./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label30.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label30.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE --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 a272bf0f73a58d72dfba23a9c902bbeb665b6b76cc21acf92951a09cb8e04c47 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 10:51:15,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:51:15,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:51:15,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:51:15,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:51:15,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:51:15,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:51:15,305 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:51:15,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:51:15,308 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:51:15,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:51:15,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:51:15,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:51:15,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:51:15,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:51:15,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:51:15,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:51:15,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:51:15,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:51:15,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:51:15,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:51:15,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:51:15,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:51:15,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:51:15,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:51:15,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:51:15,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:51:15,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:51:15,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:51:15,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:51:15,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:51:15,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:51:15,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:51:15,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:51:15,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:51:15,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:51:15,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:51:15,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:51:15,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:51:15,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:51:15,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:51:15,356 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 10:51:15,385 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:51:15,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:51:15,387 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:51:15,387 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:51:15,388 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:51:15,388 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:51:15,388 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:51:15,389 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:51:15,389 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:51:15,389 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:51:15,390 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:51:15,390 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:51:15,390 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:51:15,391 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:51:15,391 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:51:15,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:51:15,392 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:51:15,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:51:15,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:51:15,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:51:15,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:51:15,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:51:15,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:51:15,394 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:51:15,394 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:51:15,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:51:15,395 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:51:15,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:51:15,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:51:15,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:51:15,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:51:15,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:51:15,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:51:15,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:51:15,397 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:51:15,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:51:15,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:51:15,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:51:15,398 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:51:15,398 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_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a272bf0f73a58d72dfba23a9c902bbeb665b6b76cc21acf92951a09cb8e04c47 [2021-10-24 10:51:15,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:51:15,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:51:15,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:51:15,671 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:51:15,671 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:51:15,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/eca-rers2012/Problem03_label30.c [2021-10-24 10:51:15,741 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/data/a8c3d0a6d/20b3040d2ee84f129ef4bfb0d64c3d6e/FLAG27cfa4850 [2021-10-24 10:51:16,457 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:51:16,460 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/sv-benchmarks/c/eca-rers2012/Problem03_label30.c [2021-10-24 10:51:16,486 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/data/a8c3d0a6d/20b3040d2ee84f129ef4bfb0d64c3d6e/FLAG27cfa4850 [2021-10-24 10:51:16,604 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/data/a8c3d0a6d/20b3040d2ee84f129ef4bfb0d64c3d6e [2021-10-24 10:51:16,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:51:16,610 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:51:16,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:51:16,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:51:16,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:51:16,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:51:16" (1/1) ... [2021-10-24 10:51:16,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dc99593 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:51:16, skipping insertion in model container [2021-10-24 10:51:16,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:51:16" (1/1) ... [2021-10-24 10:51:16,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:51:16,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:51:17,400 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_1def3d9f-51f4-4125-a766-49297cc1e09e/sv-benchmarks/c/eca-rers2012/Problem03_label30.c[57849,57862] [2021-10-24 10:51:17,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:51:17,438 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:51:17,718 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_1def3d9f-51f4-4125-a766-49297cc1e09e/sv-benchmarks/c/eca-rers2012/Problem03_label30.c[57849,57862] [2021-10-24 10:51:17,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:51:17,757 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:51:17,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:51:17 WrapperNode [2021-10-24 10:51:17,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:51:17,759 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:51:17,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:51:17,760 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:51:17,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:51:17" (1/1) ... [2021-10-24 10:51:17,820 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:51:17" (1/1) ... [2021-10-24 10:51:17,935 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:51:17,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:51:17,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:51:17,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:51:17,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:51:17" (1/1) ... [2021-10-24 10:51:17,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:51:17" (1/1) ... [2021-10-24 10:51:17,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:51:17" (1/1) ... [2021-10-24 10:51:17,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:51:17" (1/1) ... [2021-10-24 10:51:18,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:51:17" (1/1) ... [2021-10-24 10:51:18,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:51:17" (1/1) ... [2021-10-24 10:51:18,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:51:17" (1/1) ... [2021-10-24 10:51:18,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:51:18,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:51:18,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:51:18,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:51:18,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:51:17" (1/1) ... [2021-10-24 10:51:18,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:51:18,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:51:18,127 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:51:18,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:51:18,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 10:51:18,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:51:18,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:51:18,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:51:21,029 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:51:21,029 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-24 10:51:21,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:51:21 BoogieIcfgContainer [2021-10-24 10:51:21,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:51:21,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:51:21,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:51:21,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:51:21,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:51:16" (1/3) ... [2021-10-24 10:51:21,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dbfcd38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:51:21, skipping insertion in model container [2021-10-24 10:51:21,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:51:17" (2/3) ... [2021-10-24 10:51:21,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dbfcd38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:51:21, skipping insertion in model container [2021-10-24 10:51:21,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:51:21" (3/3) ... [2021-10-24 10:51:21,045 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label30.c [2021-10-24 10:51:21,053 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:51:21,054 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 10:51:21,103 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:51:21,110 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-24 10:51:21,110 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 10:51:21,129 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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) [2021-10-24 10:51:21,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-10-24 10:51:21,142 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:51:21,143 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:51:21,143 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:51:21,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:51:21,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1724861448, now seen corresponding path program 1 times [2021-10-24 10:51:21,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:51:21,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588035567] [2021-10-24 10:51:21,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:21,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:51:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:51:21,858 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:51:21,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588035567] [2021-10-24 10:51:21,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588035567] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:51:21,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:51:21,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:51:21,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090584502] [2021-10-24 10:51:21,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:51:21,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:51:21,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:51:21,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:21,906 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2021-10-24 10:51:22,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:51:22,884 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2021-10-24 10:51:22,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:51:22,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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 143 [2021-10-24 10:51:22,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:51:22,910 INFO L225 Difference]: With dead