./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_srvr_6.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_srvr_6.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P --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 d0f2e33ac87f1f1d9db23cfd04cd47631e40f0ab807306c8f57e0f0ac0650234 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:57:40,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:57:40,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:57:40,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:57:40,444 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:57:40,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:57:40,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:57:40,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:57:40,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:57:40,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:57:40,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:57:40,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:57:40,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:57:40,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:57:40,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:57:40,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:57:40,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:57:40,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:57:40,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:57:40,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:57:40,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:57:40,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:57:40,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:57:40,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:57:40,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:57:40,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:57:40,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:57:40,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:57:40,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:57:40,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:57:40,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:57:40,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:57:40,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:57:40,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:57:40,525 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:57:40,526 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:57:40,526 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:57:40,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:57:40,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:57:40,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:57:40,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:57:40,529 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:57:40,574 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:57:40,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:57:40,578 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:57:40,578 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:57:40,585 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:57:40,585 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:57:40,586 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:57:40,586 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:57:40,586 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:57:40,586 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:57:40,591 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:57:40,592 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:57:40,592 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:57:40,592 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:57:40,592 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:57:40,593 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:57:40,593 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:57:40,593 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:57:40,594 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:57:40,594 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:57:40,594 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:57:40,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:57:40,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:57:40,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:57:40,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:57:40,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:57:40,596 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:57:40,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:57:40,596 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:57:40,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:57:40,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:57:40,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:57:40,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:57:40,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:57:40,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:57:40,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:57:40,598 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:57:40,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:57:40,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:57:40,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:57:40,599 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:57:40,599 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_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0f2e33ac87f1f1d9db23cfd04cd47631e40f0ab807306c8f57e0f0ac0650234 [2021-11-21 00:57:40,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:57:40,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:57:40,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:57:40,968 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:57:40,969 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:57:40,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/openssl-simplified/s3_srvr_6.cil-2.c [2021-11-21 00:57:41,046 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/data/1aa1776bb/c20ced2d66b64a5e9dfa4b7d2d7d4796/FLAG2f98e3606 [2021-11-21 00:57:41,623 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:57:41,639 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/sv-benchmarks/c/openssl-simplified/s3_srvr_6.cil-2.c [2021-11-21 00:57:41,657 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/data/1aa1776bb/c20ced2d66b64a5e9dfa4b7d2d7d4796/FLAG2f98e3606 [2021-11-21 00:57:41,932 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/data/1aa1776bb/c20ced2d66b64a5e9dfa4b7d2d7d4796 [2021-11-21 00:57:41,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:57:41,937 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:57:41,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:57:41,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:57:41,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:57:41,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:57:41" (1/1) ... [2021-11-21 00:57:41,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e4a2f8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:41, skipping insertion in model container [2021-11-21 00:57:41,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:57:41" (1/1) ... [2021-11-21 00:57:41,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:57:42,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:57:42,294 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/sv-benchmarks/c/openssl-simplified/s3_srvr_6.cil-2.c[48455,48468] [2021-11-21 00:57:42,302 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:57:42,312 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:57:42,375 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/sv-benchmarks/c/openssl-simplified/s3_srvr_6.cil-2.c[48455,48468] [2021-11-21 00:57:42,379 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:57:42,394 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:57:42,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:42 WrapperNode [2021-11-21 00:57:42,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:57:42,396 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:57:42,396 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:57:42,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:57:42,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:42" (1/1) ... [2021-11-21 00:57:42,427 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:42" (1/1) ... [2021-11-21 00:57:42,492 INFO L137 Inliner]: procedures = 15, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 580 [2021-11-21 00:57:42,492 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:57:42,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:57:42,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:57:42,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:57:42,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:42" (1/1) ... [2021-11-21 00:57:42,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:42" (1/1) ... [2021-11-21 00:57:42,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:42" (1/1) ... [2021-11-21 00:57:42,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:42" (1/1) ... [2021-11-21 00:57:42,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:42" (1/1) ... [2021-11-21 00:57:42,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:42" (1/1) ... [2021-11-21 00:57:42,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:42" (1/1) ... [2021-11-21 00:57:42,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:57:42,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:57:42,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:57:42,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:57:42,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:42" (1/1) ... [2021-11-21 00:57:42,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:57:42,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:57:42,625 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:57:42,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:57:42,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:57:42,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:57:42,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:57:42,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:57:42,798 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:57:42,801 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:57:42,824 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-21 00:57:43,534 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-21 00:57:43,535 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-21 00:57:43,535 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:57:43,752 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:57:43,752 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:57:43,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:57:43 BoogieIcfgContainer [2021-11-21 00:57:43,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:57:43,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:57:43,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:57:43,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:57:43,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:57:41" (1/3) ... [2021-11-21 00:57:43,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5ca524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:57:43, skipping insertion in model container [2021-11-21 00:57:43,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:57:42" (2/3) ... [2021-11-21 00:57:43,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5ca524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:57:43, skipping insertion in model container [2021-11-21 00:57:43,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:57:43" (3/3) ... [2021-11-21 00:57:43,766 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_6.cil-2.c [2021-11-21 00:57:43,772 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:57:43,772 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:57:43,846 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:57:43,856 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 [2021-11-21 00:57:43,856 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:57:43,888 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 1.7777777777777777) internal successors, (192), 109 states have internal predecessors, (192), 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) [2021-11-21 00:57:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 00:57:43,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:43,903 INFO L514 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] [2021-11-21 00:57:43,904 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:43,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:43,914 INFO L85 PathProgramCache]: Analyzing trace with hash 631903606, now seen corresponding path program 1 times [2021-11-21 00:57:43,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:43,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590988361] [2021-11-21 00:57:43,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:43,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:57:44,229 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:44,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590988361] [2021-11-21 00:57:44,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590988361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:44,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:44,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:44,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741799909] [2021-11-21 00:57:44,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:44,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:44,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:44,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:44,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:44,269 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 1.7777777777777777) internal successors, (192), 109 states have internal predecessors, (192), 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 13.0) internal successors, (39), 2 states have internal predecessors, (39), 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) [2021-11-21 00:57:44,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:44,504 INFO L93 Difference]: Finished difference Result 266 states and 468 transitions. [2021-11-21 00:57:44,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:44,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 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 39 [2021-11-21 00:57:44,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:44,520 INFO L225 Difference]: With dead ends: 266 [2021-11-21 00:57:44,520 INFO L226 Difference]: Without dead ends: 152 [2021-11-21 00:57:44,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:44,527 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 136 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:44,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 121 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:57:44,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-21 00:57:44,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 143. [2021-11-21 00:57:44,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.619718309859155) internal successors, (230), 142 states have internal predecessors, (230), 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) [2021-11-21 00:57:44,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 230 transitions. [2021-11-21 00:57:44,583 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 230 transitions. Word has length 39 [2021-11-21 00:57:44,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:44,583 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 230 transitions. [2021-11-21 00:57:44,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 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) [2021-11-21 00:57:44,584 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 230 transitions. [2021-11-21 00:57:44,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-21 00:57:44,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:44,587 INFO L514 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] [2021-11-21 00:57:44,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:57:44,587 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:44,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:44,588 INFO L85 PathProgramCache]: Analyzing trace with hash -40448900, now seen corresponding path program 1 times [2021-11-21 00:57:44,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:44,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398185646] [2021-11-21 00:57:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:44,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:57:44,655 