:59:06,064 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 949 transitions. Word has length 122 [2021-10-16 02:59:06,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:59:06,064 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 949 transitions. [2021-10-16 02:59:06,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2021-10-16 02:59:06,065 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 949 transitions. [2021-10-16 02:59:06,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-10-16 02:59:06,067 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:59:06,067 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-16 02:59:06,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 02:59:06,068 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:59:06,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:59:06,068 INFO L82 PathProgramCache]: Analyzing trace with hash 240375227, now seen corresponding path program 1 times [2021-10-16 02:59:06,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:59:06,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616962897] [2021-10-16 02:59:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:59:06,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:59:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:59:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-16 02:59:06,152 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:59:06,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616962897] [2021-10-16 02:59:06,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616962897] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:59:06,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:59:06,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:59:06,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323164106] [2021-10-16 02:59:06,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:59:06,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:59:06,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:59:06,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:59:06,157 INFO L87 Difference]: Start difference. First operand 642 states and 949 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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) [2021-10-16 02:59:06,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:59:06,454 INFO L93 Difference]: Finished difference Result 1354 states and 2010 transitions. [2021-10-16 02:59:06,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:59:06,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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 138 [2021-10-16 02:59:06,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:59:06,460 INFO L225 Difference]: With dead ends: 1354 [2021-10-16 02:59:06,460 INFO L226 Difference]: Without dead ends: 713 [2021-10-16 02:59:06,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:59:06,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-10-16 02:59:06,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2021-10-16 02:59:06,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.4578651685393258) internal successors, (1038), 712 states have internal predecessors, (1038), 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) [2021-10-16 02:59:06,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1038 transitions. [2021-10-16 02:59:06,486 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1038 transitions. Word has length 138 [2021-10-16 02:59:06,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:59:06,488 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 1038 transitions. [2021-10-16 02:59:06,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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) [2021-10-16 02:59:06,488 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1038 transitions. [2021-10-16 02:59:06,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-10-16 02:59:06,492 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:59:06,492 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:59:06,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-16 02:59:06,493 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:59:06,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:59:06,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1229086309, now seen corresponding path program 1 times [2021-10-16 02:59:06,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:59:06,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678030400] [2021-10-16 02:59:06,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:59:06,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:59:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:59:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-16 02:59:06,605 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:59:06,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678030400] [2021-10-16 02:59:06,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678030400] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:59:06,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:59:06,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:59:06,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899848456] [2021-10-16 02:59:06,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:59:06,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:59:06,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:59:06,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:59:06,608 INFO L87 Difference]: Start difference. First operand 713 states and 1038 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 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) [2021-10-16 02:59:07,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:59:07,109 INFO L93 Difference]: Finished difference Result 1780 states and 2557 transitions. [2021-10-16 02:59:07,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:59:07,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 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 154 [2021-10-16 02:59:07,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:59:07,116 INFO L225 Difference]: With dead ends: 1780 [2021-10-16 02:59:07,116 INFO L226 Difference]: Without dead ends: 997 [2021-10-16 02:59:07,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:59:07,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-16 02:59:07,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 926. [2021-10-16 02:59:07,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.2432432432432432) internal successors, (1150), 925 states have internal predecessors, (1150), 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) [2021-10-16 02:59:07,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1150 