./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.13.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb6ffc6-ca5b-4831-964b-7c59c004744e/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb6ffc6-ca5b-4831-964b-7c59c004744e/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb6ffc6-ca5b-4831-964b-7c59c004744e/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb6ffc6-ca5b-4831-964b-7c59c004744e/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.13.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb6ffc6-ca5b-4831-964b-7c59c004744e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb6ffc6-ca5b-4831-964b-7c59c004744e/bin/utaipan-aC7eJsxGYH --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 becb9ccb4493d75cddd14287f2c0aa195c14f5e8b7aa6c07544870b125e44e56 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:53:49,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:53:49,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:53:49,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:53:49,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:53:49,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:53:49,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:53:49,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:53:49,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:53:49,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:53:49,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:53:49,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:53:49,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:53:49,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:53:49,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:53:49,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:53:49,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:53:49,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:53:49,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:53:49,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:53:49,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:53:49,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:53:49,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:53:49,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:53:49,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:53:49,430 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:53:49,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:53:49,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:53:49,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:53:49,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:53:49,435 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:53:49,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:53:49,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:53:49,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:53:49,440 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:53:49,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:53:49,441 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:53:49,442 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:53:49,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:53:49,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:53:49,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:53:49,446 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb6ffc6-ca5b-4831-964b-7c59c004744e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 03:53:49,479 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:53:49,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:53:49,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:53:49,481 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:53:49,481 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:53:49,482 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:53:49,482 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:53:49,482 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:53:49,483 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:53:49,483 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:53:49,483 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:53:49,483 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:53:49,484 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:53:49,484 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:53:49,484 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:53:49,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:53:49,486 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:53:49,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:53:49,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:53:49,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:53:49,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:53:49,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:53:49,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:53:49,488 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:53:49,488 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:53:49,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:53:49,488 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:53:49,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:53:49,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:53:49,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:53:49,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:53:49,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:53:49,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:53:49,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:53:49,491 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:53:49,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:53:49,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:53:49,492 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:53:49,492 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:53:49,492 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_4eb6ffc6-ca5b-4831-964b-7c59c004744e/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb6ffc6-ca5b-4831-964b-7c59c004744e/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> becb9ccb4493d75cddd14287f2c0aa195c14f5e8b7aa6c07544870b125e44e56 [2021-11-03 03:53:49,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:53:49,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:53:49,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:53:49,872 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:53:49,873 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:53:49,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb6ffc6-ca5b-4831-964b-7c59c004744e/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/systemc/token_ring.13.cil-1.c [2021-11-03 03:53:49,960 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb6ffc6-ca5b-4831-964b-7c59c004744e/bin/utaipan-aC7eJsxGYH/data/a859e1e97/29266735b05344589308f653c0336807/FLAG4998ed920 [2021-11-03 03:53:50,661 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:53:50,662 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb6ffc6-ca5b-4831-964b-7c59c004744e/sv-benchmarks/c/systemc/token_ring.13.cil-1.c [2021-11-03 03:53:50,697 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb6ffc6-ca5b-4831-964b-7c59c004744e/bin/utaipan-aC7eJsxGYH/data/a859e1e97/29266735b05344589308f653c0336807/FLAG4998ed920 [2021-11-03 03:53:50,943 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb6ffc6-ca5b-4831-964b-7c59c004744e/bin/utaipan-aC7eJsxGYH/data/a859e1e97/29266735b05344589308f653c0336807 [2021-11-03 03:53:50,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:53:50,951 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:53:50,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:53:50,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:53:50,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:53:50,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:53:50" (1/1) ... [2021-11-03 03:53:50,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28703bfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:50, skipping insertion in model container [2021-11-03 