./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.16.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8c5b74-a578-4fe6-9f5e-04bd62bf7d2f/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8c5b74-a578-4fe6-9f5e-04bd62bf7d2f/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8c5b74-a578-4fe6-9f5e-04bd62bf7d2f/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8c5b74-a578-4fe6-9f5e-04bd62bf7d2f/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.16.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8c5b74-a578-4fe6-9f5e-04bd62bf7d2f/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8c5b74-a578-4fe6-9f5e-04bd62bf7d2f/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 45519c8273c53879cf6a170ed74d5bc0be814b1f3243ce6c30d1d3efe9a3cf32 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:56:44,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:56:44,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:56:44,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:56:44,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:56:44,915 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:56:44,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:56:44,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:56:44,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:56:44,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:56:44,923 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:56:44,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:56:44,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:56:44,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:56:44,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:56:44,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:56:44,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:56:44,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:56:44,934 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:56:44,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:56:44,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:56:44,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:56:44,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:56:44,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:56:44,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:56:44,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:56:44,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:56:44,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:56:44,948 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:56:44,949 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:56:44,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:56:44,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:56:44,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:56:44,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:56:44,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:56:44,959 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:56:44,960 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:56:44,960 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:56:44,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:56:44,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:56:44,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:56:44,963 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8c5b74-a578-4fe6-9f5e-04bd62bf7d2f/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 17:56:45,011 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:56:45,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:56:45,012 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:56:45,012 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:56:45,018 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:56:45,019 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:56:45,019 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:56:45,019 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:56:45,019 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:56:45,019 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:56:45,020 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:56:45,020 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:56:45,020 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:56:45,020 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:56:45,020 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:56:45,020 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:56:45,021 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:56:45,021 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:56:45,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:56:45,022 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:56:45,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:56:45,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:56:45,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:56:45,022 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:56:45,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:56:45,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:56:45,023 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:56:45,023 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:56:45,023 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:56:45,023 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:56:45,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:56:45,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:56:45,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:56:45,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:56:45,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:56:45,025 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:56:45,025 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:56:45,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:56:45,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:56:45,025 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:56:45,026 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:56:45,026 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8c5b74-a578-4fe6-9f5e-04bd62bf7d2f/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8c5b74-a578-4fe6-9f5e-04bd62bf7d2f/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45519c8273c53879cf6a170ed74d5bc0be814b1f3243ce6c30d1d3efe9a3cf32 [2021-11-25 17:56:45,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:56:45,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:56:45,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:56:45,313 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:56:45,314 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:56:45,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8c5b74-a578-4fe6-9f5e-04bd62bf7d2f/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/systemc/transmitter.16.cil.c [2021-11-25 17:56:45,402 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8c5b74-a578-4fe6-9f5e-04bd62bf7d2f/bin/utaipan-eEHZpOm5b7/data/b6884467f/3c3095e4b5b447509dce076764b53981/FLAGd916e9885 [2021-11-25 17:56:45,857 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:56:45,858 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8c5b74-a578-4fe6-9f5e-04bd62bf7d2f/sv-benchmarks/c/systemc/transmitter.16.cil.c [2021-11-25 17:56:45,893 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8c5b74-a578-4fe6-9f5e-04bd62bf7d2f/bin/utaipan-eEHZpOm5b7/data/b6884467f/3c3095e4b5b447509dce076764b53981/FLAGd916e9885 [2021-11-25 17:56:46,210 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8c5b74-a578-4fe6-9f5e-04bd62bf7d2f/bin/utaipan-eEHZpOm5b7/data/b6884467f/3c3095e4b5b447509dce076764b53981 [2021-11-25 17:56:46,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:56:46,214 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:56:46,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:56:46,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:56:46,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:56:46,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:56:46" (1/1) ... [2021-11-25 17:56:46,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d853ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:46, skipping insertion in model container [2021-11-25 17:56:46,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:56:46" (1/1) ... [2021-11-25 17:56:46,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:56:46,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:56:46,465 