./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.10.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3c94c2-f60a-4e2b-bd9c-7f06db2ec781/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3c94c2-f60a-4e2b-bd9c-7f06db2ec781/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3c94c2-f60a-4e2b-bd9c-7f06db2ec781/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3c94c2-f60a-4e2b-bd9c-7f06db2ec781/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.10.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3c94c2-f60a-4e2b-bd9c-7f06db2ec781/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3c94c2-f60a-4e2b-bd9c-7f06db2ec781/bin/utaipan-eEHZpOm5b7 --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 c68befe0cb772d649d152823cc17c89d77797d55cc04257d4beaaad2b518a7a0 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:59:44,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:59:44,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:59:44,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:59:44,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:59:44,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:59:44,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:59:44,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:59:44,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:59:44,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:59:44,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:59:44,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:59:44,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:59:44,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:59:44,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:59:44,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:59:44,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:59:44,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:59:44,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:59:44,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:59:44,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:59:44,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:59:44,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:59:44,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:59:44,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:59:44,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:59:44,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:59:44,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:59:44,444 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:59:44,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:59:44,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:59:44,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:59:44,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:59:44,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:59:44,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:59:44,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:59:44,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:59:44,452 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:59:44,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:59:44,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:59:44,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:59:44,455 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3c94c2-f60a-4e2b-bd9c-7f06db2ec781/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:59:44,479 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:59:44,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:59:44,480 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:59:44,480 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:59:44,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:59:44,481 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:59:44,482 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:59:44,482 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:59:44,482 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:59:44,483 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:59:44,483 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:59:44,483 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:59:44,484 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:59:44,484 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:59:44,485 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:59:44,485 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:59:44,485 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:59:44,486 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:59:44,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:59:44,487 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:59:44,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:59:44,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:59:44,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:59:44,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:59:44,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:59:44,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:59:44,490 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:59:44,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:59:44,490 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:59:44,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:59:44,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:59:44,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:59:44,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:59:44,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:59:44,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:59:44,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:59:44,493 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:59:44,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:59:44,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:59:44,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:59:44,494 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:59:44,494 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_ac3c94c2-f60a-4e2b-bd9c-7f06db2ec781/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3c94c2-f60a-4e2b-bd9c-7f06db2ec781/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c68befe0cb772d649d152823cc17c89d77797d55cc04257d4beaaad2b518a7a0 [2021-11-25 19:59:44,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:59:44,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:59:44,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:59:44,777 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:59:44,777 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:59:44,779 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3c94c2-f60a-4e2b-bd9c-7f06db2ec781/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/systemc/transmitter.10.cil.c [2021-11-25 19:59:44,845 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3c94c2-f60a-4e2b-bd9c-7f06db2ec781/bin/utaipan-eEHZpOm5b7/data/1f7f19c97/fda057f294e247c38c316875129bf2be/FLAGaa7a29e94 [2021-11-25 19:59:45,322 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:59:45,322 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3c94c2-f60a-4e2b-bd9c-7f06db2ec781/sv-benchmarks/c/systemc/transmitter.10.cil.c [2021-11-25 19:59:45,343 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3c94c2-f60a-4e2b-bd9c-7f06db2ec781/bin/utaipan-eEHZpOm5b7/data/1f7f19c97/fda057f294e247c38c316875129bf2be/FLAGaa7a29e94 [2021-11-25 19:59:45,690 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3c94c2-f60a-4e2b-bd9c-7f06db2ec781/bin/utaipan-eEHZpOm5b7/data/1f7f19c97/fda057f294e247c38c316875129bf2be [2021-11-25 