03:53:50,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:53:50" (1/1) ... [2021-11-03 03:53:50,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:53:51,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:53:51,297 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb6ffc6-ca5b-4831-964b-7c59c004744e/sv-benchmarks/c/systemc/token_ring.13.cil-1.c[366,379] [2021-11-03 03:53:51,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:53:51,586 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:53:51,614 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb6ffc6-ca5b-4831-964b-7c59c004744e/sv-benchmarks/c/systemc/token_ring.13.cil-1.c[366,379] [2021-11-03 03:53:51,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:53:51,781 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:53:51,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:51 WrapperNode [2021-11-03 03:53:51,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:53:51,783 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:53:51,783 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:53:51,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:53:51,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:51" (1/1) ... [2021-11-03 03:53:51,824 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:51" (1/1) ... [2021-11-03 03:53:52,029 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:53:52,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:53:52,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:53:52,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:53:52,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:51" (1/1) ... [2021-11-03 03:53:52,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:51" (1/1) ... [2021-11-03 03:53:52,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:51" (1/1) ... [2021-11-03 03:53:52,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:51" (1/1) ... [2021-11-03 03:53:52,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:51" (1/1) ... [2021-11-03 03:53:52,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:51" (1/1) ... [2021-11-03 03:53:52,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:51" (1/1) ... [2021-11-03 03:53:52,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:53:52,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:53:52,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:53:52,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:53:52,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:51" (1/1) ... [2021-11-03 03:53:52,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:53:52,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb6ffc6-ca5b-4831-964b-7c59c004744e/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:53:52,358 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb6ffc6-ca5b-4831-964b-7c59c004744e/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:53:52,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb6ffc6-ca5b-4831-964b-7c59c004744e/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:53:52,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:53:52,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 03:53:52,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:53:52,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:54:02,338 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:54:02,339 INFO L299 CfgBuilder]: Removed 622 assume(true) statements. [2021-11-03 03:54:02,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:54:02 BoogieIcfgContainer [2021-11-03 03:54:02,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:54:02,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:54:02,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:54:02,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:54:02,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:53:50" (1/3) ... [2021-11-03 03:54:02,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c20e7e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:54:02, skipping insertion in model container [2021-11-03 03:54:02,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:51" (2/3) ... [2021-11-03 03:54:02,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c20e7e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:54:02, skipping insertion in model container [2021-11-03 03:54:02,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:54:02" (3/3) ... [2021-11-03 03:54:02,363 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.13.cil-1.c [2021-11-03 03:54:02,372 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:54:02,372 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-03 03:54:02,469 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:54:02,481 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 [2021-11-03 03:54:02,481 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-03 03:54:02,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 1040 states, 1037 states have (on average 1.5245901639344261) internal successors, (1581), 1039 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:02,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 03:54:02,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:02,543 INFO L513 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] [2021-11-03 03:54:02,544 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:02,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:02,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1596035847, now seen corresponding path program 1 times [2021-11-03 03:54:02,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:02,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103250234] [2021-11-03 03:54:02,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:02,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:54:02,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:02,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103250234] [2021-11-03 03:54:02,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103250234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:02,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:02,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 03:54:02,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021194012] [2021-11-03 03:54:02,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:54:02,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:02,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:54:02,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:54:02,875 INFO L87 Difference]: Start difference. First operand has 1040 states, 1037 states have (on average 1.5245901639344261) internal successors, (1581), 1039 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:03,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:03,129 INFO L93 Difference]: Finished difference Result 3035 states and 4607 transitions. [2021-11-03 03:54:03,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:54:03,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 03:54:03,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:03,162 INFO L225 Difference]: With dead ends: 3035 [2021-11-03 03:54:03,162 INFO L226 Difference]: Without dead ends: 1993 [2021-11-03 03:54:03,171 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:54:03,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-11-03 03:54:03,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1939. [2021-11-03 03:54:03,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1937 states have (on average 1.5069695405265875) internal successors, (2919), 1938 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 2919 transitions. [2021-11-03 03:54:03,330 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 2919 transitions. Word has length 52 [2021-11-03 03:54:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:03,331 INFO L470 AbstractCegarLoop]: Abstraction has 1939 states and 2919 transitions. [2021-11-03 03:54:03,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:03,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 2919 transitions. [2021-11-03 03:54:03,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-03 