./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.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_2deda612-6394-4672-bbf4-5dee11975dba/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2deda612-6394-4672-bbf4-5dee11975dba/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_2deda612-6394-4672-bbf4-5dee11975dba/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2deda612-6394-4672-bbf4-5dee11975dba/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2deda612-6394-4672-bbf4-5dee11975dba/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_2deda612-6394-4672-bbf4-5dee11975dba/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 54dd2c42579f0de559de8ea2b74ae8f2f84f80b7530dd7d24e9994fd7ce14291 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:50:23,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:50:23,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:50:23,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:50:23,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:50:23,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:50:23,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:50:23,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:50:23,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:50:23,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:50:23,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:50:23,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:50:23,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:50:23,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:50:23,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:50:23,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:50:23,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:50:23,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:50:23,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:50:23,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:50:23,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:50:23,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:50:23,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:50:23,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:50:23,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:50:23,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:50:23,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:50:23,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:50:23,902 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:50:23,903 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:50:23,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:50:23,904 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:50:23,905 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:50:23,907 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:50:23,908 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:50:23,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:50:23,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:50:23,910 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:50:23,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:50:23,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:50:23,912 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:50:23,917 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2deda612-6394-4672-bbf4-5dee11975dba/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 17:50:23,959 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:50:23,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:50:23,959 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:50:23,960 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:50:23,960 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:50:23,961 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:50:23,961 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:50:23,961 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:50:23,961 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:50:23,962 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:50:23,962 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:50:23,962 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:50:23,962 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:50:23,963 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:50:23,963 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:50:23,965 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:50:23,966 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:50:23,966 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:50:23,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:50:23,967 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:50:23,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:50:23,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:50:23,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:50:23,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:50:23,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:50:23,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:50:23,971 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:50:23,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:50:23,972 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:50:23,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:50:23,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:50:23,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:50:23,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:50:23,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:50:23,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:50:23,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:50:23,977 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:50:23,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:50:23,977 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:50:23,977 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:50:23,978 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:50:23,978 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_2deda612-6394-4672-bbf4-5dee11975dba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2deda612-6394-4672-bbf4-5dee11975dba/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54dd2c42579f0de559de8ea2b74ae8f2f84f80b7530dd7d24e9994fd7ce14291 [2021-11-25 17:50:24,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:50:24,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:50:24,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:50:24,247 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:50:24,248 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:50:24,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2deda612-6394-4672-bbf4-5dee11975dba/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-25 17:50:24,315 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2deda612-6394-4672-bbf4-5dee11975dba/bin/utaipan-eEHZpOm5b7/data/0de711e85/d983fb9f1e8140308e8718d104a469ef/FLAG635866258 [2021-11-25 17:50:24,838 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:50:24,852 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2deda612-6394-4672-bbf4-5dee11975dba/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-25 17:50:24,862 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2deda612-6394-4672-bbf4-5dee11975dba/bin/utaipan-eEHZpOm5b7/data/0de711e85/d983fb9f1e8140308e8718d104a469ef/FLAG635866258 [2021-11-25 17:50:25,163 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2deda612-6394-4672-bbf4-5dee11975dba/bin/utaipan-eEHZpOm5b7/data/0de711e85/d983fb9f1e8140308e8718d104a469ef [2021-11-25 17:50:25,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:50:25,167 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:50:25,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:50:25,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:50:25,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:50:25,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:50:25" (1/1) ... [2021-11-25 17:50:25,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b8ef813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:25, skipping insertion in model container [2021-11-25 17:50:25,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:50:25" (1/1) ... [2021-11-25 17:50:25,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:50:25,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:50:25,515 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_2deda612-6394-4672-bbf4-5dee11975dba/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2021-11-25 17:50:25,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:50:25,587 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:50:25,634 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_2deda612-6394-4672-bbf4-5dee11975dba/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2021-11-25 17:50:25,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:50:25,735 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:50:25,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:25 WrapperNode [2021-11-25 17:50:25,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:50:25,737 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:50:25,738 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:50:25,738 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:50:25,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:25" (1/1) ... [2021-11-25 17:50:25,759 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:25" (1/1) ... [2021-11-25 17:50:25,809 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 675 [2021-11-25 17:50:25,809 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:50:25,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:50:25,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:50:25,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:50:25,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:25" (1/1) ... [2021-11-25 17:50:25,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:25" (1/1) ... [2021-11-25 17:50:25,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:25" (1/1) ... [2021-11-25 17:50:25,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:25" (1/1) ... [2021-11-25 17:50:25,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:25" (1/1) ... [2021-11-25 17:50:25,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:25" (1/1) ... [2021-11-25 17:50:25,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:25" (1/1) ... [2021-11-25 17:50:25,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:50:25,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:50:25,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:50:25,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:50:25,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:25" (1/1) ... [2021-11-25 17:50:25,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:50:25,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2deda612-6394-4672-bbf4-5dee11975dba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:25,915 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2deda612-6394-4672-bbf4-5dee11975dba/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:50:25,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2deda612-6394-4672-bbf4-5dee11975dba/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:50:25,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:50:25,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:50:25,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:50:25,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:50:26,057 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:50:26,058 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:50:26,722 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:50:26,933 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:50:26,933 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 17:50:26,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:50:26 BoogieIcfgContainer [2021-11-25 17:50:26,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:50:26,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:50:26,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:50:26,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:50:26,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:50:25" (1/3) ... [2021-11-25 17:50:26,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a21fb64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:50:26, skipping insertion in model container [2021-11-25 17:50:26,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:25" (2/3) ... [2021-11-25 17:50:26,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a21fb64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:50:26, skipping insertion in model container [2021-11-25 17:50:26,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:50:26" (3/3) ... [2021-11-25 17:50:26,948 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-25 17:50:26,956 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:50:26,956 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 17:50:27,000 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:50:27,007 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 17:50:27,007 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 17:50:27,025 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 132 states have (on average 1.7045454545454546) internal successors, (225), 133 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:27,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 17:50:27,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:27,033 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] [2021-11-25 17:50:27,034 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:27,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:27,039 INFO L85 PathProgramCache]: Analyzing trace with hash 700378674, now seen corresponding path program 1 times [2021-11-25 17:50:27,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:27,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476093218] [2021-11-25 17:50:27,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:27,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:27,587 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 17:50:27,589 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:27,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476093218] [2021-11-25 17:50:27,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476093218] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:27,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:27,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:50:27,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133258452] [2021-11-25 17:50:27,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:27,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:50:27,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:27,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:50:27,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:50:27,640 INFO L87 Difference]: Start difference. First operand has 134 states, 132 states have (on average 1.7045454545454546) internal successors, (225), 133 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:28,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:28,060 INFO L93 Difference]: Finished difference Result 406 states and 650 transitions. [2021-11-25 17:50:28,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:50:28,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-25 17:50:28,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:28,095 INFO L225 Difference]: With dead ends: 406 [2021-11-25 17:50:28,095 INFO L226 Difference]: Without dead ends: 324 [2021-11-25 17:50:28,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:50:28,102 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 809 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:28,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 644 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:50:28,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-25 17:50:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 318. [2021-11-25 17:50:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.384858044164038) internal successors, (439), 317 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:28,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 439 transitions. [2021-11-25 17:50:28,171 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 439 transitions. Word has length 54 [2021-11-25 17:50:28,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:28,172 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 439 transitions. [2021-11-25 17:50:28,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:28,172 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 439 transitions. [2021-11-25 17:50:28,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 17:50:28,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:28,175 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] [2021-11-25 17:50:28,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 17:50:28,176 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:28,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:28,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1332687756, now seen corresponding path program 1 times [2021-11-25 17:50:28,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:28,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998679376] [2021-11-25 17:50:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:28,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:28,328 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 17:50:28,329 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:28,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998679376] [2021-11-25 17:50:28,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998679376] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:28,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:28,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:50:28,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046273352] [2021-11-25 17:50:28,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:28,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:50:28,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:28,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:50:28,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:50:28,335 INFO L87 Difference]: Start difference. First operand 318 states and 439 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:28,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:28,639 INFO L93 Difference]: Finished difference Result 764 states and 1085 transitions. [2021-11-25 17:50:28,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:50:28,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-25 17:50:28,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:28,646 INFO L225 Difference]: With dead ends: 764 [2021-11-25 17:50:28,646 INFO L226 Difference]: Without dead ends: 496 [2021-11-25 17:50:28,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:50:28,657 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 466 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:28,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 188 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:50:28,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-25 17:50:28,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 494. [2021-11-25 17:50:28,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 1.4137931034482758) internal successors, (697), 493 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:28,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 697 transitions. [2021-11-25 17:50:28,740 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 697 transitions. Word has length 55 [2021-11-25 17:50:28,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:28,740 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 697 transitions. [2021-11-25 17:50:28,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:28,741 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 697 transitions. [2021-11-25 17:50:28,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 17:50:28,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:28,743 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] [2021-11-25 17:50:28,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 17:50:28,744 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:28,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:28,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1650750162, now seen corresponding path program 1 times [2021-11-25 17:50:28,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:28,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924453100] [2021-11-25 17:50:28,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:28,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:28,827 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 17:50:28,827 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:28,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924453100] [2021-11-25 17:50:28,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924453100] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:28,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:28,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:50:28,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601125130] [2021-11-25 17:50:28,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:28,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:50:28,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:28,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:50:28,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:50:28,830 INFO L87 Difference]: Start difference. First operand 494 states and 697 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:29,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:29,081 INFO L93 Difference]: Finished difference Result 1242 states and 1795 transitions. [2021-11-25 17:50:29,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:50:29,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-25 17:50:29,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:29,087 INFO L225 Difference]: With dead ends: 1242 [2021-11-25 17:50:29,087 INFO L226 Difference]: Without dead ends: 848 [2021-11-25 17:50:29,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:50:29,090 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 438 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:29,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 204 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:50:29,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-11-25 17:50:29,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 846. [2021-11-25 17:50:29,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 1.4355029585798817) internal successors, (1213), 845 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:29,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1213 transitions. [2021-11-25 17:50:29,188 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1213 transitions. Word has length 55 [2021-11-25 17:50:29,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:29,189 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 1213 transitions. [2021-11-25 17:50:29,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:29,190 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1213 transitions. [2021-11-25 17:50:29,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 17:50:29,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:29,192 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] [2021-11-25 17:50:29,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 17:50:29,192 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:29,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:29,193 INFO L85 PathProgramCache]: Analyzing trace with hash -930562429, now seen corresponding path program 1 times [2021-11-25 17:50:29,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:29,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372076289] [2021-11-25 17:50:29,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:29,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:29,277 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 17:50:29,277 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:29,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372076289] [2021-11-25 17:50:29,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372076289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:29,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:29,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:50:29,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477364493] [2021-11-25 17:50:29,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:29,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:50:29,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:29,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:50:29,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:50:29,280 INFO L87 Difference]: Start difference. First operand 846 states and 1213 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:29,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:29,612 INFO L93 Difference]: Finished difference Result 2325 states and 3384 transitions. [2021-11-25 17:50:29,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:50:29,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-25 17:50:29,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:29,622 INFO L225 Difference]: With dead ends: 2325 [2021-11-25 17:50:29,623 INFO L226 Difference]: Without dead ends: 1552 [2021-11-25 17:50:29,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:50:29,626 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 443 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:29,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 196 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:50:29,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2021-11-25 17:50:29,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1550. [2021-11-25 17:50:29,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 1.4441575209812783) internal successors, (2237), 1549 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:29,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 2237 transitions. [2021-11-25 17:50:29,774 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 2237 transitions. Word has length 55 [2021-11-25 17:50:29,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:29,775 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 2237 transitions. [2021-11-25 17:50:29,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:29,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 2237 transitions. [2021-11-25 17:50:29,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 17:50:29,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:29,776 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] [2021-11-25 17:50:29,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 17:50:29,777 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:29,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:29,777 INFO L85 PathProgramCache]: Analyzing trace with hash -275637083, now seen corresponding path program 1 times [2021-11-25 17:50:29,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:29,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328844509] [2021-11-25 17:50:29,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:29,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:29,839 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 17:50:29,839 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:29,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328844509] [2021-11-25 17:50:29,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328844509] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:29,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:29,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:50:29,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784984840] [2021-11-25 17:50:29,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:29,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:50:29,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:29,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:50:29,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:50:29,842 INFO L87 Difference]: Start difference. First operand 1550 states and 2237 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:30,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:30,251 INFO L93 Difference]: Finished difference Result 4172 states and 6061 transitions. [2021-11-25 17:50:30,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:50:30,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-25 17:50:30,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:30,268 INFO L225 Difference]: With dead ends: 4172 [2021-11-25 17:50:30,268 INFO L226 Difference]: Without dead ends: 2656 [2021-11-25 17:50:30,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:50:30,273 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 459 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:30,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 180 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:50:30,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-11-25 17:50:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2654. [2021-11-25 17:50:30,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 2653 states have (on average 1.4364869958537505) internal successors, (3811), 2653 states have internal predecessors, (3811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3811 transitions. [2021-11-25 17:50:30,539 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3811 transitions. Word has length 55 [2021-11-25 17:50:30,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:30,541 INFO L470 AbstractCegarLoop]: Abstraction has 2654 states and 3811 transitions. [2021-11-25 17:50:30,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:30,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3811 transitions. [2021-11-25 17:50:30,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 17:50:30,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:30,548 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] [2021-11-25 17:50:30,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 17:50:30,548 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:30,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:30,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1708398918, now seen corresponding path program 1 times [2021-11-25 17:50:30,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:30,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442780422] [2021-11-25 17:50:30,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:30,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:31,385 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 17:50:31,385 