./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-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_ebcc2f74-d118-48ed-a560-0f4e30e28314/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcc2f74-d118-48ed-a560-0f4e30e28314/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_ebcc2f74-d118-48ed-a560-0f4e30e28314/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcc2f74-d118-48ed-a560-0f4e30e28314/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcc2f74-d118-48ed-a560-0f4e30e28314/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_ebcc2f74-d118-48ed-a560-0f4e30e28314/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 169d16a82e2efb21b41720aab8fadcf5ecf67324651e69e91d6cb4f921e3dcd4 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:24:12,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:24:12,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:24:12,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:24:12,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:24:12,958 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:24:12,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:24:12,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:24:12,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:24:12,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:24:12,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:24:12,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:24:12,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:24:12,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:24:12,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:24:12,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:24:12,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:24:12,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:24:12,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:24:12,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:24:12,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:24:12,988 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:24:12,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:24:12,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:24:12,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:24:12,998 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:24:12,999 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:24:13,000 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:24:13,001 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:24:13,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:24:13,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:24:13,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:24:13,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:24:13,007 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:24:13,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:24:13,009 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:24:13,010 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:24:13,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:24:13,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:24:13,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:24:13,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:24:13,018 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcc2f74-d118-48ed-a560-0f4e30e28314/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:24:13,064 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:24:13,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:24:13,065 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:24:13,065 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:24:13,066 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:24:13,067 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:24:13,067 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:24:13,067 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:24:13,068 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:24:13,068 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:24:13,068 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:24:13,068 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:24:13,069 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:24:13,069 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:24:13,069 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:24:13,070 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:24:13,070 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:24:13,070 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:24:13,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:24:13,071 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:24:13,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:24:13,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:24:13,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:24:13,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:24:13,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:24:13,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:24:13,073 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:24:13,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:24:13,074 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:24:13,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:24:13,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:24:13,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:24:13,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:24:13,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:24:13,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:24:13,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:24:13,077 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:24:13,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:24:13,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:24:13,078 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:24:13,078 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:24:13,078 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_ebcc2f74-d118-48ed-a560-0f4e30e28314/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcc2f74-d118-48ed-a560-0f4e30e28314/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 169d16a82e2efb21b41720aab8fadcf5ecf67324651e69e91d6cb4f921e3dcd4 [2021-11-25 19:24:13,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:24:13,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:24:13,419 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:24:13,420 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:24:13,421 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:24:13,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcc2f74-d118-48ed-a560-0f4e30e28314/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2021-11-25 19:24:13,512 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcc2f74-d118-48ed-a560-0f4e30e28314/bin/utaipan-eEHZpOm5b7/data/361815a24/39d6259414674888abef438a332b3c40/FLAG36f82d6f0 [2021-11-25 19:24:14,165 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:24:14,165 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcc2f74-d118-48ed-a560-0f4e30e28314/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2021-11-25 19:24:14,184 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcc2f74-d118-48ed-a560-0f4e30e28314/bin/utaipan-eEHZpOm5b7/data/361815a24/39d6259414674888abef438a332b3c40/FLAG36f82d6f0 [2021-11-25 19:24:14,395 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcc2f74-d118-48ed-a560-0f4e30e28314/bin/utaipan-eEHZpOm5b7/data/361815a24/39d6259414674888abef438a332b3c40 [2021-11-25 19:24:14,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:24:14,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:24:14,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:24:14,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:24:14,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:24:14,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:24:14" (1/1) ... [2021-11-25 19:24:14,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71f1e9c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:24:14, skipping insertion in model container [2021-11-25 19:24:14,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:24:14" (1/1) ... [2021-11-25 19:24:14,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:24:14,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:24:14,983 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_ebcc2f74-d118-48ed-a560-0f4e30e28314/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[13215,13228] [2021-11-25 19:24:15,184 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:24:15,213 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:24:15,350 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_ebcc2f74-d118-48ed-a560-0f4e30e28314/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[13215,13228] [2021-11-25 19:24:15,448 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:24:15,469 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:24:15,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:24:15 