19:59:45,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:59:45,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:59:45,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:59:45,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:59:45,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:59:45,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:59:45" (1/1) ... [2021-11-25 19:59:45,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f1e9372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:45, skipping insertion in model container [2021-11-25 19:59:45,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:59:45" (1/1) ... [2021-11-25 19:59:45,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:59:45,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:59:45,933 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_ac3c94c2-f60a-4e2b-bd9c-7f06db2ec781/sv-benchmarks/c/systemc/transmitter.10.cil.c[706,719] [2021-11-25 19:59:46,068 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:59:46,079 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:59:46,090 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_ac3c94c2-f60a-4e2b-bd9c-7f06db2ec781/sv-benchmarks/c/systemc/transmitter.10.cil.c[706,719] [2021-11-25 19:59:46,193 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:59:46,218 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:59:46,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:46 WrapperNode [2021-11-25 19:59:46,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:59:46,220 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:59:46,220 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:59:46,220 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:59:46,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:46" (1/1) ... [2021-11-25 19:59:46,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:46" (1/1) ... [2021-11-25 19:59:46,319 INFO L137 Inliner]: procedures = 48, calls = 60, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 720 [2021-11-25 19:59:46,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:59:46,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:59:46,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:59:46,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:59:46,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:46" (1/1) ... [2021-11-25 19:59:46,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:46" (1/1) ... [2021-11-25 19:59:46,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:46" (1/1) ... [2021-11-25 19:59:46,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:46" (1/1) ... [2021-11-25 19:59:46,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:46" (1/1) ... [2021-11-25 19:59:46,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:46" (1/1) ... [2021-11-25 19:59:46,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:46" (1/1) ... [2021-11-25 19:59:46,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:59:46,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:59:46,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:59:46,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:59:46,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:46" (1/1) ... [2021-11-25 19:59:46,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:59:46,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3c94c2-f60a-4e2b-bd9c-7f06db2ec781/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:46,461 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3c94c2-f60a-4e2b-bd9c-7f06db2ec781/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:59:46,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3c94c2-f60a-4e2b-bd9c-7f06db2ec781/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:59:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:59:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-25 19:59:46,529 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-25 19:59:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-25 19:59:46,530 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-25 19:59:46,530 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-25 19:59:46,530 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-25 19:59:46,530 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-25 19:59:46,530 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-25 19:59:46,531 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-25 19:59:46,531 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-25 19:59:46,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:59:46,531 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-25 19:59:46,531 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-25 19:59:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:59:46,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:59:46,675 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:59:46,677 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:59:47,384 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:59:47,776 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:59:47,776 INFO L301 CfgBuilder]: Removed 14 assume(true) statements. [2021-11-25 19:59:47,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:59:47 BoogieIcfgContainer [2021-11-25 19:59:47,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:59:47,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:59:47,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:59:47,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:59:47,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:59:45" (1/3) ... [2021-11-25 19:59:47,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b06acff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:59:47, skipping insertion in model container [2021-11-25 19:59:47,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:46" (2/3) ... [2021-11-25 19:59:47,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b06acff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:59:47, skipping insertion in model container [2021-11-25 19:59:47,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:59:47" (3/3) ... [2021-11-25 19:59:47,793 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.10.cil.c [2021-11-25 19:59:47,798 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:59:47,798 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:59:47,862 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:59:47,870 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 [2021-11-25 19:59:47,870 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:59:47,891 INFO L276 IsEmpty]: Start isEmpty. Operand has 164 states, 133 states have (on average 1.556390977443609) internal successors, (207), 135 states have internal predecessors, (207), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-25 19:59:47,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 19:59:47,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:47,903 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:47,903 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:59:47,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:47,908 INFO L85 PathProgramCache]: Analyzing trace with hash 128064639, now seen corresponding path program 1 times [2021-11-25 19:59:47,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:47,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202165689] [2021-11-25 19:59:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:47,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:48,263 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:48,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202165689] [2021-11-25 