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:31,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442780422] [2021-11-25 17:50:31,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442780422] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:31,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:31,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-25 17:50:31,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474820636] [2021-11-25 17:50:31,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:31,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 17:50:31,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:31,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 17:50:31,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-11-25 17:50:31,388 INFO L87 Difference]: Start difference. First operand 2654 states and 3811 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:32,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:32,733 INFO L93 Difference]: Finished difference Result 6136 states and 8815 transitions. [2021-11-25 17:50:32,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 17:50:32,733 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-25 17:50:32,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:32,759 INFO L225 Difference]: With dead ends: 6136 [2021-11-25 17:50:32,759 INFO L226 Difference]: Without dead ends: 4582 [2021-11-25 17:50:32,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2021-11-25 17:50:32,764 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 769 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:32,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 1491 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 17:50:32,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2021-11-25 17:50:33,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 3700. [2021-11-25 17:50:33,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3700 states, 3699 states have (on average 1.4257907542579076) internal successors, (5274), 3699 states have internal predecessors, (5274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:33,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3700 states to 3700 states and 5274 transitions. [2021-11-25 17:50:33,161 INFO L78 Accepts]: Start accepts. Automaton has 3700 states and 5274 transitions. Word has length 56 [2021-11-25 17:50:33,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:33,161 INFO L470 AbstractCegarLoop]: Abstraction has 3700 states and 5274 transitions. [2021-11-25 17:50:33,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:33,162 INFO L276 IsEmpty]: Start isEmpty. Operand 3700 states and 5274 transitions. [2021-11-25 17:50:33,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 17:50:33,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:33,163 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] [2021-11-25 17:50:33,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 17:50:33,164 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:33,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:33,164 INFO L85 PathProgramCache]: Analyzing trace with hash -9242362, now seen corresponding path program 1 times [2021-11-25 17:50:33,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:33,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302365025] [2021-11-25 17:50:33,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:33,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:33,757 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 17:50:33,757 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:33,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302365025] [2021-11-25 17:50:33,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302365025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:33,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:33,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-25 17:50:33,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852448952] [2021-11-25 17:50:33,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:33,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 17:50:33,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:33,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 17:50:33,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-25 17:50:33,760 INFO L87 Difference]: Start difference. First operand 3700 states and 5274 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:35,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:35,077 INFO L93 Difference]: Finished difference Result 4385 states and 6224 transitions. [2021-11-25 17:50:35,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 17:50:35,078 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-25 17:50:35,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:35,104 INFO L225 Difference]: With dead ends: 4385 [2021-11-25 17:50:35,104 INFO L226 Difference]: Without dead ends: 4383 [2021-11-25 17:50:35,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-11-25 17:50:35,110 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 851 mSDsluCounter, 1691 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:35,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 1914 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 17:50:35,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4383 states. [2021-11-25 17:50:35,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4383 to 4120. [2021-11-25 17:50:35,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4120 states, 4119 states have (on average 1.4238892935178442) internal successors, (5865), 4119 states have internal predecessors, (5865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:35,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4120 states to 4120 states and 5865 transitions. [2021-11-25 17:50:35,546 INFO L78 Accepts]: Start accepts. Automaton has 4120 states and 5865 transitions. Word has length 56 [2021-11-25 17:50:35,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:35,547 INFO L470 AbstractCegarLoop]: Abstraction has 4120 states and 5865 transitions. [2021-11-25 17:50:35,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:35,547 INFO L276 IsEmpty]: Start isEmpty. Operand 4120 states and 5865 transitions. [2021-11-25 17:50:35,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 17:50:35,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:35,548 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] [2021-11-25 17:50:35,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 17:50:35,549 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:35,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:35,550 INFO L85 PathProgramCache]: Analyzing trace with hash 352118054, now seen corresponding path program 1 times [2021-11-25 17:50:35,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:35,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641849348] [2021-11-25 17:50:35,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:35,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:35,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:36,165 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 17:50:36,166 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:36,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641849348] [2021-11-25 17:50:36,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641849348] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:36,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:36,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-25 17:50:36,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480794124] [2021-11-25 17:50:36,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:36,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 17:50:36,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:36,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 17:50:36,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-25 17:50:36,168 INFO L87 Difference]: Start difference. First operand 4120 states and 5865 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:37,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:37,241 INFO L93 Difference]: Finished difference Result 6210 states and 8839 transitions. [2021-11-25 17:50:37,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 17:50:37,242 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-25 17:50:37,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:37,274 INFO L225 Difference]: With dead ends: 6210 [2021-11-25 17:50:37,274 INFO L226 Difference]: Without dead ends: 5392 [2021-11-25 17:50:37,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-11-25 17:50:37,278 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 757 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 1620 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:37,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 1620 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 17:50:37,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5392 states. [2021-11-25 17:50:37,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5392 to 4856. [2021-11-25 17:50:37,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4856 states, 4855 states have (on average 1.4218331616889803) internal successors, (6903), 4855 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:37,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 6903 transitions. [2021-11-25 17:50:37,776 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 6903 transitions. Word has length 56 [2021-11-25 17:50:37,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:37,778 INFO L470 AbstractCegarLoop]: Abstraction has 4856 states and 6903 transitions. [2021-11-25 17:50:37,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:37,778 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 6903 transitions. [2021-11-25 17:50:37,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 17:50:37,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:37,779 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] [2021-11-25 17:50:37,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 17:50:37,780 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:37,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:37,780 INFO L85 PathProgramCache]: Analyzing trace with hash 573085030, now seen corresponding path program 1 times [2021-11-25 17:50:37,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:37,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493627978] [2021-11-25 17:50:37,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:37,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:38,329 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 17:50:38,330 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:38,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493627978] [2021-11-25 17:50:38,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493627978] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:38,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:38,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-25 17:50:38,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621260814] [2021-11-25 17:50:38,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:38,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 17:50:38,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:38,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 17:50:38,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-25 17:50:38,331 INFO L87 Difference]: Start difference. First operand 4856 states and 6903 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:39,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:39,693 INFO L93 Difference]: Finished difference Result 8753 states and 12508 transitions. [2021-11-25 17:50:39,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 17:50:39,693 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-25 17:50:39,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:39,739 INFO L225 Difference]: With dead ends: 8753 [2021-11-25 17:50:39,739 INFO L226 Difference]: Without dead ends: 8751 [2021-11-25 17:50:39,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2021-11-25 17:50:39,751 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 711 mSDsluCounter, 1800 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 2050 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:39,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 2050 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 17:50:39,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8751 states. [2021-11-25 17:50:40,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8751 to 6985. [2021-11-25 17:50:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6985 states, 6984 states have (on average 1.424971363115693) internal successors, (9952), 6984 states have internal predecessors, (9952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:40,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6985 states to 6985 states and 9952 transitions. [2021-11-25 17:50:40,546 INFO L78 Accepts]: Start accepts. Automaton has 6985 states and 9952 transitions. Word has length 56 [2021-11-25 17:50:40,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:40,546 INFO L470 AbstractCegarLoop]: Abstraction has 6985 states and 9952 transitions. [2021-11-25 17:50:40,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:40,546 INFO L276 IsEmpty]: Start isEmpty. Operand 6985 states and 9952 transitions. [2021-11-25 17:50:40,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 17:50:40,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:40,548 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] [2021-11-25 17:50:40,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 17:50:40,548 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:40,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:40,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1964396774, now seen corresponding path program 1 times [2021-11-25 17:50:40,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:40,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071425037] [2021-11-25 17:50:40,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:40,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:41,472 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 17:50:41,472 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:41,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071425037] [2021-11-25 17:50:41,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071425037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:41,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:41,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-25 17:50:41,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453697298] [2021-11-25 17:50:41,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:41,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-25 17:50:41,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:41,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-25 17:50:41,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-25 17:50:41,475 INFO L87 Difference]: Start difference. First operand 6985 states and 9952 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:43,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:43,918 INFO L93 Difference]: Finished difference Result 10918 states and 15530 transitions. [2021-11-25 17:50:43,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 17:50:43,919 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-25 