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_3f8c5b74-a578-4fe6-9f5e-04bd62bf7d2f/sv-benchmarks/c/systemc/transmitter.16.cil.c[706,719] [2021-11-25 17:56:46,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:56:46,659 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:56:46,670 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_3f8c5b74-a578-4fe6-9f5e-04bd62bf7d2f/sv-benchmarks/c/systemc/transmitter.16.cil.c[706,719] [2021-11-25 17:56:46,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:56:46,799 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:56:46,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:46 WrapperNode [2021-11-25 17:56:46,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:56:46,801 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:56:46,801 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:56:46,801 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:56:46,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:46" (1/1) ... [2021-11-25 17:56:46,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:46" (1/1) ... [2021-11-25 17:56:46,911 INFO L137 Inliner]: procedures = 56, calls = 71, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 945 [2021-11-25 17:56:46,919 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:56:46,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:56:46,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:56:46,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:56:46,929 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:46" (1/1) ... [2021-11-25 17:56:46,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:46" (1/1) ... [2021-11-25 17:56:46,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:46" (1/1) ... [2021-11-25 17:56:46,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:46" (1/1) ... [2021-11-25 17:56:46,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:46" (1/1) ... [2021-11-25 17:56:46,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:46" (1/1) ... [2021-11-25 17:56:46,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:46" (1/1) ... [2021-11-25 17:56:47,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:56:47,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:56:47,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:56:47,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:56:47,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:46" (1/1) ... [2021-11-25 17:56:47,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:56:47,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8c5b74-a578-4fe6-9f5e-04bd62bf7d2f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:56:47,059 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8c5b74-a578-4fe6-9f5e-04bd62bf7d2f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:56:47,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8c5b74-a578-4fe6-9f5e-04bd62bf7d2f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:56:47,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:56:47,117 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-25 17:56:47,117 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-25 17:56:47,117 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-25 17:56:47,117 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-25 17:56:47,117 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-25 17:56:47,118 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-25 17:56:47,118 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-25 17:56:47,118 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-25 17:56:47,118 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-25 17:56:47,118 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-25 17:56:47,119 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-25 17:56:47,119 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-25 17:56:47,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:56:47,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:56:47,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:56:47,268 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:56:47,270 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:56:48,191 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:56:48,642 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:56:48,642 INFO L301 CfgBuilder]: Removed 18 assume(true) statements. [2021-11-25 17:56:48,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:56:48 BoogieIcfgContainer [2021-11-25 17:56:48,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:56:48,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:56:48,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:56:48,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:56:48,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:56:46" (1/3) ... [2021-11-25 17:56:48,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9490a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:56:48, skipping insertion in model container [2021-11-25 17:56:48,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:56:46" (2/3) ... [2021-11-25 17:56:48,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9490a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:56:48, skipping insertion in model container [2021-11-25 17:56:48,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:56:48" (3/3) ... [2021-11-25 17:56:48,654 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.16.cil.c [2021-11-25 17:56:48,659 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:56:48,659 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 17:56:48,739 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:56:48,746 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 17:56:48,746 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 17:56:48,769 INFO L276 IsEmpty]: Start isEmpty. Operand has 197 states, 163 states have (on average 1.5521472392638036) internal successors, (253), 165 states have internal predecessors, (253), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-25 17:56:48,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 17:56:48,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:48,780 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:48,780 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:56:48,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:48,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1439967137, now seen corresponding path program 1 times [2021-11-25 17:56:48,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:48,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359421126] [2021-11-25 17:56:48,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:48,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:49,197 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:49,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359421126] [2021-11-25 17:56:49,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359421126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:49,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:49,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:56:49,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764624939] [2021-11-25 17:56:49,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:49,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:56:49,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:49,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:56:49,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:56:49,237 INFO L87 Difference]: Start difference. First operand has 197 states, 163 states have (on average 1.5521472392638036) internal successors, (253), 165 states have internal predecessors, (253), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:56:49,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:49,792 INFO L93 Difference]: Finished difference Result 578 states and 911 transitions. [2021-11-25 17:56:49,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:56:49,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2021-11-25 17:56:49,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:49,809 INFO L225 Difference]: With dead ends: 578 [2021-11-25 17:56:49,809 INFO L226 Difference]: Without dead ends: 382 [2021-11-25 17:56:49,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:56:49,820 