19:59:48,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202165689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:48,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:59:48,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:59:48,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502272044] [2021-11-25 19:59:48,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:48,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:59:48,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:48,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:59:48,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:59:48,300 INFO L87 Difference]: Start difference. First operand has 164 states, 133 states have (on average 1.556390977443609) internal successors, (207), 135 states have internal predecessors, (207), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:59:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:48,753 INFO L93 Difference]: Finished difference Result 475 states and 757 transitions. [2021-11-25 19:59:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:59:48,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-11-25 19:59:48,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:48,769 INFO L225 Difference]: With dead ends: 475 [2021-11-25 19:59:48,769 INFO L226 Difference]: Without dead ends: 312 [2021-11-25 19:59:48,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:59:48,780 INFO L933 BasicCegarLoop]: 384 mSDtfsCounter, 433 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:48,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 686 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:59:48,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-25 19:59:48,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 309. [2021-11-25 19:59:48,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 255 states have (on average 1.5058823529411764) internal successors, (384), 256 states have internal predecessors, (384), 41 states have call successors, (41), 12 states have call predecessors, (41), 12 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-11-25 19:59:48,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 466 transitions. [2021-11-25 19:59:48,857 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 466 transitions. Word has length 69 [2021-11-25 19:59:48,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:48,857 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 466 transitions. [2021-11-25 19:59:48,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:59:48,858 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 466 transitions. [2021-11-25 19:59:48,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 19:59:48,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:48,863 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:48,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:59:48,864 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:59:48,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:48,865 INFO L85 PathProgramCache]: Analyzing trace with hash -903266176, now seen corresponding path program 1 times [2021-11-25 19:59:48,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:48,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032435440] [2021-11-25 19:59:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:48,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:48,976 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:48,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032435440] [2021-11-25 19:59:48,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032435440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:48,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:59:48,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:59:48,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017092912] [2021-11-25 19:59:48,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:48,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:59:48,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:48,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:59:48,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:59:48,980 INFO L87 Difference]: Start difference. First operand 309 states and 466 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:59:49,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:49,691 INFO L93 Difference]: Finished difference Result 1056 states and 1611 transitions. [2021-11-25 19:59:49,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:59:49,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-11-25 19:59:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:49,707 INFO L225 Difference]: With dead ends: 1056 [2021-11-25 19:59:49,707 INFO L226 Difference]: Without dead ends: 728 [2021-11-25 19:59:49,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:59:49,718 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 908 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:49,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 1095 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 19:59:49,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-11-25 19:59:49,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 716. [2021-11-25 19:59:49,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 607 states have (on average 1.4975288303130148) internal successors, (909), 599 states have internal predecessors, (909), 80 states have call successors, (80), 26 states have call predecessors, (80), 28 states have return successors, (91), 91 states have call predecessors, (91), 80 states have call successors, (91) [2021-11-25 19:59:49,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1080 transitions. [2021-11-25 19:59:49,827 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1080 transitions. Word has length 69 [2021-11-25 19:59:49,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:49,828 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 1080 transitions. [2021-11-25 19:59:49,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:59:49,829 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1080 transitions. [2021-11-25 19:59:49,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 19:59:49,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:49,841 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:49,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:59:49,842 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:59:49,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:49,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1177044671, now seen corresponding path program 1 times [2021-11-25 19:59:49,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:49,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649183491] [2021-11-25 19:59:49,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:49,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:49,932 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:49,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649183491] [2021-11-25 19:59:49,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649183491] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:49,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:59:49,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:59:49,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049272776] [2021-11-25 19:59:49,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:49,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:59:49,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:49,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:59:49,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:59:49,934 