./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.16.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132bf93c-2605-469a-8176-f820e1b05e7e/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132bf93c-2605-469a-8176-f820e1b05e7e/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132bf93c-2605-469a-8176-f820e1b05e7e/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132bf93c-2605-469a-8176-f820e1b05e7e/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.16.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132bf93c-2605-469a-8176-f820e1b05e7e/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132bf93c-2605-469a-8176-f820e1b05e7e/bin/utaipan-EQgc7hIp5V --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 45519c8273c53879cf6a170ed74d5bc0be814b1f3243ce6c30d1d3efe9a3cf32 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:55:24,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:55:24,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:55:24,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:55:24,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:55:24,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:55:24,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:55:24,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:55:24,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:55:24,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:55:24,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:55:24,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:55:24,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:55:24,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:55:24,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:55:24,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:55:24,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:55:24,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:55:24,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:55:24,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:55:24,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:55:24,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:55:24,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:55:24,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:55:24,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:55:24,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:55:24,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:55:24,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:55:24,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:55:24,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:55:24,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:55:24,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:55:24,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:55:24,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:55:24,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:55:24,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:55:24,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:55:24,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:55:24,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:55:24,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:55:24,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:55:24,480 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132bf93c-2605-469a-8176-f820e1b05e7e/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:55:24,537 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:55:24,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:55:24,538 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:55:24,539 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:55:24,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:55:24,540 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:55:24,541 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:55:24,541 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:55:24,541 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:55:24,541 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:55:24,543 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:55:24,543 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:55:24,544 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:55:24,544 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:55:24,544 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:55:24,545 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:55:24,545 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:55:24,545 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:55:24,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:55:24,546 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:55:24,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:55:24,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:55:24,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:55:24,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:55:24,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:55:24,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:55:24,548 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:55:24,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:55:24,549 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:55:24,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:55:24,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:55:24,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:55:24,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:55:24,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:55:24,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:55:24,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:55:24,552 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:55:24,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:55:24,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:55:24,552 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:55:24,553 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:55:24,553 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_132bf93c-2605-469a-8176-f820e1b05e7e/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132bf93c-2605-469a-8176-f820e1b05e7e/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45519c8273c53879cf6a170ed74d5bc0be814b1f3243ce6c30d1d3efe9a3cf32 [2021-11-23 02:55:24,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:55:24,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:55:24,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:55:24,920 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:55:24,921 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:55:24,923 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132bf93c-2605-469a-8176-f820e1b05e7e/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/systemc/transmitter.16.cil.c [2021-11-23 02:55:25,040 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132bf93c-2605-469a-8176-f820e1b05e7e/bin/utaipan-EQgc7hIp5V/data/55e0ceb5c/ca3dda8663dc4d14827340a0e6c852e0/FLAGdb573adb9 [2021-11-23 02:55:25,815 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:55:25,816 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132bf93c-2605-469a-8176-f820e1b05e7e/sv-benchmarks/c/systemc/transmitter.16.cil.c [2021-11-23 02:55:25,854 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132bf93c-2605-469a-8176-f820e1b05e7e/bin/utaipan-EQgc7hIp5V/data/55e0ceb5c/ca3dda8663dc4d14827340a0e6c852e0/FLAGdb573adb9 [2021-11-23 02:55:26,056 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132bf93c-2605-469a-8176-f820e1b05e7e/bin/utaipan-EQgc7hIp5V/data/55e0ceb5c/ca3dda8663dc4d14827340a0e6c852e0 [2021-11-23 02:55:26,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:55:26,061 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:55:26,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:55:26,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:55:26,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:55:26,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:55:26" (1/1) ... [2021-11-23 02:55:26,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f517e7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:26, skipping insertion in model container [2021-11-23 02:55:26,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:55:26" (1/1) ... [2021-11-23 02:55:26,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:55:26,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:55:26,377 