17:50:43,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:43,945 INFO L225 Difference]: With dead ends: 10918 [2021-11-25 17:50:43,945 INFO L226 Difference]: Without dead ends: 10916 [2021-11-25 17:50:43,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=405, Invalid=1235, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 17:50:43,951 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 992 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 1599 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 1639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:43,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [992 Valid, 1245 Invalid, 1639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1599 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 17:50:43,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10916 states. [2021-11-25 17:50:44,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10916 to 7007. [2021-11-25 17:50:44,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7007 states, 7006 states have (on average 1.4240650870682272) internal successors, (9977), 7006 states have internal predecessors, (9977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:44,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7007 states to 7007 states and 9977 transitions. [2021-11-25 17:50:44,693 INFO L78 Accepts]: Start accepts. Automaton has 7007 states and 9977 transitions. Word has length 58 [2021-11-25 17:50:44,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:44,693 INFO L470 AbstractCegarLoop]: Abstraction has 7007 states and 9977 transitions. [2021-11-25 17:50:44,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:44,694 INFO L276 IsEmpty]: Start isEmpty. Operand 7007 states and 9977 transitions. [2021-11-25 17:50:44,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 17:50:44,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:44,695 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] [2021-11-25 17:50:44,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 17:50:44,695 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:44,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:44,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1603036358, now seen corresponding path program 1 times [2021-11-25 17:50:44,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:44,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951502076] [2021-11-25 17:50:44,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:44,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:45,269 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 17:50:45,270 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:45,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951502076] [2021-11-25 17:50:45,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951502076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:45,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:45,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-25 17:50:45,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638100470] [2021-11-25 17:50:45,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:45,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 17:50:45,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:45,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 17:50:45,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-11-25 17:50:45,272 INFO L87 Difference]: Start difference. First operand 7007 states and 9977 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:46,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:46,372 INFO L93 Difference]: Finished difference Result 9107 states and 12961 transitions. [2021-11-25 17:50:46,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 17:50:46,373 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-25 17:50:46,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:46,391 INFO L225 Difference]: With dead ends: 9107 [2021-11-25 17:50:46,391 INFO L226 Difference]: Without dead ends: 8289 [2021-11-25 17:50:46,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2021-11-25 17:50:46,396 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 754 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:46,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 1643 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 17:50:46,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8289 states. [2021-11-25 17:50:46,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8289 to 7004. [2021-11-25 17:50:47,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7004 states, 7003 states have (on average 1.4241039554476653) internal successors, (9973), 7003 states have internal predecessors, (9973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7004 states to 7004 states and 9973 transitions. [2021-11-25 17:50:47,041 INFO L78 Accepts]: Start accepts. Automaton has 7004 states and 9973 transitions. Word has length 58 [2021-11-25 17:50:47,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:47,041 INFO L470 AbstractCegarLoop]: Abstraction has 7004 states and 9973 transitions. [2021-11-25 17:50:47,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:47,042 INFO L276 IsEmpty]: Start isEmpty. Operand 7004 states and 9973 transitions. [2021-11-25 17:50:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 17:50:47,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:47,044 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] [2021-11-25 17:50:47,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 17:50:47,044 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:47,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:47,045 INFO L85 PathProgramCache]: Analyzing trace with hash 319750906, now seen corresponding path program 1 times [2021-11-25 17:50:47,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:47,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199790277] [2021-11-25 17:50:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:47,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:47,637 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 17:50:47,638 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:47,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199790277] [2021-11-25 17:50:47,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199790277] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:47,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:47,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-25 17:50:47,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399690623] [2021-11-25 17:50:47,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:47,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 17:50:47,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:47,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 17:50:47,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-11-25 17:50:47,639 INFO L87 Difference]: Start difference. First operand 7004 states and 9973 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:48,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:48,844 INFO L93 Difference]: Finished difference Result 8071 states and 11468 transitions. [2021-11-25 17:50:48,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 17:50:48,845 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-25 17:50:48,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:48,863 INFO L225 Difference]: With dead ends: 8071 [2021-11-25 17:50:48,863 INFO L226 Difference]: Without dead ends: 8069 [2021-11-25 17:50:48,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2021-11-25 17:50:48,867 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 594 mSDsluCounter, 1664 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:48,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [594 Valid, 1888 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:50:48,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8069 states. [2021-11-25 17:50:49,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8069 to 7017. [2021-11-25 17:50:49,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7017 states, 7016 states have (on average 1.423745724059293) internal successors, (9989), 7016 states have internal predecessors, (9989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:49,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7017 states to 7017 states and 9989 transitions. [2021-11-25 17:50:49,478 INFO L78 Accepts]: Start accepts. Automaton has 7017 states and 9989 transitions. Word has length 58 [2021-11-25 17:50:49,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:49,478 INFO L470 AbstractCegarLoop]: Abstraction has 7017 states and 9989 transitions. [2021-11-25 17:50:49,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:49,479 INFO L276 IsEmpty]: Start isEmpty. Operand 7017 states and 9989 transitions. [2021-11-25 17:50:49,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 17:50:49,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:49,480 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] [2021-11-25 17:50:49,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 17:50:49,480 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:49,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:49,481 INFO L85 PathProgramCache]: Analyzing trace with hash -361708678, now seen corresponding path program 1 times [2021-11-25 17:50:49,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:49,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894362754] [2021-11-25 17:50:49,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:49,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:50,114 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 17:50:50,114 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:50,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894362754] [2021-11-25 17:50:50,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894362754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:50,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:50,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-25 17:50:50,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111577589] [2021-11-25 17:50:50,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:50,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 17:50:50,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:50,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 17:50:50,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-11-25 17:50:50,116 INFO L87 Difference]: Start difference. First operand 7017 states and 9989 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:51,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:51,496 INFO L93 Difference]: Finished difference Result 10483 states and 14971 transitions. [2021-11-25 17:50:51,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-25 17:50:51,496 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-25 17:50:51,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:51,514 INFO L225 Difference]: With dead ends: 10483 [2021-11-25 17:50:51,514 INFO L226 Difference]: Without dead ends: 8929 [2021-11-25 17:50:51,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2021-11-25 17:50:51,520 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 611 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:51,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 999 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:50:51,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8929 states. [2021-11-25 17:50:52,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8929 to 7010. [2021-11-25 17:50:52,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7010 states, 7009 states have (on average 1.4238835782565273) internal successors, (9980), 7009 states have internal predecessors, (9980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:52,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7010 states to 7010 states and 9980 transitions. [2021-11-25 17:50:52,236 INFO L78 Accepts]: Start accepts. Automaton has 7010 states and 9980 transitions. Word has length 58 [2021-11-25 17:50:52,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:52,237 INFO L470 AbstractCegarLoop]: Abstraction has 7010 states and 9980 transitions. [2021-11-25 17:50:52,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:52,237 INFO L276 IsEmpty]: Start isEmpty. Operand 7010 states and 9980 transitions. [2021-11-25 17:50:52,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 17:50:52,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:52,238 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] [2021-11-25 17:50:52,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 17:50:52,239 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:52,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:52,239 INFO L85 PathProgramCache]: Analyzing trace with hash -2079349958, now seen corresponding path program 1 times [2021-11-25 17:50:52,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:52,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530295683] [2021-11-25 17:50:52,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:52,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:52,769 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 17:50:52,769 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:52,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530295683] [2021-11-25 17:50:52,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530295683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:52,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:52,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-25 17:50:52,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533214317] [2021-11-25 17:50:52,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:52,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 17:50:52,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:52,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 17:50:52,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-11-25 17:50:52,772 INFO L87 Difference]: Start difference. First operand 7010 states and 9980 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:54,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:54,812 INFO L93 Difference]: Finished difference Result 12840 states and 18318 transitions. [2021-11-25 17:50:54,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-25 17:50:54,812 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-25 17:50:54,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:54,832 INFO L225 Difference]: With dead ends: 12840 [2021-11-25 17:50:54,833 INFO L226 Difference]: Without dead ends: 12838 [2021-11-25 17:50:54,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2021-11-25 17:50:54,837 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 882 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:54,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [882 Valid, 1608 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 17:50:54,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12838 states. [2021-11-25 17:50:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12838 to 7016. [2021-11-25 17:50:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7016 states, 7015 states have (on average 1.4236635780470421) internal successors, (9987), 7015 states have internal predecessors, (9987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:55,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7016 