INFO L87 Difference]: Start difference. First operand 716 states and 1080 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:59:50,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:50,518 INFO L93 Difference]: Finished difference Result 2507 states and 3833 transitions. [2021-11-25 19:59:50,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:59:50,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-11-25 19:59:50,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:50,532 INFO L225 Difference]: With dead ends: 2507 [2021-11-25 19:59:50,533 INFO L226 Difference]: Without dead ends: 1751 [2021-11-25 19:59:50,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:59:50,537 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 908 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:50,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 902 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:59:50,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2021-11-25 19:59:50,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1363. [2021-11-25 19:59:50,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1158 states have (on average 1.498272884283247) internal successors, (1735), 1151 states have internal predecessors, (1735), 148 states have call successors, (148), 50 states have call predecessors, (148), 56 states have return successors, (180), 162 states have call predecessors, (180), 148 states have call successors, (180) [2021-11-25 19:59:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 2063 transitions. [2021-11-25 19:59:50,627 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 2063 transitions. Word has length 69 [2021-11-25 19:59:50,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:50,627 INFO L470 AbstractCegarLoop]: Abstraction has 1363 states and 2063 transitions. [2021-11-25 19:59:50,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:59:50,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 2063 transitions. [2021-11-25 19:59:50,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 19:59:50,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:50,630 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:50,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:59:50,630 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:59:50,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:50,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1387585568, now seen corresponding path program 1 times [2021-11-25 19:59:50,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:50,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524551928] [2021-11-25 19:59:50,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:50,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:50,707 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:50,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524551928] [2021-11-25 19:59:50,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524551928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:50,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:59:50,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:59:50,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382581140] [2021-11-25 19:59:50,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:50,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:59:50,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:50,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:59:50,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:59:50,709 INFO L87 Difference]: Start difference. First operand 1363 states and 2063 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:59:51,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:51,124 INFO L93 Difference]: Finished difference Result 4050 states and 6235 transitions. [2021-11-25 19:59:51,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:59:51,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-11-25 19:59:51,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:51,147 INFO L225 Difference]: With dead ends: 4050 [2021-11-25 19:59:51,147 INFO L226 Difference]: Without dead ends: 2692 [2021-11-25 19:59:51,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:59:51,154 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 448 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:51,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 684 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:59:51,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2021-11-25 19:59:51,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 2680. [2021-11-25 19:59:51,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2680 states, 2283 states have (on average 1.4883924660534384) internal successors, (3398), 2269 states have internal predecessors, (3398), 284 states have call successors, (284), 100 states have call predecessors, (284), 112 states have return successors, (345), 311 states have call predecessors, (345), 284 states have call successors, (345) [2021-11-25 19:59:51,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2680 states to 2680 states and 4027 transitions. [2021-11-25 19:59:51,315 INFO L78 Accepts]: Start accepts. Automaton has 2680 states and 4027 transitions. Word has length 69 [2021-11-25 19:59:51,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:51,316 INFO L470 AbstractCegarLoop]: Abstraction has 2680 states and 4027 transitions. [2021-11-25 19:59:51,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:59:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2680 states and 4027 transitions. [2021-11-25 19:59:51,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 19:59:51,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:51,318 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:51,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:59:51,319 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:59:51,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:51,319 INFO L85 PathProgramCache]: Analyzing trace with hash 112482879, now seen corresponding path program 1 times [2021-11-25 19:59:51,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:51,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446901518] [2021-11-25 19:59:51,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:51,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:51,414 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:51,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446901518] [2021-11-25 19:59:51,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446901518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:51,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:59:51,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:59:51,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575728823] [2021-11-25 19:59:51,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:51,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:59:51,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:51,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:59:51,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:59:51,423 INFO L87 Difference]: Start difference. First operand 2680 states and 4027 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:59:51,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:51,955 INFO L93 Difference]: Finished difference Result 7973 states and 12179 transitions. [2021-11-25 19:59:51,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:59:51,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-11-25 19:59:51,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:51,995 