ends: 440 [2021-10-24 10:51:22,910 INFO L226 Difference]: Without dead ends: 289 [2021-10-24 10:51:22,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:22,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-10-24 10:51:22,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2021-10-24 10:51:23,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.5868055555555556) internal successors, (457), 288 states have internal predecessors, (457), 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) [2021-10-24 10:51:23,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 457 transitions. [2021-10-24 10:51:23,003 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 457 transitions. Word has length 143 [2021-10-24 10:51:23,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:51:23,005 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 457 transitions. [2021-10-24 10:51:23,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2021-10-24 10:51:23,005 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 457 transitions. [2021-10-24 10:51:23,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-10-24 10:51:23,009 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:51:23,010 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:51:23,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 10:51:23,010 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:51:23,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:51:23,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1817675671, now seen corresponding path program 1 times [2021-10-24 10:51:23,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:51:23,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604277423] [2021-10-24 10:51:23,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:23,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:51:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:51:23,146 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:51:23,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604277423] [2021-10-24 10:51:23,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604277423] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:51:23,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:51:23,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:51:23,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923479290] [2021-10-24 10:51:23,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:51:23,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:51:23,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:51:23,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:23,151 INFO L87 Difference]: Start difference. First operand 289 states and 457 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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) [2021-10-24 10:51:23,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:51:23,864 INFO L93 Difference]: Finished difference Result 863 states and 1368 transitions. [2021-10-24 10:51:23,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:51:23,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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 151 [2021-10-24 10:51:23,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:51:23,881 INFO L225 Difference]: With dead ends: 863 [2021-10-24 10:51:23,881 INFO L226 Difference]: Without dead ends: 575 [2021-10-24 10:51:23,883 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 [2021-10-24 10:51:23,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-10-24 10:51:23,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2021-10-24 10:51:23,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.548780487804878) internal successors, (889), 574 states have internal predecessors, (889), 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) [2021-10-24 10:51:23,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 889 transitions. [2021-10-24 10:51:23,915 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 889 transitions. Word has length 151 [2021-10-24 10:51:23,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:51:23,915 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 889 transitions. [2021-10-24 10:51:23,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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) [2021-10-24 10:51:23,916 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 889 transitions. [2021-10-24 10:51:23,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-10-24 10:51:23,921 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:51:23,922 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:51:23,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 10:51:23,922 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:51:23,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:51:23,923 INFO L82 PathProgramCache]: Analyzing trace with hash 200501515, now seen corresponding path program 1 times [2021-10-24 10:51:23,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:51:23,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27126154] [2021-10-24 10:51:23,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:23,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:51:23,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-24 10:51:24,035 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:51:24,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27126154] [2021-10-24 10:51:24,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27126154] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:51:24,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:51:24,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:51:24,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653542621] [2021-10-24 10:51:24,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:51:24,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:51:24,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:51:24,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:24,044 INFO L87 Difference]: Start difference. First operand 575 states and 889 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 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) [2021-10-24 10:51:24,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:51:24,759 INFO L93 Difference]: Finished difference Result 1723 states and 2665 transitions. [2021-10-24 10:51:24,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:51:24,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 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 160 [2021-10-24 10:51:24,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:51:24,766 INFO L225 Difference]: With dead ends: 1723 [2021-10-24 10:51:24,767 INFO L226 Difference]: Without dead ends: 1149 [2021-10-24 10:51:24,768 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 [2021-10-24 10:51:24,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-10-24 10:51:24,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1147. [2021-10-24 10:51:24,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.5261780104712042) internal successors, (1749), 1146 states have internal predecessors, (1749), 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) [2021-10-24 10:51:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1749 transitions. [2021-10-24 10:51:24,812 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1749 transitions. Word has length 160 [2021-10-24 10:51:24,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:51:24,812 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1749 transitions. [2021-10-24 10:51:24,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 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) [2021-10-24 10:51:24,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1749 transitions. [2021-10-24 10:51:24,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-10-24 10:51:24,817 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:51:24,818 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:51:24,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-24 10:51:24,818 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:51:24,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:51:24,819 INFO L82 PathProgramCache]: Analyzing trace with hash -801823810, now seen corresponding path program 1 times [2021-10-24 10:51:24,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:51:24,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087929649] [2021-10-24 10:51:24,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:24,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:51:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-24 10:51:24,903 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:51:24,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087929649] [2021-10-24 10:51:24,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087929649] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:51:24,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:51:24,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:51:24,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539610934] [2021-10-24 10:51:24,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:51:24,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:51:24,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:51:24,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:24,907 INFO L87 Difference]: Start difference. First operand 1147 states and 1749 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) [2021-10-24 10:51:25,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:51:25,672 INFO L93 Difference]: Finished difference Result 2865 states and 4566 transitions. [2021-10-24 10:51:25,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:51:25,672 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 163 [2021-10-24 10:51:25,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:51:25,683 INFO L225 Difference]: With dead ends: 2865 [2021-10-24 10:51:25,684 INFO L226 Difference]: Without dead ends: 1719 [2021-10-24 10:51:25,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:25,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2021-10-24 10:51:25,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2021-10-24 10:51:25,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.4371362048894063) internal successors, (2469), 1718 states have internal predecessors, (2469), 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) [2021-10-24 10:51:25,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2469 transitions. [2021-10-24 10:51:25,739 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2469 transitions. Word has length 163 [2021-10-24 10:51:25,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:51:25,740 INFO L470 AbstractCegarLoop]: Abstraction has 1719 states and 2469 transitions. [2021-10-24 10:51:25,740 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) [2021-10-24 10:51:25,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2469 transitions. [2021-10-24 10:51:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-10-24 10:51:25,745 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:51:25,746 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:51:25,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-24 10:51:25,746 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:51:25,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:51:25,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1951306026, now seen corresponding path program 1 times [2021-10-24 10:51:25,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:51:25,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892694958] [2021-10-24 10:51:25,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:25,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:51:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-24 10:51:25,829 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:51:25,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892694958] [2021-10-24 10:51:25,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892694958] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:51:25,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:51:25,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:51:25,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032706253] [2021-10-24 10:51:25,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:51:25,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:51:25,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:51:25,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:25,832 INFO L87 Difference]: Start difference. First operand 1719 states and 2469 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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) [2021-10-24 10:51:26,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:51:26,623 INFO L93 Difference]: Finished difference Result 4009 states and 5812 transitions. [2021-10-24 10:51:26,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:51:26,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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 171 [2021-10-24 10:51:26,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:51:26,638 INFO L225 Difference]: With dead ends: 4009 [2021-10-24 10:51:26,638 INFO L226 Difference]: Without dead ends: 2291 [2021-10-24 10:51:26,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:26,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2021-10-24 10:51:26,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2021-10-24 10:51:26,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.3991266375545852) internal successors, (3204), 2290 states have internal predecessors, (3204), 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) [2021-10-24 10:51:26,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3204 