states to 7016 states and 9987 transitions. [2021-11-25 17:50:55,555 INFO L78 Accepts]: Start accepts. Automaton has 7016 states and 9987 transitions. Word has length 58 [2021-11-25 17:50:55,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:55,556 INFO L470 AbstractCegarLoop]: Abstraction has 7016 states and 9987 transitions. [2021-11-25 17:50:55,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:55,556 INFO L276 IsEmpty]: Start isEmpty. Operand 7016 states and 9987 transitions. [2021-11-25 17:50:55,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 17:50:55,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:55,557 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] [2021-11-25 17:50:55,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 17:50:55,558 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:55,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:55,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1717989542, now seen corresponding path program 1 times [2021-11-25 17:50:55,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:55,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954720615] [2021-11-25 17:50:55,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:55,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:56,136 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 17:50:56,136 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:56,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954720615] [2021-11-25 17:50:56,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954720615] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:56,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:56,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-25 17:50:56,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298635388] [2021-11-25 17:50:56,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:56,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 17:50:56,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:56,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 17:50:56,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-25 17:50:56,139 INFO L87 Difference]: Start difference. First operand 7016 states and 9987 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:57,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:57,655 INFO L93 Difference]: Finished difference Result 14630 states and 20889 transitions. [2021-11-25 17:50:57,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 17:50:57,655 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-25 17:50:57,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:57,668 INFO L225 Difference]: With dead ends: 14630 [2021-11-25 17:50:57,668 INFO L226 Difference]: Without dead ends: 12996 [2021-11-25 17:50:57,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2021-11-25 17:50:57,673 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 560 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:57,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 1603 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:50:57,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12996 states. [2021-11-25 17:50:58,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12996 to 8373. [2021-11-25 17:50:58,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8373 states, 8372 states have (on average 1.4220019111323459) internal successors, (11905), 8372 states have internal predecessors, (11905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:58,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8373 states to 8373 states and 11905 transitions. [2021-11-25 17:50:58,354 INFO L78 Accepts]: Start accepts. Automaton has 8373 states and 11905 transitions. Word has length 58 [2021-11-25 17:50:58,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:58,354 INFO L470 AbstractCegarLoop]: Abstraction has 8373 states and 11905 transitions. [2021-11-25 17:50:58,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:58,355 INFO L276 IsEmpty]: Start isEmpty. Operand 8373 states and 11905 transitions. [2021-11-25 17:50:58,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-25 17:50:58,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:58,356 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] [2021-11-25 17:50:58,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 17:50:58,357 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:58,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:58,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1222037503, now seen corresponding path program 1 times [2021-11-25 17:50:58,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:58,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377700541] [2021-11-25 17:50:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:58,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:58,396 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 17:50:58,397 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:58,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377700541] [2021-11-25 17:50:58,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377700541] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:58,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:58,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:50:58,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538033672] [2021-11-25 17:50:58,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:58,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:50:58,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:58,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:50:58,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:50:58,399 INFO L87 Difference]: Start difference. First operand 8373 states and 11905 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:58,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:58,999 INFO L93 Difference]: Finished difference Result 14335 states and 20437 transitions. [2021-11-25 17:50:58,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:50:58,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-25 17:50:58,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:59,005 INFO L225 Difference]: With dead ends: 14335 [2021-11-25 17:50:59,005 INFO L226 Difference]: Without dead ends: 6165 [2021-11-25 17:50:59,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:50:59,015 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 110 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:59,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 303 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:50:59,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6165 states. [2021-11-25 17:50:59,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6165 to 6025. [2021-11-25 17:50:59,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6025 states, 6024 states have (on average 1.4173306772908367) internal successors, (8538), 6024 states have internal predecessors, (8538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:59,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6025 states to 6025 states and 8538 transitions. [2021-11-25 17:50:59,510 INFO L78 Accepts]: Start accepts. Automaton has 6025 states and 8538 transitions. Word has length 59 [2021-11-25 17:50:59,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:59,510 INFO L470 AbstractCegarLoop]: Abstraction has 6025 states and 8538 transitions. [2021-11-25 17:50:59,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:59,510 INFO L276 IsEmpty]: Start isEmpty. Operand 6025 states and 8538 transitions. [2021-11-25 17:50:59,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-25 17:50:59,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:59,512 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] [2021-11-25 17:50:59,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 17:50:59,512 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:59,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:59,513 INFO L85 PathProgramCache]: Analyzing trace with hash -678250043, now seen corresponding path program 1 times [2021-11-25 17:50:59,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:59,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758128452] [2021-11-25 17:50:59,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:59,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:59,545 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 17:50:59,546 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:59,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758128452] [2021-11-25 17:50:59,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758128452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:59,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:59,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:50:59,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792750458] [2021-11-25 17:50:59,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:59,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:50:59,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:59,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:50:59,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:50:59,548 INFO L87 Difference]: Start difference. First operand 6025 states and 8538 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:00,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:00,048 INFO L93 Difference]: Finished difference Result 10394 states and 14791 transitions. [2021-11-25 17:51:00,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:51:00,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-25 17:51:00,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:00,053 INFO L225 Difference]: With dead ends: 10394 [2021-11-25 17:51:00,053 INFO L226 Difference]: Without dead ends: 5802 [2021-11-25 17:51:00,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:51:00,058 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 112 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:00,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 291 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:51:00,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5802 states. [2021-11-25 17:51:00,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5802 to 5800. [2021-11-25 17:51:00,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5800 states, 5799 states have (on average 1.4155888946370063) internal successors, (8209), 5799 states have internal predecessors, (8209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:00,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5800 states to 5800 states and 8209 transitions. [2021-11-25 17:51:00,491 INFO L78 Accepts]: Start accepts. Automaton has 5800 states and 8209 transitions. Word has length 59 [2021-11-25 17:51:00,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:00,492 INFO L470 AbstractCegarLoop]: Abstraction has 5800 states and 8209 transitions. [2021-11-25 17:51:00,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:00,492 INFO L276 IsEmpty]: Start isEmpty. Operand 5800 states and 8209 transitions. [2021-11-25 17:51:00,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 17:51:00,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:00,493 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] [2021-11-25 17:51:00,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 17:51:00,493 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:00,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:00,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1682930674, now seen corresponding path program 1 times [2021-11-25 17:51:00,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:00,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479683299] [2021-11-25 17:51:00,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:00,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:02,323 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 17:51:02,324 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:02,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479683299] [2021-11-25 17:51:02,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479683299] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:02,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:02,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-25 17:51:02,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220498942] [2021-11-25 17:51:02,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:02,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 17:51:02,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:02,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 17:51:02,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-11-25 17:51:02,328 INFO L87 Difference]: Start difference. First operand 5800 states and 8209 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:06,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:06,880 INFO L93 Difference]: Finished difference Result 6460 states and 9115 transitions. [2021-11-25 17:51:06,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-25 17:51:06,880 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-25 17:51:06,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:06,887 INFO L225 Difference]: With dead ends: 6460 [2021-11-25 17:51:06,887 INFO L226 Difference]: Without dead ends: 6458 [2021-11-25 17:51:06,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=619, Invalid=1931, Unknown=0, NotChecked=0, Total=2550 [2021-11-25 17:51:06,890 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 1136 mSDsluCounter, 2032 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1136 SdHoareTripleChecker+Valid, 2252 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:06,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1136 Valid, 2252 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 17:51:06,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6458 states. [2021-11-25 17:51:07,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6458 to 5800. [2021-11-25 17:51:07,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5800 states, 5799 states have (on average 1.4155888946370063) internal successors, (8209), 5799 states have internal predecessors, (8209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:07,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5800 states to 5800 states and 8209 transitions. [2021-11-25 17:51:07,325 INFO L78 Accepts]: Start accepts. Automaton has 5800 states and 8209 transitions. Word has length 60 [2021-11-25 17:51:07,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:07,325 INFO L470 AbstractCegarLoop]: Abstraction has 5800 states and 8209 transitions. [2021-11-25 17:51:07,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:07,325 INFO L276 IsEmpty]: Start isEmpty. Operand 5800 states and 8209 transitions. [2021-11-25 17:51:07,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 17:51:07,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:07,326 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] [2021-11-25 17:51:07,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 17:51:07,327 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:07,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:07,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1527028814, now seen corresponding path program 1 times [2021-11-25 17:51:07,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:07,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630029606] [2021-11-25 