WrapperNode [2021-11-25 19:24:15,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:24:15,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:24:15,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:24:15,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:24:15,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:24:15" (1/1) ... [2021-11-25 19:24:15,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:24:15" (1/1) ... [2021-11-25 19:24:15,632 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1333 [2021-11-25 19:24:15,632 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:24:15,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:24:15,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:24:15,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:24:15,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:24:15" (1/1) ... [2021-11-25 19:24:15,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:24:15" (1/1) ... [2021-11-25 19:24:15,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:24:15" (1/1) ... [2021-11-25 19:24:15,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:24:15" (1/1) ... [2021-11-25 19:24:15,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:24:15" (1/1) ... [2021-11-25 19:24:15,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:24:15" (1/1) ... [2021-11-25 19:24:15,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:24:15" (1/1) ... [2021-11-25 19:24:15,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:24:15,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:24:15,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:24:15,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:24:15,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:24:15" (1/1) ... [2021-11-25 19:24:15,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:24:15,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcc2f74-d118-48ed-a560-0f4e30e28314/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:24:15,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcc2f74-d118-48ed-a560-0f4e30e28314/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:24:15,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebcc2f74-d118-48ed-a560-0f4e30e28314/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:24:15,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:24:15,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:24:15,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:24:15,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:24:16,066 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:24:16,068 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:24:17,364 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:24:17,954 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:24:17,954 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 19:24:17,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:24:17 BoogieIcfgContainer [2021-11-25 19:24:17,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:24:17,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:24:17,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:24:17,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:24:17,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:24:14" (1/3) ... [2021-11-25 19:24:17,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eac4bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:24:17, skipping insertion in model container [2021-11-25 19:24:17,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:24:15" (2/3) ... [2021-11-25 19:24:17,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eac4bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:24:17, skipping insertion in model container [2021-11-25 19:24:17,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:24:17" (3/3) ... [2021-11-25 19:24:17,969 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2021-11-25 19:24:17,976 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:24:17,976 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:24:18,039 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:24:18,048 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 19:24:18,048 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:24:18,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 255 states, 253 states have (on average 1.5454545454545454) internal successors, (391), 254 states have internal predecessors, (391), 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 19:24:18,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 19:24:18,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:24:18,154 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] [2021-11-25 19:24:18,155 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:24:18,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:24:18,164 INFO L85 PathProgramCache]: Analyzing trace with hash 2082156528, now seen corresponding path program 1 times [2021-11-25 19:24:18,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:24:18,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818439776] [2021-11-25 19:24:18,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:18,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:24:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:18,755 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 19:24:18,756 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:24:18,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818439776] [2021-11-25 19:24:18,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818439776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:24:18,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:24:18,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:24:18,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100629763] [2021-11-25 19:24:18,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:24:18,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:24:18,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:24:18,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:24:18,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:24:18,821 INFO L87 Difference]: Start difference. First operand has 255 states, 253 states have (on average 1.5454545454545454) internal successors, (391), 254 states have internal predecessors, (391), 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 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:24:19,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:24:19,196 INFO L93 Difference]: Finished difference Result 673 states and 1028 transitions. [2021-11-25 19:24:19,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:24:19,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-25 19:24:19,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:24:19,229 INFO L225 Difference]: With dead ends: 673 [2021-11-25 19:24:19,229 INFO L226 Difference]: Without dead ends: 422 [2021-11-25 19:24:19,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:24:19,244 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 584 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:24:19,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 751 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:24:19,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-11-25 19:24:19,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 420. [2021-11-25 19:24:19,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.5083532219570406) internal successors, (632), 419 states have internal predecessors, (632), 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 19:24:19,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 632 transitions. [2021-11-25 19:24:19,369 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 632 transitions. Word has length 52 [2021-11-25 19:24:19,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:24:19,370 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 632 transitions. [2021-11-25 19:24:19,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:24:19,373 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 632 transitions. [2021-11-25 19:24:19,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 19:24:19,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:24:19,385 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 19:24:19,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:24:19,387 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:24:19,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:24:19,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1223013843, now seen corresponding path program 1 times [2021-11-25 19:24:19,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:24:19,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264735523] [2021-11-25 19:24:19,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:19,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:24:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:19,706 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 