./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/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_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/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_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/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 3fb71e8e4e407700549b8952f3afdeeffa0973a11e08bb7f18bca04e4b75e49d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:49:34,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:49:34,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:49:35,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:49:35,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:49:35,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:49:35,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:49:35,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:49:35,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:49:35,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:49:35,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:49:35,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:49:35,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:49:35,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:49:35,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:49:35,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:49:35,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:49:35,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:49:35,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:49:35,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:49:35,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:49:35,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:49:35,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:49:35,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:49:35,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:49:35,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:49:35,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:49:35,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:49:35,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:49:35,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:49:35,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:49:35,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:49:35,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:49:35,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:49:35,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:49:35,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:49:35,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:49:35,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:49:35,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:49:35,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:49:35,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:49:35,066 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 17:49:35,111 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:49:35,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:49:35,112 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:49:35,112 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:49:35,116 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:49:35,116 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:49:35,116 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:49:35,117 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:49:35,117 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:49:35,117 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:49:35,118 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:49:35,119 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:49:35,119 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:49:35,119 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:49:35,119 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:49:35,120 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:49:35,120 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:49:35,120 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:49:35,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:49:35,121 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:49:35,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:49:35,121 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:49:35,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:49:35,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:49:35,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:49:35,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:49:35,122 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:49:35,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:49:35,123 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:49:35,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:49:35,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:49:35,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:49:35,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:49:35,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:49:35,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:49:35,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:49:35,125 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:49:35,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:49:35,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:49:35,125 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:49:35,126 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:49:35,126 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_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3fb71e8e4e407700549b8952f3afdeeffa0973a11e08bb7f18bca04e4b75e49d [2021-11-25 17:49:35,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:49:35,413 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:49:35,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:49:35,418 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:49:35,419 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:49:35,420 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-25 17:49:35,480 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/bin/utaipan-eEHZpOm5b7/data/6c0e752a6/0b2469b2e1984e079b10b73afcc3d4e8/FLAG179295a84 [2021-11-25 17:49:35,942 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:49:35,943 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-25 17:49:35,957 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/bin/utaipan-eEHZpOm5b7/data/6c0e752a6/0b2469b2e1984e079b10b73afcc3d4e8/FLAG179295a84 [2021-11-25 17:49:36,298 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/bin/utaipan-eEHZpOm5b7/data/6c0e752a6/0b2469b2e1984e079b10b73afcc3d4e8 [2021-11-25 17:49:36,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:49:36,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:49:36,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:49:36,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:49:36,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:49:36,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:36,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fe3d0a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36, skipping insertion in model container [2021-11-25 17:49:36,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:36,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:49:36,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:49:36,666 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_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[10378,10391] [2021-11-25 17:49:36,732 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:49:36,746 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:49:36,839 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_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[10378,10391] [2021-11-25 17:49:36,909 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:49:36,939 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:49:36,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36 WrapperNode [2021-11-25 17:49:36,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:49:36,941 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:49:36,941 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:49:36,941 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:49:36,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:36,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:37,038 INFO L137 Inliner]: procedures = 27, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 830 [2021-11-25 17:49:37,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:49:37,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:49:37,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:49:37,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:49:37,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:37,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:37,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:37,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:37,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:37,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:37,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:37,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:49:37,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:49:37,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:49:37,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:49:37,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:37,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:49:37,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:37,119 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:49:37,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:49:37,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:49:37,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:49:37,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:49:37,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:49:37,298 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:49:37,304 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:49:38,130 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:49:38,425 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:49:38,425 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 17:49:38,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:49:38 BoogieIcfgContainer [2021-11-25 17:49:38,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:49:38,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:49:38,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:49:38,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:49:38,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:49:36" (1/3) ... [2021-11-25 17:49:38,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac7d4c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:49:38, skipping insertion in model container [2021-11-25 17:49:38,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (2/3) ... [2021-11-25 17:49:38,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac7d4c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:49:38, skipping insertion in model container [2021-11-25 17:49:38,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:49:38" (3/3) ... [2021-11-25 17:49:38,440 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-25 17:49:38,449 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:49:38,449 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 17:49:38,525 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:49:38,537 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 17:49:38,537 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 17:49:38,570 INFO L276 IsEmpty]: Start isEmpty. Operand has 144 states, 142 states have (on average 1.7746478873239437) internal successors, (252), 143 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:38,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 17:49:38,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:38,588 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:38,589 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:49:38,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:38,599 INFO L85 PathProgramCache]: Analyzing trace with hash -299843787, now seen corresponding path program 1 times [2021-11-25 17:49:38,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:38,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648730468] [2021-11-25 17:49:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:38,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:39,181 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:39,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648730468] [2021-11-25 17:49:39,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648730468] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:39,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:39,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:49:39,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231910070] [2021-11-25 17:49:39,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:39,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:49:39,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:39,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:49:39,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:49:39,234 INFO L87 Difference]: Start difference. First operand has 144 states, 142 states have (on average 1.7746478873239437) internal successors, (252), 143 states have internal predecessors, (252), 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 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:39,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:39,529 INFO L93 Difference]: Finished difference Result 221 states and 369 transitions. [2021-11-25 17:49:39,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:49:39,531 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-25 17:49:39,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:39,546 INFO L225 Difference]: With dead ends: 221 [2021-11-25 17:49:39,547 INFO L226 Difference]: Without dead ends: 142 [2021-11-25 17:49:39,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:49:39,560 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 600 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:39,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 220 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:49:39,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-25 17:49:39,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-25 17:49:39,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.2127659574468086) internal successors, (171), 141 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:39,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 171 transitions. [2021-11-25 17:49:39,640 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 171 transitions. Word has length 92 [2021-11-25 17:49:39,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:39,642 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 171 transitions. [2021-11-25 17:49:39,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:39,642 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 171 transitions. [2021-11-25 17:49:39,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-25 17:49:39,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:39,648 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:39,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 17:49:39,649 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:49:39,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:39,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1832257677, now seen corresponding path program 1 times [2021-11-25 17:49:39,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:39,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844667629] [2021-11-25 17:49:39,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:39,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:39,917 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:39,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844667629] [2021-11-25 17:49:39,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844667629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:39,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:39,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:49:39,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099094566] [2021-11-25 17:49:39,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:39,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:49:39,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:39,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:49:39,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:49:39,923 INFO L87 Difference]: Start difference. First operand 142 states and 171 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:40,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:40,073 INFO L93 Difference]: Finished difference Result 221 states and 276 transitions. [2021-11-25 17:49:40,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:49:40,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 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 93 [2021-11-25 17:49:40,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:40,078 INFO L225 Difference]: With dead ends: 221 [2021-11-25 17:49:40,079 INFO L226 Difference]: Without dead ends: 142 [2021-11-25 17:49:40,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:49:40,086 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 420 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:40,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 105 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:49:40,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-25 17:49:40,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-25 17:49:40,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.198581560283688) internal successors, (169), 141 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:40,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 169 transitions. [2021-11-25 17:49:40,114 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 169 transitions. Word has length 93 [2021-11-25 17:49:40,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:40,115 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 169 transitions. [2021-11-25 17:49:40,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:40,115 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 169 transitions. [2021-11-25 17:49:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-25 17:49:40,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:40,117 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:40,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 17:49:40,120 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:49:40,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:40,126 INFO L85 PathProgramCache]: Analyzing trace with hash 2137785077, now seen corresponding path program 1 times [2021-11-25 17:49:40,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:40,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080852982] [2021-11-25 17:49:40,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:40,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:40,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:40,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080852982] [2021-11-25 17:49:40,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080852982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:40,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:40,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:49:40,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429671296] [2021-11-25 17:49:40,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:40,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:49:40,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:40,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:49:40,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:49:40,272 INFO L87 Difference]: Start difference. First operand 142 states and 169 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:40,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:40,408 INFO L93 Difference]: Finished difference Result 217 states and 268 transitions. [2021-11-25 17:49:40,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:49:40,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 94 [2021-11-25 17:49:40,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:40,411 INFO L225 Difference]: With dead ends: 217 [2021-11-25 17:49:40,412 INFO L226 Difference]: Without dead ends: 142 [2021-11-25 17:49:40,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:49:40,420 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 402 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:40,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 113 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:49:40,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-25 17:49:40,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-25 17:49:40,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1843971631205674) internal successors, (167), 141 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:40,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 167 transitions. [2021-11-25 17:49:40,441 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 167 transitions. Word has length 94 [2021-11-25 17:49:40,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:40,448 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 167 transitions. [2021-11-25 17:49:40,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:40,448 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 167 transitions. [2021-11-25 17:49:40,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 17:49:40,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:40,457 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:40,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 17:49:40,457 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:49:40,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:40,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1225797977, now seen corresponding path program 1 times [2021-11-25 17:49:40,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:40,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225882303] [2021-11-25 17:49:40,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:40,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:40,566 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:40,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225882303] [2021-11-25 17:49:40,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225882303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:40,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:40,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:49:40,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367440198] [2021-11-25 17:49:40,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:40,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:49:40,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:40,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:49:40,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:49:40,570 INFO L87 Difference]: Start difference. First operand 142 states and 167 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:40,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:40,715 INFO L93 Difference]: Finished difference Result 225 states and 273 transitions. [2021-11-25 17:49:40,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:49:40,715 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 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 95 [2021-11-25 17:49:40,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:40,717 INFO L225 Difference]: With dead ends: 225 [2021-11-25 17:49:40,717 INFO L226 Difference]: Without dead ends: 142 [2021-11-25 17:49:40,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:49:40,719 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 419 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:40,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 97 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:49:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-25 17:49:40,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-25 17:49:40,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1702127659574468) internal successors, (165), 141 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 165 transitions. [2021-11-25 17:49:40,732 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 165 transitions. Word has length 95 [2021-11-25 17:49:40,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:40,733 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 165 transitions. [2021-11-25 17:49:40,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:40,733 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 165 transitions. [2021-11-25 17:49:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-25 17:49:40,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:40,734 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:40,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 17:49:40,735 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:49:40,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:40,735 INFO L85 PathProgramCache]: Analyzing trace with hash -2060914787, now seen corresponding path program 1 times [2021-11-25 17:49:40,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:40,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805075605] [2021-11-25 17:49:40,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:40,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:40,827 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:40,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805075605] [2021-11-25 17:49:40,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805075605] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:40,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:40,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:49:40,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168969475] [2021-11-25 17:49:40,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:40,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:49:40,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:40,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:49:40,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:49:40,829 INFO L87 Difference]: Start difference. First operand 142 states and 165 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:40,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:40,972 INFO L93 Difference]: Finished difference Result 229 states and 274 transitions. [2021-11-25 17:49:40,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:49:40,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 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 96 [2021-11-25 17:49:40,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:40,974 INFO L225 Difference]: With dead ends: 229 [2021-11-25 17:49:40,974 INFO L226 Difference]: Without dead ends: 142 [2021-11-25 17:49:40,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:49:40,976 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 355 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:40,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 119 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:49:40,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-25 17:49:40,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-25 17:49:40,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1631205673758864) internal successors, (164), 141 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:40,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 164 transitions. [2021-11-25 17:49:40,989 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 164 transitions. Word has length 96 [2021-11-25 17:49:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:40,989 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 164 transitions. [2021-11-25 17:49:40,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:40,990 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 164 transitions. [2021-11-25 17:49:40,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-25 17:49:40,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:40,991 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:40,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 17:49:40,991 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:49:40,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:40,992 INFO L85 PathProgramCache]: Analyzing trace with hash 49922267, now seen corresponding path program 1 times [2021-11-25 17:49:40,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:40,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230680069] [2021-11-25 17:49:40,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:40,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:41,076 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:41,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230680069] [2021-11-25 17:49:41,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230680069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:41,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:41,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:49:41,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012594758] [2021-11-25 17:49:41,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:41,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:49:41,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:41,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:49:41,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:49:41,078 INFO L87 Difference]: Start difference. First operand 142 states and 164 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:41,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:41,189 INFO L93 Difference]: Finished difference Result 205 states and 247 transitions. [2021-11-25 17:49:41,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:49:41,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 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 97 [2021-11-25 17:49:41,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:41,191 INFO L225 Difference]: With dead ends: 205 [2021-11-25 17:49:41,191 INFO L226 Difference]: Without dead ends: 142 [2021-11-25 17:49:41,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:49:41,193 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 353 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:41,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 137 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:49:41,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-25 17:49:41,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-25 17:49:41,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.148936170212766) internal successors, (162), 141 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:41,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 162 transitions. [2021-11-25 17:49:41,220 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 162 transitions. Word has length 97 [2021-11-25 17:49:41,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:41,220 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 162 transitions. [2021-11-25 17:49:41,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:41,220 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 162 transitions. [2021-11-25 17:49:41,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-25 17:49:41,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:41,221 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:41,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 17:49:41,222 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:49:41,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:41,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2122168691, now seen corresponding path program 1 times [2021-11-25 17:49:41,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:41,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640198005] [2021-11-25 17:49:41,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:41,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:41,335 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:41,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640198005] [2021-11-25 17:49:41,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640198005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:41,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:41,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:49:41,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346270329] [2021-11-25 17:49:41,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:41,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:49:41,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:41,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:49:41,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:49:41,338 INFO L87 Difference]: Start difference. First operand 142 states and 162 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:41,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:41,448 INFO L93 Difference]: Finished difference Result 209 states and 248 transitions. [2021-11-25 17:49:41,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:49:41,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 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 98 [2021-11-25 17:49:41,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:41,449 INFO L225 Difference]: With dead ends: 209 [2021-11-25 17:49:41,449 INFO L226 Difference]: Without dead ends: 142 [2021-11-25 17:49:41,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:49:41,451 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 355 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:41,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 129 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:49:41,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-25 17:49:41,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-25 17:49:41,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1347517730496455) internal successors, (160), 141 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:41,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 160 transitions. [2021-11-25 17:49:41,464 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 160 transitions. Word has length 98 [2021-11-25 17:49:41,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:41,464 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 160 transitions. [2021-11-25 17:49:41,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:41,465 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 160 transitions. [2021-11-25 17:49:41,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-25 17:49:41,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:41,466 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:41,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 17:49:41,466 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:49:41,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:41,467 INFO L85 PathProgramCache]: Analyzing trace with hash 290431503, now seen corresponding path program 1 times [2021-11-25 17:49:41,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:41,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213910552] [2021-11-25 17:49:41,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:41,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:55,797 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:55,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213910552] [2021-11-25 17:49:55,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213910552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:55,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:55,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-25 17:49:55,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513490048] [2021-11-25 17:49:55,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:55,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 17:49:55,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:55,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 17:49:55,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2052, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 17:49:55,801 INFO L87 Difference]: Start difference. First operand 142 states and 160 transitions. Second operand has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:16,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:16,123 INFO L93 Difference]: Finished difference Result 292 states and 364 transitions. [2021-11-25 17:50:16,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 17:50:16,123 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 states have internal predecessors, (99), 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 99 [2021-11-25 17:50:16,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:16,126 INFO L225 Difference]: With dead ends: 292 [2021-11-25 17:50:16,126 INFO L226 Difference]: Without dead ends: 242 [2021-11-25 17:50:16,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=1807, Invalid=5675, Unknown=0, NotChecked=0, Total=7482 [2021-11-25 17:50:16,130 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 1377 mSDsluCounter, 2004 mSDsCounter, 0 mSdLazyCounter, 3973 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1377 SdHoareTripleChecker+Valid, 2170 SdHoareTripleChecker+Invalid, 4036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 3973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:16,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1377 Valid, 2170 Invalid, 4036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 3973 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-25 17:50:16,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-25 17:50:16,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 238. [2021-11-25 17:50:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.2320675105485233) internal successors, (292), 237 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 292 transitions. [2021-11-25 17:50:16,157 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 292 transitions. Word has length 99 [2021-11-25 17:50:16,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:16,158 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 292 transitions. [2021-11-25 17:50:16,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:16,158 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 292 transitions. [2021-11-25 17:50:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-25 17:50:16,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:16,159 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:50:16,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 17:50:16,159 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:16,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:16,160 INFO L85 PathProgramCache]: Analyzing trace with hash 917023825, now seen corresponding path program 1 times [2021-11-25 17:50:16,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:16,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505158916] [2021-11-25 17:50:16,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:16,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:16,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:16,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505158916] [2021-11-25 17:50:16,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505158916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:16,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:16,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:50:16,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282709901] [2021-11-25 17:50:16,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:16,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:50:16,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:16,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:50:16,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:50:16,342 INFO L87 Difference]: Start difference. First operand 238 states and 292 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:16,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:16,439 INFO L93 Difference]: Finished difference Result 481 states and 625 transitions. [2021-11-25 17:50:16,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:50:16,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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 101 [2021-11-25 17:50:16,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:16,442 INFO L225 Difference]: With dead ends: 481 [2021-11-25 17:50:16,443 INFO L226 Difference]: Without dead ends: 335 [2021-11-25 17:50:16,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:50:16,446 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 62 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:16,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 412 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:50:16,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-25 17:50:16,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 333. [2021-11-25 17:50:16,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.2680722891566265) internal successors, (421), 332 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:16,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 421 transitions. [2021-11-25 17:50:16,493 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 421 transitions. Word has length 101 [2021-11-25 17:50:16,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:16,493 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 421 transitions. [2021-11-25 17:50:16,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:16,494 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 421 transitions. [2021-11-25 17:50:16,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-25 17:50:16,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:16,495 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:50:16,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 17:50:16,495 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:16,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:16,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1144776020, now seen corresponding path program 1 times [2021-11-25 17:50:16,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:16,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133429517] [2021-11-25 17:50:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:16,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:30,190 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:30,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133429517] [2021-11-25 17:50:30,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133429517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:30,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:30,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-11-25 17:50:30,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173693667] [2021-11-25 17:50:30,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:30,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-25 17:50:30,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:30,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-25 17:50:30,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2451, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 17:50:30,194 INFO L87 Difference]: Start difference. First operand 333 states and 421 transitions. Second operand has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:51,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:51,775 INFO L93 Difference]: Finished difference Result 630 states and 824 transitions. [2021-11-25 17:50:51,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-25 17:50:51,777 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 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 101 [2021-11-25 17:50:51,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:51,780 INFO L225 Difference]: With dead ends: 630 [2021-11-25 17:50:51,780 INFO L226 Difference]: Without dead ends: 389 [2021-11-25 17:50:51,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=1871, Invalid=6319, Unknown=0, NotChecked=0, Total=8190 [2021-11-25 17:50:51,785 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 1383 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 2971 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 3057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:51,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1383 Valid, 1386 Invalid, 3057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2971 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-25 17:50:51,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-25 17:50:51,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 382. [2021-11-25 17:50:51,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.272965879265092) internal successors, (485), 381 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:51,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 485 transitions. [2021-11-25 17:50:51,837 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 485 transitions. Word has length 101 [2021-11-25 17:50:51,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:51,838 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 485 transitions. [2021-11-25 17:50:51,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:51,838 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 485 transitions. [2021-11-25 17:50:51,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-25 17:50:51,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:51,840 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:50:51,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 17:50:51,840 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:51,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:51,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1142734549, now seen corresponding path program 1 times [2021-11-25 17:50:51,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:51,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633651606] [2021-11-25 17:50:51,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:51,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:51,926 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:51,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633651606] [2021-11-25 17:50:51,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633651606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:51,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:51,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:50:51,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708988747] [2021-11-25 17:50:51,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:51,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:50:51,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:51,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:50:51,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:50:51,929 INFO L87 Difference]: Start difference. First operand 382 states and 485 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:52,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:52,168 INFO L93 Difference]: Finished difference Result 662 states and 858 transitions. [2021-11-25 17:50:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 17:50:52,170 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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 102 [2021-11-25 17:50:52,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:52,173 INFO L225 Difference]: With dead ends: 662 [2021-11-25 17:50:52,174 INFO L226 Difference]: Without dead ends: 564 [2021-11-25 17:50:52,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-25 17:50:52,175 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 330 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:52,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 850 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:50:52,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-11-25 17:50:52,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 333. [2021-11-25 17:50:52,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.2530120481927711) internal successors, (416), 332 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:52,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 416 transitions. [2021-11-25 17:50:52,239 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 416 transitions. Word has length 102 [2021-11-25 17:50:52,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:52,240 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 416 transitions. [2021-11-25 17:50:52,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:52,240 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 416 transitions. [2021-11-25 17:50:52,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-25 17:50:52,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:52,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:50:52,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 17:50:52,243 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:52,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:52,243 INFO L85 PathProgramCache]: Analyzing trace with hash 627043477, now seen corresponding path program 1 times [2021-11-25 17:50:52,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:52,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741091178] [2021-11-25 17:50:52,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:52,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:52,328 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:52,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741091178] [2021-11-25 17:50:52,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741091178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:52,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:52,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:50:52,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157855431] [2021-11-25 17:50:52,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:52,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:50:52,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:52,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:50:52,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:50:52,331 INFO L87 Difference]: Start difference. First operand 333 states and 416 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:52,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:52,431 INFO L93 Difference]: Finished difference Result 562 states and 724 transitions. [2021-11-25 17:50:52,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:50:52,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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 119 [2021-11-25 17:50:52,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:52,435 INFO L225 Difference]: With dead ends: 562 [2021-11-25 17:50:52,435 INFO L226 Difference]: Without dead ends: 418 [2021-11-25 17:50:52,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:50:52,437 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 57 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:52,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 322 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:50:52,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-25 17:50:52,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 400. [2021-11-25 17:50:52,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.255639097744361) internal successors, (501), 399 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 501 transitions. [2021-11-25 17:50:52,497 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 501 transitions. Word has length 119 [2021-11-25 17:50:52,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:52,498 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 501 transitions. [2021-11-25 17:50:52,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:52,498 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 501 transitions. [2021-11-25 17:50:52,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 17:50:52,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:52,500 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:50:52,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 17:50:52,500 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:52,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:52,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1282013094, now seen corresponding path program 1 times [2021-11-25 17:50:52,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:52,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296889481] [2021-11-25 17:50:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:52,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:52,573 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:52,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296889481] [2021-11-25 17:50:52,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296889481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:52,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:52,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:50:52,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957330404] [2021-11-25 17:50:52,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:52,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:50:52,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:52,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:50:52,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:50:52,577 INFO L87 Difference]: Start difference. First operand 400 states and 501 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:52,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:52,708 INFO L93 Difference]: Finished difference Result 766 states and 995 transitions. [2021-11-25 17:50:52,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:50:52,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 122 [2021-11-25 17:50:52,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:52,712 INFO L225 Difference]: With dead ends: 766 [2021-11-25 17:50:52,712 INFO L226 Difference]: Without dead ends: 571 [2021-11-25 17:50:52,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:50:52,714 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 52 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:52,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 316 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:50:52,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-25 17:50:52,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 549. [2021-11-25 17:50:52,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 1.281021897810219) internal successors, (702), 548 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:52,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 702 transitions. [2021-11-25 17:50:52,795 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 702 transitions. Word has length 122 [2021-11-25 17:50:52,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:52,796 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 702 transitions. [2021-11-25 17:50:52,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:52,796 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 702 transitions. [2021-11-25 17:50:52,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-25 17:50:52,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:52,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:50:52,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 17:50:52,798 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:52,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:52,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1993001682, now seen corresponding path program 1 times [2021-11-25 17:50:52,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:52,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414485247] [2021-11-25 17:50:52,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:52,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:52,870 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:52,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414485247] [2021-11-25 17:50:52,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414485247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:52,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:52,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:50:52,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735861537] [2021-11-25 17:50:52,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:52,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:50:52,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:52,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:50:52,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:50:52,872 INFO L87 Difference]: Start difference. First operand 549 states and 702 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:53,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:53,046 INFO L93 Difference]: Finished difference Result 1207 states and 1589 transitions. [2021-11-25 17:50:53,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:50:53,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 125 [2021-11-25 17:50:53,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:53,052 INFO L225 Difference]: With dead ends: 1207 [2021-11-25 17:50:53,052 INFO L226 Difference]: Without dead ends: 869 [2021-11-25 17:50:53,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:50:53,054 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 47 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:53,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 309 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:50:53,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-11-25 17:50:53,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 835. [2021-11-25 17:50:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 1.3009592326139088) internal successors, (1085), 834 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:53,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1085 transitions. [2021-11-25 17:50:53,179 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1085 transitions. Word has length 125 [2021-11-25 17:50:53,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:53,180 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 1085 transitions. [2021-11-25 17:50:53,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:53,180 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1085 transitions. [2021-11-25 17:50:53,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-25 17:50:53,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:53,183 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:50:53,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 17:50:53,184 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:53,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:53,184 INFO L85 PathProgramCache]: Analyzing trace with hash -378984628, now seen corresponding path program 1 times [2021-11-25 17:50:53,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:53,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839534604] [2021-11-25 17:50:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:53,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:53,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:53,269 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:53,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839534604] [2021-11-25 17:50:53,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839534604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:53,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:53,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:50:53,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882201101] [2021-11-25 17:50:53,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:53,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:50:53,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:53,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:50:53,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:50:53,272 INFO L87 Difference]: Start difference. First operand 835 states and 1085 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:53,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:53,522 INFO L93 Difference]: Finished difference Result 2059 states and 2732 transitions. [2021-11-25 17:50:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:50:53,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 128 [2021-11-25 17:50:53,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:53,531 INFO L225 Difference]: With dead ends: 2059 [2021-11-25 17:50:53,532 INFO L226 Difference]: Without dead ends: 1441 [2021-11-25 17:50:53,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:50:53,536 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 42 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:53,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 302 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:50:53,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-11-25 17:50:53,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1383. [2021-11-25 17:50:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 1.3140376266280753) internal successors, (1816), 1382 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:53,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 1816 transitions. [2021-11-25 17:50:53,742 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 1816 transitions. Word has length 128 [2021-11-25 17:50:53,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:53,742 INFO L470 AbstractCegarLoop]: Abstraction has 1383 states and 1816 transitions. [2021-11-25 17:50:53,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:53,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 1816 transitions. [2021-11-25 17:50:53,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-25 17:50:53,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:53,745 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:50:53,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 17:50:53,745 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:53,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:53,746 INFO L85 PathProgramCache]: Analyzing trace with hash 830726985, now seen corresponding path program 1 times [2021-11-25 17:50:53,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:53,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640073553] [2021-11-25 17:50:53,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:53,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:53,817 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:53,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640073553] [2021-11-25 17:50:53,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640073553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:53,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:53,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:50:53,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226847521] [2021-11-25 17:50:53,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:53,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:50:53,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:53,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:50:53,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:50:53,819 INFO L87 Difference]: Start difference. First operand 1383 states and 1816 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:54,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:54,264 INFO L93 Difference]: Finished difference Result 3697 states and 4919 transitions. [2021-11-25 17:50:54,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:50:54,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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 131 [2021-11-25 17:50:54,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:54,279 INFO L225 Difference]: With dead ends: 3697 [2021-11-25 17:50:54,279 INFO L226 Difference]: Without dead ends: 2537 [2021-11-25 17:50:54,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:50:54,281 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 37 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:54,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 295 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:50:54,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-11-25 17:50:54,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2431. [2021-11-25 17:50:54,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2431 states, 2430 states have (on average 1.319753086419753) internal successors, (3207), 2430 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2431 states to 2431 states and 3207 transitions. [2021-11-25 17:50:54,678 INFO L78 Accepts]: Start accepts. Automaton has 2431 states and 3207 transitions. Word has length 131 [2021-11-25 17:50:54,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:54,679 INFO L470 AbstractCegarLoop]: Abstraction has 2431 states and 3207 transitions. [2021-11-25 17:50:54,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:54,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2431 states and 3207 transitions. [2021-11-25 17:50:54,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-25 17:50:54,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:54,681 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:50:54,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 17:50:54,681 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:54,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:54,682 INFO L85 PathProgramCache]: Analyzing trace with hash -667416480, now seen corresponding path program 1 times [2021-11-25 17:50:54,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:54,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011691541] [2021-11-25 17:50:54,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:54,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:54,768 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:54,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011691541] [2021-11-25 17:50:54,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011691541] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:54,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:54,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:50:54,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284911900] [2021-11-25 17:50:54,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:54,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:50:54,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:54,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:50:54,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:50:54,771 INFO L87 Difference]: Start difference. First operand 2431 states and 3207 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:55,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:55,583 INFO L93 Difference]: Finished difference Result 6835 states and 9086 transitions. [2021-11-25 17:50:55,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:50:55,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 134 [2021-11-25 17:50:55,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:55,611 INFO L225 Difference]: With dead ends: 6835 [2021-11-25 17:50:55,611 INFO L226 Difference]: Without dead ends: 4633 [2021-11-25 17:50:55,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:50:55,618 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 32 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:55,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 288 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:50:55,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2021-11-25 17:50:56,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 4431. [2021-11-25 17:50:56,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4431 states, 4430 states have (on average 1.3196388261851015) internal successors, (5846), 4430 states have internal predecessors, (5846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:56,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4431 states to 4431 states and 5846 transitions. [2021-11-25 17:50:56,297 INFO L78 Accepts]: Start accepts. Automaton has 4431 states and 5846 transitions. Word has length 134 [2021-11-25 17:50:56,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:56,298 INFO L470 AbstractCegarLoop]: Abstraction has 4431 states and 5846 transitions. [2021-11-25 17:50:56,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:56,298 INFO L276 IsEmpty]: Start isEmpty. Operand 4431 states and 5846 transitions. [2021-11-25 17:50:56,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-25 17:50:56,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:56,300 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:50:56,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 17:50:56,301 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:56,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:56,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1405598606, now seen corresponding path program 1 times [2021-11-25 17:50:56,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:56,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168215437] [2021-11-25 17:50:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:56,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:56,377 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:56,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168215437] [2021-11-25 17:50:56,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168215437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:56,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:56,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:50:56,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066194687] [2021-11-25 17:50:56,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:56,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:50:56,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:56,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:50:56,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:50:56,380 INFO L87 Difference]: Start difference. First operand 4431 states and 5846 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:57,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:57,501 INFO L93 Difference]: Finished difference Result 12866 states and 17048 transitions. [2021-11-25 17:50:57,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:50:57,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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 137 [2021-11-25 17:50:57,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:57,543 INFO L225 Difference]: With dead ends: 12866 [2021-11-25 17:50:57,543 INFO L226 Difference]: Without dead ends: 8670 [2021-11-25 17:50:57,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:50:57,551 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 29 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:57,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 291 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:50:57,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8670 states. [2021-11-25 17:50:58,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8670 to 8276. [2021-11-25 17:50:58,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8276 states, 8275 states have (on average 1.3157703927492448) internal successors, (10888), 8275 states have internal predecessors, (10888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:58,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8276 states to 8276 states and 10888 transitions. [2021-11-25 17:50:58,763 INFO L78 Accepts]: Start accepts. Automaton has 8276 states and 10888 transitions. Word has length 137 [2021-11-25 17:50:58,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:58,764 INFO L470 AbstractCegarLoop]: Abstraction has 8276 states and 10888 transitions. [2021-11-25 17:50:58,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:58,764 INFO L276 IsEmpty]: Start isEmpty. Operand 8276 states and 10888 transitions. [2021-11-25 17:50:58,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-25 17:50:58,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:58,766 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:50:58,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 17:50:58,767 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:58,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:58,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1206463893, now seen corresponding path program 1 times [2021-11-25 17:50:58,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:58,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206987455] [2021-11-25 17:50:58,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:58,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 17:50:58,844 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:58,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206987455] [2021-11-25 17:50:58,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206987455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:58,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:58,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:50:58,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491184132] [2021-11-25 17:50:58,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:58,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:50:58,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:58,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:50:58,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:50:58,847 INFO L87 Difference]: Start difference. First operand 8276 states and 10888 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:00,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:00,072 INFO L93 Difference]: Finished difference Result 16276 states and 21444 transitions. [2021-11-25 17:51:00,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:51:00,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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 142 [2021-11-25 17:51:00,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:00,107 INFO L225 Difference]: With dead ends: 16276 [2021-11-25 17:51:00,107 INFO L226 Difference]: Without dead ends: 8098 [2021-11-25 17:51:00,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:51:00,120 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 60 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:00,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 332 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:51:00,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8098 states. [2021-11-25 17:51:00,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8098 to 7654. [2021-11-25 17:51:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7654 states, 7653 states have (on average 1.3009277407552593) internal successors, (9956), 7653 states have internal predecessors, (9956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:00,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7654 states to 7654 states and 9956 transitions. [2021-11-25 17:51:00,990 INFO L78 Accepts]: Start accepts. Automaton has 7654 states and 9956 transitions. Word has length 142 [2021-11-25 17:51:00,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:00,990 INFO L470 AbstractCegarLoop]: Abstraction has 7654 states and 9956 transitions. [2021-11-25 17:51:00,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:00,990 INFO L276 IsEmpty]: Start isEmpty. Operand 7654 states and 9956 transitions. [2021-11-25 17:51:00,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-25 17:51:00,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:00,992 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:00,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 17:51:00,993 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:00,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:00,994 INFO L85 PathProgramCache]: Analyzing trace with hash 293070734, now seen corresponding path program 1 times [2021-11-25 17:51:00,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:00,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632380438] [2021-11-25 17:51:00,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:00,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:55:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:55,995 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:55:55,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632380438] [2021-11-25 17:55:55,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632380438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:55:55,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601720241] [2021-11-25 17:55:55,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:55:55,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:55:55,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:55:55,997 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:55:56,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0003c2f6-9002-4ea8-88a0-d2d1d34717d4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 17:55:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:55:57,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 190 conjunts are in the unsatisfiable core [2021-11-25 17:55:57,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:02:00,560 WARN L227 SmtUtils]: Spent 7.09s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:02:48,615 WARN L227 SmtUtils]: Spent 6.52s on a formula simplification that was a NOOP. DAG size: 202 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)