./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6497151-7d2e-473b-996c-4c0da88eb275/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6497151-7d2e-473b-996c-4c0da88eb275/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6497151-7d2e-473b-996c-4c0da88eb275/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6497151-7d2e-473b-996c-4c0da88eb275/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6497151-7d2e-473b-996c-4c0da88eb275/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6497151-7d2e-473b-996c-4c0da88eb275/bin/utaipan-G1rejxKTta --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 1493e9da3ad278988eda47a556733ebc5ac5411d3350d76fb478293d9e5d934e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:39:51,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:39:51,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:39:51,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:39:51,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:39:51,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:39:51,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:39:51,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:39:51,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:39:51,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:39:51,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:39:51,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:39:51,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:39:51,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:39:51,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:39:51,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:39:51,793 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:39:51,795 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:39:51,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:39:51,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:39:51,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:39:51,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:39:51,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:39:51,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:39:51,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:39:51,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:39:51,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:39:51,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:39:51,835 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:39:51,836 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:39:51,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:39:51,838 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:39:51,841 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:39:51,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:39:51,845 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:39:51,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:39:51,846 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:39:51,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:39:51,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:39:51,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:39:51,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:39:51,851 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6497151-7d2e-473b-996c-4c0da88eb275/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:39:51,894 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:39:51,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:39:51,895 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:39:51,896 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:39:51,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:39:51,897 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:39:51,898 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:39:51,898 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:39:51,898 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:39:51,899 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:39:51,900 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:39:51,900 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:39:51,901 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:39:51,901 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:39:51,901 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:39:51,901 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:39:51,902 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:39:51,902 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:39:51,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:39:51,903 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:39:51,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:39:51,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:39:51,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:39:51,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:39:51,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:39:51,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:39:51,907 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:39:51,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:39:51,907 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:39:51,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:39:51,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:39:51,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:39:51,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:39:51,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:39:51,909 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:39:51,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:39:51,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:39:51,910 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:39:51,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:39:51,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:39:51,911 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:39:51,911 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_d6497151-7d2e-473b-996c-4c0da88eb275/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6497151-7d2e-473b-996c-4c0da88eb275/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1493e9da3ad278988eda47a556733ebc5ac5411d3350d76fb478293d9e5d934e [2022-10-17 17:39:52,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:39:52,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:39:52,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:39:52,313 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:39:52,314 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:39:52,316 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6497151-7d2e-473b-996c-4c0da88eb275/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2022-10-17 17:39:52,387 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6497151-7d2e-473b-996c-4c0da88eb275/bin/utaipan-G1rejxKTta/data/8b38a6d73/c4cbb1832eff46eb809407b1c322ae64/FLAGa098911a5 [2022-10-17 17:39:53,082 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:39:53,082 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6497151-7d2e-473b-996c-4c0da88eb275/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2022-10-17 17:39:53,113 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6497151-7d2e-473b-996c-4c0da88eb275/bin/utaipan-G1rejxKTta/data/8b38a6d73/c4cbb1832eff46eb809407b1c322ae64/FLAGa098911a5 [2022-10-17 17:39:53,243 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6497151-7d2e-473b-996c-4c0da88eb275/bin/utaipan-G1rejxKTta/data/8b38a6d73/c4cbb1832eff46eb809407b1c322ae64 [2022-10-17 17:39:53,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:39:53,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:39:53,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:39:53,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:39:53,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:39:53,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:39:53" (1/1) ... [2022-10-17 17:39:53,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1706d5d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:53, skipping insertion in model container [2022-10-17 17:39:53,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:39:53" (1/1) ... [2022-10-17 17:39:53,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:39:53,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:39:53,660 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_d6497151-7d2e-473b-996c-4c0da88eb275/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c[11768,11781] [2022-10-17 17:39:53,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:39:53,931 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:39:54,006 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_d6497151-7d2e-473b-996c-4c0da88eb275/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c[11768,11781] [2022-10-17 17:39:54,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:39:54,172 