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 533 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:49,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 850 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:56:49,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-25 17:56:49,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 378. [2021-11-25 17:56:49,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 317 states have (on average 1.5173501577287065) internal successors, (481), 319 states have internal predecessors, (481), 48 states have call successors, (48), 12 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-25 17:56:49,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 577 transitions. [2021-11-25 17:56:49,906 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 577 transitions. Word has length 70 [2021-11-25 17:56:49,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:49,906 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 577 transitions. [2021-11-25 17:56:49,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:56:49,907 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 577 transitions. [2021-11-25 17:56:49,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 17:56:49,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:49,910 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:49,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 17:56:49,911 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:56:49,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:49,912 INFO L85 PathProgramCache]: Analyzing trace with hash -466517056, now seen corresponding path program 1 times [2021-11-25 17:56:49,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:49,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498389524] [2021-11-25 17:56:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:49,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:50,129 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:50,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498389524] [2021-11-25 17:56:50,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498389524] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:50,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:50,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:56:50,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286573781] [2021-11-25 17:56:50,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:50,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:56:50,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:50,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:56:50,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:56:50,135 INFO L87 Difference]: Start difference. First operand 378 states and 577 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:56:51,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:51,108 INFO L93 Difference]: Finished difference Result 2209 states and 3569 transitions. [2021-11-25 17:56:51,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:56:51,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2021-11-25 17:56:51,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:51,170 INFO L225 Difference]: With dead ends: 2209 [2021-11-25 17:56:51,170 INFO L226 Difference]: Without dead ends: 1836 [2021-11-25 17:56:51,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:56:51,177 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 1393 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1409 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:51,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1409 Valid, 1179 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 17:56:51,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2021-11-25 17:56:51,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1798. [2021-11-25 17:56:51,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1525 states have (on average 1.5140983606557377) internal successors, (2309), 1533 states have internal predecessors, (2309), 212 states have call successors, (212), 60 states have call predecessors, (212), 60 states have return successors, (334), 205 states have call predecessors, (334), 212 states have call successors, (334) [2021-11-25 17:56:51,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2855 transitions. [2021-11-25 17:56:51,321 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2855 transitions. Word has length 70 [2021-11-25 17:56:51,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:51,321 INFO L470 AbstractCegarLoop]: Abstraction has 1798 states and 2855 transitions. [2021-11-25 17:56:51,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:56:51,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2855 transitions. [2021-11-25 17:56:51,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 17:56:51,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:51,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:51,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 17:56:51,325 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:56:51,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:51,326 INFO L85 PathProgramCache]: Analyzing trace with hash -363715809, now seen corresponding path program 1 times [2021-11-25 17:56:51,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:51,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457132986] [2021-11-25 17:56:51,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:51,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:51,419 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:51,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457132986] [2021-11-25 17:56:51,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457132986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:51,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:51,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:56:51,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724861257] [2021-11-25 17:56:51,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:51,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:56:51,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:51,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:56:51,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:56:51,422 INFO L87 Difference]: Start difference. First operand 1798 states and 2855 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:56:52,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:52,475 INFO L93 Difference]: Finished difference Result 7117 states and 11663 transitions. [2021-11-25 17:56:52,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:56:52,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2021-11-25 17:56:52,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:52,560 INFO L225 Difference]: With dead ends: 7117 [2021-11-25 17:56:52,560 INFO L226 Difference]: Without dead ends: 5324 [2021-11-25 17:56:52,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:56:52,591 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 1400 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1406 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:52,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1406 Valid, 1186 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 17:56:52,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5324 states. [2021-11-25 17:56:52,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5324 to 5012. [2021-11-25 17:56:52,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5012 states, 4361 states have (on average 1.5228158679202017) internal successors, (6641), 4295 states have internal predecessors, (6641), 486 states have call successors, (486), 148 states have call predecessors, (486), 164 states have return successors, (1016), 569 states have call predecessors, (1016), 486 states have call successors, (1016) [2021-11-25 17:56:53,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 8143 transitions. [2021-11-25 17:56:53,094 INFO L78 Accepts]: Start accepts. Automaton has 5012 states and 8143 transitions. Word has length 70 [2021-11-25 17:56:53,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:53,096 INFO L470 AbstractCegarLoop]: Abstraction has 5012 states and 8143 transitions. [2021-11-25 17:56:53,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:56:53,097 