17:51:07,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:07,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:08,857 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 17:51:08,857 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:08,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630029606] [2021-11-25 17:51:08,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630029606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:08,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:08,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-25 17:51:08,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180618677] [2021-11-25 17:51:08,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:08,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 17:51:08,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:08,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 17:51:08,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-11-25 17:51:08,859 INFO L87 Difference]: Start difference. First operand 5800 states and 8209 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:13,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:13,123 INFO L93 Difference]: Finished difference Result 7573 states and 10637 transitions. [2021-11-25 17:51:13,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-25 17:51:13,124 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-25 17:51:13,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:13,136 INFO L225 Difference]: With dead ends: 7573 [2021-11-25 17:51:13,136 INFO L226 Difference]: Without dead ends: 7571 [2021-11-25 17:51:13,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=520, Invalid=1460, Unknown=0, NotChecked=0, Total=1980 [2021-11-25 17:51:13,140 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 825 mSDsluCounter, 2122 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 2368 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:13,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 2368 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1350 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 17:51:13,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7571 states. [2021-11-25 17:51:13,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7571 to 5806. [2021-11-25 17:51:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5806 states, 5805 states have (on average 1.4153316106804479) internal successors, (8216), 5805 states have internal predecessors, (8216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:13,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5806 states to 5806 states and 8216 transitions. [2021-11-25 17:51:13,595 INFO L78 Accepts]: Start accepts. Automaton has 5806 states and 8216 transitions. Word has length 60 [2021-11-25 17:51:13,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:13,595 INFO L470 AbstractCegarLoop]: Abstraction has 5806 states and 8216 transitions. [2021-11-25 17:51:13,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:13,596 INFO L276 IsEmpty]: Start isEmpty. Operand 5806 states and 8216 transitions. [2021-11-25 17:51:13,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 17:51:13,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:13,597 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] [2021-11-25 17:51:13,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 17:51:13,597 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:13,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:13,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1888389230, now seen corresponding path program 1 times [2021-11-25 17:51:13,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:13,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711718955] [2021-11-25 17:51:13,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:13,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:16,000 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 17:51:16,000 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:16,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711718955] [2021-11-25 17:51:16,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711718955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:16,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:16,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-11-25 17:51:16,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731694113] [2021-11-25 17:51:16,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:16,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-25 17:51:16,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:16,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-25 17:51:16,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-11-25 17:51:16,002 INFO L87 Difference]: Start difference. First operand 5806 states and 8216 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:20,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:20,704 INFO L93 Difference]: Finished difference Result 7896 states and 11161 transitions. [2021-11-25 17:51:20,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-25 17:51:20,705 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-25 17:51:20,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:20,716 INFO L225 Difference]: With dead ends: 7896 [2021-11-25 17:51:20,716 INFO L226 Difference]: Without dead ends: 7894 [2021-11-25 17:51:20,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=472, Invalid=1690, Unknown=0, NotChecked=0, Total=2162 [2021-11-25 17:51:20,721 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 746 mSDsluCounter, 1704 mSDsCounter, 0 mSdLazyCounter, 2611 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 1963 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:20,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 1963 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2611 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-25 17:51:20,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7894 states. [2021-11-25 17:51:21,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7894 to 6526. [2021-11-25 17:51:21,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6526 states, 6525 states have (on average 1.4154789272030652) internal successors, (9236), 6525 states have internal predecessors, (9236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:21,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6526 states to 6526 states and 9236 transitions. [2021-11-25 17:51:21,304 INFO L78 Accepts]: Start accepts. Automaton has 6526 states and 9236 transitions. Word has length 60 [2021-11-25 17:51:21,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:21,304 INFO L470 AbstractCegarLoop]: Abstraction has 6526 states and 9236 transitions. [2021-11-25 17:51:21,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:21,304 INFO L276 IsEmpty]: Start isEmpty. Operand 6526 states and 9236 transitions. [2021-11-25 17:51:21,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 17:51:21,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:21,310 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] [2021-11-25 17:51:21,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-25 17:51:21,311 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:21,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:21,311 INFO L85 PathProgramCache]: Analyzing trace with hash -483790802, now seen corresponding path program 1 times [2021-11-25 17:51:21,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:21,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435933595] [2021-11-25 17:51:21,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:21,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:22,740 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 17:51:22,741 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:22,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435933595] [2021-11-25 17:51:22,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435933595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:22,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:22,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-25 17:51:22,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620397815] [2021-11-25 17:51:22,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:22,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 17:51:22,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:22,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 17:51:22,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-11-25 17:51:22,742 INFO L87 Difference]: Start difference. First operand 6526 states and 9236 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:25,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:25,712 INFO L93 Difference]: Finished difference Result 7555 states and 10671 transitions. [2021-11-25 17:51:25,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-25 17:51:25,713 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-25 17:51:25,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:25,723 INFO L225 Difference]: With dead ends: 7555 [2021-11-25 17:51:25,723 INFO L226 Difference]: Without dead ends: 7553 [2021-11-25 17:51:25,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=548, Invalid=1708, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 17:51:25,726 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 1045 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 1668 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:25,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1045 Valid, 1668 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 17:51:25,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7553 states. [2021-11-25 17:51:26,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7553 to 6523. [2021-11-25 17:51:26,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6523 states, 6522 states have (on average 1.4155167126648267) internal successors, (9232), 6522 states have internal predecessors, (9232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6523 states to 6523 states and 9232 transitions. [2021-11-25 17:51:26,284 INFO L78 Accepts]: Start accepts. Automaton has 6523 states and 9232 transitions. Word has length 60 [2021-11-25 17:51:26,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:26,284 INFO L470 AbstractCegarLoop]: Abstraction has 6523 states and 9232 transitions. [2021-11-25 17:51:26,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:26,285 INFO L276 IsEmpty]: Start isEmpty. Operand 6523 states and 9232 transitions. [2021-11-25 17:51:26,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 17:51:26,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:26,285 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] [2021-11-25 17:51:26,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-25 17:51:26,286 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:26,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:26,286 INFO L85 PathProgramCache]: Analyzing trace with hash 2061659030, now seen corresponding path program 1 times [2021-11-25 17:51:26,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:26,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781499982] [2021-11-25 17:51:26,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:26,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:26,318 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 17:51:26,318 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:26,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781499982] [2021-11-25 17:51:26,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781499982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:26,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:26,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:51:26,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382180233] [2021-11-25 17:51:26,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:26,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:51:26,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:26,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:51:26,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:51:26,321 INFO L87 Difference]: Start difference. First operand 6523 states and 9232 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:26,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:26,914 INFO L93 Difference]: Finished difference Result 12176 states and 17293 transitions. [2021-11-25 17:51:26,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:51:26,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-25 17:51:26,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:26,923 INFO L225 Difference]: With dead ends: 12176 [2021-11-25 17:51:26,923 INFO L226 Difference]: Without dead ends: 6302 [2021-11-25 17:51:26,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:51:26,929 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 105 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:26,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 291 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:51:26,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6302 states. [2021-11-25 17:51:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6302 to 6299. [2021-11-25 17:51:27,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6299 states, 6298 states have (on average 1.4129882502381708) internal successors, (8899), 6298 states have internal predecessors, (8899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:27,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6299 states to 6299 states and 8899 transitions. [2021-11-25 17:51:27,481 INFO L78 Accepts]: Start accepts. Automaton has 6299 states and 8899 transitions. Word has length 61 [2021-11-25 17:51:27,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:27,482 INFO L470 AbstractCegarLoop]: Abstraction has 6299 states and 8899 transitions. [2021-11-25 17:51:27,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:27,482 INFO L276 IsEmpty]: Start isEmpty. Operand 6299 states and 8899 transitions. [2021-11-25 17:51:27,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 17:51:27,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:27,483 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] [2021-11-25 17:51:27,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-25 17:51:27,483 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:27,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:27,484 INFO L85 PathProgramCache]: Analyzing trace with hash -393337148, now seen corresponding path program 1 times [2021-11-25 17:51:27,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:27,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889146196] [2021-11-25 17:51:27,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:27,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:27,510 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 17:51:27,510 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:27,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889146196] [2021-11-25 17:51:27,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889146196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:27,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:27,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:51:27,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392508272] [2021-11-25 