transitions. [2021-10-16 02:59:07,144 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1150 transitions. Word has length 154 [2021-10-16 02:59:07,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:59:07,145 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1150 transitions. [2021-10-16 02:59:07,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 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) [2021-10-16 02:59:07,145 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1150 transitions. [2021-10-16 02:59:07,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-10-16 02:59:07,149 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:59:07,149 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-16 02:59:07,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-16 02:59:07,150 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:59:07,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:59:07,150 INFO L82 PathProgramCache]: Analyzing trace with hash -937096071, now seen corresponding path program 1 times [2021-10-16 02:59:07,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:59:07,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666650355] [2021-10-16 02:59:07,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:59:07,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:59:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:59:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-16 02:59:07,254 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:59:07,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666650355] [2021-10-16 02:59:07,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666650355] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:59:07,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:59:07,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:59:07,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527419450] [2021-10-16 02:59:07,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:59:07,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:59:07,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:59:07,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:59:07,257 INFO L87 Difference]: Start difference. First operand 926 states and 1150 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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) [2021-10-16 02:59:07,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:59:07,718 INFO L93 Difference]: Finished difference Result 2064 states and 2553 transitions. [2021-10-16 02:59:07,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:59:07,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 177 [2021-10-16 02:59:07,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:59:07,725 INFO L225 Difference]: With dead ends: 2064 [2021-10-16 02:59:07,726 INFO L226 Difference]: Without dead ends: 1139 [2021-10-16 02:59:07,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:59:07,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-10-16 02:59:07,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 926. [2021-10-16 02:59:07,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.1978378378378378) internal successors, (1108), 925 states have internal predecessors, (1108), 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) [2021-10-16 02:59:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1108 transitions. [2021-10-16 02:59:07,762 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1108 transitions. Word has length 177 [2021-10-16 02:59:07,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:59:07,762 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1108 transitions. [2021-10-16 02:59:07,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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) [2021-10-16 02:59:07,763 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1108 transitions. [2021-10-16 02:59:07,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-10-16 02:59:07,767 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:59:07,767 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-16 02:59:07,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-16 02:59:07,767 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:59:07,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:59:07,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1287881784, now seen corresponding path program 1 times [2021-10-16 02:59:07,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:59:07,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963993528] [2021-10-16 02:59:07,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:59:07,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:59:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:59:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-10-16 02:59:07,840 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:59:07,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963993528] [2021-10-16 02:59:07,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963993528] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:59:07,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:59:07,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:59:07,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290610660] [2021-10-16 02:59:07,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:59:07,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:59:07,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:59:07,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:59:07,844 INFO L87 Difference]: Start difference. First operand 926 states and 1108 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 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) [2021-10-16 02:59:08,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:59:08,291 INFO L93 Difference]: Finished difference Result 1922 states and 2305 transitions. [2021-10-16 02:59:08,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:59:08,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 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 202 [2021-10-16 02:59:08,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:59:08,299 INFO L225 Difference]: With dead ends: 1922 [2021-10-16 02:59:08,299 INFO L226 Difference]: Without dead ends: 997 [2021-10-16 02:59:08,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:59:08,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-16 02:59:08,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2021-10-16 02:59:08,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.180722891566265) internal successors, (1176), 996 states have internal predecessors, (1176), 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) [2021-10-16 