transitions. [2021-10-24 10:51:26,712 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3204 transitions. Word has length 171 [2021-10-24 10:51:26,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:51:26,713 INFO L470 AbstractCegarLoop]: Abstraction has 2291 states and 3204 transitions. [2021-10-24 10:51:26,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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) [2021-10-24 10:51:26,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3204 transitions. [2021-10-24 10:51:26,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-10-24 10:51:26,720 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:51:26,721 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:51:26,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-24 10:51:26,721 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:51:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:51:26,722 INFO L82 PathProgramCache]: Analyzing trace with hash 913291515, now seen corresponding path program 1 times [2021-10-24 10:51:26,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:51:26,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748950990] [2021-10-24 10:51:26,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:26,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:51:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-24 10:51:26,808 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:51:26,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748950990] [2021-10-24 10:51:26,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748950990] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:51:26,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:51:26,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:51:26,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288117717] [2021-10-24 10:51:26,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:51:26,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:51:26,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:51:26,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:26,811 INFO L87 Difference]: Start difference. First operand 2291 states and 3204 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2021-10-24 10:51:27,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:51:27,252 INFO L93 Difference]: Finished difference Result 4581 states and 6407 transitions. [2021-10-24 10:51:27,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:51:27,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 176 [2021-10-24 10:51:27,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:51:27,267 INFO L225 Difference]: With dead ends: 4581 [2021-10-24 10:51:27,267 INFO L226 Difference]: Without dead ends: 2291 [2021-10-24 10:51:27,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:27,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2021-10-24 10:51:27,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2021-10-24 10:51:27,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.3397379912663756) internal successors, (3068), 2290 states have internal predecessors, (3068), 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) [2021-10-24 10:51:27,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3068 transitions. [2021-10-24 10:51:27,341 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3068 transitions. Word has length 176 [2021-10-24 10:51:27,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:51:27,341 INFO L470 AbstractCegarLoop]: Abstraction has 2291 states and 3068 transitions. [2021-10-24 10:51:27,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2021-10-24 10:51:27,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3068 transitions. [2021-10-24 10:51:27,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-10-24 10:51:27,348 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:51:27,348 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:51:27,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-24 10:51:27,349 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:51:27,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:51:27,349 INFO L82 PathProgramCache]: Analyzing trace with hash 172365756, now seen corresponding path program 1 times [2021-10-24 10:51:27,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:51:27,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573518731] [2021-10-24 10:51:27,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:27,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:51:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:51:27,578 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:51:27,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573518731] [2021-10-24 10:51:27,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573518731] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:51:27,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432499767] [2021-10-24 10:51:27,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:27,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:51:27,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:51:27,613 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:51:27,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-24 10:51:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:27,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 10:51:27,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:51:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-24 10:51:28,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:51:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-24 10:51:28,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432499767] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:51:28,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:51:28,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-24 10:51:28,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602325563] [2021-10-24 10:51:28,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:51:28,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:51:28,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:51:28,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:51:28,890 INFO L87 Difference]: Start difference. First operand 2291 states and 3068 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2021-10-24 10:51:29,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:51:29,657 INFO L93 Difference]: Finished difference Result 6869 states and 9201 transitions. [2021-10-24 10:51:29,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:51:29,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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 181 [2021-10-24 10:51:29,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:51:29,686 INFO L225 Difference]: With dead ends: 6869 [2021-10-24 10:51:29,687 INFO L226 Difference]: Without dead ends: 4579 [2021-10-24 10:51:29,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:51:29,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2021-10-24 10:51:29,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 4579. [2021-10-24 10:51:29,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4579 states, 4578 states have (on average 1.273481869812145) internal successors, (5830), 4578 states have internal predecessors, (5830), 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) [2021-10-24 10:51:29,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 5830 transitions. [2021-10-24 10:51:29,867 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 5830 transitions. Word has length 181 [2021-10-24 10:51:29,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:51:29,869 INFO L470 AbstractCegarLoop]: Abstraction has 4579 states and 5830 transitions. [2021-10-24 10:51:29,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2021-10-24 10:51:29,869 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 5830 transitions. [2021-10-24 10:51:29,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-10-24 10:51:29,882 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:51:29,883 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:51:29,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-24 10:51:30,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:51:30,105 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:51:30,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:51:30,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1550693295, now seen corresponding path program 1 times [2021-10-24 10:51:30,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:51:30,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097309170] [2021-10-24 10:51:30,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:30,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:51:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-10-24 10:51:30,307 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:51:30,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097309170] [2021-10-24 10:51:30,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097309170] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:51:30,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:51:30,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:51:30,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104442226] [2021-10-24 10:51:30,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:51:30,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:51:30,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:51:30,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:30,309 INFO L87 Difference]: Start difference. First operand 4579 states and 5830 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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) [2021-10-24 10:51:31,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:51:31,518 INFO L93 Difference]: Finished difference Result 10875 states and 13871 transitions. [2021-10-24 10:51:31,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:51:31,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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 208 [2021-10-24 10:51:31,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:51:31,593 INFO L225 Difference]: With dead ends: 10875 [2021-10-24 10:51:31,597 INFO L226 Difference]: Without dead ends: 6583 [2021-10-24 10:51:31,603 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 [2021-10-24 10:51:31,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2021-10-24 10:51:31,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 6581. [2021-10-24 10:51:31,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6581 states, 6580 states have (on average 1.2709726443768996) internal successors, (8363), 6580 states have internal predecessors, (8363), 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) [2021-10-24 10:51:31,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6581 states to 6581 states and 8363 transitions. [2021-10-24 10:51:31,996 INFO L78 Accepts]: Start accepts. Automaton has 6581 states and 8363 transitions. Word has length 208 [2021-10-24 10:51:31,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:51:31,996 INFO L470 AbstractCegarLoop]: Abstraction has 6581 states and 8363 transitions. [2021-10-24 10:51:31,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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) [2021-10-24 10:51:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 6581 states and 8363 transitions. [2021-10-24 10:51:32,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-10-24 10:51:32,024 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:51:32,024 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:51:32,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-24 10:51:32,027 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:51:32,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:51:32,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1656742470, now seen corresponding path program 1 times [2021-10-24 10:51:32,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:51:32,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923799997] [2021-10-24 10:51:32,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:32,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:51:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:32,372 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:51:32,373 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:51:32,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923799997] [2021-10-24 10:51:32,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923799997] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:51:32,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:51:32,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:51:32,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749730607] [2021-10-24 10:51:32,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:51:32,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:51:32,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:51:32,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:32,382 INFO L87 Difference]: Start difference. First operand 6581 states and 8363 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 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) [2021-10-24 10:51:33,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:51:33,212 INFO L93 Difference]: Finished difference Result 13592 states and 17457 transitions. [2021-10-24 10:51:33,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:51:33,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 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 221 [2021-10-24 10:51:33,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:51:33,276 INFO L225 Difference]: With dead ends: 13592 [2021-10-24 10:51:33,277 INFO L226 Difference]: Without dead ends: 7441 [2021-10-24 10:51:33,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7441 states. [2021-10-24 10:51:33,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7441 to 7439. [2021-10-24 10:51:33,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7439 states, 7438 states have (on average 1.2532938962086582) internal successors, (9322), 7438 states have internal predecessors, (9322), 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) [2021-10-24 10:51:33,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7439 states to 7439 states and 9322 transitions. [2021-10-24 10:51:33,490 INFO L78 Accepts]: Start accepts. Automaton has 7439 states and 9322 transitions. Word has length 221 [2021-10-24 10:51:33,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:51:33,490 INFO L470 AbstractCegarLoop]: Abstraction has 7439 states and 9322 transitions. [2021-10-24 10:51:33,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 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) [2021-10-24 10:51:33,492 INFO L276 IsEmpty]: Start isEmpty. Operand 7439 states and 9322 transitions. [2021-10-24 10:51:33,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-10-24 10:51:33,505 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:51:33,505 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:51:33,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-24 10:51:33,506 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:51:33,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:51:33,506 INFO L82 PathProgramCache]: Analyzing trace with hash -2069609803, now seen corresponding path program 1 times [2021-10-24 10:51:33,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:51:33,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215664211] [2021-10-24 10:51:33,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:33,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:51:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-24 10:51:33,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:51:33,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215664211] [2021-10-24 10:51:33,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215664211] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:51:33,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:51:33,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:51:33,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802255848] [2021-10-24 10:51:33,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:51:33,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:51:33,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:51:33,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:33,649 INFO L87 Difference]: Start difference. First operand 7439 states and 9322 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 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) [2021-10-24 10:51:34,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:51:34,485 INFO L93 Difference]: Finished difference Result 16736 states and 21012 transitions. [2021-10-24 10:51:34,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:51:34,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 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 226 [2021-10-24 10:51:34,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:51:34,504 INFO L225 Difference]: With dead ends: 16736 [2021-10-24 10:51:34,505 INFO L226 Difference]: Without dead ends: 9727 [2021-10-24 10:51:34,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:34,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9727 states. [2021-10-24 10:51:34,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9727 to 9727. [2021-10-24 10:51:34,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9727 states, 9726 states have (on average 1.238535883199671) internal successors, (12046), 9726 states have internal predecessors, (12046), 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) [2021-10-24 10:51:34,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9727 states to 9727 states and 12046 transitions. [2021-10-24 10:51:34,702 INFO L78 Accepts]: Start accepts. Automaton has 9727 states and 12046 transitions. Word has length 226 [2021-10-24 10:51:34,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:51:34,702 INFO L470 AbstractCegarLoop]: Abstraction has 9727 states and 12046 transitions. [2021-10-24 10:51:34,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 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) [2021-10-24 10:51:34,703 INFO L276 IsEmpty]: Start isEmpty. Operand 9727 states and 12046 transitions. [2021-10-24 10:51:34,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-10-24 10:51:34,721 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:51:34,723 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:51:34,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-24 10:51:34,724 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:51:34,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:51:34,724 INFO L82 PathProgramCache]: Analyzing trace with hash -3652720, now seen corresponding path program 1 times [2021-10-24 10:51:34,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:51:34,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547313852] [2021-10-24 10:51:34,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:34,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:51:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-24 10:51:34,873 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:51:34,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547313852] [2021-10-24 10:51:34,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547313852] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:51:34,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:51:34,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:51:34,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844348053] [2021-10-24 10:51:34,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:51:34,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:51:34,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:51:34,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:51:34,876 INFO L87 Difference]: Start difference. First operand 9727 states and 12046 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 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) [2021-10-24 10:51:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:51:35,831 INFO L93 Difference]: Finished difference Result 23314 states and 29195 transitions. [2021-10-24 10:51:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:51:35,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 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 229 [2021-10-24 10:51:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:51:35,857 INFO L225 Difference]: With dead ends: 23314 [2021-10-24 10:51:35,857 INFO L226 Difference]: Without dead ends: 14160 [2021-10-24 10:51:35,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:51:35,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14160 states. [2021-10-24 10:51:36,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14160 to 14160. [2021-10-24 10:51:36,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14160 states, 14159 states have (on average 1.219436400875768) internal successors, (17266), 14159 states have internal predecessors, (17266), 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) [2021-10-24 10:51:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14160 states to 14160 states and 17266 transitions. [2021-10-24 10:51:36,113 INFO L78 Accepts]: Start accepts. Automaton has 14160 states and 17266 transitions. Word has length 229 [2021-10-24 10:51:36,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:51:36,114 INFO L470 AbstractCegarLoop]: Abstraction has 14160 states and 17266 transitions. [2021-10-24 10:51:36,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 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) [2021-10-24 10:51:36,114 INFO L276 IsEmpty]: Start isEmpty. Operand 14160 states and 17266 transitions. [2021-10-24 10:51:36,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-10-24 10:51:36,138 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:51:36,138 INFO L512 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:51:36,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-24 10:51:36,143 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:51:36,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:51:36,144 INFO L82 PathProgramCache]: Analyzing trace with hash -55309012, now seen corresponding path program 1 times [2021-10-24 10:51:36,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:51:36,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358844246] [2021-10-24 10:51:36,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:36,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:51:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-10-24 10:51:36,240 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:51:36,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358844246] [2021-10-24 10:51:36,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358844246] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:51:36,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:51:36,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:51:36,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039254196] [2021-10-24 10:51:36,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:51:36,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:51:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:51:36,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:36,244 INFO L87 Difference]: Start difference. First operand 14160 states and 17266 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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) [2021-10-24 10:51:37,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:51:37,203 INFO L93 Difference]: Finished difference Result 32611 states and 39658 transitions. [2021-10-24 10:51:37,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:51:37,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 [2021-10-24 10:51:37,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:51:37,239 INFO L225 Difference]: With dead ends: 32611 [2021-10-24 10:51:37,240 INFO L226 Difference]: Without dead ends: 18881 [2021-10-24 10:51:37,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:37,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18881 states. [2021-10-24 10:51:37,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18881 to 18879. [2021-10-24 10:51:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18879 states, 18878 states have (on average 1.2016103400783982) internal successors, (22684), 18878 states have internal predecessors, (22684), 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) [2021-10-24 10:51:37,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18879 states to 18879 states and 22684 transitions. [2021-10-24 10:51:37,768 INFO L78 Accepts]: Start accepts. Automaton has 18879 states and 22684 transitions. Word has length 242 [2021-10-24 10:51:37,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:51:37,769 INFO L470 AbstractCegarLoop]: Abstraction has 18879 states and 22684 transitions. [2021-10-24 10:51:37,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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) [2021-10-24 10:51:37,769 INFO L276 IsEmpty]: Start isEmpty. Operand 18879 states and 22684 transitions. [2021-10-24 10:51:37,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-10-24 10:51:37,803 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:51:37,806 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:51:37,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-24 10:51:37,807 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:51:37,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:51:37,808 INFO L82 PathProgramCache]: Analyzing trace with hash 564834018, now seen corresponding path program 1 times [2021-10-24 10:51:37,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:51:37,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112272006] [2021-10-24 10:51:37,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:37,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:51:37,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-10-24 10:51:37,966 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:51:37,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112272006] [2021-10-24 10:51:37,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112272006] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:51:37,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:51:37,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:51:37,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274185898] [2021-10-24 10:51:37,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:51:37,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:51:37,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:51:37,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:51:37,970 INFO L87 Difference]: Start difference. First operand 18879 states and 22684 transitions. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 3 states have internal predecessors, (215), 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) [2021-10-24 10:51:39,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:51:39,283 INFO L93 Difference]: Finished difference Result 40333 states and 48466 transitions. [2021-10-24 10:51:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:51:39,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 3 states have internal predecessors, (215), 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 244 [2021-10-24 10:51:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:51:39,321 INFO L225 Difference]: With dead ends: 40333 [2021-10-24 10:51:39,322 INFO L226 Difference]: Without dead ends: 21169 [2021-10-24 10:51:39,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:51:39,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21169 states. [2021-10-24 10:51:39,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21169 to 20452. [2021-10-24 10:51:39,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20452 states, 20451 states have (on average 1.1491369615177742) internal successors, (23501), 20451 states have internal predecessors, (23501), 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) [2021-10-24 10:51:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20452 states to 20452 states and 23501 transitions. [2021-10-24 10:51:39,725 INFO L78 Accepts]: Start accepts. Automaton has 20452 states and 23501 transitions. Word has length 244 [2021-10-24 10:51:39,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:51:39,726 INFO L470 AbstractCegarLoop]: Abstraction has 20452 states and 23501 transitions. [2021-10-24 10:51:39,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 3 states have internal predecessors, (215), 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) [2021-10-24 10:51:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 20452 states and 23501 transitions. [2021-10-24 10:51:39,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-10-24 10:51:39,772 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:51:39,772 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:51:39,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-24 10:51:39,773 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:51:39,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:51:39,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1828062014, now seen corresponding path program 1 times [2021-10-24 10:51:39,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:51:39,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042706161] [2021-10-24 10:51:39,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:39,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:51:39,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:51:39,969 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:51:39,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042706161] [2021-10-24 10:51:39,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042706161] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:51:39,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:51:39,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:51:39,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85331120] [2021-10-24 10:51:39,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:51:39,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:51:39,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:51:39,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:39,974 INFO L87 Difference]: Start difference. First operand 20452 states and 23501 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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) [2021-10-24 10:51:40,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:51:40,786 INFO L93 Difference]: Finished difference Result 42619 states and 49244 transitions. [2021-10-24 10:51:40,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:51:40,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 245 [2021-10-24 10:51:40,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:51:40,830 INFO L225 Difference]: With dead ends: 42619 [2021-10-24 10:51:40,830 INFO L226 Difference]: Without dead ends: 22883 [2021-10-24 10:51:40,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:40,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22883 states. [2021-10-24 10:51:41,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22883 to 22597. [2021-10-24 10:51:41,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22597 states, 22596 states have (on average 1.1523721012568595) internal successors, (26039), 22596 states have internal predecessors, (26039), 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) [2021-10-24 10:51:41,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22597 states to 22597 states and 26039 transitions. [2021-10-24 10:51:41,384 INFO L78 Accepts]: Start accepts. Automaton has 22597 states and 26039 transitions. Word has length 245 [2021-10-24 10:51:41,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:51:41,385 INFO L470 AbstractCegarLoop]: Abstraction has 22597 states and 26039 transitions. [2021-10-24 10:51:41,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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) [2021-10-24 10:51:41,385 INFO L276 IsEmpty]: Start isEmpty. Operand 22597 states and 26039 transitions. [2021-10-24 10:51:41,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-10-24 10:51:41,405 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:51:41,405 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:51:41,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-24 10:51:41,406 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:51:41,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:51:41,406 INFO L82 PathProgramCache]: Analyzing trace with hash 993130772, now seen corresponding path program 1 times [2021-10-24 10:51:41,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:51:41,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859460089] [2021-10-24 10:51:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:41,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:51:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-10-24 10:51:41,526 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:51:41,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859460089] [2021-10-24 10:51:41,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859460089] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:51:41,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:51:41,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:51:41,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75674484] [2021-10-24 10:51:41,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:51:41,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:51:41,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:51:41,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:41,533 INFO L87 Difference]: Start difference. First operand 22597 states and 26039 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 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) [2021-10-24 10:51:42,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:51:42,440 INFO L93 Difference]: Finished difference Result 45765 states and 53414 transitions. [2021-10-24 10:51:42,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:51:42,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 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 264 [2021-10-24 10:51:42,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:51:42,469 INFO L225 Difference]: With dead ends: 45765 [2021-10-24 10:51:42,470 INFO L226 Difference]: Without dead ends: 23741 [2021-10-24 10:51:42,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:42,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23741 states. [2021-10-24 10:51:42,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23741 to 23455. [2021-10-24 10:51:42,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23455 states, 23454 states have (on average 1.1271424916858532) internal successors, (26436), 23454 states have internal predecessors, (26436), 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) [2021-10-24 10:51:42,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23455 states to 23455 states and 26436 transitions. [2021-10-24 10:51:42,917 INFO L78 Accepts]: Start accepts. Automaton has 23455 states and 26436 transitions. Word has length 264 [2021-10-24 10:51:42,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:51:42,920 INFO L470 AbstractCegarLoop]: Abstraction has 23455 states and 26436 transitions. [2021-10-24 10:51:42,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 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) [2021-10-24 10:51:42,920 INFO L276 IsEmpty]: Start isEmpty. Operand 23455 states and 26436 transitions. [2021-10-24 10:51:42,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-10-24 10:51:42,942 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:51:42,942 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:51:42,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-24 10:51:42,943 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:51:42,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:51:42,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1361995044, now seen corresponding path program 1 times [2021-10-24 10:51:42,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:51:42,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660604113] [2021-10-24 10:51:42,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:42,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:51:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-24 10:51:43,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:51:43,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660604113] [2021-10-24 10:51:43,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660604113] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:51:43,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:51:43,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:51:43,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886281307] [2021-10-24 10:51:43,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:51:43,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:51:43,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:51:43,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:43,204 INFO L87 Difference]: Start difference. First operand 23455 states and 26436 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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) [2021-10-24 10:51:44,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:51:44,075 INFO L93 Difference]: Finished difference Result 44478 states and 50428 transitions. [2021-10-24 10:51:44,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:51:44,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 271 [2021-10-24 10:51:44,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:51:44,110 INFO L225 Difference]: With dead ends: 44478 [2021-10-24 10:51:44,110 INFO L226 Difference]: Without dead ends: 23169 [2021-10-24 10:51:44,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:44,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23169 states. [2021-10-24 10:51:44,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23169 to 23026. [2021-10-24 10:51:44,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23026 states, 23025 states have (on average 1.1323344191096634) internal successors, (26072), 23025 states have internal predecessors, (26072), 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) [2021-10-24 10:51:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23026 states to 23026 states and 26072 transitions. [2021-10-24 10:51:44,664 INFO L78 Accepts]: Start accepts. Automaton has 23026 states and 26072 transitions. Word has length 271 [2021-10-24 10:51:44,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:51:44,665 INFO L470 AbstractCegarLoop]: Abstraction has 23026 states and 26072 transitions. [2021-10-24 10:51:44,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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) [2021-10-24 10:51:44,665 INFO L276 IsEmpty]: Start isEmpty. Operand 23026 states and 26072 transitions. [2021-10-24 10:51:44,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-10-24 10:51:44,686 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:51:44,687 INFO L512 BasicCegarLoop]: trace histogram [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, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:51:44,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-24 10:51:44,687 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:51:44,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:51:44,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1036100960, now seen corresponding path program 1 times [2021-10-24 10:51:44,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:51:44,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25019980] [2021-10-24 10:51:44,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:44,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:51:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:51:44,900 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:51:44,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25019980] [2021-10-24 10:51:44,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25019980] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:51:44,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:51:44,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:51:44,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761849854] [2021-10-24 10:51:44,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:51:44,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:51:44,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:51:44,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:44,903 INFO L87 Difference]: Start difference. First operand 23026 states and 26072 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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) [2021-10-24 