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_132bf93c-2605-469a-8176-f820e1b05e7e/sv-benchmarks/c/systemc/transmitter.16.cil.c[706,719] [2021-11-23 02:55:26,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:55:26,593 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:55:26,607 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_132bf93c-2605-469a-8176-f820e1b05e7e/sv-benchmarks/c/systemc/transmitter.16.cil.c[706,719] [2021-11-23 02:55:26,716 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:55:26,753 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:55:26,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:26 WrapperNode [2021-11-23 02:55:26,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:55:26,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:55:26,756 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:55:26,756 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:55:26,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:26" (1/1) ... [2021-11-23 02:55:26,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:26" (1/1) ... [2021-11-23 02:55:26,882 INFO L137 Inliner]: procedures = 56, calls = 71, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 945 [2021-11-23 02:55:26,882 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:55:26,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:55:26,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:55:26,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:55:26,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:26" (1/1) ... [2021-11-23 02:55:26,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:26" (1/1) ... [2021-11-23 02:55:26,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:26" (1/1) ... [2021-11-23 02:55:26,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:26" (1/1) ... [2021-11-23 02:55:26,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:26" (1/1) ... [2021-11-23 02:55:26,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:26" (1/1) ... [2021-11-23 02:55:26,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:26" (1/1) ... [2021-11-23 02:55:26,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:55:26,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:55:26,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:55:26,970 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:55:26,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:26" (1/1) ... [2021-11-23 02:55:26,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:55:27,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132bf93c-2605-469a-8176-f820e1b05e7e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:55:27,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132bf93c-2605-469a-8176-f820e1b05e7e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:55:27,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132bf93c-2605-469a-8176-f820e1b05e7e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:55:27,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:55:27,080 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-23 02:55:27,080 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-23 02:55:27,081 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-23 02:55:27,081 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-23 02:55:27,081 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-23 02:55:27,081 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-23 02:55:27,082 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-23 02:55:27,082 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-23 02:55:27,082 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-23 02:55:27,082 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-23 02:55:27,082 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-23 02:55:27,083 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-23 02:55:27,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:55:27,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:55:27,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:55:27,318 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:55:27,320 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:55:28,349 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:55:29,129 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:55:29,129 INFO L301 CfgBuilder]: Removed 18 assume(true) statements. [2021-11-23 02:55:29,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:55:29 BoogieIcfgContainer [2021-11-23 02:55:29,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:55:29,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:55:29,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:55:29,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:55:29,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:55:26" (1/3) ... [2021-11-23 02:55:29,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac628e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:55:29, skipping insertion in model container [2021-11-23 02:55:29,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:26" (2/3) ... [2021-11-23 02:55:29,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac628e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:55:29, skipping insertion in model container [2021-11-23 02:55:29,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:55:29" (3/3) ... [2021-11-23 02:55:29,145 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.16.cil.c [2021-11-23 02:55:29,152 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:55:29,152 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:55:29,208 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:55:29,216 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 [2021-11-23 02:55:29,217 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:55:29,250 INFO L276 IsEmpty]: Start isEmpty. Operand has 197 states, 163 states have (on average 1.5521472392638036) internal successors, (253), 165 states have internal predecessors, (253), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-23 02:55:29,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 02:55:29,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:29,264 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] [2021-11-23 02:55:29,264 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:29,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:29,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1439967137, now seen corresponding path program 1 times [2021-11-23 02:55:29,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:29,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254151375] [2021-11-23 02:55:29,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:29,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:29,782 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:29,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254151375] [2021-11-23 02:55:29,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254151375] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:29,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:29,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:55:29,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613088864] [2021-11-23 02:55:29,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:29,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:55:29,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:29,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:55:29,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:55:29,849 INFO L87 Difference]: Start difference. First operand has 197 states, 163 states have (on average 1.5521472392638036) internal successors, (253), 165 states have internal predecessors, (253), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2021-11-23 02:55:30,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:30,639 INFO L93 Difference]: Finished difference Result 578 states and 911 transitions. [2021-11-23 02:55:30,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:55:30,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 70 [2021-11-23 02:55:30,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:30,673 INFO L225 Difference]: With dead ends: 578 [2021-11-23 02:55:30,674 INFO L226 Difference]: Without dead ends: 382 [2021-11-23 02:55:30,688 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 [2021-11-23 02:55:30,693 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 533 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:30,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 