INFO L225 Difference]: With dead ends: 7973 [2021-11-25 19:59:51,996 INFO L226 Difference]: Without dead ends: 5298 [2021-11-25 19:59:52,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:59:52,009 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 454 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:52,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 684 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:59:52,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5298 states. [2021-11-25 19:59:52,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5298 to 5276. [2021-11-25 19:59:52,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5276 states, 4503 states have (on average 1.4779036198090163) internal successors, (6655), 4476 states have internal predecessors, (6655), 548 states have call successors, (548), 200 states have call predecessors, (548), 224 states have return successors, (664), 600 states have call predecessors, (664), 548 states have call successors, (664) [2021-11-25 19:59:52,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5276 states to 5276 states and 7867 transitions. [2021-11-25 19:59:52,319 INFO L78 Accepts]: Start accepts. Automaton has 5276 states and 7867 transitions. Word has length 69 [2021-11-25 19:59:52,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:52,319 INFO L470 AbstractCegarLoop]: Abstraction has 5276 states and 7867 transitions. [2021-11-25 19:59:52,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:59:52,320 INFO L276 IsEmpty]: Start isEmpty. Operand 5276 states and 7867 transitions. [2021-11-25 19:59:52,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 19:59:52,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:52,321 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:52,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:59:52,322 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:59:52,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:52,323 INFO L85 PathProgramCache]: Analyzing trace with hash 635803550, now seen corresponding path program 1 times [2021-11-25 19:59:52,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:52,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885418897] [2021-11-25 19:59:52,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:52,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:52,483 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:52,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885418897] [2021-11-25 19:59:52,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885418897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:52,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:59:52,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:59:52,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820378229] [2021-11-25 19:59:52,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:52,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:59:52,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:52,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:59:52,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:59:52,487 INFO L87 Difference]: Start difference. First operand 5276 states and 7867 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:59:53,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:53,448 INFO L93 Difference]: Finished difference Result 17809 states and 27018 transitions. [2021-11-25 19:59:53,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:59:53,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-11-25 19:59:53,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:53,539 INFO L225 Difference]: With dead ends: 17809 [2021-11-25 19:59:53,540 INFO L226 Difference]: Without dead ends: 12210 [2021-11-25 19:59:53,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:59:53,567 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 908 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:53,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 902 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:59:53,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12210 states. [2021-11-25 19:59:54,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12210 to 10144. [2021-11-25 19:59:54,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 8651 states have (on average 1.4753207721650676) internal successors, (12763), 8640 states have internal predecessors, (12763), 1044 states have call successors, (1044), 392 states have call predecessors, (1044), 448 states have return successors, (1304), 1112 states have call predecessors, (1304), 1044 states have call successors, (1304) [2021-11-25 19:59:54,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 15111 transitions. [2021-11-25 19:59:54,338 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 15111 transitions. Word has length 69 [2021-11-25 19:59:54,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:54,339 INFO L470 AbstractCegarLoop]: Abstraction has 10144 states and 15111 transitions. [2021-11-25 19:59:54,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:59:54,340 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 15111 transitions. [2021-11-25 19:59:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 19:59:54,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:54,343 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:54,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:59:54,343 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:59:54,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:54,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1554778173, now seen corresponding path program 1 times [2021-11-25 19:59:54,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:54,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099105624] [2021-11-25 19:59:54,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:54,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:54,447 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:54,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099105624] [2021-11-25 19:59:54,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099105624] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:54,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:59:54,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:59:54,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132909358] [2021-11-25 19:59:54,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:54,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:59:54,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:54,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:59:54,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:59:54,450 INFO L87 Difference]: Start difference. First operand 10144 states and 15111 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:59:55,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:55,812 INFO L93 Difference]: Finished difference Result 31616 states and 47145 transitions. [2021-11-25 19:59:55,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:59:55,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-11-25 19:59:55,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:55,940 INFO L225 Difference]: With dead ends: 31616 [2021-11-25 19:59:55,940 INFO L226 Difference]: Without dead ends: 21478 [2021-11-25 19:59:55,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:59:55,984 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 927 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:55,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [934 Valid, 612 