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:44,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398185646] [2021-11-21 00:57:44,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398185646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:44,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:44,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:44,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316935841] [2021-11-21 00:57:44,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:44,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:44,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:44,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:44,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:44,660 INFO L87 Difference]: Start difference. First operand 143 states and 230 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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) [2021-11-21 00:57:44,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:44,884 INFO L93 Difference]: Finished difference Result 330 states and 541 transitions. [2021-11-21 00:57:44,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:44,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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 40 [2021-11-21 00:57:44,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:44,888 INFO L225 Difference]: With dead ends: 330 [2021-11-21 00:57:44,889 INFO L226 Difference]: Without dead ends: 189 [2021-11-21 00:57:44,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:44,893 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 107 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:44,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 96 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:57:44,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-21 00:57:44,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 180. [2021-11-21 00:57:44,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.670391061452514) internal successors, (299), 179 states have internal predecessors, (299), 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) [2021-11-21 00:57:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 299 transitions. [2021-11-21 00:57:44,916 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 299 transitions. Word has length 40 [2021-11-21 00:57:44,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:44,917 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 299 transitions. [2021-11-21 00:57:44,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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) [2021-11-21 00:57:44,917 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 299 transitions. [2021-11-21 00:57:44,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 00:57:44,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:44,922 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:57:44,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:57:44,923 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:44,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:44,924 INFO L85 PathProgramCache]: Analyzing trace with hash 604106262, now seen corresponding path program 1 times [2021-11-21 00:57:44,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:44,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339829030] [2021-11-21 00:57:44,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:44,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:57:45,027 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:45,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339829030] [2021-11-21 00:57:45,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339829030] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:45,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:45,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:45,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009979337] [2021-11-21 00:57:45,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:45,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:45,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:45,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:45,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:45,039 INFO L87 Difference]: Start difference. First operand 180 states and 299 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:57:45,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:45,255 INFO L93 Difference]: Finished difference Result 387 states and 650 transitions. [2021-11-21 00:57:45,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:45,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-21 00:57:45,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:45,261 INFO L225 Difference]: With dead ends: 387 [2021-11-21 00:57:45,261 INFO L226 Difference]: Without dead ends: 209 [2021-11-21 00:57:45,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:45,275 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 113 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:45,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 86 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:57:45,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-21 00:57:45,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-11-21 00:57:45,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.6875) internal successors, (351), 208 states have internal predecessors, (351), 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) [2021-11-21 00:57:45,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 351 transitions. [2021-11-21 00:57:45,301 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 351 transitions. Word has length 66 [2021-11-21 00:57:45,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:45,302 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 351 transitions. [2021-11-21 00:57:45,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:57:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 351 transitions. [2021-11-21 00:57:45,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-21 00:57:45,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:45,310 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:57:45,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:57:45,311 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:45,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:45,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1078619118, now seen corresponding path program 1 times [2021-11-21 00:57:45,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:45,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146470763] [2021-11-21 00:57:45,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:45,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:45,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:57:45,429 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:45,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146470763] [2021-11-21 00:57:45,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146470763] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:45,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:45,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:45,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177116941] [2021-11-21 00:57:45,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:45,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:45,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:45,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:45,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:45,433 INFO L87 Difference]: Start difference. First operand 209 states and 351 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:57:45,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:45,622 INFO L93 Difference]: Finished difference Result 452 states and 765 transitions. [2021-11-21 00:57:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:45,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-21 00:57:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:45,627 INFO L225 Difference]: With dead ends: 452 [2021-11-21 00:57:45,627 INFO L226 Difference]: Without dead ends: 245 [2021-11-21 00:57:45,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:45,637 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 111 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:45,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 83 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:57:45,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-21 00:57:45,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 243. [2021-11-21 00:57:45,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.7024793388429753) internal successors, (412), 242 states have internal predecessors, (412), 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) [2021-11-21 00:57:45,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 412 transitions. [2021-11-21 00:57:45,670 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 412 transitions. Word has length 71 [2021-11-21 00:57:45,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:45,671 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 412 transitions. [2021-11-21 00:57:45,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:57:45,671 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 412 transitions. [2021-11-21 00:57:45,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 00:57:45,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:45,673 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:57:45,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:57:45,673 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:45,674 INFO L85 PathProgramCache]: Analyzing trace with hash 536018836, now seen corresponding path program 1 times [2021-11-21 00:57:45,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:45,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325877354] [2021-11-21 00:57:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:45,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:57:45,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:45,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325877354] [2021-11-21 00:57:45,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325877354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:45,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:45,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:45,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046427544] [2021-11-21 00:57:45,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:45,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:45,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:45,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:45,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:45,723 INFO L87 Difference]: Start difference. First operand 243 states and 412 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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) [2021-11-21 00:57:45,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:45,901 INFO L93 Difference]: Finished difference Result 486 states and 824 transitions. [2021-11-21 00:57:45,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:45,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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 72 [2021-11-21 00:57:45,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:45,904 INFO L225 Difference]: With dead ends: 486 [2021-11-21 00:57:45,904 INFO L226 Difference]: Without dead ends: 245 [2021-11-21 00:57:45,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:45,906 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 110 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:45,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 83 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:57:45,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-21 00:57:45,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 243. [2021-11-21 00:57:45,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.6942148760330578) internal successors, (410), 242 states have internal predecessors, (410), 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) [2021-11-21 00:57:45,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 410 transitions. [2021-11-21 00:57:45,919 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 410 transitions. Word has length 72 [2021-11-21 00:57:45,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:45,919 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 410 transitions. [2021-11-21 00:57:45,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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) [2021-11-21 00:57:45,920 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 410 transitions. [2021-11-21 00:57:45,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-21 00:57:45,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:45,921 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:57:45,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:57:45,922 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:45,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:45,922 INFO L85 PathProgramCache]: Analyzing trace with hash -933935471, now seen corresponding path program 1 times [2021-11-21 00:57:45,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:45,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100583269] [2021-11-21 00:57:45,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:45,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 00:57:45,962 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:45,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100583269] [2021-11-21 00:57:45,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100583269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:45,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:45,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:45,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570738780] [2021-11-21 00:57:45,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:45,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:45,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:45,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:45,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:45,965 INFO L87 Difference]: Start difference. First operand 243 states and 410 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:57:46,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:46,082 INFO L93 Difference]: Finished difference Result 499 states and 842 transitions. [2021-11-21 00:57:46,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:46,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-21 00:57:46,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:46,084 INFO L225 Difference]: With dead ends: 499 [2021-11-21 00:57:46,084 INFO L226 Difference]: Without dead ends: 258 [2021-11-21 00:57:46,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:46,086 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 132 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:46,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 92 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:57:46,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-21 00:57:46,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2021-11-21 00:57:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.6784313725490196) internal successors, (428), 255 states have internal predecessors, (428), 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) [2021-11-21 00:57:46,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 428 transitions. [2021-11-21 00:57:46,097 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 428 transitions. Word has length 77 [2021-11-21 00:57:46,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:46,097 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 428 transitions. [2021-11-21 00:57:46,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:57:46,098 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 428 transitions. [2021-11-21 00:57:46,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-21 00:57:46,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:46,099 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:57:46,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:57:46,100 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:46,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:46,100 INFO L85 PathProgramCache]: Analyzing trace with hash 34397724, now seen corresponding path program 1 times [2021-11-21 00:57:46,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:46,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900793486] [2021-11-21 00:57:46,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:46,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 00:57:46,133 