10:51:45,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:51:45,736 INFO L93 Difference]: Finished difference Result 45908 states and 52095 transitions. [2021-10-24 10:51:45,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:51:45,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 294 [2021-10-24 10:51:45,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:51:45,762 INFO L225 Difference]: With dead ends: 45908 [2021-10-24 10:51:45,762 INFO L226 Difference]: Without dead ends: 25028 [2021-10-24 10:51:45,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:51:45,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25028 states. [2021-10-24 10:51:46,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25028 to 24599. [2021-10-24 10:51:46,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24599 states, 24598 states have (on average 1.1254980079681276) internal successors, (27685), 24598 states have internal predecessors, (27685), 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) [2021-10-24 10:51:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24599 states to 24599 states and 27685 transitions. [2021-10-24 10:51:46,204 INFO L78 Accepts]: Start accepts. Automaton has 24599 states and 27685 transitions. Word has length 294 [2021-10-24 10:51:46,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:51:46,205 INFO L470 AbstractCegarLoop]: Abstraction has 24599 states and 27685 transitions. [2021-10-24 10:51:46,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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) [2021-10-24 10:51:46,205 INFO L276 IsEmpty]: Start isEmpty. Operand 24599 states and 27685 transitions. [2021-10-24 10:51:46,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-10-24 10:51:46,228 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:51:46,228 INFO L512 BasicCegarLoop]: trace histogram [4, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:51:46,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-24 10:51:46,229 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:51:46,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:51:46,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1721762005, now seen corresponding path program 1 times [2021-10-24 10:51:46,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:51:46,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500601573] [2021-10-24 10:51:46,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:46,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:51:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 173 proven. 11 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-10-24 10:51:46,400 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:51:46,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500601573] [2021-10-24 10:51:46,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500601573] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:51:46,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798191925] [2021-10-24 10:51:46,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:46,401 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:51:46,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:51:46,404 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:51:46,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-24 10:51:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:46,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-24 10:51:46,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:51:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-10-24 10:51:47,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:51:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-10-24 10:51:48,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798191925] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:51:48,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:51:48,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2021-10-24 10:51:48,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800479127] [2021-10-24 10:51:48,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:51:48,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:51:48,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:51:48,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:51:48,327 INFO L87 Difference]: Start difference. First operand 24599 states and 27685 transitions. Second operand has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 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) [2021-10-24 10:51:49,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:51:49,569 INFO L93 Difference]: Finished difference Result 50055 states and 57063 transitions. [2021-10-24 10:51:49,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:51:49,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 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 306 [2021-10-24 10:51:49,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:51:49,598 INFO L225 Difference]: With dead ends: 50055 [2021-10-24 10:51:49,598 INFO L226 Difference]: Without dead ends: 27602 [2021-10-24 10:51:49,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 609 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:51:49,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27602 states. [2021-10-24 10:51:50,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27602 to 27602. [2021-10-24 10:51:50,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27602 states, 27601 states have (on average 1.1413716894315424) internal successors, (31503), 27601 states have internal predecessors, (31503), 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) [2021-10-24 10:51:50,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27602 states to 27602 states and 31503 transitions. [2021-10-24 10:51:50,087 INFO L78 Accepts]: Start accepts. Automaton has 27602 states and 31503 transitions. Word has length 306 [2021-10-24 10:51:50,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:51:50,088 INFO L470 AbstractCegarLoop]: Abstraction has 27602 states and 31503 transitions. [2021-10-24 10:51:50,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 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) [2021-10-24 10:51:50,089 INFO L276 IsEmpty]: Start isEmpty. Operand 27602 states and 31503 transitions. [2021-10-24 10:51:50,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-10-24 10:51:50,115 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:51:50,115 INFO L512 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:51:50,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-24 10:51:50,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-24 10:51:50,329 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:51:50,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:51:50,330 INFO L82 PathProgramCache]: Analyzing trace with hash -2136557530, now seen corresponding path program 1 times [2021-10-24 10:51:50,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:51:50,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722345613] [2021-10-24 10:51:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:50,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:51:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-10-24 10:51:50,502 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:51:50,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722345613] [2021-10-24 10:51:50,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722345613] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:51:50,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:51:50,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:51:50,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856773999] [2021-10-24 10:51:50,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:51:50,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:51:50,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:51:50,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:51:50,506 INFO L87 Difference]: Start difference. First operand 27602 states and 31503 transitions. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 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) [2021-10-24 10:51:51,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:51:51,514 INFO L93 Difference]: Finished difference Result 52915 states and 60563 transitions. [2021-10-24 10:51:51,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:51:51,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 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 352 [2021-10-24 10:51:51,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:51:51,538 INFO L225 Difference]: With dead ends: 52915 [2021-10-24 10:51:51,538 INFO L226 Difference]: Without dead ends: 27459 [2021-10-24 10:51:51,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:51:51,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27459 states. [2021-10-24 10:51:51,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27459 to 27316. [2021-10-24 10:51:51,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27316 states, 27315 states have (on average 1.1407651473549332) internal successors, (31160), 27315 states have internal predecessors, (31160), 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) [2021-10-24 10:51:52,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27316 states to 27316 states and 31160 transitions. [2021-10-24 10:51:52,053 INFO L78 Accepts]: Start accepts. Automaton has 27316 states and 31160 transitions. Word has length 352 [2021-10-24 10:51:52,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:51:52,054 INFO L470 AbstractCegarLoop]: Abstraction has 27316 states and 31160 transitions. [2021-10-24 10:51:52,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 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) [2021-10-24 10:51:52,054 INFO L276 IsEmpty]: Start isEmpty. Operand 27316 states and 31160 transitions. [2021-10-24 10:51:52,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-10-24 10:51:52,077 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:51:52,078 INFO L512 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:51:52,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-24 10:51:52,078 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:51:52,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:51:52,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1126254499, now seen corresponding path program 1 times [2021-10-24 10:51:52,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:51:52,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433211177] [2021-10-24 10:51:52,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:52,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:51:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:52,335 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-10-24 10:51:52,335 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:51:52,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433211177] [2021-10-24 10:51:52,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433211177] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:51:52,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888134773] [2021-10-24 10:51:52,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:51:52,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:51:52,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:51:52,340 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:51:52,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-24 10:51:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:51:52,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 10:51:52,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:51:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 215 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-10-24 10:51:55,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:51:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 215 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-10-24 10:51:56,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888134773] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:51:56,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:51:56,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 7 [2021-10-24 10:51:56,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245070822] [2021-10-24 10:51:56,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:51:56,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:51:56,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:51:56,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-24 10:51:56,788 INFO L87 Difference]: Start difference. First operand 27316 states and 31160 transitions. Second operand has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 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) [2021-10-24 10:51:57,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:51:57,756 INFO L93 Difference]: Finished difference Result 55344 states and 63353 transitions. [2021-10-24 10:51:57,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:51:57,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 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 359 [2021-10-24 10:51:57,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:51:57,757 INFO L225 Difference]: With dead ends: 55344 [2021-10-24 10:51:57,758 INFO L226 Difference]: Without dead ends: 0 [2021-10-24 10:51:57,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-24 10:51:57,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-24 10:51:57,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-24 10:51:57,771 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) [2021-10-24 10:51:57,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-24 10:51:57,772 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 359 [2021-10-24 