17:51:27,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:27,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:51:27,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:27,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:51:27,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:51:27,512 INFO L87 Difference]: Start difference. First operand 6299 states and 8899 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:28,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:28,245 INFO L93 Difference]: Finished difference Result 11235 states and 15916 transitions. [2021-11-25 17:51:28,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:51:28,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-25 17:51:28,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:28,252 INFO L225 Difference]: With dead ends: 11235 [2021-11-25 17:51:28,252 INFO L226 Difference]: Without dead ends: 6003 [2021-11-25 17:51:28,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:51:28,258 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 109 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:28,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 279 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:51:28,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6003 states. [2021-11-25 17:51:28,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6003 to 6001. [2021-11-25 17:51:28,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6001 states, 6000 states have (on average 1.4098333333333333) internal successors, (8459), 6000 states have internal predecessors, (8459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:28,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6001 states to 6001 states and 8459 transitions. [2021-11-25 17:51:28,819 INFO L78 Accepts]: Start accepts. Automaton has 6001 states and 8459 transitions. Word has length 61 [2021-11-25 17:51:28,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:28,819 INFO L470 AbstractCegarLoop]: Abstraction has 6001 states and 8459 transitions. [2021-11-25 17:51:28,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:28,819 INFO L276 IsEmpty]: Start isEmpty. Operand 6001 states and 8459 transitions. [2021-11-25 17:51:28,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 17:51:28,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:28,824 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] [2021-11-25 17:51:28,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-25 17:51:28,825 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:28,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:28,825 INFO L85 PathProgramCache]: Analyzing trace with hash -792398782, now seen corresponding path program 1 times [2021-11-25 17:51:28,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:28,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184210351] [2021-11-25 17:51:28,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:28,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:33,523 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 17:51:33,523 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:33,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184210351] [2021-11-25 17:51:33,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184210351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:33,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:33,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-11-25 17:51:33,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183038462] [2021-11-25 17:51:33,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:33,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-25 17:51:33,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:33,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-25 17:51:33,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 17:51:33,526 INFO L87 Difference]: Start difference. First operand 6001 states and 8459 transitions. Second operand has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:40,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:40,930 INFO L93 Difference]: Finished difference Result 6575 states and 9257 transitions. [2021-11-25 17:51:40,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-25 17:51:40,930 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-25 17:51:40,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:40,937 INFO L225 Difference]: With dead ends: 6575 [2021-11-25 17:51:40,937 INFO L226 Difference]: Without dead ends: 6573 [2021-11-25 17:51:40,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=893, Invalid=2889, Unknown=0, NotChecked=0, Total=3782 [2021-11-25 17:51:40,940 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 823 mSDsluCounter, 2602 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 2845 SdHoareTripleChecker+Invalid, 1806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:40,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 2845 Invalid, 1806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-25 17:51:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6573 states. [2021-11-25 17:51:41,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6573 to 5989. [2021-11-25 17:51:41,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5989 states, 5988 states have (on average 1.4106546426185704) internal successors, (8447), 5988 states have internal predecessors, (8447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:41,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5989 states to 5989 states and 8447 transitions. [2021-11-25 17:51:41,445 INFO L78 Accepts]: Start accepts. Automaton has 5989 states and 8447 transitions. Word has length 62 [2021-11-25 17:51:41,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:41,445 INFO L470 AbstractCegarLoop]: Abstraction has 5989 states and 8447 transitions. [2021-11-25 17:51:41,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:41,445 INFO L276 IsEmpty]: Start isEmpty. Operand 5989 states and 8447 transitions. [2021-11-25 17:51:41,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-25 17:51:41,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:41,446 INFO L514 BasicCegarLoop]: 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] [2021-11-25 17:51:41,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-25 17:51:41,446 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:41,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:41,447 INFO L85 PathProgramCache]: Analyzing trace with hash 482845675, now seen corresponding path program 1 times [2021-11-25 17:51:41,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:41,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233577721] [2021-11-25 17:51:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:41,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:41,496 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:41,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233577721] [2021-11-25 17:51:41,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233577721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:41,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:41,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:51:41,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920428971] [2021-11-25 17:51:41,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:41,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:51:41,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:41,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:51:41,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:51:41,499 INFO L87 Difference]: Start difference. First operand 5989 states and 8447 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:42,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:42,258 INFO L93 Difference]: Finished difference Result 9538 states and 13597 transitions. [2021-11-25 17:51:42,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:51:42,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-25 17:51:42,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:42,266 INFO L225 Difference]: With dead ends: 9538 [2021-11-25 17:51:42,266 INFO L226 Difference]: Without dead ends: 7360 [2021-11-25 17:51:42,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:51:42,271 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 80 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:42,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 338 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:51:42,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7360 states. [2021-11-25 17:51:42,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7360 to 6961. [2021-11-25 17:51:42,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6961 states, 6960 states have (on average 1.4102011494252873) internal successors, (9815), 6960 states have internal predecessors, (9815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:42,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6961 states to 6961 states and 9815 transitions. [2021-11-25 17:51:42,834 INFO L78 Accepts]: Start accepts. Automaton has 6961 states and 9815 transitions. Word has length 67 [2021-11-25 17:51:42,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:42,835 INFO L470 AbstractCegarLoop]: Abstraction has 6961 states and 9815 transitions. [2021-11-25 17:51:42,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:42,835 INFO L276 IsEmpty]: Start isEmpty. Operand 6961 states and 9815 transitions. [2021-11-25 17:51:42,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 17:51:42,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:42,836 INFO L514 BasicCegarLoop]: 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] [2021-11-25 17:51:42,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-25 17:51:42,836 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:42,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:42,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1460301266, now seen corresponding path program 1 times [2021-11-25 17:51:42,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:42,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777634743] [2021-11-25 17:51:42,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:42,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:42,899 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:42,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777634743] [2021-11-25 17:51:42,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777634743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:42,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:42,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:51:42,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636267461] [2021-11-25 17:51:42,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:42,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:51:42,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:42,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:51:42,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:51:42,901 INFO L87 Difference]: Start difference. First operand 6961 states and 9815 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:43,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:43,844 INFO L93 Difference]: Finished difference Result 11954 states and 17023 transitions. [2021-11-25 17:51:43,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:51:43,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-25 17:51:43,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:43,853 INFO L225 Difference]: With dead ends: 11954 [2021-11-25 17:51:43,854 INFO L226 Difference]: Without dead ends: 8824 [2021-11-25 17:51:43,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:51:43,858 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 75 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:43,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 319 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:51:43,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8824 states. [2021-11-25 17:51:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8824 to 8280. [2021-11-25 17:51:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8280 states, 8279 states have (on average 1.4081410798405605) internal successors, (11658), 8279 states have internal predecessors, (11658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:44,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8280 states to 8280 states and 11658 transitions. [2021-11-25 17:51:44,524 INFO L78 Accepts]: Start accepts. Automaton has 8280 states and 11658 transitions. Word has length 70 [2021-11-25 17:51:44,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:44,524 INFO L470 AbstractCegarLoop]: Abstraction has 8280 states and 11658 transitions. [2021-11-25 17:51:44,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:44,524 INFO L276 IsEmpty]: Start isEmpty. Operand 8280 states and 11658 transitions. [2021-11-25 17:51:44,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 17:51:44,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:44,527 INFO L514 BasicCegarLoop]: 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] [2021-11-25 17:51:44,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-25 17:51:44,527 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:44,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:44,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1272855671, now seen corresponding path program 1 times [2021-11-25 17:51:44,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:44,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789271470] [2021-11-25 17:51:44,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:44,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:44,575 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:44,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789271470] [2021-11-25 17:51:44,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789271470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:44,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:44,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:51:44,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684526416] [2021-11-25 17:51:44,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:44,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:51:44,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:44,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:51:44,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:51:44,577 INFO L87 Difference]: Start difference. First operand 8280 states and 11658 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:45,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:45,545 INFO L93 Difference]: Finished difference Result 16478 states and 23353 transitions. [2021-11-25 17:51:45,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:51:45,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-25 17:51:45,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:45,557 INFO L225 Difference]: With dead ends: 16478 [2021-11-25 17:51:45,557 INFO L226 Difference]: Without dead ends: 11236 [2021-11-25 17:51:45,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:51:45,564 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 70 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:45,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 300 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:51:45,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11236 states. [2021-11-25 17:51:46,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11236 