850 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:55:30,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-23 02:55:30,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 378. [2021-11-23 02:55:30,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 317 states have (on average 1.5173501577287065) internal successors, (481), 319 states have internal predecessors, (481), 48 states have call successors, (48), 12 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-23 02:55:30,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 577 transitions. [2021-11-23 02:55:30,851 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 577 transitions. Word has length 70 [2021-11-23 02:55:30,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:30,853 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 577 transitions. [2021-11-23 02:55:30,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2021-11-23 02:55:30,853 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 577 transitions. [2021-11-23 02:55:30,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 02:55:30,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:30,864 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] [2021-11-23 02:55:30,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:55:30,865 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:30,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:30,870 INFO L85 PathProgramCache]: Analyzing trace with hash -466517056, now seen corresponding path program 1 times [2021-11-23 02:55:30,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:30,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869615495] [2021-11-23 02:55:30,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:30,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:31,146 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:31,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869615495] [2021-11-23 02:55:31,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869615495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:31,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:31,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:55:31,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052683966] [2021-11-23 02:55:31,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:31,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:55:31,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:31,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:55:31,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:55:31,153 INFO L87 Difference]: Start difference. First operand 378 states and 577 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-23 02:55:32,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:32,456 INFO L93 Difference]: Finished difference Result 2209 states and 3569 transitions. [2021-11-23 02:55:32,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:55:32,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 70 [2021-11-23 02:55:32,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:32,496 INFO L225 Difference]: With dead ends: 2209 [2021-11-23 02:55:32,497 INFO L226 Difference]: Without dead ends: 1836 [2021-11-23 02:55:32,508 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 [2021-11-23 02:55:32,511 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 1393 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1409 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:32,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1409 Valid, 1179 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 02:55:32,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2021-11-23 02:55:32,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1798. [2021-11-23 02:55:32,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1525 states have (on average 1.5140983606557377) internal successors, (2309), 1533 states have internal predecessors, (2309), 212 states have call successors, (212), 60 states have call predecessors, (212), 60 states have return successors, (334), 205 states have call predecessors, (334), 212 states have call successors, (334) [2021-11-23 02:55:32,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2855 transitions. [2021-11-23 02:55:32,695 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2855 transitions. Word has length 70 [2021-11-23 02:55:32,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:32,696 INFO L470 AbstractCegarLoop]: Abstraction has 1798 states and 2855 transitions. [2021-11-23 02:55:32,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-23 02:55:32,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2855 transitions. [2021-11-23 02:55:32,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 02:55:32,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:32,699 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] [2021-11-23 02:55:32,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:55:32,699 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:32,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:32,700 INFO L85 PathProgramCache]: Analyzing trace with hash -363715809, now seen corresponding path program 1 times [2021-11-23 02:55:32,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:32,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444439543] [2021-11-23 02:55:32,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:32,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:32,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:32,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444439543] [2021-11-23 02:55:32,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444439543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:32,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:32,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:55:32,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162831733] [2021-11-23 02:55:32,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:32,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:55:32,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:32,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:55:32,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:55:32,866 INFO L87 Difference]: Start difference. First operand 1798 states and 2855 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-23 02:55:34,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:34,206 INFO L93 Difference]: Finished difference Result 7117 states and 11663 transitions. [2021-11-23 02:55:34,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:55:34,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 70 [2021-11-23 02:55:34,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:34,272 INFO L225 Difference]: With dead ends: 7117 [2021-11-23 02:55:34,273 INFO L226 Difference]: Without dead ends: 5324 [2021-11-23 02:55:34,290 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 [2021-11-23 02:55:34,299 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 1400 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1406 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:34,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1406 Valid, 1186 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 02:55:34,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5324 states. [2021-11-23 02:55:34,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5324 to 5012. [2021-11-23 02:55:34,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5012 states, 4361 states have (on average 1.5228158679202017) internal successors, (6641), 4295 states have internal predecessors, (6641), 486 states have call successors, (486), 148 states have call predecessors, (486), 164 states have return successors, (1016), 569 states have call predecessors, (1016), 486 states have call successors, (1016) [2021-11-23 02:55:34,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 8143 transitions. [2021-11-23 02:55:34,787 INFO L78 Accepts]: Start accepts. Automaton has 5012 states and 8143 transitions. Word has length 70 [2021-11-23 02:55:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:34,789 INFO L470 AbstractCegarLoop]: Abstraction has 5012 states and 8143 transitions. [2021-11-23 02:55:34,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-23 02:55:34,789 INFO L276 IsEmpty]: Start isEmpty. Operand 5012 states and 8143 transitions. [2021-11-23 