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:39:54,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:54 WrapperNode [2022-10-17 17:39:54,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:39:54,174 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:39:54,174 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:39:54,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:39:54,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:54" (1/1) ... [2022-10-17 17:39:54,218 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:54" (1/1) ... [2022-10-17 17:39:54,283 INFO L138 Inliner]: procedures = 95, calls = 344, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 873 [2022-10-17 17:39:54,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:39:54,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:39:54,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:39:54,285 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:39:54,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:54" (1/1) ... [2022-10-17 17:39:54,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:54" (1/1) ... [2022-10-17 17:39:54,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:54" (1/1) ... [2022-10-17 17:39:54,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:54" (1/1) ... [2022-10-17 17:39:54,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:54" (1/1) ... [2022-10-17 17:39:54,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:54" (1/1) ... [2022-10-17 17:39:54,386 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:54" (1/1) ... [2022-10-17 17:39:54,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:54" (1/1) ... [2022-10-17 17:39:54,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:39:54,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:39:54,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:39:54,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:39:54,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:54" (1/1) ... [2022-10-17 17:39:54,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:39:54,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6497151-7d2e-473b-996c-4c0da88eb275/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:54,445 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6497151-7d2e-473b-996c-4c0da88eb275/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:39:54,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6497151-7d2e-473b-996c-4c0da88eb275/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:39:54,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:39:54,566 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-10-17 17:39:54,566 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-10-17 17:39:54,567 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-10-17 17:39:54,568 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-10-17 17:39:54,568 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-10-17 17:39:54,568 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-10-17 17:39:54,569 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-10-17 17:39:54,569 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-10-17 17:39:54,569 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-10-17 17:39:54,570 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-10-17 17:39:54,570 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-10-17 17:39:54,570 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-10-17 17:39:54,570 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-10-17 17:39:54,570 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-10-17 17:39:54,570 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-10-17 17:39:54,572 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-10-17 17:39:54,572 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-10-17 17:39:54,572 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-10-17 17:39:54,572 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-10-17 17:39:54,572 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-10-17 17:39:54,572 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-10-17 17:39:54,573 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-10-17 17:39:54,573 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-10-17 17:39:54,573 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-10-17 17:39:54,573 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-10-17 17:39:54,573 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-10-17 17:39:54,573 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-10-17 17:39:54,573 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-10-17 17:39:54,574 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-10-17 17:39:54,576 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-10-17 17:39:54,576 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-10-17 17:39:54,576 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-10-17 17:39:54,576 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-10-17 17:39:54,577 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-10-17 17:39:54,577 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-10-17 17:39:54,577 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-10-17 17:39:54,577 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-10-17 17:39:54,577 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-10-17 17:39:54,577 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-10-17 17:39:54,577 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-10-17 17:39:54,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:39:54,578 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-10-17 17:39:54,578 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-10-17 17:39:54,579 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-10-17 17:39:54,580 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-10-17 17:39:54,581 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-10-17 17:39:54,581 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-10-17 17:39:54,582 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-10-17 17:39:54,583 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-10-17 17:39:54,583 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2022-10-17 17:39:54,583 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2022-10-17 17:39:54,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:39:54,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:39:54,584 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-10-17 17:39:54,585 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-10-17 17:39:54,779 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:39:54,781 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:39:56,010 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:39:56,963 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:39:56,964 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 17:39:56,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:39:56 BoogieIcfgContainer [2022-10-17 17:39:56,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:39:56,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:39:56,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:39:56,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:39:56,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:39:53" (1/3) ... [2022-10-17 17:39:56,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a9632b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:39:56, skipping insertion in model container [2022-10-17 17:39:56,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:54" (2/3) ... [2022-10-17 17:39:56,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a9632b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:39:56, skipping insertion in model container [2022-10-17 17:39:56,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:39:56" (3/3) ... [2022-10-17 17:39:56,981 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product30.cil.c [2022-10-17 17:39:57,001 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:39:57,001 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:39:57,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:39:57,109 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@750c0f6d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:39:57,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:39:57,121 INFO L276 IsEmpty]: Start isEmpty. Operand has 378 states, 254 states have (on average 1.5866141732283465) internal successors, (403), 277 states have internal predecessors, (403), 96 states have call successors, (96), 26 states have call predecessors, (96), 26 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) [2022-10-17 17:39:57,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-17 17:39:57,145 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:57,146 INFO L195 NwaCegarLoop]: 