to 10362. [2021-11-25 17:51:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10362 states, 10361 states have (on average 1.4018917092944696) internal successors, (14525), 10361 states have internal predecessors, (14525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:46,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10362 states to 10362 states and 14525 transitions. [2021-11-25 17:51:46,463 INFO L78 Accepts]: Start accepts. Automaton has 10362 states and 14525 transitions. Word has length 73 [2021-11-25 17:51:46,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:46,463 INFO L470 AbstractCegarLoop]: Abstraction has 10362 states and 14525 transitions. [2021-11-25 17:51:46,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:46,463 INFO L276 IsEmpty]: Start isEmpty. Operand 10362 states and 14525 transitions. [2021-11-25 17:51:46,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 17:51:46,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:46,465 INFO L514 BasicCegarLoop]: 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] [2021-11-25 17:51:46,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-25 17:51:46,465 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:46,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:46,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1473717418, now seen corresponding path program 1 times [2021-11-25 17:51:46,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:46,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905349179] [2021-11-25 17:51:46,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:46,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:46,513 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:46,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905349179] [2021-11-25 17:51:46,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905349179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:46,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:46,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:51:46,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493290341] [2021-11-25 17:51:46,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:46,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:51:46,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:46,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:51:46,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:51:46,515 INFO L87 Difference]: Start difference. First operand 10362 states and 14525 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:48,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:48,047 INFO L93 Difference]: Finished difference Result 24047 states and 33826 transitions. [2021-11-25 17:51:48,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:51:48,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-25 17:51:48,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:48,063 INFO L225 Difference]: With dead ends: 24047 [2021-11-25 17:51:48,063 INFO L226 Difference]: Without dead ends: 14787 [2021-11-25 17:51:48,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:51:48,071 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 65 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:48,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 279 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:51:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14787 states. [2021-11-25 17:51:49,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14787 to 13595. [2021-11-25 17:51:49,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13595 states, 13594 states have (on average 1.3925261144622627) internal successors, (18930), 13594 states have internal predecessors, (18930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:49,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13595 states to 13595 states and 18930 transitions. [2021-11-25 17:51:49,264 INFO L78 Accepts]: Start accepts. Automaton has 13595 states and 18930 transitions. Word has length 76 [2021-11-25 17:51:49,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:49,265 INFO L470 AbstractCegarLoop]: Abstraction has 13595 states and 18930 transitions. [2021-11-25 17:51:49,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:49,265 INFO L276 IsEmpty]: Start isEmpty. Operand 13595 states and 18930 transitions. [2021-11-25 17:51:49,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 17:51:49,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:49,271 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:49,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-25 17:51:49,271 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:49,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:49,271 INFO L85 PathProgramCache]: Analyzing trace with hash -717739392, now seen corresponding path program 1 times [2021-11-25 17:51:49,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:49,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917390666] [2021-11-25 17:51:49,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:49,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 17:51:49,362 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:49,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917390666] [2021-11-25 17:51:49,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917390666] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:49,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:49,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:51:49,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283304978] [2021-11-25 17:51:49,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:49,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:51:49,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:49,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:51:49,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:51:49,364 INFO L87 Difference]: Start difference. First operand 13595 states and 18930 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:53,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:53,223 INFO L93 Difference]: Finished difference Result 52296 states and 72613 transitions. [2021-11-25 17:51:53,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 17:51:53,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-25 17:51:53,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:53,273 INFO L225 Difference]: With dead ends: 52296 [2021-11-25 17:51:53,273 INFO L226 Difference]: Without dead ends: 38990 [2021-11-25 17:51:53,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:51:53,292 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 634 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:53,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 436 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 17:51:53,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38990 states. [2021-11-25 17:51:56,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38990 to 23495. [2021-11-25 17:51:56,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23495 states, 23494 states have (on average 1.3637950114922959) internal successors, (32041), 23494 states have internal predecessors, (32041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:56,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23495 states to 23495 states and 32041 transitions. [2021-11-25 17:51:56,129 INFO L78 Accepts]: Start accepts. Automaton has 23495 states and 32041 transitions. Word has length 92 [2021-11-25 17:51:56,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:56,129 INFO L470 AbstractCegarLoop]: Abstraction has 23495 states and 32041 transitions. [2021-11-25 17:51:56,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:56,129 INFO L276 IsEmpty]: Start isEmpty. Operand 23495 states and 32041 transitions. [2021-11-25 17:51:56,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 17:51:56,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:56,137 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:56,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-25 17:51:56,138 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:56,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:56,138 INFO L85 PathProgramCache]: Analyzing trace with hash 899765499, now seen corresponding path program 1 times [2021-11-25 17:51:56,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:56,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061971995] [2021-11-25 17:51:56,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:56,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:56,544 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:56,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061971995] [2021-11-25 17:51:56,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061971995] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:56,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723476543] [2021-11-25 17:51:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:56,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:56,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2deda612-6394-4672-bbf4-5dee11975dba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:56,552 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2deda612-6394-4672-bbf4-5dee11975dba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:56,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2deda612-6394-4672-bbf4-5dee11975dba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 17:51:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:56,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-25 17:51:56,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 17:51:59,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:51:59,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723476543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:59,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:51:59,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [14] total 32 [2021-11-25 17:51:59,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111918577] [2021-11-25 17:51:59,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:59,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 17:51:59,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:59,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 17:51:59,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-11-25 17:51:59,560 INFO L87 Difference]: Start difference. First operand 23495 states and 32041 transitions. Second operand has 20 states, 20 states have (on average 4.45) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:05,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:05,562 INFO L93 Difference]: Finished difference Result 43202 states and 58837 transitions. [2021-11-25 17:52:05,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 17:52:05,562 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-25 17:52:05,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:05,602 INFO L225 Difference]: With dead ends: 43202 [2021-11-25 17:52:05,602 INFO L226 Difference]: Without dead ends: 35188 [2021-11-25 17:52:05,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 17:52:05,616 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 1673 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1673 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:05,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1673 Valid, 1471 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1458 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 17:52:05,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35188 states. [2021-11-25 17:52:09,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35188 to 28731. [2021-11-25 17:52:09,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28731 states, 28730 states have (on average 1.3587539157674904) internal successors, (39037), 28730 states have internal predecessors, (39037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:09,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28731 states to 28731 states and 39037 transitions. [2021-11-25 17:52:09,397 INFO L78 Accepts]: Start accepts. Automaton has 28731 states and 39037 transitions. Word has length 92 [2021-11-25 17:52:09,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:09,398 INFO L470 AbstractCegarLoop]: Abstraction has 28731 states and 39037 transitions. [2021-11-25 17:52:09,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:09,398 INFO L276 IsEmpty]: Start isEmpty. Operand 28731 states and 39037 transitions. [2021-11-25 17:52:09,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 17:52:09,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:09,407 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:52:09,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2deda612-6394-4672-bbf4-5dee11975dba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 17:52:09,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2deda612-6394-4672-bbf4-5dee11975dba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:09,632 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:52:09,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:09,633 INFO L85 PathProgramCache]: Analyzing trace with hash 2086751296, now seen corresponding path program 1 times [2021-11-25 17:52:09,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:52:09,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785817741] [2021-11-25 17:52:09,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:09,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:52:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:09,741 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 17:52:09,741 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:52:09,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785817741] [2021-11-25 17:52:09,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785817741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:52:09,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:52:09,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:52:09,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508882136] [2021-11-25 17:52:09,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:52:09,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 17:52:09,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:52:09,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 17:52:09,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:52:09,744 INFO L87 Difference]: Start difference. First operand 28731 states and 39037 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:17,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:17,904 INFO L93 Difference]: Finished difference Result 85313 states and 115952 transitions. [2021-11-25 17:52:17,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 17:52:17,905 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-25 17:52:17,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:17,982 INFO L225 Difference]: With dead ends: 85313 [2021-11-25 17:52:17,982 INFO L226 Difference]: Without dead ends: 57493 [2021-11-25 17:52:18,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-25 17:52:18,002 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 982 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:18,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [982 Valid, 226 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 17:52:18,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57493 states.