03:54:03,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:03,345 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:54:03,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 03:54:03,345 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:03,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:03,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1298807665, now seen corresponding path program 1 times [2021-11-03 03:54:03,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:03,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24885095] [2021-11-03 03:54:03,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:03,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 03:54:03,532 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:03,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24885095] [2021-11-03 03:54:03,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24885095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:03,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:03,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:54:03,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122058536] [2021-11-03 03:54:03,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:54:03,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:03,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:54:03,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:54:03,539 INFO L87 Difference]: Start difference. First operand 1939 states and 2919 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:04,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:04,036 INFO L93 Difference]: Finished difference Result 6589 states and 9891 transitions. [2021-11-03 03:54:04,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:54:04,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-03 03:54:04,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:04,071 INFO L225 Difference]: With dead ends: 6589 [2021-11-03 03:54:04,072 INFO L226 Difference]: Without dead ends: 4659 [2021-11-03 03:54:04,077 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:54:04,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4659 states. [2021-11-03 03:54:04,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4659 to 3675. [2021-11-03 03:54:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3675 states, 3673 states have (on average 1.4960522733460386) internal successors, (5495), 3674 states have internal predecessors, (5495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:04,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3675 states to 3675 states and 5495 transitions. [2021-11-03 03:54:04,336 INFO L78 Accepts]: Start accepts. Automaton has 3675 states and 5495 transitions. Word has length 113 [2021-11-03 03:54:04,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:04,336 INFO L470 AbstractCegarLoop]: Abstraction has 3675 states and 5495 transitions. [2021-11-03 03:54:04,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:04,337 INFO L276 IsEmpty]: Start isEmpty. Operand 3675 states and 5495 transitions. [2021-11-03 03:54:04,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-03 03:54:04,347 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:04,347 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:54:04,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 03:54:04,348 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:04,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:04,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1860397457, now seen corresponding path program 1 times [2021-11-03 03:54:04,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:04,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165146125] [2021-11-03 03:54:04,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:04,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 03:54:04,485 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:04,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165146125] [2021-11-03 03:54:04,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165146125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:04,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:04,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:54:04,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534585238] [2021-11-03 03:54:04,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:54:04,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:04,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:54:04,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:54:04,489 INFO L87 Difference]: Start difference. First operand 3675 states and 5495 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:05,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:05,129 INFO L93 Difference]: Finished difference Result 12532 states and 18682 transitions. [2021-11-03 03:54:05,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:54:05,130 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-03 03:54:05,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:05,193 INFO L225 Difference]: With dead ends: 12532 [2021-11-03 03:54:05,194 INFO L226 Difference]: Without dead ends: 8873 [2021-11-03 03:54:05,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:54:05,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8873 states. [2021-11-03 03:54:05,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8873 to 7010. [2021-11-03 03:54:05,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7010 states, 7008 states have (on average 1.4848744292237444) internal successors, (10406), 7009 states have internal predecessors, (10406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:05,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7010 states to 7010 states and 10406 transitions. [2021-11-03 03:54:05,617 INFO L78 Accepts]: Start accepts. Automaton has 7010 states and 10406 transitions. Word has length 113 [2021-11-03 03:54:05,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:05,620 INFO L470 AbstractCegarLoop]: Abstraction has 7010 states and 10406 transitions. [2021-11-03 03:54:05,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:05,620 INFO L276 IsEmpty]: Start isEmpty. Operand 7010 states and 10406 transitions. [2021-11-03 03:54:05,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-03 03:54:05,639 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:05,640 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:54:05,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 03:54:05,640 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:05,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:05,641 INFO L85 PathProgramCache]: Analyzing trace with hash 857340592, now seen corresponding path program 1 times [2021-11-03 03:54:05,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:05,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18033037] [2021-11-03 03:54:05,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:05,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 03:54:05,826 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:05,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18033037] [2021-11-03 03:54:05,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18033037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:05,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:05,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:54:05,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423908064] [2021-11-03 03:54:05,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:54:05,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:05,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:54:05,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:54:05,833 INFO L87 Difference]: Start difference. First operand 7010 states and 10406 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:06,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:06,781 INFO L93 Difference]: Finished difference Result 23918 states and 35392 transitions. [2021-11-03 03:54:06,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:54:06,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-03 