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] [2022-10-17 17:39:57,146 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:57,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:57,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1920796370, now seen corresponding path program 1 times [2022-10-17 17:39:57,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:57,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867004115] [2022-10-17 17:39:57,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:57,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:57,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:39:57,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:57,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867004115] [2022-10-17 17:39:57,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867004115] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:57,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:57,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:39:57,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432672376] [2022-10-17 17:39:57,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:57,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:39:57,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:57,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:39:57,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:39:57,808 INFO L87 Difference]: Start difference. First operand has 378 states, 254 states have (on average 1.5866141732283465) internal successors, (403), 277 states have internal predecessors, (403), 96 states have call successors, (96), 26 states have call predecessors, (96), 26 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-10-17 17:39:58,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:58,079 INFO L93 Difference]: Finished difference Result 396 states and 622 transitions. [2022-10-17 17:39:58,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:39:58,082 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 43 [2022-10-17 17:39:58,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:58,111 INFO L225 Difference]: With dead ends: 396 [2022-10-17 17:39:58,111 INFO L226 Difference]: Without dead ends: 374 [2022-10-17 17:39:58,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:39:58,119 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:58,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 549 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:39:58,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-10-17 17:39:58,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2022-10-17 17:39:58,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 252 states have (on average 1.5753968253968254) internal successors, (397), 273 states have internal predecessors, (397), 96 states have call successors, (96), 26 states have call predecessors, (96), 25 states have return successors, (91), 88 states have call predecessors, (91), 91 states have call successors, (91) [2022-10-17 17:39:58,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 584 transitions. [2022-10-17 17:39:58,215 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 584 transitions. Word has length 43 [2022-10-17 17:39:58,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:58,217 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 584 transitions. [2022-10-17 17:39:58,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-10-17 17:39:58,217 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 584 transitions. [2022-10-17 17:39:58,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-17 17:39:58,222 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:58,222 INFO L195 NwaCegarLoop]: 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] [2022-10-17 17:39:58,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:39:58,223 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:58,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:58,224 INFO L85 PathProgramCache]: Analyzing trace with hash -238457962, now seen corresponding path program 1 times [2022-10-17 17:39:58,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:58,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084693853] [2022-10-17 17:39:58,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:58,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:39:58,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:58,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084693853] [2022-10-17 17:39:58,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084693853] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:58,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:58,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:39:58,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611032610] [2022-10-17 17:39:58,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:58,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:39:58,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:58,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:39:58,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:39:58,774 INFO L87 Difference]: Start difference. First operand 374 states and 584 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-10-17 17:40:00,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:00,999 INFO L93 Difference]: Finished difference Result 1210 states and 1926 transitions. [2022-10-17 17:40:01,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:40:01,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2022-10-17 17:40:01,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:01,010 INFO L225 Difference]: With dead ends: 1210 [2022-10-17 17:40:01,011 INFO L226 Difference]: Without dead ends: 852 [2022-10-17 17:40:01,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:40:01,017 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 1182 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:01,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1246 Valid, 1127 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-10-17 17:40:01,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-10-17 17:40:01,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 755. [2022-10-17 17:40:01,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 528 states have (on average 1.5909090909090908) internal successors, (840), 558 states have internal predecessors, (840), 179 states have call successors, (179), 46 states have call predecessors, (179), 47 states have return successors, (181), 163 states have call predecessors, (181), 174 states have call successors, (181) [2022-10-17 17:40:01,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1200 transitions. [2022-10-17 17:40:01,114 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1200 transitions. Word has length 44 [2022-10-17 17:40:01,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:01,114 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1200 transitions. [2022-10-17 17:40:01,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-10-17 17:40:01,115 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1200 transitions. [2022-10-17 17:40:01,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-10-17 17:40:01,122 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:01,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:01,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:40:01,123 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:01,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:01,124 INFO L85 PathProgramCache]: Analyzing trace with hash -984985736, now seen corresponding path program 1 times [2022-10-17 17:40:01,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:01,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347702057] [2022-10-17 17:40:01,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:01,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:01,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:01,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347702057] [2022-10-17 17:40:01,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347702057] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:01,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:40:01,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 17:40:01,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224427483] [2022-10-17 17:40:01,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:01,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:40:01,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:01,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:40:01,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:40:01,652 INFO L87 Difference]: Start difference. First operand 755 states and 1200 transitions. Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-10-17 17:40:04,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:04,887 INFO L93 Difference]: Finished difference Result 2572 states and 4125 transitions. [2022-10-17 17:40:04,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-10-17 17:40:04,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2022-10-17 17:40:04,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:04,909 INFO L225 Difference]: With dead ends: 2572 [2022-10-17 17:40:04,909 INFO L226 Difference]: Without dead ends: 1833 [2022-10-17 17:40:04,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-10-17 17:40:04,924 INFO L413 NwaCegarLoop]: 888 mSDtfsCounter, 1261 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 3935 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1333 SdHoareTripleChecker+Valid, 2351 SdHoareTripleChecker+Invalid, 4589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 3935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:04,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1333 Valid, 2351 Invalid, 4589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 3935 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-10-17 17:40:04,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2022-10-17 17:40:05,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1680. [2022-10-17 17:40:05,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1143 states have (on average 1.5643044619422573) internal successors, (1788), 1215 states have internal predecessors, (1788), 439 states have call successors, (439), 85 states have call predecessors, (439), 97 states have return successors, (458), 412 states have call predecessors, (458), 434 states have call successors, (458) [2022-10-17 17:40:05,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2685 transitions. [2022-10-17 17:40:05,139 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2685 transitions. Word has length 75 [2022-10-17 17:40:05,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:05,139 INFO L495 AbstractCegarLoop]: Abstraction has 1680 states and 2685 transitions. [2022-10-17 17:40:05,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-10-17 17:40:05,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2685 transitions. [2022-10-17 17:40:05,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-10-17 17:40:05,144 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:05,145 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:05,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:40:05,145 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:05,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:05,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1337377476, now seen corresponding path program 1 times [2022-10-17 17:40:05,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:05,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813138725] [2022-10-17 17:40:05,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:05,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:05,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:05,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:05,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813138725] [2022-10-17 17:40:05,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813138725] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:05,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:40:05,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:40:05,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100375649] [2022-10-17 17:40:05,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:05,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:40:05,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:05,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:40:05,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:40:05,485 INFO L87 Difference]: Start difference. First operand 1680 states and 2685 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-10-17 17:40:05,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:05,967 INFO L93 Difference]: Finished difference Result 3915 states and 6340 transitions. [2022-10-17 17:40:05,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:40:05,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 76 [2022-10-17 17:40:05,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:05,997 INFO L225 Difference]: With dead ends: 3915 [2022-10-17 17:40:05,997 INFO L226 Difference]: Without dead ends: 2253 [2022-10-17 17:40:06,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:40:06,017 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 177 mSDsluCounter, 1751 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:06,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2240 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:40:06,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2022-10-17 17:40:06,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 1698. [2022-10-17 17:40:06,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1161 states have (on average 1.5555555555555556) internal successors, (1806), 1233 states have internal predecessors, (1806), 439 states have call successors, (439), 85 states have call predecessors, (439), 97 states have return successors, (458), 412 states have call predecessors, (458), 434 states have call successors, (458) [2022-10-17 17:40:06,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 2703 transitions. [2022-10-17 17:40:06,213 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 2703 transitions. Word has length 76 [2022-10-17 17:40:06,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:06,215 INFO L495 AbstractCegarLoop]: Abstraction has 1698 states and 2703 transitions. [2022-10-17 17:40:06,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-10-17 17:40:06,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 2703 transitions. [2022-10-17 17:40:06,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-10-17 17:40:06,219 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:06,220 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 17:40:06,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:40:06,220 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:06,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:06,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1193998400, now seen corresponding path program 1 times [2022-10-17 17:40:06,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:06,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144131849] [2022-10-17 17:40:06,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:06,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:40:06,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:06,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144131849] [2022-10-17 17:40:06,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144131849] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:06,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:40:06,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 17:40:06,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124035705] [2022-10-17 17:40:06,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:06,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 17:40:06,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:06,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 17:40:06,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:40:06,814 INFO L87 Difference]: Start difference. First operand 1698 states and 2703 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-10-17 17:40:10,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:10,129 INFO L93 Difference]: Finished difference Result 4769 states and 7618 transitions. [2022-10-17 17:40:10,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-17 17:40:10,130 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 78 [2022-10-17 17:40:10,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:10,159 INFO L225 Difference]: With dead ends: 4769 [2022-10-17 17:40:10,159 INFO L226 Difference]: Without dead ends: 3089 [2022-10-17 17:40:10,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-10-17 17:40:10,172 INFO L413 NwaCegarLoop]: 746 mSDtfsCounter, 1710 mSDsluCounter, 2097 mSDsCounter, 0 mSdLazyCounter, 3530 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1770 SdHoareTripleChecker+Valid, 2710 SdHoareTripleChecker+Invalid, 4124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 3530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:10,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1770 Valid, 2710 Invalid, 4124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 3530 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-10-17 17:40:10,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2022-10-17 17:40:10,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 2954. [2022-10-17 