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:46,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900793486] [2021-11-21 00:57:46,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900793486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:46,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:46,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:46,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017643385] [2021-11-21 00:57:46,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:46,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:46,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:46,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:46,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:46,135 INFO L87 Difference]: Start difference. First operand 256 states and 428 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:57:46,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:46,270 INFO L93 Difference]: Finished difference Result 512 states and 856 transitions. [2021-11-21 00:57:46,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:46,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-21 00:57:46,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:46,275 INFO L225 Difference]: With dead ends: 512 [2021-11-21 00:57:46,275 INFO L226 Difference]: Without dead ends: 258 [2021-11-21 00:57:46,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:46,277 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 131 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:46,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 84 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:57:46,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-21 00:57:46,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2021-11-21 00:57:46,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.6627450980392158) internal successors, (424), 255 states have internal predecessors, (424), 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) [2021-11-21 00:57:46,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 424 transitions. [2021-11-21 00:57:46,291 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 424 transitions. Word has length 78 [2021-11-21 00:57:46,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:46,291 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 424 transitions. [2021-11-21 00:57:46,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:57:46,292 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 424 transitions. [2021-11-21 00:57:46,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-21 00:57:46,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:46,299 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:57:46,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:57:46,300 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:46,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:46,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1142443170, now seen corresponding path program 1 times [2021-11-21 00:57:46,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:46,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184754671] [2021-11-21 00:57:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:46,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-21 00:57:46,361 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:46,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184754671] [2021-11-21 00:57:46,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184754671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:46,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:46,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:46,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093580013] [2021-11-21 00:57:46,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:46,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:46,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:46,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:46,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:46,365 INFO L87 Difference]: Start difference. First operand 256 states and 424 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:57:46,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:46,484 INFO L93 Difference]: Finished difference Result 517 states and 855 transitions. [2021-11-21 00:57:46,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:46,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-21 00:57:46,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:46,487 INFO L225 Difference]: With dead ends: 517 [2021-11-21 00:57:46,487 INFO L226 Difference]: Without dead ends: 263 [2021-11-21 00:57:46,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:46,489 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 137 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:46,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 89 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:57:46,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-21 00:57:46,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-11-21 00:57:46,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.6297709923664123) internal successors, (427), 262 states have internal predecessors, (427), 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) [2021-11-21 00:57:46,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 427 transitions. [2021-11-21 00:57:46,500 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 427 transitions. Word has length 86 [2021-11-21 00:57:46,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:46,524 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 427 transitions. [2021-11-21 00:57:46,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:57:46,525 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 427 transitions. [2021-11-21 00:57:46,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-21 00:57:46,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:46,526 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:57:46,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:57:46,527 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:46,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:46,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1741013036, now seen corresponding path program 1 times [2021-11-21 00:57:46,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:46,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330643007] [2021-11-21 00:57:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:46,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 00:57:46,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:46,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330643007] [2021-11-21 00:57:46,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330643007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:46,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:46,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:46,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866433552] [2021-11-21 00:57:46,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:46,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:46,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:46,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:46,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:46,561 INFO L87 Difference]: Start difference. First operand 263 states and 427 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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) [2021-11-21 00:57:46,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:46,735 INFO L93 Difference]: Finished difference Result 553 states and 901 transitions. [2021-11-21 00:57:46,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:46,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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 91 [2021-11-21 00:57:46,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:46,738 INFO L225 Difference]: With dead ends: 553 [2021-11-21 00:57:46,738 INFO L226 Difference]: Without dead ends: 292 [2021-11-21 00:57:46,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:46,740 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 115 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:46,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 86 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:57:46,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-21 00:57:46,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 290. [2021-11-21 00:57:46,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.6262975778546713) internal successors, (470), 289 states have internal predecessors, (470), 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) [2021-11-21 00:57:46,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 470 transitions. [2021-11-21 00:57:46,754 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 470 transitions. Word has length 91 [2021-11-21 00:57:46,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:46,754 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 470 transitions. [2021-11-21 00:57:46,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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) [2021-11-21 00:57:46,755 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 470 transitions. [2021-11-21 00:57:46,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-21 00:57:46,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:46,756 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:57:46,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 00:57:46,757 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:46,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:46,757 INFO L85 PathProgramCache]: Analyzing trace with hash 75977855, now seen corresponding path program 1 times [2021-11-21 00:57:46,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:46,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884801505] [2021-11-21 00:57:46,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:46,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:46,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:46,798 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 00:57:46,799 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:46,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884801505] [2021-11-21 00:57:46,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884801505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:46,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:46,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:46,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728649424] [2021-11-21 00:57:46,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:46,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:46,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:46,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:46,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:46,803 INFO L87 Difference]: Start difference. First operand 290 states and 470 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 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) [2021-11-21 00:57:46,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:46,948 INFO L93 Difference]: Finished difference Result 580 states and 940 transitions. [2021-11-21 00:57:46,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:46,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 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 92 [2021-11-21 00:57:46,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:46,955 INFO L225 Difference]: With dead ends: 580 [2021-11-21 00:57:46,956 INFO L226 Difference]: Without dead ends: 292 [2021-11-21 00:57:46,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:46,957 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 114 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:46,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 86 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:57:46,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-21 00:57:46,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 290. [2021-11-21 00:57:46,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.6124567474048443) internal successors, (466), 289 states have internal predecessors, (466), 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) [2021-11-21 00:57:46,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 466 transitions. [2021-11-21 00:57:46,971 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 466 transitions. Word has length 92 [2021-11-21 00:57:46,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:46,972 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 466 transitions. [2021-11-21 00:57:46,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 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) [2021-11-21 00:57:46,972 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 466 transitions. [2021-11-21 00:57:46,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-21 00:57:46,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:46,974 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:57:46,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 00:57:46,974 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:46,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:46,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1053031995, now seen corresponding path program 1 times [2021-11-21 00:57:46,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:46,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926174697] [2021-11-21 00:57:46,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:46,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 00:57:47,004 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:47,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926174697] [2021-11-21 00:57:47,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926174697] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:47,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:47,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:47,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039153522] [2021-11-21 00:57:47,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:47,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:47,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:47,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:47,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:47,006 INFO L87 Difference]: Start difference. First operand 290 states and 466 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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) [2021-11-21 00:57:47,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:47,151 INFO L93 Difference]: Finished difference Result 611 states and 986 transitions. [2021-11-21 00:57:47,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:47,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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 93 [2021-11-21 00:57:47,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:47,154 INFO L225 Difference]: With dead ends: 611 [2021-11-21 00:57:47,154 INFO L226 Difference]: Without dead ends: 323 [2021-11-21 00:57:47,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:47,156 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 117 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:47,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 93 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:57:47,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-21 00:57:47,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 315. [2021-11-21 00:57:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.605095541401274) internal successors, (504), 314 states have internal predecessors, (504), 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) [2021-11-21 00:57:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 504 transitions. [2021-11-21 00:57:47,189 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 504 transitions. Word has length 93 [2021-11-21 00:57:47,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:47,189 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 504 transitions. [2021-11-21 00:57:47,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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) [2021-11-21 00:57:47,190 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 504 transitions. [2021-11-21 00:57:47,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-21 00:57:47,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:47,192 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:57:47,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 00:57:47,192 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:47,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:47,193 INFO L85 PathProgramCache]: Analyzing trace with hash -791770234, now seen corresponding path program 1 times [2021-11-21 00:57:47,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:47,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554785825] [2021-11-21 00:57:47,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:47,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 00:57:47,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:47,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554785825] [2021-11-21 00:57:47,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554785825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:47,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:47,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:47,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316356779] [2021-11-21 00:57:47,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:47,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:47,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:47,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:47,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:47,238 INFO L87 Difference]: Start difference. First operand 315 states and 504 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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) [2021-11-21 00:57:47,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:47,409 INFO L93 Difference]: Finished difference Result 636 states and 1019 transitions. [2021-11-21 00:57:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:47,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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 94 [2021-11-21 00:57:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:47,413 INFO L225 Difference]: With dead ends: 636 [2021-11-21 00:57:47,413 INFO L226 Difference]: Without dead ends: 323 [2021-11-21 00:57:47,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:47,414 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 116 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:47,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 93 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:57:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-21 00:57:47,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 315. [2021-11-21 00:57:47,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.589171974522293) internal successors, (499), 314 states have internal predecessors, (499), 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) [2021-11-21 00:57:47,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 499 transitions. [2021-11-21 00:57:47,433 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 499 transitions. Word has length 94 [2021-11-21 00:57:47,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:47,434 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 499 transitions. [2021-11-21 00:57:47,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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) [2021-11-21 00:57:47,434 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 499 transitions. [2021-11-21 00:57:47,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-21 00:57:47,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:47,436 INFO L514 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:57:47,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 00:57:47,436 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:47,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:47,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1355605581, now seen corresponding path program 1 times [2021-11-21 00:57:47,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:47,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933216332] [2021-11-21 00:57:47,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:47,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-21 00:57:47,469 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:47,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933216332] [2021-11-21 00:57:47,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933216332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:47,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:47,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:47,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798861596] [2021-11-21 00:57:47,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:47,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:47,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:47,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:47,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:47,471 INFO L87 Difference]: Start difference. First operand 315 states and 499 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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) [2021-11-21 00:57:47,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:47,617 INFO L93 Difference]: Finished difference Result 662 states and 1050 transitions. [2021-11-21 00:57:47,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:47,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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 101 [2021-11-21 00:57:47,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:47,619 INFO L225 Difference]: With dead ends: 662 [2021-11-21 00:57:47,620 INFO L226 Difference]: Without dead ends: 349 [2021-11-21 00:57:47,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:47,621 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 108 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:47,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 87 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:57:47,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-21 00:57:47,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 347. [2021-11-21 00:57:47,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.583815028901734) internal successors, (548), 346 states have internal predecessors, (548), 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) [2021-11-21 00:57:47,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 548 transitions. [2021-11-21 00:57:47,639 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 548 transitions. Word has length 101 [2021-11-21 00:57:47,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:47,639 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 548 transitions. [2021-11-21 00:57:47,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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) [2021-11-21 00:57:47,639 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 548 transitions. [2021-11-21 00:57:47,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-21 00:57:47,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:47,641 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:57:47,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 00:57:47,641 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:47,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:47,642 INFO L85 PathProgramCache]: Analyzing trace with hash -2078721159, now seen corresponding path program 1 times [2021-11-21 00:57:47,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:47,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151145947] [2021-11-21 00:57:47,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:47,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-21 00:57:47,669 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:47,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151145947] [2021-11-21 00:57:47,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151145947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:47,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:47,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:47,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423913458] [2021-11-21 00:57:47,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:47,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:47,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:47,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:47,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:47,671 INFO L87 Difference]: Start difference. First operand 347 states and 548 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:57:47,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:47,822 INFO L93 Difference]: Finished difference Result 694 states and 1096 transitions. [2021-11-21 00:57:47,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:47,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-21 00:57:47,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:47,825 INFO L225 Difference]: With dead ends: 694 [2021-11-21 00:57:47,826 INFO L226 Difference]: Without dead ends: 349 [2021-11-21 00:57:47,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:47,827 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 107 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:47,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 87 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:57:47,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-21 00:57:47,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 347. [2021-11-21 00:57:47,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.5751445086705202) internal successors, (545), 346 states have internal predecessors, (545), 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) [2021-11-21 00:57:47,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 545 transitions. [2021-11-21 00:57:47,872 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 545 transitions. Word has length 102 [2021-11-21 00:57:47,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:47,872 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 545 transitions. [2021-11-21 00:57:47,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:57:47,873 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 545 transitions. [2021-11-21 00:57:47,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-21 00:57:47,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:47,874 INFO L514 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, 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] [2021-11-21 00:57:47,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 00:57:47,875 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:47,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:47,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1984418856, now seen corresponding path program 1 times [2021-11-21 00:57:47,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:47,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932319965] [2021-11-21 00:57:47,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:47,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 00:57:47,904 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:47,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932319965] [2021-11-21 00:57:47,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932319965] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:47,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:47,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:47,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547615558] [2021-11-21 00:57:47,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:47,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:47,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:47,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:47,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:47,906 INFO L87 Difference]: Start difference. First operand 347 states and 545 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2021-11-21 00:57:48,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:48,079 INFO L93 Difference]: Finished difference Result 734 states and 1152 transitions. [2021-11-21 00:57:48,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:48,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 104 [2021-11-21 00:57:48,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:48,082 INFO L225 Difference]: With dead ends: 734 [2021-11-21 00:57:48,082 INFO L226 Difference]: Without dead ends: 389 [2021-11-21 00:57:48,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:48,086 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 95 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:48,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 92 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:57:48,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-21 00:57:48,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 387. [2021-11-21 00:57:48,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.5699481865284974) internal successors, (606), 386 states have internal predecessors, (606), 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) [2021-11-21 00:57:48,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 606 transitions. [2021-11-21 00:57:48,110 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 606 transitions. Word has length 104 [2021-11-21 00:57:48,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:48,110 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 606 transitions. [2021-11-21 00:57:48,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2021-11-21 00:57:48,110 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 606 transitions. [2021-11-21 00:57:48,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-21 00:57:48,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:48,112 INFO L514 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, 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] [2021-11-21 00:57:48,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 00:57:48,113 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:48,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:48,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1426144978, now seen corresponding path program 1 times [2021-11-21 00:57:48,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:48,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165632696] [2021-11-21 00:57:48,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:48,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 00:57:48,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:48,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165632696] [2021-11-21 00:57:48,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165632696] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:48,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:48,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:48,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590412054] [2021-11-21 00:57:48,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:48,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:48,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:48,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:48,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:48,164 INFO L87 Difference]: Start difference. First operand 387 states and 606 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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) [2021-11-21 00:57:48,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:48,345 INFO L93 Difference]: Finished difference Result 778 states and 1219 transitions. [2021-11-21 00:57:48,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:48,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-21 00:57:48,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:48,348 INFO L225 Difference]: With dead ends: 778 [2021-11-21 00:57:48,349 INFO L226 Difference]: Without dead ends: 391 [2021-11-21 00:57:48,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:48,351 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 95 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:48,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 91 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:57:48,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-21 00:57:48,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 389. [2021-11-21 00:57:48,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.5695876288659794) internal successors, (609), 388 states have internal predecessors, (609), 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) [2021-11-21 00:57:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 609 transitions. [2021-11-21 00:57:48,372 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 609 transitions. Word has length 105 [2021-11-21 00:57:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:48,373 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 609 transitions. [2021-11-21 00:57:48,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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) [2021-11-21 00:57:48,373 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 609 transitions. [2021-11-21 00:57:48,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-21 