03:54:06,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:06,893 INFO L225 Difference]: With dead ends: 23918 [2021-11-03 03:54:06,893 INFO L226 Difference]: Without dead ends: 16931 [2021-11-03 03:54:06,911 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:54:06,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16931 states. [2021-11-03 03:54:07,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16931 to 13409. [2021-11-03 03:54:07,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13409 states, 13407 states have (on average 1.4734840008950547) internal successors, (19755), 13408 states have internal predecessors, (19755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:07,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13409 states to 13409 states and 19755 transitions. [2021-11-03 03:54:07,817 INFO L78 Accepts]: Start accepts. Automaton has 13409 states and 19755 transitions. Word has length 113 [2021-11-03 03:54:07,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:07,818 INFO L470 AbstractCegarLoop]: Abstraction has 13409 states and 19755 transitions. [2021-11-03 03:54:07,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:07,821 INFO L276 IsEmpty]: Start isEmpty. Operand 13409 states and 19755 transitions. [2021-11-03 03:54:07,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-03 03:54:07,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:07,847 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:54:07,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 03:54:07,848 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:07,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:07,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1130336015, now seen corresponding path program 1 times [2021-11-03 03:54:07,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:07,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518485655] [2021-11-03 03:54:07,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:07,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 03:54:07,986 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:07,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518485655] [2021-11-03 03:54:07,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518485655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:07,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:07,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:54:07,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281585144] [2021-11-03 03:54:07,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:54:07,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:07,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:54:07,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:54:07,990 INFO L87 Difference]: Start difference. First operand 13409 states and 19755 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:09,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:09,388 INFO L93 Difference]: Finished difference Result 45763 states and 67197 transitions. [2021-11-03 03:54:09,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:54:09,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-03 03:54:09,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:09,483 INFO L225 Difference]: With dead ends: 45763 [2021-11-03 03:54:09,484 INFO L226 Difference]: Without dead ends: 32380 [2021-11-03 03:54:09,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:54:09,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32380 states. [2021-11-03 03:54:10,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32380 to 25672. [2021-11-03 03:54:10,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25672 states, 25670 states have (on average 1.461940007791196) internal successors, (37528), 25671 states have internal predecessors, (37528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25672 states to 25672 states and 37528 transitions. [2021-11-03 03:54:10,975 INFO L78 Accepts]: Start accepts. Automaton has 25672 states and 37528 transitions. Word has length 113 [2021-11-03 03:54:10,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:10,976 INFO L470 AbstractCegarLoop]: Abstraction has 25672 states and 37528 transitions. [2021-11-03 03:54:10,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:10,976 INFO L276 IsEmpty]: Start isEmpty. Operand 25672 states and 37528 transitions. [2021-11-03 03:54:11,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-03 03:54:11,025 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:11,025 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:54:11,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 03:54:11,026 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:11,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:11,026 INFO L85 PathProgramCache]: Analyzing trace with hash 2108941551, now seen corresponding path program 1 times [2021-11-03 03:54:11,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:11,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220702867] [2021-11-03 03:54:11,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:11,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 03:54:11,129 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:11,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220702867] [2021-11-03 03:54:11,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220702867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:11,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:11,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:54:11,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729884516] [2021-11-03 03:54:11,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:54:11,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:11,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:54:11,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:54:11,146 INFO L87 Difference]: Start difference. First operand 25672 states and 37528 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:13,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:13,566 INFO L93 Difference]: Finished difference Result 87410 states and 127334 transitions. [2021-11-03 03:54:13,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:54:13,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-03 03:54:13,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:13,765 INFO L225 Difference]: With dead ends: 87410 [2021-11-03 03:54:13,766 INFO L226 Difference]: Without dead ends: 61771 [2021-11-03 03:54:13,818 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:54:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61771 states. [2021-11-03 03:54:16,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61771 to 49143. [2021-11-03 03:54:16,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49143 states, 49141 states have (on average 1.450296086770721) internal successors, (71269), 49142 states have internal predecessors, (71269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:16,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49143 states to 49143 states and 71269 transitions. [2021-11-03 03:54:16,510 INFO L78 Accepts]: Start accepts. Automaton has 49143 states and 71269 transitions. Word has length 113 [2021-11-03 03:54:16,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:16,511 INFO L470 AbstractCegarLoop]: Abstraction has 49143 states and 71269 transitions. [2021-11-03 03:54:16,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:16,512 INFO L276 IsEmpty]: Start isEmpty. Operand 49143 states and 71269 transitions. [2021-11-03 03:54:16,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-03 03:54:16,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:16,590 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:54:16,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 03:54:16,591 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:16,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:16,592 INFO L85 PathProgramCache]: Analyzing trace with hash -873061681, now seen corresponding path program 1 times [2021-11-03 03:54:16,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:16,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144988646] [2021-11-03 03:54:16,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:16,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 03:54:16,706 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:16,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144988646] [2021-11-03 03:54:16,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144988646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:16,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:16,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:54:16,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024631991] [2021-11-03 03:54:16,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:54:16,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:16,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:54:16,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:54:16,709 INFO L87 Difference]: Start difference. First operand 49143 states and 71269 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:20,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:20,168 INFO L93 Difference]: Finished difference Result 166809 states and 241031 transitions. [2021-11-03 03:54:20,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:54:20,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-03 03:54:20,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:20,467 INFO L225 Difference]: With dead ends: 166809 [2021-11-03 03:54:20,467 INFO L226 Difference]: Without dead ends: 117706 [2021-11-03 03:54:20,539 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:54:20,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117706 states. [2021-11-03 03:54:24,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117706 to 94006. [2021-11-03 03:54:24,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94006 states, 94004 states have (on average 1.4385983575167014) internal successors, (135234), 94005 states have internal predecessors, (135234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:24,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94006 states to 94006 states and 135234 transitions. [2021-11-03 03:54:24,451 INFO L78 Accepts]: Start accepts. Automaton has 94006 states and 135234 transitions. Word has length 113 [2021-11-03 03:54:24,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:24,451 INFO L470 AbstractCegarLoop]: Abstraction has 94006 states and 135234 transitions. [2021-11-03 03:54:24,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:24,452 INFO L276 IsEmpty]: Start isEmpty. Operand 94006 states and 135234 transitions. [2021-11-03 03:54:24,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-03 03:54:24,926 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:24,926 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:54:24,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 03:54:24,946 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:24,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:24,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1867233105, now seen corresponding path program 1 times [2021-11-03 03:54:24,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:24,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088602702] [2021-11-03 03:54:24,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:24,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 03:54:25,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:25,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088602702] [2021-11-03 03:54:25,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088602702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:25,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:25,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:54:25,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535411602] [2021-11-03 03:54:25,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:54:25,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:25,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:54:25,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:54:25,093 INFO L87 Difference]: Start difference. First operand 94006 states and 135234 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:31,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:31,274 INFO L93 Difference]: Finished difference Result 317920 states and 455592 transitions. [2021-11-03 03:54:31,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:54:31,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-03 03:54:31,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:32,079 INFO L225 Difference]: With dead ends: 317920 [2021-11-03 03:54:32,079 INFO L226 Difference]: Without dead ends: 223961 [2021-11-03 03:54:32,216 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:54:32,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223961 states. [2021-11-03 03:54:38,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223961 to 179637. [2021-11-03 03:54:38,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179637 states, 179635 states have (on average 1.4268878559300804) internal successors, (256319), 179636 states have internal predecessors, (256319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:39,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179637 states to 179637 states and 256319 transitions. [2021-11-03 03:54:39,392 INFO L78 Accepts]: Start accepts. Automaton has 179637 states and 256319 transitions. Word has length 113 [2021-11-03 03:54:39,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:39,394 INFO L470 AbstractCegarLoop]: Abstraction has 179637 states and 256319 transitions. [2021-11-03 03:54:39,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 179637 states and 256319 transitions. [2021-11-03 03:54:39,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-03 03:54:39,551 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:39,551 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:54:39,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 03:54:39,551 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:39,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:39,552 INFO L85 PathProgramCache]: Analyzing trace with hash 264754928, now seen corresponding path program 1 times [2021-11-03 03:54:39,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:39,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886970805] [2021-11-03 03:54:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:39,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:54:39,634 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:39,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886970805] [2021-11-03 03:54:39,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886970805] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:39,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:39,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:54:39,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201359090] [2021-11-03 03:54:39,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:54:39,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:39,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:54:39,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:54:39,637 INFO L87 Difference]: Start difference. First operand 179637 states and 256319 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:51,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:51,717 INFO L93 Difference]: Finished difference Result 616545 states and 875887 transitions. [2021-11-03 03:54:51,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:54:51,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-03 03:54:51,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:52,668 INFO L225 Difference]: With dead ends: 616545 [2021-11-03 03:54:52,668 INFO L226 Difference]: Without dead ends: 436920 [2021-11-03 03:54:52,917 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:54:53,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436920 states.