17:40:10,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2093 states have (on average 1.5805064500716675) internal successors, (3308), 2184 states have internal predecessors, (3308), 680 states have call successors, (680), 150 states have call predecessors, (680), 180 states have return successors, (743), 663 states have call predecessors, (743), 675 states have call successors, (743) [2022-10-17 17:40:10,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 4731 transitions. [2022-10-17 17:40:10,474 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 4731 transitions. Word has length 78 [2022-10-17 17:40:10,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:10,475 INFO L495 AbstractCegarLoop]: Abstraction has 2954 states and 4731 transitions. [2022-10-17 17:40:10,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-10-17 17:40:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 4731 transitions. [2022-10-17 17:40:10,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-10-17 17:40:10,478 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:10,479 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 17:40:10,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:40:10,479 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:10,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:10,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1996315124, now seen corresponding path program 1 times [2022-10-17 17:40:10,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:10,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402786568] [2022-10-17 17:40:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:10,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:40:10,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:10,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402786568] [2022-10-17 17:40:10,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402786568] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:10,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:40:10,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:40:10,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756424424] [2022-10-17 17:40:10,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:10,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:40:10,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:10,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:40:10,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:40:10,779 INFO L87 Difference]: Start difference. First operand 2954 states and 4731 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:40:11,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:11,229 INFO L93 Difference]: Finished difference Result 5282 states and 8482 transitions. [2022-10-17 17:40:11,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:40:11,229 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2022-10-17 17:40:11,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:11,256 INFO L225 Difference]: With dead ends: 5282 [2022-10-17 17:40:11,256 INFO L226 Difference]: Without dead ends: 3066 [2022-10-17 17:40:11,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:40:11,272 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 7 mSDsluCounter, 2878 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3242 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:11,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3242 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:40:11,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2022-10-17 17:40:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 3024. [2022-10-17 17:40:11,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3024 states, 2143 states have (on average 1.566962202519832) internal successors, (3358), 2234 states have internal predecessors, (3358), 680 states have call successors, (680), 150 states have call predecessors, (680), 200 states have return successors, (793), 683 states have call predecessors, (793), 675 states have call successors, (793) [2022-10-17 17:40:11,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3024 states to 3024 states and 4831 transitions. [2022-10-17 17:40:11,600 INFO L78 Accepts]: Start accepts. Automaton has 3024 states and 4831 transitions. Word has length 83 [2022-10-17 17:40:11,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:11,601 INFO L495 AbstractCegarLoop]: Abstraction has 3024 states and 4831 transitions. [2022-10-17 17:40:11,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:40:11,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3024 states and 4831 transitions. [2022-10-17 17:40:11,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-10-17 17:40:11,605 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:11,605 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 17:40:11,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:40:11,605 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:11,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:11,606 INFO L85 PathProgramCache]: Analyzing trace with hash -591162, now seen corresponding path program 1 times [2022-10-17 17:40:11,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:11,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63001628] [2022-10-17 17:40:11,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:11,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:40:11,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:11,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63001628] [2022-10-17 17:40:11,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63001628] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:11,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:40:11,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:40:11,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113198565] [2022-10-17 17:40:11,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:11,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:40:11,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:11,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:40:11,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:40:11,902 INFO L87 Difference]: Start difference. First operand 3024 states and 4831 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:40:12,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:12,318 INFO L93 Difference]: Finished difference Result 5388 states and 8622 transitions. [2022-10-17 17:40:12,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:40:12,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 82 [2022-10-17 17:40:12,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:12,346 INFO L225 Difference]: With dead ends: 5388 [2022-10-17 17:40:12,346 INFO L226 Difference]: Without dead ends: 3116 [2022-10-17 17:40:12,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:40:12,420 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 6 mSDsluCounter, 2893 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3261 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:12,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3261 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:40:12,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2022-10-17 17:40:12,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 3034. [2022-10-17 17:40:12,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 2153 states have (on average 1.564328843474222) internal successors, (3368), 2234 states have internal predecessors, (3368), 680 states have call successors, (680), 150 states have call predecessors, (680), 200 states have return successors, (793), 693 states have call predecessors, (793), 675 states have call successors, (793) [2022-10-17 17:40:12,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4841 transitions. [2022-10-17 17:40:12,687 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4841 transitions. Word has length 82 [2022-10-17 17:40:12,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:12,688 INFO L495 AbstractCegarLoop]: Abstraction has 3034 states and 4841 transitions. [2022-10-17 17:40:12,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:40:12,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4841 transitions. [2022-10-17 17:40:12,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-10-17 17:40:12,692 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:12,692 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 17:40:12,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:40:12,692 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:12,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:12,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1877902356, now seen corresponding path program 1 times [2022-10-17 17:40:12,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:12,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098219960] [2022-10-17 