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:59:56,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21478 states. [2021-11-25 19:59:57,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21478 to 17148. [2021-11-25 19:59:57,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17148 states, 14791 states have (on average 1.4616320735582449) internal successors, (21619), 14768 states have internal predecessors, (21619), 1588 states have call successors, (1588), 656 states have call predecessors, (1588), 768 states have return successors, (2108), 1724 states have call predecessors, (2108), 1588 states have call successors, (2108) [2021-11-25 19:59:57,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17148 states to 17148 states and 25315 transitions. [2021-11-25 19:59:57,141 INFO L78 Accepts]: Start accepts. Automaton has 17148 states and 25315 transitions. Word has length 69 [2021-11-25 19:59:57,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:57,141 INFO L470 AbstractCegarLoop]: Abstraction has 17148 states and 25315 transitions. [2021-11-25 19:59:57,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:59:57,142 INFO L276 IsEmpty]: Start isEmpty. Operand 17148 states and 25315 transitions. [2021-11-25 19:59:57,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 19:59:57,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:57,144 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:57,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:59:57,145 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:59:57,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:57,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1973817297, now seen corresponding path program 1 times [2021-11-25 19:59:57,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:57,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606988132] [2021-11-25 19:59:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:57,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:57,274 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:57,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606988132] [2021-11-25 19:59:57,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606988132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:57,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:59:57,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:59:57,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550472526] [2021-11-25 19:59:57,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:57,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:59:57,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:57,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:59:57,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:59:57,277 INFO L87 Difference]: Start difference. First operand 17148 states and 25315 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:59:59,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:59,389 INFO L93 Difference]: Finished difference Result 63632 states and 94046 transitions. [2021-11-25 19:59:59,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:59:59,390 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2021-11-25 19:59:59,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:59,607 INFO L225 Difference]: With dead ends: 63632 [2021-11-25 19:59:59,608 INFO L226 Difference]: Without dead ends: 46490 [2021-11-25 19:59:59,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:59:59,668 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 907 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:59,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 683 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:59:59,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46490 states. [2021-11-25 20:00:01,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46490 to 33672. [2021-11-25 20:00:01,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33672 states, 29059 states have (on average 1.4559000653842182) internal successors, (42307), 29020 states have internal predecessors, (42307), 3076 states have call successors, (3076), 1312 states have call predecessors, (3076), 1536 states have return successors, (4060), 3340 states have call predecessors, (4060), 3076 states have call successors, (4060) [2021-11-25 20:00:01,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33672 states to 33672 states and 49443 transitions. [2021-11-25 20:00:01,721 INFO L78 Accepts]: Start accepts. Automaton has 33672 states and 49443 transitions. Word has length 70 [2021-11-25 20:00:01,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:00:01,722 INFO L470 AbstractCegarLoop]: Abstraction has 33672 states and 49443 transitions. [2021-11-25 20:00:01,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 20:00:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 33672 states and 49443 transitions. [2021-11-25 20:00:01,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 20:00:01,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:00:01,725 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:00:01,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:00:01,725 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:00:01,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:00:01,726 INFO L85 PathProgramCache]: Analyzing trace with hash 996325652, now seen corresponding path program 1 times [2021-11-25 20:00:01,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:00:01,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198243017] [2021-11-25 20:00:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:00:01,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:00:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:00:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:00:01,849 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:00:01,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198243017] [2021-11-25 20:00:01,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198243017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:00:01,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:00:01,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:00:01,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519959215] [2021-11-25 20:00:01,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:00:01,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:00:01,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:00:01,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:00:01,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:00:01,852 INFO L87 Difference]: Start difference. First operand 33672 states and 49443 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 20:00:05,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:00:05,022 INFO L93 Difference]: Finished difference Result 96636 states and 142253 transitions. [2021-11-25 20:00:05,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:00:05,023 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2021-11-25 20:00:05,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:00:05,256 INFO L225 Difference]: With dead ends: 96636 [2021-11-25 20:00:05,256 INFO L226 Difference]: Without dead ends: 62970 [2021-11-25 20:00:05,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:00:05,332 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 834 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:00:05,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 641 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:00:05,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62970 states. [2021-11-25 