00:57:48,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:48,375 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:57:48,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 00:57:48,376 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:48,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:48,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1897710457, now seen corresponding path program 1 times [2021-11-21 00:57:48,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:48,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600692639] [2021-11-21 00:57:48,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:48,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-21 00:57:48,410 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:48,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600692639] [2021-11-21 00:57:48,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600692639] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:48,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:48,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:48,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234761673] [2021-11-21 00:57:48,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:48,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:48,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:48,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:48,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:48,413 INFO L87 Difference]: Start difference. First operand 389 states and 609 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:57:48,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:48,569 INFO L93 Difference]: Finished difference Result 809 states and 1271 transitions. [2021-11-21 00:57:48,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:48,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-21 00:57:48,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:48,573 INFO L225 Difference]: With dead ends: 809 [2021-11-21 00:57:48,573 INFO L226 Difference]: Without dead ends: 422 [2021-11-21 00:57:48,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:48,574 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 119 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:48,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 97 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:57:48,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-11-21 00:57:48,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2021-11-21 00:57:48,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.5571776155717763) internal successors, (640), 411 states have internal predecessors, (640), 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) [2021-11-21 00:57:48,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 640 transitions. [2021-11-21 00:57:48,620 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 640 transitions. Word has length 117 [2021-11-21 00:57:48,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:48,621 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 640 transitions. [2021-11-21 00:57:48,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:57:48,621 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 640 transitions. [2021-11-21 00:57:48,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-21 00:57:48,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:48,623 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:57:48,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 00:57:48,623 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:48,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:48,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1526933454, now seen corresponding path program 1 times [2021-11-21 00:57:48,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:48,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026428895] [2021-11-21 00:57:48,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:48,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-21 00:57:48,657 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:48,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026428895] [2021-11-21 00:57:48,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026428895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:48,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:48,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:48,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497564408] [2021-11-21 00:57:48,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:48,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:48,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:48,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:48,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:48,660 INFO L87 Difference]: Start difference. First operand 412 states and 640 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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) [2021-11-21 00:57:48,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:48,813 INFO L93 Difference]: Finished difference Result 832 states and 1294 transitions. [2021-11-21 00:57:48,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:48,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 118 [2021-11-21 00:57:48,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:48,816 INFO L225 Difference]: With dead ends: 832 [2021-11-21 00:57:48,816 INFO L226 Difference]: Without dead ends: 422 [2021-11-21 00:57:48,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:48,820 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 118 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:48,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 97 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:57:48,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-11-21 00:57:48,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2021-11-21 00:57:48,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.5377128953771289) internal successors, (632), 411 states have internal predecessors, (632), 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) [2021-11-21 00:57:48,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 632 transitions. [2021-11-21 00:57:48,848 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 632 transitions. Word has length 118 [2021-11-21 00:57:48,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:48,848 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 632 transitions. [2021-11-21 00:57:48,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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) [2021-11-21 00:57:48,849 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 632 transitions. [2021-11-21 00:57:48,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-21 00:57:48,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:48,851 INFO L514 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, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:57:48,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-21 00:57:48,851 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:48,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:48,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1924853529, now seen corresponding path program 1 times [2021-11-21 00:57:48,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:48,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615815417] [2021-11-21 00:57:48,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:48,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-21 00:57:48,892 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:48,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615815417] [2021-11-21 00:57:48,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615815417] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:48,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:48,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:48,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329904853] [2021-11-21 00:57:48,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:48,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:48,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:48,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:48,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:48,896 INFO L87 Difference]: Start difference. First operand 412 states and 632 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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) [2021-11-21 00:57:49,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:49,058 INFO L93 Difference]: Finished difference Result 826 states and 1267 transitions. [2021-11-21 00:57:49,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:49,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 131 [2021-11-21 00:57:49,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:49,061 INFO L225 Difference]: With dead ends: 826 [2021-11-21 00:57:49,062 INFO L226 Difference]: Without dead ends: 416 [2021-11-21 00:57:49,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:49,065 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 109 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:49,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 89 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:57:49,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-11-21 00:57:49,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 412. [2021-11-21 00:57:49,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.5255474452554745) internal successors, (627), 411 states have internal predecessors, (627), 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) [2021-11-21 00:57:49,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 627 transitions. [2021-11-21 00:57:49,090 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 627 transitions. Word has length 131 [2021-11-21 00:57:49,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:49,090 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 627 transitions. [2021-11-21 00:57:49,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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) [2021-11-21 00:57:49,090 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 627 transitions. [2021-11-21 00:57:49,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-21 00:57:49,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:49,092 INFO L514 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, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:57:49,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-21 00:57:49,093 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:49,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:49,093 INFO L85 PathProgramCache]: Analyzing trace with hash 2119214847, now seen corresponding path program 1 times [2021-11-21 00:57:49,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:49,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100324378] [2021-11-21 00:57:49,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:49,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-21 00:57:49,129 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:49,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100324378] [2021-11-21 00:57:49,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100324378] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:49,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:49,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:49,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164406861] [2021-11-21 00:57:49,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:49,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:49,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:49,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:49,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:49,132 INFO L87 Difference]: Start difference. First operand 412 states and 627 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:57:49,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:49,309 INFO L93 Difference]: Finished difference Result 826 states and 1257 transitions. [2021-11-21 00:57:49,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:49,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-21 00:57:49,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:49,312 INFO L225 Difference]: With dead ends: 826 [2021-11-21 00:57:49,313 INFO L226 Difference]: Without dead ends: 416 [2021-11-21 00:57:49,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:49,314 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 107 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:49,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 90 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:57:49,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-11-21 00:57:49,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 412. [2021-11-21 00:57:49,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.5133819951338199) internal successors, (622), 411 states have internal predecessors, (622), 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) [2021-11-21 00:57:49,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 622 transitions. [2021-11-21 00:57:49,367 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 622 transitions. Word has length 132 [2021-11-21 00:57:49,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:49,367 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 622 transitions. [2021-11-21 00:57:49,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:57:49,367 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 622 transitions. [2021-11-21 00:57:49,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-21 00:57:49,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:49,369 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:57:49,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-21 00:57:49,369 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:49,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:49,370 INFO L85 PathProgramCache]: Analyzing trace with hash -354036322, now seen corresponding path program 1 times [2021-11-21 00:57:49,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:49,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889410245] [2021-11-21 00:57:49,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:49,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-21 00:57:49,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:49,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889410245] [2021-11-21 00:57:49,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889410245] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:49,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:49,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:49,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259653686] [2021-11-21 00:57:49,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:49,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:49,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:49,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:49,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:49,398 INFO L87 Difference]: Start difference. First operand 412 states and 622 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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) [2021-11-21 00:57:49,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:49,531 INFO L93 Difference]: Finished difference Result 847 states and 1282 transitions. [2021-11-21 00:57:49,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:49,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 137 [2021-11-21 00:57:49,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:49,535 INFO L225 Difference]: With dead ends: 847 [2021-11-21 00:57:49,535 INFO L226 Difference]: Without dead ends: 437 [2021-11-21 00:57:49,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:49,536 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 121 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:49,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 88 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:57:49,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-11-21 00:57:49,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 433. [2021-11-21 00:57:49,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.5) internal successors, (648), 432 states have internal predecessors, (648), 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) [2021-11-21 00:57:49,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 648 transitions. [2021-11-21 00:57:49,565 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 648 transitions. Word has length 137 [2021-11-21 00:57:49,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:49,566 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 648 transitions. [2021-11-21 