17:40:12,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:12,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:12,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:40:12,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:12,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098219960] [2022-10-17 17:40:12,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098219960] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:12,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:40:12,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:40:12,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88070805] [2022-10-17 17:40:12,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:12,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:40:12,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:12,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:40:12,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:40:12,994 INFO L87 Difference]: Start difference. First operand 3034 states and 4841 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:40:13,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:13,481 INFO L93 Difference]: Finished difference Result 5406 states and 8640 transitions. [2022-10-17 17:40:13,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:40:13,482 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2022-10-17 17:40:13,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:13,511 INFO L225 Difference]: With dead ends: 5406 [2022-10-17 17:40:13,511 INFO L226 Difference]: Without dead ends: 3126 [2022-10-17 17:40:13,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:40:13,529 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 6 mSDsluCounter, 2897 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3266 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:13,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3266 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:40:13,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2022-10-17 17:40:13,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 3044. [2022-10-17 17:40:13,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 2163 states have (on average 1.5617198335644937) internal successors, (3378), 2234 states have internal predecessors, (3378), 680 states have call successors, (680), 150 states have call predecessors, (680), 200 states have return successors, (793), 703 states have call predecessors, (793), 675 states have call successors, (793) [2022-10-17 17:40:13,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 4851 transitions. [2022-10-17 17:40:13,842 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 4851 transitions. Word has length 83 [2022-10-17 17:40:13,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:13,843 INFO L495 AbstractCegarLoop]: Abstraction has 3044 states and 4851 transitions. [2022-10-17 17:40:13,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:40:13,844 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 4851 transitions. [2022-10-17 17:40:13,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-10-17 17:40:13,848 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:13,848 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 17:40:13,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 17:40:13,849 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:13,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:13,849 INFO L85 PathProgramCache]: Analyzing trace with hash -385724476, now seen corresponding path program 1 times [2022-10-17 17:40:13,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:13,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974445712] [2022-10-17 17:40:13,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:13,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:40:14,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:14,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974445712] [2022-10-17 17:40:14,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974445712] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:14,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:40:14,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 17:40:14,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560356443] [2022-10-17 17:40:14,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:14,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:40:14,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:14,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:40:14,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:40:14,307 INFO L87 Difference]: Start difference. First operand 3044 states and 4851 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) [2022-10-17 17:40:16,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:16,837 INFO L93 Difference]: Finished difference Result 7552 states and 12115 transitions. [2022-10-17 17:40:16,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:40:16,838 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) Word has length 87 [2022-10-17 17:40:16,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:16,881 INFO L225 Difference]: With dead ends: 7552 [2022-10-17 17:40:16,881 INFO L226 Difference]: Without dead ends: 5022 [2022-10-17 17:40:16,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:40:16,903 INFO L413 NwaCegarLoop]: 825 mSDtfsCounter, 1658 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 2019 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1813 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 2722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 2019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:16,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1813 Valid, 1694 Invalid, 2722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 2019 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-10-17 17:40:16,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5022 states. [2022-10-17 17:40:17,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5022 to 4910. [2022-10-17 17:40:17,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4910 states, 3416 states have (on average 1.5199063231850116) internal successors, (5192), 3557 states have internal predecessors, (5192), 1147 states have call successors, (1147), 266 states have call predecessors, (1147), 346 states have return successors, (1367), 1163 states have call predecessors, (1367), 1142 states have call successors, (1367) [2022-10-17 17:40:17,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 7706 transitions. [2022-10-17 17:40:17,456 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 7706 transitions. Word has length 87 [2022-10-17 17:40:17,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:17,456 INFO L495 AbstractCegarLoop]: Abstraction has 4910 states and 7706 transitions. [2022-10-17 17:40:17,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) [2022-10-17 17:40:17,457 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 7706 transitions. [2022-10-17 17:40:17,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-10-17 17:40:17,461 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:17,461 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 17:40:17,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 17:40:17,461 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:17,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:17,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1409040281, now seen corresponding path program 1 times [2022-10-17 17:40:17,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:17,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598228833] [2022-10-17 17:40:17,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:17,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:40:18,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:18,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598228833] [2022-10-17 17:40:18,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598228833] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:18,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:40:18,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-10-17 17:40:18,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511021334] [2022-10-17 17:40:18,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:18,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-17 17:40:18,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:18,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-17 17:40:18,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-10-17 17:40:18,121 INFO L87 Difference]: Start difference. First operand 4910 states and 7706 transitions. Second operand has 13 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 8 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15)