20:00:07,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62970 to 50072. [2021-11-25 20:00:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50072 states, 43171 states have (on average 1.4510435245882654) internal successors, (62643), 43044 states have internal predecessors, (62643), 4596 states have call successors, (4596), 1984 states have call predecessors, (4596), 2304 states have return successors, (5972), 5044 states have call predecessors, (5972), 4596 states have call successors, (5972) [2021-11-25 20:00:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50072 states to 50072 states and 73211 transitions. [2021-11-25 20:00:08,073 INFO L78 Accepts]: Start accepts. Automaton has 50072 states and 73211 transitions. Word has length 71 [2021-11-25 20:00:08,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:00:08,078 INFO L470 AbstractCegarLoop]: Abstraction has 50072 states and 73211 transitions. [2021-11-25 20:00:08,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 20:00:08,079 INFO L276 IsEmpty]: Start isEmpty. Operand 50072 states and 73211 transitions. [2021-11-25 20:00:08,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-25 20:00:08,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:00:08,082 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:00:08,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:00:08,082 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:00:08,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:00:08,083 INFO L85 PathProgramCache]: Analyzing trace with hash -447451731, now seen corresponding path program 1 times [2021-11-25 20:00:08,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:00:08,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874201802] [2021-11-25 20:00:08,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:00:08,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:00:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:00:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:00:08,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:00:08,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874201802] [2021-11-25 20:00:08,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874201802] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:00:08,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:00:08,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:00:08,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492805777] [2021-11-25 20:00:08,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:00:08,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:00:08,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:00:08,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:00:08,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:00:08,207 INFO L87 Difference]: Start difference. First operand 50072 states and 73211 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 20:00:12,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:00:12,500 INFO L93 Difference]: Finished difference Result 141300 states and 207293 transitions. [2021-11-25 20:00:12,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:00:12,501 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 72 [2021-11-25 20:00:12,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:00:12,908 INFO L225 Difference]: With dead ends: 141300 [2021-11-25 20:00:12,908 INFO L226 Difference]: Without dead ends: 91234 [2021-11-25 20:00:13,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:00:13,045 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 769 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:00:13,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 774 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:00:13,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91234 states. [2021-11-25 20:00:16,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91234 to 74624. [2021-11-25 20:00:16,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74624 states, 64283 states have (on average 1.4461521708694367) internal successors, (92963), 63980 states have internal predecessors, (92963), 6884 states have call successors, (6884), 3008 states have call predecessors, (6884), 3456 states have return successors, (8772), 7636 states have call predecessors, (8772), 6884 states have call successors, (8772) [2021-11-25 20:00:17,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74624 states to 74624 states and 108619 transitions. [2021-11-25 20:00:17,203 INFO L78 Accepts]: Start accepts. Automaton has 74624 states and 108619 transitions. Word has length 72 [2021-11-25 20:00:17,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:00:17,205 INFO L470 AbstractCegarLoop]: Abstraction has 74624 states and 108619 transitions. [2021-11-25 20:00:17,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 20:00:17,205 INFO L276 IsEmpty]: Start isEmpty. Operand 74624 states and 108619 transitions. [2021-11-25 20:00:17,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 20:00:17,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:00:17,207 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:00:17,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:00:17,208 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:00:17,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:00:17,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1862629176, now seen corresponding path program 1 times [2021-11-25 20:00:17,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:00:17,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811387252] [2021-11-25 20:00:17,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:00:17,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:00:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:00:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:00:17,307 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:00:17,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811387252] [2021-11-25 20:00:17,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811387252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:00:17,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:00:17,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:00:17,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290812430] [2021-11-25 20:00:17,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:00:17,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:00:17,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:00:17,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:00:17,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:00:17,310 INFO L87 Difference]: Start difference. First operand 74624 states and 108619 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 20:00:25,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:00:25,312 INFO L93 Difference]: Finished difference Result 259796 states and 379566 transitions. [2021-11-25 20:00:25,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:00:25,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2021-11-25 20:00:25,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:00:26,044 INFO L225 Difference]: With dead ends: 259796 [2021-11-25 20:00:26,044 INFO L226 Difference]: Without dead ends: 185178 [2021-11-25 20:00:26,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:00:26,350 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 853 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:00:26,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 565 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:00:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185178 states.