19:24:19,707 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:24:19,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264735523] [2021-11-25 19:24:19,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264735523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:24:19,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:24:19,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:24:19,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92650149] [2021-11-25 19:24:19,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:24:19,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:24:19,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:24:19,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:24:19,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:24:19,713 INFO L87 Difference]: Start difference. First operand 420 states and 632 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 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 19:24:19,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:24:19,949 INFO L93 Difference]: Finished difference Result 1095 states and 1648 transitions. [2021-11-25 19:24:19,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:24:19,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 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 19:24:19,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:24:19,956 INFO L225 Difference]: With dead ends: 1095 [2021-11-25 19:24:19,956 INFO L226 Difference]: Without dead ends: 698 [2021-11-25 19:24:19,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:24:19,969 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 583 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:24:19,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 616 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:24:19,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-11-25 19:24:20,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 696. [2021-11-25 19:24:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 1.5007194244604316) internal successors, (1043), 695 states have internal predecessors, (1043), 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 19:24:20,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1043 transitions. [2021-11-25 19:24:20,040 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1043 transitions. Word has length 56 [2021-11-25 19:24:20,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:24:20,040 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 1043 transitions. [2021-11-25 19:24:20,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 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 19:24:20,041 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1043 transitions. [2021-11-25 19:24:20,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 19:24:20,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:24:20,045 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 19:24:20,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:24:20,046 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:24:20,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:24:20,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1094077442, now seen corresponding path program 1 times [2021-11-25 19:24:20,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:24:20,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753222828] [2021-11-25 19:24:20,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:20,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:24:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:20,248 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 19:24:20,248 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:24:20,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753222828] [2021-11-25 19:24:20,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753222828] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:24:20,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:24:20,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:24:20,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997191715] [2021-11-25 19:24:20,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:24:20,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:24:20,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:24:20,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:24:20,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:24:20,256 INFO L87 Difference]: Start difference. First operand 696 states and 1043 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 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 19:24:20,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:24:20,519 INFO L93 Difference]: Finished difference Result 1814 states and 2715 transitions. [2021-11-25 19:24:20,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:24:20,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 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 19:24:20,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:24:20,530 INFO L225 Difference]: With dead ends: 1814 [2021-11-25 19:24:20,530 INFO L226 Difference]: Without dead ends: 1154 [2021-11-25 19:24:20,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:24:20,541 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 292 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:24:20,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 921 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:24:20,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-11-25 19:24:20,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1152. [2021-11-25 19:24:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 1.4891398783666376) internal successors, (1714), 1151 states have internal predecessors, (1714), 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 19:24:20,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1714 transitions. [2021-11-25 19:24:20,627 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1714 transitions. Word has length 62 [2021-11-25 19:24:20,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:24:20,628 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 1714 transitions. [2021-11-25 19:24:20,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 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 19:24:20,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1714 transitions. [2021-11-25 19:24:20,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-25 19:24:20,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:24:20,633 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:24:20,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:24:20,634 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:24:20,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:24:20,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1817153353, now seen corresponding path program 1 times [2021-11-25 19:24:20,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:24:20,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084724268] [2021-11-25 19:24:20,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:20,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:24:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:20,804 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 19:24:20,804 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:24:20,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084724268] [2021-11-25 19:24:20,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084724268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:24:20,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:24:20,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:24:20,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663306266] [2021-11-25 19:24:20,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:24:20,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:24:20,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:24:20,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:24:20,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:24:20,808 INFO L87 Difference]: Start difference. First operand 1152 states and 1714 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 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 19:24:21,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:24:21,101 INFO L93 Difference]: Finished difference Result 2977 states and 4414 transitions. [2021-11-25 19:24:21,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:24:21,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 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 68 [2021-11-25 19:24:21,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:24:21,116 INFO L225 Difference]: With dead ends: 2977 [2021-11-25 19:24:21,116 INFO L226 Difference]: Without dead ends: 1874 [2021-11-25 19:24:21,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:24:21,119 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 567 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:24:21,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 650 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:24:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-11-25 19:24:21,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1872. [2021-11-25 19:24:21,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1871 states have (on average 1.4714056654195617) internal successors, (2753), 1871 states have internal predecessors, (2753), 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 19:24:21,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2753 transitions. [2021-11-25 19:24:21,264 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2753 transitions. Word has length 68 [2021-11-25 19:24:21,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:24:21,264 INFO L470 AbstractCegarLoop]: Abstraction has 1872 states and 2753 transitions. [2021-11-25 19:24:21,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 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 19:24:21,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2753 transitions. [2021-11-25 19:24:21,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 19:24:21,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:24:21,270 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:24:21,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:24:21,270 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:24:21,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:24:21,271 INFO L85 PathProgramCache]: Analyzing trace with hash 316619168, now seen corresponding path program 1 times [2021-11-25 19:24:21,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:24:21,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066285393] [2021-11-25 19:24:21,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:21,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:24:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:21,412 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 19:24:21,412 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:24:21,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066285393] [2021-11-25 19:24:21,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066285393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:24:21,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:24:21,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:24:21,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062085016] [2021-11-25 19:24:21,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:24:21,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:24:21,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:24:21,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:24:21,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:24:21,421 INFO L87 Difference]: Start difference. First operand 1872 states and 2753 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 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 19:24:21,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:24:21,852 INFO L93 Difference]: Finished difference Result 4740 states and 6921 transitions. [2021-11-25 19:24:21,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:24:21,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 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 74 [2021-11-25 19:24:21,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:24:21,874 INFO L225 Difference]: With dead ends: 4740 [2021-11-25 19:24:21,875 INFO L226 Difference]: Without dead ends: 2930 [2021-11-25 19:24:21,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:24:21,880 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 291 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:24:21,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 773 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:24:21,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2021-11-25 19:24:22,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 2928. [2021-11-25 19:24:22,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2927 states have (on average 1.4431158182439359) internal successors, (4224), 2927 states have internal predecessors, (4224), 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 19:24:22,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 4224 transitions. [2021-11-25 19:24:22,174 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 4224 transitions. Word has length 74 [2021-11-25 19:24:22,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:24:22,177 INFO L470 AbstractCegarLoop]: Abstraction has 2928 states and 4224 transitions. [2021-11-25 19:24:22,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 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 19:24:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 4224 transitions. [2021-11-25 19:24:22,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-25 19:24:22,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:24:22,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:24:22,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:24:22,194 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:24:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:24:22,197 INFO L85 PathProgramCache]: Analyzing trace with hash -683013599, now seen corresponding path program 1 times [2021-11-25 19:24:22,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:24:22,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26444235] [2021-11-25 19:24:22,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:22,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:24:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:22,528 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 19:24:22,529 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:24:22,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26444235] [2021-11-25 19:24:22,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26444235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:24:22,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:24:22,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:24:22,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786290566] [2021-11-25 19:24:22,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:24:22,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:24:22,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:24:22,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:24:22,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:24:22,534 INFO L87 Difference]: Start difference. First operand 2928 states and 4224 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 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 19:24:24,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:24:24,322 INFO L93 Difference]: Finished difference Result 14891 states and 21262 transitions. [2021-11-25 19:24:24,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:24:24,323 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 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 80 [2021-11-25 19:24:24,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:24:24,408 INFO L225 Difference]: With dead ends: 14891 [2021-11-25 19:24:24,409 INFO L226 Difference]: Without dead ends: 12019 [2021-11-25 19:24:24,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:24:24,421 INFO L933 BasicCegarLoop]: 667 mSDtfsCounter, 2207 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2207 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:24:24,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2207 Valid, 1773 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:24:24,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12019 states. [2021-11-25 19:24:25,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12019 to 12011. [2021-11-25 19:24:25,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12011 states, 12010 states have (on average 1.4208992506244795) internal successors, (17065), 12010 states have internal predecessors, (17065), 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 19:24:25,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12011 states to 12011 states and 17065 transitions. [2021-11-25 19:24:25,829 INFO L78 Accepts]: Start accepts. Automaton has 12011 states and 17065 transitions. Word has length 80 [2021-11-25 19:24:25,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:24:25,829 INFO L470 AbstractCegarLoop]: Abstraction has 12011 states and 17065 transitions. [2021-11-25 19:24:25,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 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 19:24:25,830 INFO L276 IsEmpty]: Start isEmpty. Operand 12011 states and 17065 transitions. [2021-11-25 19:24:25,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-25 19:24:25,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:24:25,865 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:24:25,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:24:25,866 