10:51:57,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:51:57,772 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-24 10:51:57,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 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) [2021-10-24 10:51:57,772 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-24 10:51:57,773 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-24 10:51:57,775 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:51:57,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-24 10:51:57,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:51:57,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-24 10:51:58,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:51:58,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:51:58,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:51:59,282 INFO L857 garLoopResultBuilder]: For program point L498(lines 498 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,282 INFO L857 garLoopResultBuilder]: For program point L432(lines 432 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,283 INFO L857 garLoopResultBuilder]: For program point L366(lines 366 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,283 INFO L857 garLoopResultBuilder]: For program point L763(lines 763 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,283 INFO L857 garLoopResultBuilder]: For program point L632(lines 632 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,283 INFO L857 garLoopResultBuilder]: For program point L566(lines 566 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,283 INFO L857 garLoopResultBuilder]: For program point L302(lines 302 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,283 INFO L857 garLoopResultBuilder]: For program point L1293(lines 1293 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,283 INFO L857 garLoopResultBuilder]: For program point L1360(lines 1360 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,283 INFO L857 garLoopResultBuilder]: For program point L1162(lines 1162 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,283 INFO L857 garLoopResultBuilder]: For program point L105(lines 105 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,283 INFO L857 garLoopResultBuilder]: For program point L1096(lines 1096 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,284 INFO L857 garLoopResultBuilder]: For program point L1031(lines 1031 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,284 INFO L857 garLoopResultBuilder]: For program point L965(lines 965 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,284 INFO L857 garLoopResultBuilder]: For program point L899(lines 899 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,284 INFO L857 garLoopResultBuilder]: For program point L174(lines 174 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,284 INFO L857 garLoopResultBuilder]: For program point L835(lines 835 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,284 INFO L857 garLoopResultBuilder]: For program point L771(lines 771 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,284 INFO L857 garLoopResultBuilder]: For program point L507(lines 507 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,284 INFO L857 garLoopResultBuilder]: For program point L243(lines 243 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,284 INFO L857 garLoopResultBuilder]: For program point L1433(lines 1433 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,284 INFO L857 garLoopResultBuilder]: For program point L376(lines 376 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,284 INFO L857 garLoopResultBuilder]: For program point L1566-1(lines 64 1660) no Hoare annotation was computed. [2021-10-24 10:51:59,285 INFO L857 garLoopResultBuilder]: For program point L311(lines 311 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,285 INFO L857 garLoopResultBuilder]: For program point L1236(lines 1236 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,285 INFO L857 garLoopResultBuilder]: For program point L576(lines 576 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,285 INFO L857 garLoopResultBuilder]: For program point L444(lines 444 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,285 INFO L857 garLoopResultBuilder]: For program point L1369(lines 1369 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,285 INFO L857 garLoopResultBuilder]: For program point L1105(lines 1105 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,285 INFO L857 garLoopResultBuilder]: For program point L643(lines 643 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,285 INFO L857 garLoopResultBuilder]: For program point L1172(lines 1172 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,285 INFO L857 garLoopResultBuilder]: For program point L115(lines 115 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,285 INFO L857 garLoopResultBuilder]: For program point L1569-1(lines 64 1660) no Hoare annotation was computed. [2021-10-24 10:51:59,285 INFO L857 garLoopResultBuilder]: For program point L248(lines 248 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,286 INFO L857 garLoopResultBuilder]: For program point L182(lines 182 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,286 INFO L857 garLoopResultBuilder]: For program point L1041(lines 1041 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,286 INFO L857 garLoopResultBuilder]: For program point L909(lines 909 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,286 INFO L857 garLoopResultBuilder]: For program point L711(lines 711 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,286 INFO L857 garLoopResultBuilder]: For program point L1570(line 1570) no Hoare annotation was computed. [2021-10-24 10:51:59,286 INFO L857 garLoopResultBuilder]: For program point L976(lines 976 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,286 INFO L857 garLoopResultBuilder]: For program point L779(lines 779 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,286 INFO L857 garLoopResultBuilder]: For program point L846(lines 846 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,286 INFO L857 garLoopResultBuilder]: For program point L451(lines 451 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,286 INFO L857 garLoopResultBuilder]: For program point L1442(lines 1442 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,286 INFO L857 garLoopResultBuilder]: For program point L584(lines 584 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,287 INFO L857 garLoopResultBuilder]: For program point L387(lines 387 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,287 INFO L857 garLoopResultBuilder]: For program point L1114(lines 1114 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,287 INFO L857 garLoopResultBuilder]: For program point L1048(lines 1048 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,287 INFO L857 garLoopResultBuilder]: For program point L322(lines 322 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,287 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-24 10:51:59,287 INFO L857 garLoopResultBuilder]: For program point L1247(lines 1247 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,287 INFO L857 garLoopResultBuilder]: For program point L124(lines 124 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,287 INFO L857 garLoopResultBuilder]: For program point L917(lines 917 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,287 INFO L857 garLoopResultBuilder]: For program point L719(lines 719 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,287 INFO L857 garLoopResultBuilder]: For program point L653(lines 653 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,287 INFO L857 garLoopResultBuilder]: For program point L191(lines 191 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,288 INFO L857 garLoopResultBuilder]: For program point L1315(lines 1315 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,288 INFO L857 garLoopResultBuilder]: For program point L258(lines 258 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,290 INFO L857 garLoopResultBuilder]: For program point L1183(lines 1183 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,290 INFO L857 garLoopResultBuilder]: For program point L985(lines 985 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,290 INFO L857 garLoopResultBuilder]: For program point L787(lines 787 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,290 INFO L857 garLoopResultBuilder]: For program point L523(lines 523 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,291 INFO L857 garLoopResultBuilder]: For program point L854(lines 854 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,291 INFO L857 garLoopResultBuilder]: For program point L460(lines 460 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,291 INFO L857 garLoopResultBuilder]: For program point L593(lines 593 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,291 INFO L857 garLoopResultBuilder]: For program point L1452(lines 1452 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,291 INFO L857 garLoopResultBuilder]: For program point L329(lines 329 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,291 INFO L857 garLoopResultBuilder]: For program point L1122(lines 1122 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,291 INFO L857 garLoopResultBuilder]: For program point L65(lines 65 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,292 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 1570) no Hoare annotation was computed. [2021-10-24 10:51:59,292 INFO L857 garLoopResultBuilder]: For program point L794(lines 794 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,292 INFO L857 garLoopResultBuilder]: For program point L1323(lines 1323 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,292 INFO L857 garLoopResultBuilder]: For program point L993(lines 993 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,292 INFO L857 garLoopResultBuilder]: For program point L927(lines 927 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,292 INFO L857 garLoopResultBuilder]: For program point L663(lines 663 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,293 INFO L857 garLoopResultBuilder]: For program point L267(lines 267 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,293 INFO L857 garLoopResultBuilder]: For program point L201(lines 201 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,293 INFO L857 garLoopResultBuilder]: For program point L1192(lines 1192 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,293 INFO L857 garLoopResultBuilder]: For program point L532(lines 532 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,293 INFO L857 garLoopResultBuilder]: For program point L1391(lines 1391 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,293 INFO L857 garLoopResultBuilder]: For program point L1259(lines 1259 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,293 INFO L857 garLoopResultBuilder]: For program point L136(lines 136 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,294 INFO L857 garLoopResultBuilder]: For program point L863(lines 863 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,294 INFO L857 garLoopResultBuilder]: For program point L468(lines 468 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,294 INFO L857 garLoopResultBuilder]: For program point L1130(lines 1130 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,294 INFO L857 garLoopResultBuilder]: For program point L668(lines 668 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,295 INFO L853 garLoopResultBuilder]: At program point L1659(lines 64 1660) the Hoare annotation is: (let ((.cse3 (= ~a3~0 0)) (.cse4 (<= 2 ~a3~0)) (.cse5 (= ~a6~0 0)) (.cse2 (= ~a27~0 1)) (.cse1 (= ~a6~0 1)) (.cse0 (= ~a5~0 1))) (or (and .cse0 (= ~a3~0 1)) (and .cse0 (= ~a11~0 1) .cse1 .cse2 .cse3) (and .cse0 (= ~a11~0 ~a2~0) .cse1) (and .cse0 .cse4 .cse5) (and .cse0 (= ~a12~0 1) .cse3) (and .cse0 .cse4 .cse1) (and .cse0 (or (and .cse5 .cse2) (and (= ~a27~0 0) .cse1))) (and (= ~a26~0 1) .cse0))) [2021-10-24 10:51:59,295 INFO L857 garLoopResultBuilder]: For program point L602(lines 602 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,295 INFO L857 garLoopResultBuilder]: For program point L1462(lines 1462 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,295 INFO L857 garLoopResultBuilder]: For program point L339(lines 339 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,295 INFO L857 garLoopResultBuilder]: For program point L1331(lines 1331 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,295 INFO L860 garLoopResultBuilder]: At program point L1662(lines 1662 1679) the Hoare annotation is: true [2021-10-24 10:51:59,296 INFO L857 garLoopResultBuilder]: For program point L539(lines 539 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,296 INFO L857 garLoopResultBuilder]: For program point L407(lines 407 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,296 INFO L857 garLoopResultBuilder]: For program point L275(lines 275 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,296 INFO L857 garLoopResultBuilder]: For program point L1200(lines 1200 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,296 INFO L857 garLoopResultBuilder]: For program point L805(lines 805 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,296 INFO L857 garLoopResultBuilder]: For program point L145(lines 145 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,296 INFO L857 garLoopResultBuilder]: For program point L1004(lines 1004 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,297 INFO L857 garLoopResultBuilder]: For program point L1137(lines 1137 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,297 INFO L857 garLoopResultBuilder]: For program point L1071(lines 1071 