02:55:34,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 02:55:34,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:34,798 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] [2021-11-23 02:55:34,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:55:34,799 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:34,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:34,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1830410272, now seen corresponding path program 1 times [2021-11-23 02:55:34,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:34,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27558582] [2021-11-23 02:55:34,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:34,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:34,997 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:34,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27558582] [2021-11-23 02:55:34,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27558582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:34,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:34,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:55:34,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290684681] [2021-11-23 02:55:34,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:35,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:55:35,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:35,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:55:35,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:55:35,002 INFO L87 Difference]: Start difference. First operand 5012 states and 8143 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-23 02:55:36,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:36,713 INFO L93 Difference]: Finished difference Result 18573 states and 31325 transitions. [2021-11-23 02:55:36,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:55:36,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 70 [2021-11-23 02:55:36,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:36,873 INFO L225 Difference]: With dead ends: 18573 [2021-11-23 02:55:36,873 INFO L226 Difference]: Without dead ends: 13566 [2021-11-23 02:55:36,915 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 [2021-11-23 02:55:36,921 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 1364 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:36,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1383 Valid, 1225 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:55:36,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13566 states. [2021-11-23 02:55:37,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13566 to 12864. [2021-11-23 02:55:38,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12864 states, 11367 states have (on average 1.5308348728776282) internal successors, (17401), 11051 states have internal predecessors, (17401), 1076 states have call successors, (1076), 348 states have call predecessors, (1076), 420 states have return successors, (2912), 1465 states have call predecessors, (2912), 1076 states have call successors, (2912) [2021-11-23 02:55:38,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12864 states to 12864 states and 21389 transitions. [2021-11-23 02:55:38,141 INFO L78 Accepts]: Start accepts. Automaton has 12864 states and 21389 transitions. Word has length 70 [2021-11-23 02:55:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:38,141 INFO L470 AbstractCegarLoop]: Abstraction has 12864 states and 21389 transitions. [2021-11-23 02:55:38,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-23 02:55:38,143 INFO L276 IsEmpty]: Start isEmpty. Operand 12864 states and 21389 transitions. [2021-11-23 02:55:38,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 02:55:38,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:38,146 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] [2021-11-23 02:55:38,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:55:38,146 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:38,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:38,147 INFO L85 PathProgramCache]: Analyzing trace with hash 956932577, now seen corresponding path program 1 times [2021-11-23 02:55:38,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:38,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822636043] [2021-11-23 02:55:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:38,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:38,273 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:38,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822636043] [2021-11-23 02:55:38,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822636043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:38,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:38,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:55:38,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822070233] [2021-11-23 02:55:38,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:38,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:55:38,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:38,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:55:38,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:55:38,282 INFO L87 Difference]: Start difference. First operand 12864 states and 21389 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-23 02:55:40,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:40,961 INFO L93 Difference]: Finished difference Result 46885 states and 81599 transitions. [2021-11-23 02:55:40,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:55:40,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 70 [2021-11-23 02:55:40,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:41,434 INFO L225 Difference]: With dead ends: 46885 [2021-11-23 02:55:41,434 INFO L226 Difference]: Without dead ends: 34026 [2021-11-23 02:55:41,533 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 [2021-11-23 02:55:41,543 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 1341 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:41,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1361 Valid, 1252 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 02:55:41,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34026 states. [2021-11-23 02:55:44,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34026 to 32540. [2021-11-23 02:55:44,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32540 states, 29077 states have (on average 1.539945661519414) internal successors, (44777), 27971 states have internal predecessors, (44777), 2386 states have call successors, (2386), 820 states have call predecessors, (2386), 1076 states have return successors, (8280), 3749 states have call predecessors, (8280), 2386 states have call successors, (8280) [2021-11-23 02:55:44,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32540 states to 32540 states and 55443 transitions. [2021-11-23 02:55:44,359 INFO L78 Accepts]: Start accepts. Automaton has 32540 states and 55443 transitions. Word has length 70 [2021-11-23 02:55:44,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:44,359 INFO L470 AbstractCegarLoop]: Abstraction has 32540 states and 55443 transitions. [2021-11-23 02:55:44,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-23 02:55:44,360 INFO L276 IsEmpty]: Start isEmpty. Operand 32540 states and 55443 transitions. [2021-11-23 02:55:44,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 02:55:44,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:44,363 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] [2021-11-23 02:55:44,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:55:44,363 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:44,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:44,364 INFO L85 PathProgramCache]: Analyzing trace with hash 4194, now seen corresponding path program 1 times [2021-11-23 02:55:44,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:44,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677985949] [2021-11-23 02:55:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:44,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:44,649 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:44,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677985949] [2021-11-23 