INFO L276 IsEmpty]: Start isEmpty. Operand 5012 states and 8143 transitions. [2021-11-25 17:56:53,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 17:56:53,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:53,104 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:53,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 17:56:53,105 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:56:53,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:53,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1830410272, now seen corresponding path program 1 times [2021-11-25 17:56:53,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:53,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422138708] [2021-11-25 17:56:53,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:53,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:53,241 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:53,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422138708] [2021-11-25 17:56:53,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422138708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:53,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:53,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:56:53,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824050171] [2021-11-25 17:56:53,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:53,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:56:53,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:53,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:56:53,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:56:53,247 INFO L87 Difference]: Start difference. First operand 5012 states and 8143 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:56:54,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:54,674 INFO L93 Difference]: Finished difference Result 18573 states and 31325 transitions. [2021-11-25 17:56:54,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:56:54,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2021-11-25 17:56:54,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:54,808 INFO L225 Difference]: With dead ends: 18573 [2021-11-25 17:56:54,808 INFO L226 Difference]: Without dead ends: 13566 [2021-11-25 17:56:54,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:56:54,851 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 1364 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:54,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1383 Valid, 1225 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 17:56:54,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13566 states. [2021-11-25 17:56:55,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13566 to 12864. [2021-11-25 17:56:55,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12864 states, 11367 states have (on average 1.5308348728776282) internal successors, (17401), 11051 states have internal predecessors, (17401), 1076 states have call successors, (1076), 348 states have call predecessors, (1076), 420 states have return successors, (2912), 1465 states have call predecessors, (2912), 1076 states have call successors, (2912) [2021-11-25 17:56:55,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12864 states to 12864 states and 21389 transitions. [2021-11-25 17:56:55,895 INFO L78 Accepts]: Start accepts. Automaton has 12864 states and 21389 transitions. Word has length 70 [2021-11-25 17:56:55,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:55,896 INFO L470 AbstractCegarLoop]: Abstraction has 12864 states and 21389 transitions. [2021-11-25 17:56:55,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:56:55,897 INFO L276 IsEmpty]: Start isEmpty. Operand 12864 states and 21389 transitions. [2021-11-25 17:56:55,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 17:56:55,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:55,899 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:55,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 17:56:55,899 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:56:55,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:55,900 INFO L85 PathProgramCache]: Analyzing trace with hash 956932577, now seen corresponding path program 1 times [2021-11-25 17:56:55,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:55,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752275663] [2021-11-25 17:56:55,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:55,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:55,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:55,981 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:55,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752275663] [2021-11-25 17:56:55,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752275663] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:55,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:55,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:56:55,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300432047] [2021-11-25 17:56:55,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:55,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:56:55,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:55,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:56:55,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:56:55,984 INFO L87 Difference]: Start difference. First operand 12864 states and 21389 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:56:58,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:58,250 INFO L93 Difference]: Finished difference Result 46885 states and 81599 transitions. [2021-11-25 17:56:58,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:56:58,251 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2021-11-25 17:56:58,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:58,562 INFO L225 Difference]: With dead ends: 46885 [2021-11-25 17:56:58,562 INFO L226 Difference]: Without dead ends: 34026 [2021-11-25 17:56:58,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:56:58,661 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 1341 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:58,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1361 Valid, 1252 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 17:56:58,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34026 states. [2021-11-25 17:57:00,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34026 to 32540. [2021-11-25 17:57:00,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32540 states, 29077 states have (on average 1.539945661519414) internal successors, (44777), 27971 states have internal predecessors, (44777), 2386 states have call successors, (2386), 820 states have call predecessors, (2386), 1076 states have return successors, (8280), 3749 states have call predecessors, (8280), 2386 states have call successors, (8280) [2021-11-25 17:57:01,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32540 states to 32540 states and 55443 transitions. [2021-11-25 17:57:01,154 INFO L78 Accepts]: Start accepts. Automaton has 32540 states and 55443 transitions. Word has length 70 [2021-11-25 17:57:01,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:01,166 INFO L470 AbstractCegarLoop]: Abstraction has 32540 states and 55443 transitions. [2021-11-25 17:57:01,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:57:01,167 INFO L276 IsEmpty]: Start isEmpty. Operand 32540 states and 55443 transitions. [2021-11-25 17:57:01,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 17:57:01,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:01,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:57:01,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 17:57:01,169 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:57:01,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:01,170 INFO L85 PathProgramCache]: Analyzing trace with hash 4194, now seen corresponding path program 1 times [2021-11-25 17:57:01,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:01,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021202324] [2021-11-25 17:57:01,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:01,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:57:01,289 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:01,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021202324] [2021-11-25 