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,297 INFO L857 garLoopResultBuilder]: For program point L873(lines 873 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,297 INFO L857 garLoopResultBuilder]: For program point L675(lines 675 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,297 INFO L857 garLoopResultBuilder]: For program point L477(lines 477 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,297 INFO L857 garLoopResultBuilder]: For program point L1336(lines 1336 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,297 INFO L857 garLoopResultBuilder]: For program point L743(lines 743 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,299 INFO L853 garLoopResultBuilder]: At program point L1668-2(lines 1668 1678) the Hoare annotation is: (let ((.cse3 (= ~a3~0 0)) (.cse4 (<= 2 ~a3~0)) (.cse5 (= ~a6~0 0)) (.cse2 (= ~a27~0 1)) (.cse1 (= ~a6~0 1)) (.cse0 (= ~a5~0 1))) (or (and .cse0 (= ~a3~0 1)) (and .cse0 (= ~a11~0 1) .cse1 .cse2 .cse3) (and .cse0 (= ~a11~0 ~a2~0) .cse1) (and .cse0 .cse4 .cse5) (and .cse0 (= ~a12~0 1) .cse3) (and .cse0 .cse4 .cse1) (and .cse0 (or (and .cse5 .cse2) (and (= ~a27~0 0) .cse1))) (and (= ~a26~0 1) .cse0))) [2021-10-24 10:51:59,300 INFO L857 garLoopResultBuilder]: For program point L1470(lines 1470 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,300 INFO L857 garLoopResultBuilder]: For program point L83(lines 83 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,300 INFO L857 garLoopResultBuilder]: For program point L613(lines 613 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,300 INFO L857 garLoopResultBuilder]: For program point L415(lines 415 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,300 INFO L857 garLoopResultBuilder]: For program point L349(lines 349 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,301 INFO L857 garLoopResultBuilder]: For program point L1142(lines 1142 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,301 INFO L857 garLoopResultBuilder]: For program point L1076(lines 1076 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,301 INFO L857 garLoopResultBuilder]: For program point L878(lines 878 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,301 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-24 10:51:59,301 INFO L857 garLoopResultBuilder]: For program point L549(lines 549 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,302 INFO L857 garLoopResultBuilder]: For program point L1210(lines 1210 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,302 INFO L857 garLoopResultBuilder]: For program point L814(lines 814 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,302 INFO L857 garLoopResultBuilder]: For program point L1673(line 1673) no Hoare annotation was computed. [2021-10-24 10:51:59,302 INFO L857 garLoopResultBuilder]: For program point L286(lines 286 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,302 INFO L857 garLoopResultBuilder]: For program point L1013(lines 1013 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,302 INFO L857 garLoopResultBuilder]: For program point L947(lines 947 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,302 INFO L857 garLoopResultBuilder]: For program point L156(lines 156 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,303 INFO L857 garLoopResultBuilder]: For program point L685(lines 685 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,303 INFO L857 garLoopResultBuilder]: For program point L1412(lines 1412 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,303 INFO L857 garLoopResultBuilder]: For program point L1346(lines 1346 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,303 INFO L857 garLoopResultBuilder]: For program point L223(lines 223 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,303 INFO L857 garLoopResultBuilder]: For program point L92(lines 92 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,303 INFO L857 garLoopResultBuilder]: For program point L753(lines 753 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,303 INFO L857 garLoopResultBuilder]: For program point L1084(lines 1084 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,304 INFO L857 garLoopResultBuilder]: For program point L556(lines 556 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,304 INFO L857 garLoopResultBuilder]: For program point L490(lines 490 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,304 INFO L857 garLoopResultBuilder]: For program point L424(lines 424 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,304 INFO L857 garLoopResultBuilder]: For program point L358(lines 358 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,304 INFO L857 garLoopResultBuilder]: For program point L1284(lines 1284 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,304 INFO L857 garLoopResultBuilder]: For program point L1152(lines 1152 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,304 INFO L857 garLoopResultBuilder]: For program point L624(lines 624 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,305 INFO L857 garLoopResultBuilder]: For program point L294(lines 294 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,305 INFO L857 garLoopResultBuilder]: For program point L1021(lines 1021 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,305 INFO L857 garLoopResultBuilder]: For program point L823(lines 823 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,305 INFO L857 garLoopResultBuilder]: For program point L1220(lines 1220 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,305 INFO L857 garLoopResultBuilder]: For program point L957(lines 957 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,305 INFO L857 garLoopResultBuilder]: For program point L1354(lines 1354 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,306 INFO L857 garLoopResultBuilder]: For program point L165(lines 165 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,306 INFO L857 garLoopResultBuilder]: For program point L99(lines 99 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,306 INFO L857 garLoopResultBuilder]: For program point L694(lines 694 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,306 INFO L857 garLoopResultBuilder]: For program point L232(lines 232 1475) no Hoare annotation was computed. [2021-10-24 10:51:59,311 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:51:59,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:51:59 BoogieIcfgContainer [2021-10-24 10:51:59,346 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:51:59,346 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:51:59,347 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:51:59,347 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:51:59,348 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:51:21" (3/4) ... [2021-10-24 10:51:59,351 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-24 10:51:59,393 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 123 nodes and edges [2021-10-24 10:51:59,397 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-10-24 10:51:59,402 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-24 10:51:59,406 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-24 10:51:59,671 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 10:51:59,671 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:51:59,672 INFO L168 Benchmark]: Toolchain (without parser) took 43061.39 ms. Allocated memory was 104.9 MB in the beginning and 5.6 GB in the end (delta: 5.5 GB). Free memory was 67.2 MB in the beginning and 4.9 GB in the end (delta: -4.9 GB). Peak memory consumption was 659.3 MB. Max. memory is 16.1 GB. [2021-10-24 10:51:59,673 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 104.9 MB. Free memory was 62.3 MB in the beginning and 62.3 MB in the end (delta: 42.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:51:59,674 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1142.94 ms. Allocated memory was 104.9 MB in the beginning and 138.4 MB in the end (delta: 33.6 MB). Free memory was 67.2 MB in the beginning and 98.1 MB in the end (delta: -30.9 MB). Peak memory consumption was 40.8 MB. Max. memory is 16.1 GB. [2021-10-24 10:51:59,674 INFO L168 Benchmark]: Boogie Procedure Inliner took 175.49 ms. Allocated memory is still 138.4 MB. Free memory was 98.1 MB in the beginning and 84.1 MB in the end (delta: 14.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-24 10:51:59,674 INFO L168 Benchmark]: Boogie Preprocessor took 151.34 ms. Allocated memory is still 138.4 MB. Free memory was 84.1 MB in the beginning and 73.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 10:51:59,675 INFO L168 Benchmark]: RCFGBuilder took 2944.53 ms. Allocated memory was 138.4 MB in the beginning and 211.8 MB in the end (delta: 73.4 MB). Free memory was 73.6 MB in the beginning and 103.0 MB in the end (delta: -29.4 MB). Peak memory consumption was 56.6 MB. Max. memory is 16.1 GB. [2021-10-24 10:51:59,676 INFO L168 Benchmark]: TraceAbstraction took 38309.19 ms. Allocated memory was 211.8 MB in the beginning and 5.6 GB in the end (delta: 5.4 GB). Free memory was 103.0 MB in the beginning and 5.0 GB in the end (delta: -4.9 GB). Peak memory consumption was 787.4 MB. Max. memory is 16.1 GB. [2021-10-24 10:51:59,676 INFO L168 Benchmark]: Witness Printer took 324.60 ms. Allocated memory is still 5.6 GB. Free memory was 5.0 GB in the beginning and 4.9 GB in the end (delta: 36.7 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2021-10-24 10:51:59,679 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 104.9 MB. Free memory was 62.3 MB in the beginning and 62.3 MB in the end (delta: 42.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1142.94 ms. Allocated memory was 104.9 MB in the beginning and 138.4 MB in the end (delta: 33.6 MB). Free memory was 67.2 MB in the beginning and 98.1 MB in the end (delta: -30.9 MB). Peak memory consumption was 40.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 175.49 ms. Allocated memory is still 138.4 MB. Free memory was 98.1 MB in the beginning and 84.1 MB in the end (delta: 14.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 151.34 ms. Allocated memory is still 138.4 MB. Free memory was 84.1 MB in the beginning and 73.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2944.53 ms. Allocated memory was 138.4 MB in the beginning and 211.8 MB in the end (delta: 73.4 MB). Free memory was 73.6 MB in the beginning and 103.0 MB in the end (delta: -29.4 MB). Peak memory consumption was 56.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 38309.19 ms. Allocated memory was 211.8 MB in the beginning and 5.6 GB in the end (delta: 5.4 GB). Free memory was 103.0 MB in the beginning and 5.0 GB in the end (delta: -4.9 GB). Peak memory consumption was 787.4 MB. Max. memory is 16.1 GB. * Witness Printer took 324.60 ms. Allocated memory is still 5.6 GB. Free memory was 5.0 GB in the beginning and 4.9 GB in the end (delta: 36.7 MB). Peak memory consumption was 37.7 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: 1570]: 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, 148 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 38208.8ms, OverallIterations: 20, TraceHistogramMax: 5, EmptinessCheckTime: 357.3ms, AutomataDifference: 18705.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1289.7ms, InitialAbstractionConstructionTime: 13.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2262 SDtfs, 2566 SDslu, 106 SDs, 0 SdLazy, 10310 SolverSat, 1991 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12158.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1739 GetRequests, 1706 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 189.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=27602occurred in iteration=18, InterpolantAutomatonStates: 65, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5371.7ms AutomataMinimizationTime, 20 MinimizatonAttempts, 2012 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 451 NumberOfFragments, 181 HoareAnnotationTreeSize, 3 FomulaSimplifications, 15316 FormulaSimplificationTreeSizeReduction, 958.6ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 94 FormulaSimplificationTreeSizeReductionInter, 319.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 589.3ms SsaConstructionTime, 1228.4ms SatisfiabilityAnalysisTime, 8987.5ms InterpolantComputationTime, 5452 NumberOfCodeBlocks, 5452 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 6272 ConstructedInterpolants, 0 QuantifiedInterpolants, 19441 SizeOfPredicates, 12 NumberOfNonLiveVariables, 1686 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 26 InterpolantComputations, 23 PerfectInterpolantSequences, 3652/3675 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: 1662]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 64]: Loop Invariant Derived loop invariant: (((((((a5 == 1 && a3 == 1) || ((((a5 == 1 && a11 == 1) && a6 == 1) && a27 == 1) && a3 == 0)) || ((a5 == 1 && a11 == a2) && a6 == 1)) || ((a5 == 1 && 2 <= a3) && a6 == 0)) || ((a5 == 1 && a12 == 1) && a3 == 0)) || ((a5 == 1 && 2 <= a3) && a6 == 1)) || (a5 == 1 && ((a6 == 0 && a27 == 1) || (a27 == 0 && a6 == 1)))) || (a26 == 1 && a5 == 1) - InvariantResult [Line: 1668]: Loop Invariant Derived loop invariant: (((((((a5 == 1 && a3 == 1) || ((((a5 == 1 && a11 == 1) && a6 == 1) && a27 == 1) && a3 == 0)) || ((a5 == 1 && a11 == a2) && a6 == 1)) || ((a5 == 1 && 2 <= a3) && a6 == 0)) || ((a5 == 1 && a12 == 1) && a3 == 0)) || ((a5 == 1 && 2 <= a3) && a6 == 1)) || (a5 == 1 && ((a6 == 0 && a27 == 1) || (a27 == 0 && a6 == 1)))) || (a26 == 1 && a5 == 1) RESULT: Ultimate proved your program to be correct! [2021-10-24 10:51:59,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1def3d9f-51f4-4125-a766-49297cc1e09e/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...