00:57:49,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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) [2021-11-21 00:57:49,566 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 648 transitions. [2021-11-21 00:57:49,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-21 00:57:49,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:49,568 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:57:49,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-21 00:57:49,569 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:49,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:49,569 INFO L85 PathProgramCache]: Analyzing trace with hash -483416791, now seen corresponding path program 1 times [2021-11-21 00:57:49,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:49,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297100025] [2021-11-21 00:57:49,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:49,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-21 00:57:49,606 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:49,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297100025] [2021-11-21 00:57:49,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297100025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:49,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:49,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:49,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455440735] [2021-11-21 00:57:49,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:49,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:49,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:49,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:49,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:49,609 INFO L87 Difference]: Start difference. First operand 433 states and 648 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:57:49,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:49,752 INFO L93 Difference]: Finished difference Result 868 states and 1299 transitions. [2021-11-21 00:57:49,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:49,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-21 00:57:49,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:49,756 INFO L225 Difference]: With dead ends: 868 [2021-11-21 00:57:49,756 INFO L226 Difference]: Without dead ends: 437 [2021-11-21 00:57:49,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:49,759 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 120 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:49,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 88 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:57:49,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-11-21 00:57:49,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 433. [2021-11-21 00:57:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.4791666666666667) internal successors, (639), 432 states have internal predecessors, (639), 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) [2021-11-21 00:57:49,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 639 transitions. [2021-11-21 00:57:49,786 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 639 transitions. Word has length 138 [2021-11-21 00:57:49,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:49,787 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 639 transitions. [2021-11-21 00:57:49,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:57:49,787 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 639 transitions. [2021-11-21 00:57:49,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-21 00:57:49,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:49,789 INFO L514 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:57:49,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-21 00:57:49,790 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:49,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:49,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1842792668, now seen corresponding path program 1 times [2021-11-21 00:57:49,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:49,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950194992] [2021-11-21 00:57:49,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:49,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-21 00:57:49,826 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:49,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950194992] [2021-11-21 00:57:49,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950194992] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:49,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:49,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:49,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291520134] [2021-11-21 00:57:49,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:49,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:49,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:49,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:49,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:49,830 INFO L87 Difference]: Start difference. First operand 433 states and 639 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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) [2021-11-21 00:57:49,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:49,989 INFO L93 Difference]: Finished difference Result 905 states and 1331 transitions. [2021-11-21 00:57:49,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:49,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 142 [2021-11-21 00:57:49,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:49,993 INFO L225 Difference]: With dead ends: 905 [2021-11-21 00:57:49,993 INFO L226 Difference]: Without dead ends: 474 [2021-11-21 00:57:49,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:49,994 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 91 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:49,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 99 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:57:50,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-21 00:57:50,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 471. [2021-11-21 00:57:50,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.4659574468085106) internal successors, (689), 470 states have internal predecessors, (689), 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) [2021-11-21 00:57:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 689 transitions. [2021-11-21 00:57:50,052 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 689 transitions. Word has length 142 [2021-11-21 00:57:50,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:50,052 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 689 transitions. [2021-11-21 00:57:50,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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) [2021-11-21 00:57:50,053 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 689 transitions. [2021-11-21 00:57:50,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-21 00:57:50,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:50,056 INFO L514 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:57:50,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-21 00:57:50,056 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:50,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:50,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1142712394, now seen corresponding path program 1 times [2021-11-21 00:57:50,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:50,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016663059] [2021-11-21 00:57:50,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:50,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-21 00:57:50,102 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:50,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016663059] [2021-11-21 00:57:50,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016663059] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:50,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:50,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:50,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330403185] [2021-11-21 00:57:50,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:50,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:50,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:50,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:50,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:50,107 INFO L87 Difference]: Start difference. First operand 471 states and 689 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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) [2021-11-21 00:57:50,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:50,280 INFO L93 Difference]: Finished difference Result 943 states and 1379 transitions. [2021-11-21 00:57:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:50,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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 [2021-11-21 00:57:50,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:50,283 INFO L225 Difference]: With dead ends: 943 [2021-11-21 00:57:50,284 INFO L226 Difference]: Without dead ends: 455 [2021-11-21 00:57:50,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:50,286 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 91 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:50,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 98 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:57:50,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-11-21 00:57:50,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 452. [2021-11-21 00:57:50,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.4634146341463414) internal successors, (660), 451 states have internal predecessors, (660), 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) [2021-11-21 00:57:50,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 660 transitions. [2021-11-21 00:57:50,315 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 660 transitions. Word has length 143 [2021-11-21 00:57:50,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:50,315 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 660 transitions. [2021-11-21 00:57:50,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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) [2021-11-21 00:57:50,316 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 660 transitions. [2021-11-21 00:57:50,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-21 00:57:50,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:50,318 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:57:50,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-21 00:57:50,319 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:50,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:50,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1290659781, now seen corresponding path program 1 times [2021-11-21 00:57:50,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:50,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315711472] [2021-11-21 00:57:50,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:50,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-21 00:57:50,360 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:50,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315711472] [2021-11-21 00:57:50,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315711472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:50,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:50,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:50,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779469145] [2021-11-21 00:57:50,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:50,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:50,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:50,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:50,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:50,362 INFO L87 Difference]: Start difference. First operand 452 states and 660 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:57:50,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:50,504 INFO L93 Difference]: Finished difference Result 923 states and 1351 transitions. [2021-11-21 00:57:50,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:50,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-21 00:57:50,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:50,507 INFO L225 Difference]: With dead ends: 923 [2021-11-21 00:57:50,508 INFO L226 Difference]: Without dead ends: 473 [2021-11-21 00:57:50,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:50,514 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 123 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:50,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 85 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:57:50,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-11-21 00:57:50,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 471. [2021-11-21 00:57:50,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.446808510638298) internal successors, (680), 470 states have internal predecessors, (680), 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) [2021-11-21 00:57:50,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 680 transitions. [2021-11-21 00:57:50,551 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 680 transitions. Word has length 154 [2021-11-21 00:57:50,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:50,551 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 680 transitions. [2021-11-21 00:57:50,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:57:50,552 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 680 transitions. [2021-11-21 00:57:50,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-21 00:57:50,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:50,554 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:57:50,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-21 00:57:50,555 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:50,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:50,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1348125520, now seen corresponding path program 1 times [2021-11-21 00:57:50,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:50,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981144454] [2021-11-21 00:57:50,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:50,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-21 00:57:50,598 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:50,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981144454] [2021-11-21 00:57:50,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981144454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:57:50,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:57:50,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:57:50,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145348379] [2021-11-21 00:57:50,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:57:50,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:57:50,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:50,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:57:50,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:50,601 INFO L87 Difference]: Start difference. First operand 471 states and 680 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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) [2021-11-21 00:57:50,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:57:50,743 INFO L93 Difference]: Finished difference Result 942 states and 1360 transitions. [2021-11-21 00:57:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:57:50,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 155 [2021-11-21 00:57:50,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:57:50,747 INFO L225 Difference]: With dead ends: 942 [2021-11-21 00:57:50,747 INFO L226 Difference]: Without dead ends: 471 [2021-11-21 00:57:50,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:57:50,749 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 122 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:57:50,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 85 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:57:50,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-11-21 00:57:50,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2021-11-21 00:57:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.4230769230769231) internal successors, (666), 468 states have internal predecessors, (666), 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) [2021-11-21 00:57:50,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 666 transitions. [2021-11-21 00:57:50,809 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 666 transitions. Word has length 155 [2021-11-21 00:57:50,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:57:50,809 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 666 transitions. [2021-11-21 00:57:50,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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) [2021-11-21 00:57:50,810 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 666 transitions. [2021-11-21 00:57:50,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-21 00:57:50,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:57:50,813 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:57:50,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-21 00:57:50,813 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:57:50,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:57:50,814 INFO L85 PathProgramCache]: Analyzing trace with hash -2100832630, now seen corresponding path program 1 times [2021-11-21 00:57:50,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:57:50,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308191660] [2021-11-21 00:57:50,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:50,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:57:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 164 proven. 