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:24:25,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:24:25,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1092803663, now seen corresponding path program 1 times [2021-11-25 19:24:25,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:24:25,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665089288] [2021-11-25 19:24:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:25,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:24:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:26,090 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 19:24:26,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:24:26,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665089288] [2021-11-25 19:24:26,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665089288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:24:26,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:24:26,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:24:26,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599218000] [2021-11-25 19:24:26,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:24:26,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:24:26,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:24:26,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:24:26,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:24:26,094 INFO L87 Difference]: Start difference. First operand 12011 states and 17065 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 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 19:24:28,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:24:28,214 INFO L93 Difference]: Finished difference Result 29215 states and 41661 transitions. [2021-11-25 19:24:28,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:24:28,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 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 84 [2021-11-25 19:24:28,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:24:28,319 INFO L225 Difference]: With dead ends: 29215 [2021-11-25 19:24:28,319 INFO L226 Difference]: Without dead ends: 17229 [2021-11-25 19:24:28,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:24:28,346 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 363 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:24:28,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 665 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:24:28,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17229 states. [2021-11-25 19:24:30,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17229 to 17227. [2021-11-25 19:24:30,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17227 states, 17226 states have (on average 1.4140253105770346) internal successors, (24358), 17226 states have internal predecessors, (24358), 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 19:24:30,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17227 states to 17227 states and 24358 transitions. [2021-11-25 19:24:30,157 INFO L78 Accepts]: Start accepts. Automaton has 17227 states and 24358 transitions. Word has length 84 [2021-11-25 19:24:30,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:24:30,158 INFO L470 AbstractCegarLoop]: Abstraction has 17227 states and 24358 transitions. [2021-11-25 19:24:30,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 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 19:24:30,159 INFO L276 IsEmpty]: Start isEmpty. Operand 17227 states and 24358 transitions. [2021-11-25 19:24:30,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-25 19:24:30,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:24:30,207 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:24:30,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:24:30,207 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:24:30,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:24:30,208 INFO L85 PathProgramCache]: Analyzing trace with hash -842864758, now seen corresponding path program 1 times [2021-11-25 19:24:30,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:24:30,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119675013] [2021-11-25 19:24:30,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:30,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:24:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:30,460 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 19:24:30,460 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:24:30,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119675013] [2021-11-25 19:24:30,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119675013] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:24:30,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:24:30,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:24:30,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55376438] [2021-11-25 19:24:30,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:24:30,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:24:30,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:24:30,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:24:30,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:24:30,464 INFO L87 Difference]: Start difference. First operand 17227 states and 24358 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 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 19:24:35,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:24:35,630 INFO L93 Difference]: Finished difference Result 65257 states and 92401 transitions. [2021-11-25 19:24:35,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:24:35,631 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 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 84 [2021-11-25 19:24:35,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:24:35,809 INFO L225 Difference]: With dead ends: 65257 [2021-11-25 19:24:35,809 INFO L226 Difference]: Without dead ends: 48068 [2021-11-25 19:24:35,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:24:35,851 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 1750 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1750 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:24:35,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1750 Valid, 850 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-25 19:24:35,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48068 states. [2021-11-25 19:24:39,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48068 to 25651. [2021-11-25 19:24:39,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25651 states, 25650 states have (on average 1.396803118908382) internal successors, (35828), 25650 states have internal predecessors, (35828), 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 19:24:39,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25651 states to 25651 states and 35828 transitions. [2021-11-25 19:24:39,347 INFO L78 Accepts]: Start accepts. Automaton has 25651 states and 35828 transitions. Word has length 84 [2021-11-25 19:24:39,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:24:39,354 INFO L470 AbstractCegarLoop]: Abstraction has 25651 states and 35828 transitions. [2021-11-25 19:24:39,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 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 19:24:39,354 INFO L276 IsEmpty]: Start isEmpty. Operand 25651 states and 35828 transitions. [2021-11-25 19:24:39,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-25 19:24:39,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:24:39,439 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:24:39,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 19:24:39,439 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:24:39,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:24:39,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1413281339, now seen corresponding path program 1 times [2021-11-25 19:24:39,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:24:39,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791435955] [2021-11-25 19:24:39,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:39,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:24:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:41,232 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 19:24:41,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:24:41,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791435955] [2021-11-25 19:24:41,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791435955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:24:41,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:24:41,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-25 19:24:41,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120835596] [2021-11-25 19:24:41,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:24:41,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 19:24:41,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:24:41,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 19:24:41,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-11-25 19:24:41,236 INFO L87 Difference]: Start difference. First operand 25651 states and 35828 transitions. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 17 states have internal predecessors, (84), 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 19:24:55,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:24:55,062 INFO L93 Difference]: Finished difference Result 85949 states and 119371 transitions. [2021-11-25 19:24:55,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-25 19:24:55,063 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 17 states have internal predecessors, (84), 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 84 [2021-11-25 19:24:55,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:24:55,233 INFO L225 Difference]: With dead ends: 85949 [2021-11-25 19:24:55,233 INFO L226 Difference]: Without dead ends: 67197 [2021-11-25 19:24:55,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2021-11-25 19:24:55,290 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 5433 mSDsluCounter, 4220 mSDsCounter, 0 mSdLazyCounter, 5004 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5433 SdHoareTripleChecker+Valid, 4778 SdHoareTripleChecker+Invalid, 5367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 5004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:24:55,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5433 Valid, 4778 Invalid, 5367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 5004 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-25 19:24:55,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67197 states. [2021-11-25 19:25:00,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67197 to 44843. [2021-11-25 19:25:00,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44843 states, 44842 states have (on average 1.3743142589536594) internal successors, (61627), 44842 states have internal predecessors, (61627), 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 19:25:00,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44843 states to 44843 states and 61627 transitions. [2021-11-25 19:25:00,684 INFO L78 Accepts]: Start accepts. Automaton has 44843 states and 61627 transitions. Word has length 84 [2021-11-25 19:25:00,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:00,685 INFO L470 AbstractCegarLoop]: Abstraction has 44843 states and 61627 transitions. [2021-11-25 19:25:00,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 17 states have internal predecessors, (84), 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 19:25:00,686 INFO L276 IsEmpty]: Start isEmpty. Operand 44843 states and 61627 transitions. [2021-11-25 19:25:00,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-25 19:25:00,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:00,849 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:25:00,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 19:25:00,850 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:00,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:00,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1809151606, now seen corresponding path program 1 times [2021-11-25 19:25:00,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:00,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022560622] [2021-11-25 19:25:00,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:00,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:00,969 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 19:25:00,969 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:00,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022560622] [2021-11-25 19:25:00,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022560622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:25:00,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:25:00,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:25:00,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381934466] [2021-11-25 19:25:00,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:00,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:25:00,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:00,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:25:00,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:25:00,972 INFO L87 Difference]: Start difference. First operand 44843 states and 61627 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 19:25:06,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:06,322 INFO L93 Difference]: Finished difference Result 80908 states and 111777 transitions. [2021-11-25 19:25:06,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:25:06,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 84 [2021-11-25 19:25:06,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:06,447 INFO L225 Difference]: With dead ends: 80908 [2021-11-25 19:25:06,448 INFO L226 Difference]: Without dead ends: 55820 [2021-11-25 19:25:06,480 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 19:25:06,481 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 281 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:06,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 854 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:25:06,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55820 states. [2021-11-25 19:25:11,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55820 to 55818. [2021-11-25 19:25:11,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55818 states, 55817 states have (on average 1.3742945697547342) internal successors, (76709), 55817 states have internal predecessors, (76709), 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 19:25:11,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55818 states to 55818 states and 76709 transitions. [2021-11-25 19:25:11,914 INFO L78 Accepts]: Start accepts. Automaton has 55818 states and 76709 transitions. Word has length 84 [2021-11-25 19:25:11,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:11,916 INFO L470 AbstractCegarLoop]: Abstraction has 55818 states and 76709 transitions. [2021-11-25 19:25:11,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 19:25:11,916 INFO L276 IsEmpty]: Start isEmpty. Operand 55818 states and 76709 transitions. [2021-11-25 19:25:12,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-25 19:25:12,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:12,011 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:25:12,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 19:25:12,012 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:12,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:12,013 INFO L85 PathProgramCache]: Analyzing trace with hash 375800929, now seen corresponding path program 1 times [2021-11-25 19:25:12,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:12,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023293994] [2021-11-25 19:25:12,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:12,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:12,111 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 19:25:12,111 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:12,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023293994] [2021-11-25 19:25:12,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023293994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:25:12,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:25:12,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:25:12,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590632602] [2021-11-25 19:25:12,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:12,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:25:12,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:12,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:25:12,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:25:12,115 INFO L87 Difference]: Start difference. First operand 55818 states and 76709 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 19:25:18,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:18,377 INFO L93 Difference]: Finished difference Result 95982 states and 132026 transitions. [2021-11-25 19:25:18,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:25:18,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 84 [2021-11-25 19:25:18,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:18,545 INFO L225 Difference]: With dead ends: 95982 [2021-11-25 19:25:18,545 INFO L226 Difference]: Without dead ends: 76886 [2021-11-25 19:25:18,585 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 19:25:18,586 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 262 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:18,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 893 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:25:18,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76886 states.