02:59:08,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1176 transitions. [2021-10-16 02:59:08,337 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1176 transitions. Word has length 202 [2021-10-16 02:59:08,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:59:08,338 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1176 transitions. [2021-10-16 02:59:08,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 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) [2021-10-16 02:59:08,338 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1176 transitions. [2021-10-16 02:59:08,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-10-16 02:59:08,342 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:59:08,343 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-16 02:59:08,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-16 02:59:08,343 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:59:08,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:59:08,344 INFO L82 PathProgramCache]: Analyzing trace with hash 853603449, now seen corresponding path program 1 times [2021-10-16 02:59:08,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:59:08,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029077233] [2021-10-16 02:59:08,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:59:08,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:59:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:59:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-10-16 02:59:08,475 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:59:08,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029077233] [2021-10-16 02:59:08,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029077233] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:59:08,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:59:08,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:59:08,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432013655] [2021-10-16 02:59:08,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:59:08,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:59:08,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:59:08,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:59:08,478 INFO L87 Difference]: Start difference. First operand 997 states and 1176 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2021-10-16 02:59:08,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:59:08,782 INFO L93 Difference]: Finished difference Result 2206 states and 2605 transitions. [2021-10-16 02:59:08,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:59:08,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 220 [2021-10-16 02:59:08,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:59:08,790 INFO L225 Difference]: With dead ends: 2206 [2021-10-16 02:59:08,790 INFO L226 Difference]: Without dead ends: 1210 [2021-10-16 02:59:08,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:59:08,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-16 02:59:08,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1139. [2021-10-16 02:59:08,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1138 states have (on average 1.1687170474516695) internal successors, (1330), 1138 states have internal predecessors, (1330), 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) [2021-10-16 02:59:08,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1330 transitions. [2021-10-16 02:59:08,829 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1330 transitions. Word has length 220 [2021-10-16 02:59:08,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:59:08,829 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 1330 transitions. [2021-10-16 02:59:08,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2021-10-16 02:59:08,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1330 transitions. [2021-10-16 02:59:08,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-10-16 02:59:08,834 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:59:08,835 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:59:08,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-16 02:59:08,835 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:59:08,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:59:08,836 INFO L82 PathProgramCache]: Analyzing trace with hash 2121153410, now seen corresponding path program 1 times [2021-10-16 02:59:08,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:59:08,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195972487] [2021-10-16 02:59:08,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:59:08,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:59:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:59:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-10-16 02:59:09,001 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:59:09,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195972487] [2021-10-16 02:59:09,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195972487] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:59:09,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:59:09,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:59:09,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157721506] [2021-10-16 02:59:09,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:59:09,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:59:09,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:59:09,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:59:09,010 INFO L87 Difference]: Start difference. First operand 1139 states and 1330 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2021-10-16 02:59:09,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:59:09,305 INFO L93 Difference]: Finished difference Result 2277 states and 2659 transitions. [2021-10-16 02:59:09,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:59:09,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 242 [2021-10-16 02:59:09,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:59:09,314 INFO L225 Difference]: With dead ends: 2277 [2021-10-16 02:59:09,314 INFO L226 Difference]: Without dead ends: 1139 [2021-10-16 02:59:09,316 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 [2021-10-16 02:59:09,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-10-16 02:59:09,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2021-10-16 02:59:09,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1138 states have (on average 1.148506151142355) internal successors, (1307), 1138 states have internal predecessors, (1307), 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) [2021-10-16 02:59:09,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1307 transitions. [2021-10-16 02:59:09,349 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1307 transitions. Word has length 242 [2021-10-16 02:59:09,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:59:09,350 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 1307 transitions. [2021-10-16 02:59:09,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2021-10-16 02:59:09,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1307 transitions. [2021-10-16 02:59:09,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-10-16 02:59:09,355 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:59:09,355 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:59:09,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-16 02:59:09,355 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:59:09,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:59:09,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1886816047, now seen corresponding path program 1 times [2021-10-16 02:59:09,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:59:09,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417583189] [2021-10-16 02:59:09,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:59:09,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:59:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:59:09,692 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 182 proven. 103 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-16 02:59:09,692 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:59:09,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417583189] [2021-10-16 02:59:09,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417583189] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:59:09,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582863601] [2021-10-16 02:59:09,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:59:09,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:59:09,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:59:09,695 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:59:09,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:59:09,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:59:09,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:59:09,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:59:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-16 02:59:10,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:59:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-16 02:59:11,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582863601] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:59:11,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:59:11,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-16 02:59:11,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460628870] [2021-10-16 02:59:11,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:59:11,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:59:11,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:59:11,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:59:11,258 INFO L87 Difference]: Start difference. First operand 1139 states and 1307 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2021-10-16 02:59:11,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:59:11,533 INFO L93 Difference]: Finished difference Result 1352 states and 1536 transitions. [2021-10-16 02:59:11,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:59:11,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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 255 [2021-10-16 02:59:11,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:59:11,534 INFO L225 Difference]: With dead ends: 1352 [2021-10-16 02:59:11,534 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:59:11,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 508 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:59:11,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:59:11,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:59:11,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-10-16 02:59:11,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:59:11,536 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 255 [2021-10-16 02:59:11,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:59:11,537 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:59:11,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2021-10-16 02:59:11,537 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:59:11,537 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:59:11,540 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:59:11,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:59:11,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-16 02:59:11,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 02:59:11,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:59:11,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:59:11,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:59:11,977 INFO L857 garLoopResultBuilder]: For program point L531(line 531) no Hoare annotation was computed. [2021-10-16 02:59:11,977 INFO L857 garLoopResultBuilder]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-10-16 02:59:11,977 INFO L857 garLoopResultBuilder]: For program point L598(line 598) no Hoare annotation was computed. [2021-10-16 02:59:11,978 INFO L857 garLoopResultBuilder]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-10-16 02:59:11,978 INFO L857 garLoopResultBuilder]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-10-16 02:59:11,978 INFO L857 garLoopResultBuilder]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-10-16 02:59:11,978 INFO L857 garLoopResultBuilder]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-10-16 02:59:11,978 INFO L857 garLoopResultBuilder]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-10-16 02:59:11,978 INFO L857 garLoopResultBuilder]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-10-16 02:59:11,978 INFO L857 garLoopResultBuilder]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-10-16 02:59:11,978 INFO L857 garLoopResultBuilder]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-10-16 02:59:11,978 INFO L857 garLoopResultBuilder]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-10-16 02:59:11,979 INFO L857 garLoopResultBuilder]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-10-16 02:59:11,979 INFO L857 garLoopResultBuilder]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-10-16 02:59:11,979 INFO L857 garLoopResultBuilder]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-10-16 02:59:11,979 INFO L857 garLoopResultBuilder]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-10-16 02:59:11,979 INFO L857 garLoopResultBuilder]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-10-16 02:59:11,979 INFO L857 garLoopResultBuilder]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-10-16 02:59:11,979 INFO L857 garLoopResultBuilder]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-10-16 02:59:11,979 INFO L857 garLoopResultBuilder]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-10-16 02:59:11,979 INFO L857 garLoopResultBuilder]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-10-16 02:59:11,980 INFO L857 garLoopResultBuilder]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-10-16 02:59:11,980 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-10-16 02:59:11,980 INFO L857 garLoopResultBuilder]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-10-16 02:59:11,980 INFO L857 garLoopResultBuilder]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-10-16 02:59:11,980 INFO L857 garLoopResultBuilder]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-10-16 02:59:11,980 INFO L857 garLoopResultBuilder]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-10-16 02:59:11,980 INFO L857 garLoopResultBuilder]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-10-16 02:59:11,980 INFO L857 garLoopResultBuilder]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-10-16 02:59:11,980 INFO L857 garLoopResultBuilder]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-10-16 02:59:11,981 INFO L857 garLoopResultBuilder]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-10-16 02:59:11,981 INFO L857 garLoopResultBuilder]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-10-16 02:59:11,981 INFO L857 garLoopResultBuilder]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-10-16 02:59:11,981 INFO L857 garLoopResultBuilder]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-10-16 02:59:11,981 INFO L857 garLoopResultBuilder]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-10-16 02:59:11,981 INFO L857 garLoopResultBuilder]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-10-16 02:59:11,981 INFO L857 garLoopResultBuilder]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-10-16 02:59:11,981 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 02:59:11,981 INFO L857 garLoopResultBuilder]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-10-16 02:59:11,981 INFO L857 garLoopResultBuilder]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-10-16 02:59:11,982 INFO L857 garLoopResultBuilder]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-10-16 02:59:11,982 INFO L853 garLoopResultBuilder]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse0 (= ~a21~0 1)) (.cse1 (<= ~a16~0 4)) (.cse3 (= ~a17~0 1)) (.cse2 (= ~a20~0 1))) (or (and (<= 14 ~a8~0) .cse0 (<= ~a16~0 5)) (and .cse1 .cse2) (and .cse0 (<= 15 ~a8~0)) (and .cse3 .cse1) (and .cse0 .cse1) (and (<= 6 ~a16~0) .cse2) (and .cse3 .cse2))) [2021-10-16 02:59:11,982 INFO L857 garLoopResultBuilder]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-10-16 02:59:11,982 INFO L857 garLoopResultBuilder]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-10-16 02:59:11,982 INFO L857 garLoopResultBuilder]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-10-16 02:59:11,982 INFO L857 garLoopResultBuilder]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-10-16 02:59:11,982 INFO L857 garLoopResultBuilder]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-10-16 02:59:11,983 INFO L857 garLoopResultBuilder]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-10-16 02:59:11,983 INFO L857 garLoopResultBuilder]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-10-16 02:59:11,983 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 02:59:11,983 INFO L857 garLoopResultBuilder]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-10-16 02:59:11,983 INFO L860 garLoopResultBuilder]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-10-16 02:59:11,983 INFO L857 garLoopResultBuilder]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-10-16 02:59:11,983 INFO L857 garLoopResultBuilder]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-10-16 02:59:11,983 INFO L857 garLoopResultBuilder]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-10-16 02:59:11,983 INFO L857 garLoopResultBuilder]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-10-16 02:59:11,984 INFO L857 garLoopResultBuilder]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-10-16 02:59:11,984 INFO L857 garLoopResultBuilder]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-10-16 02:59:11,984 INFO L857 garLoopResultBuilder]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-10-16 02:59:11,984 INFO L857 garLoopResultBuilder]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-10-16 02:59:11,984 INFO L857 garLoopResultBuilder]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-10-16 02:59:11,984 INFO L857 garLoopResultBuilder]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-10-16 02:59:11,984 INFO L857 garLoopResultBuilder]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-10-16 02:59:11,984 INFO L857 garLoopResultBuilder]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-10-16 02:59:11,984 INFO L857 garLoopResultBuilder]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-10-16 02:59:11,985 INFO L853 garLoopResultBuilder]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse0 (= ~a21~0 1)) (.cse1 (<= ~a16~0 4)) (.cse3 (= ~a17~0 1)) (.cse2 (= ~a20~0 1))) (or (and (<= 14 ~a8~0) .cse0 (<= ~a16~0 5)) (and .cse1 .cse2) (and .cse0 (<= 15 ~a8~0)) (and .cse3 .cse1) (and .cse0 .cse1) (and (<= 6 ~a16~0) .cse2) (and .cse3 .cse2))) [2021-10-16 02:59:11,985 INFO L857 garLoopResultBuilder]: For program point L527-1(lines 40 585) no Hoare annotation was computed. [2021-10-16 02:59:11,985 INFO L857 garLoopResultBuilder]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-10-16 02:59:11,985 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 531) no Hoare annotation was computed. [2021-10-16 02:59:11,985 INFO L857 garLoopResultBuilder]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-10-16 02:59:11,985 INFO L857 garLoopResultBuilder]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-10-16 02:59:11,985 INFO L857 garLoopResultBuilder]: For program point L530-1(lines 40 585) no Hoare annotation was computed. [2021-10-16 02:59:11,985 INFO L857 garLoopResultBuilder]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-10-16 02:59:11,985 INFO L857 garLoopResultBuilder]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-10-16 02:59:11,985 INFO L857 garLoopResultBuilder]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-10-16 02:59:11,986 INFO L857 garLoopResultBuilder]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-10-16 02:59:11,991 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:59:12,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:59:12 BoogieIcfgContainer [2021-10-16 02:59:12,017 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:59:12,018 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:59:12,018 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:59:12,018 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:59:12,019 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:59:02" (3/4) ... [2021-10-16 02:59:12,022 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:59:12,059 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 108 nodes and edges [2021-10-16 02:59:12,061 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-10-16 02:59:12,063 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-16 02:59:12,065 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:59:12,248 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:59:12,248 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:59:12,250 INFO L168 Benchmark]: Toolchain (without parser) took 12615.37 ms. Allocated memory was 100.7 MB in the beginning and 257.9 MB in the end (delta: 157.3 MB). Free memory was 58.8 MB in the beginning and 194.8 MB in the end (delta: -136.0 MB). Peak memory consumption was 20.9 MB. Max. memory is 16.1 GB. [2021-10-16 02:59:12,250 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 100.7 MB. Free memory was 76.9 MB in the beginning and 76.9 MB in the end (delta: 63.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:59:12,251 INFO L168 Benchmark]: CACSL2BoogieTranslator took 663.82 ms. Allocated memory is still 100.7 MB. Free memory was 58.6 MB in the beginning and 58.9 MB in the end (delta: -374.3 kB). Peak memory consumption was 6.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:59:12,252 INFO L168 Benchmark]: Boogie Procedure Inliner took 94.93 ms. Allocated memory is still 100.7 MB. Free memory was 58.9 MB in the beginning and 53.1 MB in the end (delta: 5.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:59:12,252 INFO L168 Benchmark]: Boogie Preprocessor took 131.19 ms. Allocated memory is still 100.7 MB. Free memory was 53.1 MB in the beginning and 48.8 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:59:12,253 INFO L168 Benchmark]: RCFGBuilder took 1990.44 ms. Allocated memory was 100.7 MB in the beginning and 136.3 MB in the end (delta: 35.7 MB). Free memory was 48.8 MB in the beginning and 70.0 MB in the end (delta: -21.2 MB). Peak memory consumption was 34.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:59:12,253 INFO L168 Benchmark]: TraceAbstraction took 9496.80 ms. Allocated memory was 136.3 MB in the beginning and 257.9 MB in the end (delta: 121.6 MB). Free memory was 69.2 MB in the beginning and 209.5 MB in the end (delta: -140.2 MB). Peak memory consumption was 116.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:59:12,253 INFO L168 Benchmark]: Witness Printer took 230.35 ms. Allocated memory is still 257.9 MB. Free memory was 209.5 MB in the beginning and 194.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:59:12,256 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 100.7 MB. Free memory was 76.9 MB in the beginning and 76.9 MB in the end (delta: 63.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 663.82 ms. Allocated memory is still 100.7 MB. Free memory was 58.6 MB in the beginning and 58.9 MB in the end (delta: -374.3 kB). Peak memory consumption was 6.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 94.93 ms. Allocated memory is still 100.7 MB. Free memory was 58.9 MB in the beginning and 53.1 MB in the end (delta: 5.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 131.19 ms. Allocated memory is still 100.7 MB. Free memory was 53.1 MB in the beginning and 48.8 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1990.44 ms. Allocated memory was 100.7 MB in the beginning and 136.3 MB in the end (delta: 35.7 MB). Free memory was 48.8 MB in the beginning and 70.0 MB in the end (delta: -21.2 MB). Peak memory consumption was 34.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9496.80 ms. Allocated memory was 136.3 MB in the beginning and 257.9 MB in the end (delta: 121.6 MB). Free memory was 69.2 MB in the beginning and 209.5 MB in the end (delta: -140.2 MB). Peak memory consumption was 116.2 MB. Max. memory is 16.1 GB. * Witness Printer took 230.35 ms. Allocated memory is still 257.9 MB. Free memory was 209.5 MB in the beginning and 194.8 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 - PositiveResult [Line: 531]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9395.8ms, OverallIterations: 13, TraceHistogramMax: 7, EmptinessCheckTime: 67.5ms, AutomataDifference: 4837.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 235.4ms, InitialAbstractionConstructionTime: 15.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 573 SDtfs, 811 SDslu, 61 SDs, 0 SdLazy, 3133 SolverSat, 749 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3362.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 544 GetRequests, 524 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 75.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1139occurred in iteration=11, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 354.5ms AutomataMinimizationTime, 13 MinimizatonAttempts, 639 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 45 NumberOfFragments, 107 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2562 FormulaSimplificationTreeSizeReduction, 76.2ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 82 FormulaSimplificationTreeSizeReductionInter, 150.2ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 168.5ms SsaConstructionTime, 563.5ms SatisfiabilityAnalysisTime, 2613.1ms InterpolantComputationTime, 2238 NumberOfCodeBlocks, 2238 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 2478 ConstructedInterpolants, 0 QuantifiedInterpolants, 6208 SizeOfPredicates, 0 NumberOfNonLiveVariables, 501 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 15 InterpolantComputations, 14 PerfectInterpolantSequences, 2641/2744 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: (((((((14 <= a8 && a21 == 1) && a16 <= 5) || (a16 <= 4 && a20 == 1)) || (a21 == 1 && 15 <= a8)) || (a17 == 1 && a16 <= 4)) || (a21 == 1 && a16 <= 4)) || (6 <= a16 && a20 == 1)) || (a17 == 1 && a20 == 1) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (((((((14 <= a8 && a21 == 1) && a16 <= 5) || (a16 <= 4 && a20 == 1)) || (a21 == 1 && 15 <= a8)) || (a17 == 1 && a16 <= 4)) || (a21 == 1 && a16 <= 4)) || (6 <= a16 && a20 == 1)) || (a17 == 1 && a20 == 1) RESULT: Ultimate proved your program to be correct! [2021-10-16 02:59:12,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b3be06-d416-4ac5-8c94-d2b76c6a4a69/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...