25 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-21 00:57:50,870 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:57:50,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308191660] [2021-11-21 00:57:50,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308191660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:57:50,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860700507] [2021-11-21 00:57:50,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:57:50,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:57:50,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:57:50,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:57:50,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:57:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:51,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:57:51,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:57:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 164 proven. 25 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-21 00:57:51,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:57:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 164 proven. 25 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-21 00:57:51,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860700507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:57:51,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1759891254] [2021-11-21 00:57:51,739 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2021-11-21 00:57:51,739 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:57:51,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:57:51,749 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:57:51,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:02:00,104 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:02:25,415 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:02:25,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:02:25,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-11-21 01:02:25,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631648552] [2021-11-21 01:02:25,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:02:25,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:02:25,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:25,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:02:25,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=695, Invalid=3087, Unknown=0, NotChecked=0, Total=3782 [2021-11-21 01:02:25,419 INFO L87 Difference]: Start difference. First operand 469 states and 666 transitions. Second operand has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 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) [2021-11-21 01:02:25,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:25,938 INFO L93 Difference]: Finished difference Result 1403 states and 1987 transitions. [2021-11-21 01:02:25,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:02:25,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 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 168 [2021-11-21 01:02:25,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:25,944 INFO L225 Difference]: With dead ends: 1403 [2021-11-21 01:02:25,944 INFO L226 Difference]: Without dead ends: 925 [2021-11-21 01:02:25,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 441 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=707, Invalid=3325, Unknown=0, NotChecked=0, Total=4032 [2021-11-21 01:02:25,948 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 339 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:25,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 473 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:02:25,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-11-21 01:02:25,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 531. [2021-11-21 01:02:25,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.4) internal successors, (742), 530 states have internal predecessors, (742), 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) [2021-11-21 01:02:25,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 742 transitions. [2021-11-21 01:02:25,984 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 742 transitions. Word has length 168 [2021-11-21 01:02:25,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:25,985 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 742 transitions. [2021-11-21 01:02:25,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 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) [2021-11-21 01:02:25,985 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 742 transitions. [2021-11-21 01:02:25,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-21 01:02:25,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:25,988 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:02:26,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:26,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:26,204 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:02:26,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:26,204 INFO L85 PathProgramCache]: Analyzing trace with hash 99384176, now seen corresponding path program 1 times [2021-11-21 01:02:26,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:26,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131444637] [2021-11-21 01:02:26,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:26,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 258 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 01:02:26,347 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:26,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131444637] [2021-11-21 01:02:26,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131444637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:02:26,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656853693] [2021-11-21 01:02:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:26,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:26,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:26,349 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:26,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:02:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:26,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:02:26,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-21 01:02:26,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 223 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-21 01:02:27,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656853693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:27,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [501174080] [2021-11-21 01:02:27,722 INFO L159 IcfgInterpreter]: Started Sifa with 58 locations of interest [2021-11-21 01:02:27,723 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:02:27,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:02:27,723 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:02:27,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:06:31,651 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:06:54,390 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:06:54,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:06:54,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 11 [2021-11-21 01:06:54,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873472800] [2021-11-21 01:06:54,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:06:54,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:06:54,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:06:54,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:06:54,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=562, Invalid=3220, Unknown=0, NotChecked=0, Total=3782 [2021-11-21 01:06:54,394 INFO L87 Difference]: Start difference. First operand 531 states and 742 transitions. Second operand has 12 states, 12 states have (on average 24.25) internal successors, (291), 11 states have internal predecessors, (291), 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) [2021-11-21 01:06:54,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:54,810 INFO L93 Difference]: Finished difference Result 2989 states and 4156 transitions. [2021-11-21 01:06:54,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:06:54,811 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 24.25) internal successors, (291), 11 states have internal predecessors, (291), 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 173 [2021-11-21 01:06:54,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:54,832 INFO L225 Difference]: With dead ends: 2989 [2021-11-21 01:06:54,833 INFO L226 Difference]: Without dead ends: 2460 [2021-11-21 01:06:54,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 449 SyntacticMatches, 17 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2091 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=562, Invalid=3220, Unknown=0, NotChecked=0, Total=3782 [2021-11-21 01:06:54,836 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 782 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:54,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 1262 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:06:54,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-11-21 01:06:54,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 1972. [2021-11-21 01:06:54,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1972 states, 1971 states have (on average 1.393708777270421) internal successors, (2747), 1971 states have internal predecessors, (2747), 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) [2021-11-21 01:06:54,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1972 states to 1972 states and 2747 transitions. [2021-11-21 01:06:54,961 INFO L78 Accepts]: Start accepts. Automaton has 1972 states and 2747 transitions. Word has length 173 [2021-11-21 01:06:54,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:54,961 INFO L470 AbstractCegarLoop]: Abstraction has 1972 states and 2747 transitions. [2021-11-21 01:06:54,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.25) internal successors, (291), 11 states have internal predecessors, (291), 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) [2021-11-21 01:06:54,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1972 states and 2747 transitions. [2021-11-21 01:06:54,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-11-21 01:06:54,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:54,972 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 11, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 4, 4, 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] [2021-11-21 01:06:55,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:55,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-21 01:06:55,188 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:55,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:55,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1620845868, now seen corresponding path program 1 times [2021-11-21 01:06:55,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:06:55,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329581796] [2021-11-21 01:06:55,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:55,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:06:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1509 backedges. 522 proven. 0 refuted. 0 times theorem prover too weak. 987 trivial. 0 not checked. [2021-11-21 01:06:55,269 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:06:55,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329581796] [2021-11-21 01:06:55,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329581796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:06:55,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:06:55,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:06:55,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663642032] [2021-11-21 01:06:55,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:06:55,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:06:55,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:06:55,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:06:55,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:06:55,271 INFO L87 Difference]: Start difference. First operand 1972 states and 2747 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:06:55,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:55,535 INFO L93 Difference]: Finished difference Result 3974 states and 5528 transitions. [2021-11-21 01:06:55,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:06:55,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 366 [2021-11-21 01:06:55,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:55,547 INFO L225 Difference]: With dead ends: 3974 [2021-11-21 01:06:55,547 INFO L226 Difference]: Without dead ends: 2004 [2021-11-21 01:06:55,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:06:55,551 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 88 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:55,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 171 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:06:55,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2021-11-21 01:06:55,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 1965. [2021-11-21 01:06:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 1.309572301425662) internal successors, (2572), 1964 states have internal predecessors, (2572), 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) [2021-11-21 01:06:55,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2572 transitions. [2021-11-21 01:06:55,669 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2572 transitions. Word has length 366 [2021-11-21 01:06:55,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:55,670 INFO L470 AbstractCegarLoop]: Abstraction has 1965 states and 2572 transitions. [2021-11-21 01:06:55,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:06:55,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2572 transitions. [2021-11-21 01:06:55,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-11-21 01:06:55,675 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:55,676 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 7, 6, 6, 5, 5, 4, 4, 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] [2021-11-21 01:06:55,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-21 01:06:55,676 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:55,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:55,677 INFO L85 PathProgramCache]: Analyzing trace with hash -508902094, now seen corresponding path program 1 times [2021-11-21 01:06:55,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:06:55,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5517624] [2021-11-21 01:06:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:55,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:06:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1868 backedges. 880 proven. 787 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-21 01:06:55,874 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:06:55,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5517624] [2021-11-21 01:06:55,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5517624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:06:55,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744250347] [2021-11-21 01:06:55,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:55,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:06:55,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:06:55,880 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:06:55,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:06:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:56,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:06:56,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1868 backedges. 