02:55:44,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677985949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:44,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:44,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:55:44,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758143139] [2021-11-23 02:55:44,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:44,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:55:44,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:44,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:55:44,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:55:44,652 INFO L87 Difference]: Start difference. First operand 32540 states and 55443 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-23 02:55:49,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:49,103 INFO L93 Difference]: Finished difference Result 118557 states and 213161 transitions. [2021-11-23 02:55:49,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:55:49,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 70 [2021-11-23 02:55:49,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:50,049 INFO L225 Difference]: With dead ends: 118557 [2021-11-23 02:55:50,049 INFO L226 Difference]: Without dead ends: 86022 [2021-11-23 02:55:50,197 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 [2021-11-23 02:55:50,198 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 1318 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1339 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:50,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1339 Valid, 1279 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 02:55:50,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86022 states. [2021-11-23 02:55:55,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86022 to 82948. [2021-11-23 02:55:55,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82948 states, 74719 states have (on average 1.5505694669361207) internal successors, (115857), 71227 states have internal predecessors, (115857), 5408 states have call successors, (5408), 1980 states have call predecessors, (5408), 2820 states have return successors, (23664), 9741 states have call predecessors, (23664), 5408 states have call successors, (23664) [2021-11-23 02:55:56,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82948 states to 82948 states and 144929 transitions. [2021-11-23 02:55:56,835 INFO L78 Accepts]: Start accepts. Automaton has 82948 states and 144929 transitions. Word has length 70 [2021-11-23 02:55:56,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:56,849 INFO L470 AbstractCegarLoop]: Abstraction has 82948 states and 144929 transitions. [2021-11-23 02:55:56,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-23 02:55:56,849 INFO L276 IsEmpty]: Start isEmpty. Operand 82948 states and 144929 transitions. [2021-11-23 02:55:56,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 02:55:56,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:56,858 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] [2021-11-23 02:55:56,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:55:56,859 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:56,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:56,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1576553565, now seen corresponding path program 1 times [2021-11-23 02:55:56,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:56,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55230693] [2021-11-23 02:55:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:56,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:57,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:57,037 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:57,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55230693] [2021-11-23 02:55:57,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55230693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:57,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:57,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:55:57,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503087624] [2021-11-23 02:55:57,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:57,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:55:57,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:57,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:55:57,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:55:57,040 INFO L87 Difference]: Start difference. First operand 82948 states and 144929 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-23 02:56:05,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:05,547 INFO L93 Difference]: Finished difference Result 303477 states and 563595 transitions. [2021-11-23 02:56:05,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:56:05,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 70 [2021-11-23 02:56:05,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:07,885 INFO L225 Difference]: With dead ends: 303477 [2021-11-23 02:56:07,885 INFO L226 Difference]: Without dead ends: 220534 [2021-11-23 02:56:08,215 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 [2021-11-23 02:56:08,216 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 1295 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1317 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:08,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1317 Valid, 1306 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:56:08,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220534 states. [2021-11-23 02:56:21,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220534 to 214208. [2021-11-23 02:56:22,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214208 states, 193917 states have (on average 1.5628593676676104) internal successors, (303065), 183443 states have internal predecessors, (303065), 12686 states have call successors, (12686), 4948 states have call predecessors, (12686), 7604 states have return successors, (68104), 25817 states have call predecessors, (68104), 12686 states have call successors, (68104) [2021-11-23 02:56:23,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214208 states to 214208 states and 383855 transitions. [2021-11-23 02:56:23,617 INFO L78 Accepts]: Start accepts. Automaton has 214208 states and 383855 transitions. Word has length 70 [2021-11-23 02:56:23,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:23,618 INFO L470 AbstractCegarLoop]: Abstraction has 214208 states and 383855 transitions. [2021-11-23 02:56:23,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-23 02:56:23,619 INFO L276 IsEmpty]: Start isEmpty. Operand 214208 states and 383855 transitions. [2021-11-23 02:56:23,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 02:56:23,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:23,620 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] [2021-11-23 02:56:23,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:56:23,621 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:56:23,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:23,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1045896100, now seen corresponding path program 1 times [2021-11-23 02:56:23,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:56:23,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171774472] [2021-11-23 02:56:23,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:23,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:56:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:23,708 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:56:23,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171774472] [2021-11-23 02:56:23,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171774472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:56:23,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:56:23,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:56:23,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040199233] [2021-11-23 02:56:23,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:56:23,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:56:23,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:56:23,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:56:23,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:56:23,712 INFO L87 Difference]: Start difference. First operand 214208 states and 383855 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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)