17:57:01,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021202324] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:01,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:57:01,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:57:01,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586778713] [2021-11-25 17:57:01,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:01,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:57:01,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:01,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:57:01,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:57:01,293 INFO L87 Difference]: Start difference. First operand 32540 states and 55443 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:57:05,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:05,353 INFO L93 Difference]: Finished difference Result 118557 states and 213161 transitions. [2021-11-25 17:57:05,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:57:05,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2021-11-25 17:57:05,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:06,134 INFO L225 Difference]: With dead ends: 118557 [2021-11-25 17:57:06,134 INFO L226 Difference]: Without dead ends: 86022 [2021-11-25 17:57:06,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:57:06,261 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 1318 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1339 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:06,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1339 Valid, 1279 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 17:57:06,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86022 states. [2021-11-25 17:57:11,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86022 to 82948. [2021-11-25 17:57:11,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82948 states, 74719 states have (on average 1.5505694669361207) internal successors, (115857), 71227 states have internal predecessors, (115857), 5408 states have call successors, (5408), 1980 states have call predecessors, (5408), 2820 states have return successors, (23664), 9741 states have call predecessors, (23664), 5408 states have call successors, (23664) [2021-11-25 17:57:11,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82948 states to 82948 states and 144929 transitions. [2021-11-25 17:57:11,978 INFO L78 Accepts]: Start accepts. Automaton has 82948 states and 144929 transitions. Word has length 70 [2021-11-25 17:57:11,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:11,980 INFO L470 AbstractCegarLoop]: Abstraction has 82948 states and 144929 transitions. [2021-11-25 17:57:11,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:57:11,980 INFO L276 IsEmpty]: Start isEmpty. Operand 82948 states and 144929 transitions. [2021-11-25 17:57:11,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 17:57:11,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:11,981 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:57:11,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 17:57:11,982 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:57:11,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:11,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1576553565, now seen corresponding path program 1 times [2021-11-25 17:57:11,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:11,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510985359] [2021-11-25 17:57:11,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:11,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:57:12,084 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:12,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510985359] [2021-11-25 17:57:12,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510985359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:12,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:57:12,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:57:12,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640677561] [2021-11-25 17:57:12,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:12,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:57:12,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:12,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:57:12,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:57:12,087 INFO L87 Difference]: Start difference. First operand 82948 states and 144929 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:57:19,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:19,592 INFO L93 Difference]: Finished difference Result 303477 states and 563595 transitions. [2021-11-25 17:57:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:57:19,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2021-11-25 17:57:19,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:21,382 INFO L225 Difference]: With dead ends: 303477 [2021-11-25 17:57:21,383 INFO L226 Difference]: Without dead ends: 220534 [2021-11-25 17:57:21,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:57:21,679 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 1295 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1317 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:21,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1317 Valid, 1306 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 17:57:21,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220534 states. [2021-11-25 17:57:33,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220534 to 214208. [2021-11-25 17:57:33,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214208 states, 193917 states have (on average 1.5628593676676104) internal successors, (303065), 183443 states have internal predecessors, (303065), 12686 states have call successors, (12686), 4948 states have call predecessors, (12686), 7604 states have return successors, (68104), 25817 states have call predecessors, (68104), 12686 states have call successors, (68104) [2021-11-25 17:57:35,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214208 states to 214208 states and 383855 transitions. [2021-11-25 17:57:35,319 INFO L78 Accepts]: Start accepts. Automaton has 214208 states and 383855 transitions. Word has length 70 [2021-11-25 17:57:35,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:35,320 INFO L470 AbstractCegarLoop]: Abstraction has 214208 states and 383855 transitions. [2021-11-25 17:57:35,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:57:35,321 INFO L276 IsEmpty]: Start isEmpty. Operand 214208 states and 383855 transitions. [2021-11-25 17:57:35,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 17:57:35,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:35,322 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:57:35,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 17:57:35,322 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:57:35,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:35,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1045896100, now seen corresponding path program 1 times [2021-11-25 17:57:35,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:35,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515879486] [2021-11-25 17:57:35,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:35,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:57:35,399 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:35,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515879486] [2021-11-25 17:57:35,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515879486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:35,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:57:35,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:57:35,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568574542] [2021-11-25 17:57:35,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:35,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:57:35,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:35,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:57:35,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:57:35,402 INFO L87 Difference]: Start difference. First operand 214208 states and 383855 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)