880 proven. 787 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-21 01:06:56,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1868 backedges. 1667 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-21 01:06:59,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744250347] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:06:59,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:06:59,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11, 11] total 20 [2021-11-21 01:06:59,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486923418] [2021-11-21 01:06:59,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:06:59,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:06:59,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:06:59,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:06:59,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:06:59,993 INFO L87 Difference]: Start difference. First operand 1965 states and 2572 transitions. Second operand has 12 states, 12 states have (on average 24.0) internal successors, (288), 11 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) [2021-11-21 01:07:00,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:00,615 INFO L93 Difference]: Finished difference Result 6086 states and 7992 transitions. [2021-11-21 01:07:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:07:00,616 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 24.0) internal successors, (288), 11 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) Word has length 402 [2021-11-21 01:07:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:00,641 INFO L225 Difference]: With dead ends: 6086 [2021-11-21 01:07:00,641 INFO L226 Difference]: Without dead ends: 4649 [2021-11-21 01:07:00,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 813 GetRequests, 794 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:07:00,645 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 1057 mSDsluCounter, 1584 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 2171 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:00,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 2171 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:07:00,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2021-11-21 01:07:00,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 4010. [2021-11-21 01:07:00,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4010 states, 4009 states have (on average 1.3135445248191568) internal successors, (5266), 4009 states have internal predecessors, (5266), 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) [2021-11-21 01:07:00,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4010 states to 4010 states and 5266 transitions. [2021-11-21 01:07:00,892 INFO L78 Accepts]: Start accepts. Automaton has 4010 states and 5266 transitions. Word has length 402 [2021-11-21 01:07:00,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:00,893 INFO L470 AbstractCegarLoop]: Abstraction has 4010 states and 5266 transitions. [2021-11-21 01:07:00,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.0) internal successors, (288), 11 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) [2021-11-21 01:07:00,894 INFO L276 IsEmpty]: Start isEmpty. Operand 4010 states and 5266 transitions. [2021-11-21 01:07:00,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2021-11-21 01:07:00,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:00,905 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-21 01:07:00,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:07:01,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:07:01,124 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:01,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:01,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2113399027, now seen corresponding path program 1 times [2021-11-21 01:07:01,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:01,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240463689] [2021-11-21 01:07:01,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:01,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3405 backedges. 1817 proven. 521 refuted. 0 times theorem prover too weak. 1067 trivial. 0 not checked. [2021-11-21 01:07:01,280 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:01,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240463689] [2021-11-21 01:07:01,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240463689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:07:01,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622770331] [2021-11-21 01:07:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:01,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:07:01,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:07:01,297 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:07:01,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:07:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:01,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:07:01,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:07:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3405 backedges. 2245 proven. 148 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2021-11-21 01:07:02,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:07:03,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3405 backedges. 2393 proven. 0 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2021-11-21 01:07:03,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622770331] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:07:03,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:07:03,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2021-11-21 01:07:03,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447456504] [2021-11-21 01:07:03,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:03,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:07:03,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:03,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:07:03,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:07:03,579 INFO L87 Difference]: Start difference. First operand 4010 states and 5266 transitions. Second operand has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 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) [2021-11-21 01:07:03,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:03,964 INFO L93 Difference]: Finished difference Result 6772 states and 8851 transitions. [2021-11-21 01:07:03,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:07:03,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 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 540 [2021-11-21 01:07:03,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:03,990 INFO L225 Difference]: With dead ends: 6772 [2021-11-21 01:07:03,990 INFO L226 Difference]: Without dead ends: 5335 [2021-11-21 01:07:03,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1084 GetRequests, 1075 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:07:03,994 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 346 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:03,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 941 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:07:04,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5335 states. [2021-11-21 01:07:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5335 to 4915. [2021-11-21 01:07:04,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4915 states, 4914 states have (on average 1.30993080993081) internal successors, (6437), 4914 states have internal predecessors, (6437), 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) [2021-11-21 01:07:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4915 states to 4915 states and 6437 transitions. [2021-11-21 01:07:04,337 INFO L78 Accepts]: Start accepts. Automaton has 4915 states and 6437 transitions. Word has length 540 [2021-11-21 01:07:04,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:04,338 INFO L470 AbstractCegarLoop]: Abstraction has 4915 states and 6437 transitions. [2021-11-21 01:07:04,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 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) [2021-11-21 01:07:04,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4915 states and 6437 transitions. [2021-11-21 01:07:04,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2021-11-21 01:07:04,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:04,358 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 20, 20, 19, 19, 18, 18, 17, 17, 17, 17, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:04,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:07:04,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:07:04,574 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:04,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:04,574 INFO L85 PathProgramCache]: Analyzing trace with hash 810799420, now seen corresponding path program 1 times [2021-11-21 01:07:04,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:04,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520127699] [2021-11-21 01:07:04,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:04,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5428 backedges. 3179 proven. 521 refuted. 0 times theorem prover too weak. 1728 trivial. 0 not checked. [2021-11-21 01:07:04,769 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:04,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520127699] [2021-11-21 01:07:04,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520127699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:07:04,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907601415] [2021-11-21 01:07:04,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:04,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:07:04,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:07:04,771 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:07:04,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:07:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:04,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:07:04,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:07:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5428 backedges. 3216 proven. 148 refuted. 0 times theorem prover too weak. 2064 trivial. 0 not checked. [2021-11-21 01:07:05,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:07:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5428 backedges. 3364 proven. 0 refuted. 0 times theorem prover too weak. 2064 trivial. 0 not checked. [2021-11-21 01:07:07,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907601415] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:07:07,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:07:07,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 5] total 12 [2021-11-21 01:07:07,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073813727] [2021-11-21 01:07:07,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:07,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:07:07,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:07,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:07:07,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:07:07,751 INFO L87 Difference]: Start difference. First operand 4915 states and 6437 transitions. Second operand has 6 states, 6 states have (on average 43.5) internal successors, (261), 6 states have internal predecessors, (261), 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) [2021-11-21 01:07:08,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:08,101 INFO L93 Difference]: Finished difference Result 9003 states and 11722 transitions. [2021-11-21 01:07:08,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:07:08,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 43.5) internal successors, (261), 6 states have internal predecessors, (261), 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 679 [2021-11-21 01:07:08,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:08,126 INFO L225 Difference]: With dead ends: 9003 [2021-11-21 01:07:08,126 INFO L226 Difference]: Without dead ends: 6661 [2021-11-21 01:07:08,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1362 GetRequests, 1352 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:07:08,162 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 383 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:08,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 1111 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:07:08,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6661 states. [2021-11-21 01:07:08,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6661 to 5821. [2021-11-21 01:07:08,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 1.3077319587628866) internal successors, (7611), 5820 states have internal predecessors, (7611), 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) [2021-11-21 01:07:08,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 7611 transitions. [2021-11-21 01:07:08,502 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 7611 transitions. Word has length 679 [2021-11-21 01:07:08,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:08,504 INFO L470 AbstractCegarLoop]: Abstraction has 5821 states and 7611 transitions. [2021-11-21 01:07:08,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 43.5) internal successors, (261), 6 states have internal predecessors, (261), 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) [2021-11-21 01:07:08,504 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 7611 transitions. [2021-11-21 01:07:08,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2021-11-21 01:07:08,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:08,521 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 25, 25, 25, 25, 25, 24, 24, 23, 23, 22, 22, 21, 21, 21, 21, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-21 01:07:08,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:07:08,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:07:08,748 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:08,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:08,748 INFO L85 PathProgramCache]: Analyzing trace with hash 4716508, now seen corresponding path program 1 times [2021-11-21 01:07:08,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:08,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839595585] [2021-11-21 01:07:08,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:08,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:09,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7938 backedges. 4541 proven. 521 refuted. 0 times theorem prover too weak. 2876 trivial. 0 not checked. [2021-11-21 01:07:09,039 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:09,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839595585] [2021-11-21 01:07:09,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839595585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:07:09,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581604938] [2021-11-21 01:07:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:09,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:07:09,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:07:09,044 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:07:09,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53dacdcf-7076-498d-8d74-f1db55d2c3ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:07:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:09,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:07:09,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:07:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7938 backedges. 4450 proven. 691 refuted. 0 times theorem prover too weak. 2797 trivial. 0 not checked. [2021-11-21 01:07:10,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:07:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7938 backedges. 4558 proven. 583 refuted. 0 times theorem prover too weak. 2797 trivial. 0 not checked. [2021-11-21 01:07:12,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581604938] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:07:12,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1150143568] [2021-11-21 01:07:12,049 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2021-11-21 01:07:12,049 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:07:12,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:07:12,050 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:07:12,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs