./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660881d2-f9e5-424f-83b7-8fca92cd51d4/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660881d2-f9e5-424f-83b7-8fca92cd51d4/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660881d2-f9e5-424f-83b7-8fca92cd51d4/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660881d2-f9e5-424f-83b7-8fca92cd51d4/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660881d2-f9e5-424f-83b7-8fca92cd51d4/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660881d2-f9e5-424f-83b7-8fca92cd51d4/bin/utaipan-UbGMyvGFUs --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 9e29b1c17273501647988c2dcf7c62baca572c01c9f2bd474ce3ab9b8d1b7b68 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:31:57,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:31:57,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:31:57,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:31:57,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:31:57,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:31:57,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:31:57,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:31:57,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:31:57,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:31:57,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:31:57,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:31:57,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:31:57,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:31:57,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:31:57,181 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:31:57,182 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:31:57,184 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:31:57,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:31:57,189 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:31:57,191 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:31:57,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:31:57,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:31:57,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:31:57,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:31:57,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:31:57,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:31:57,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:31:57,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:31:57,218 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:31:57,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:31:57,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:31:57,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:31:57,224 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:31:57,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:31:57,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:31:57,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:31:57,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:31:57,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:31:57,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:31:57,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:31:57,232 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660881d2-f9e5-424f-83b7-8fca92cd51d4/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:31:57,276 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:31:57,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:31:57,278 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:31:57,278 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:31:57,279 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:31:57,279 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:31:57,279 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:31:57,280 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:31:57,280 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:31:57,280 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:31:57,280 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:31:57,281 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:31:57,281 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:31:57,281 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:31:57,282 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:31:57,282 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:31:57,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:31:57,283 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:31:57,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:31:57,284 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:31:57,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:31:57,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:31:57,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:31:57,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:31:57,285 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:31:57,286 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:31:57,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:31:57,303 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:31:57,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:31:57,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:31:57,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:31:57,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:31:57,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:31:57,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:31:57,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:31:57,306 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:31:57,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:31:57,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:31:57,307 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:31:57,307 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:31:57,307 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_660881d2-f9e5-424f-83b7-8fca92cd51d4/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660881d2-f9e5-424f-83b7-8fca92cd51d4/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e29b1c17273501647988c2dcf7c62baca572c01c9f2bd474ce3ab9b8d1b7b68 [2021-11-19 13:31:57,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:31:57,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:31:57,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:31:57,657 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:31:57,658 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:31:57,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660881d2-f9e5-424f-83b7-8fca92cd51d4/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-19 13:31:57,758 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660881d2-f9e5-424f-83b7-8fca92cd51d4/bin/utaipan-UbGMyvGFUs/data/f207ca717/d92676a3f80d4d029a6f3a3f81b77b2a/FLAG1bc25cbf6 [2021-11-19 13:31:58,433 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:31:58,439 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660881d2-f9e5-424f-83b7-8fca92cd51d4/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-19 13:31:58,462 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660881d2-f9e5-424f-83b7-8fca92cd51d4/bin/utaipan-UbGMyvGFUs/data/f207ca717/d92676a3f80d4d029a6f3a3f81b77b2a/FLAG1bc25cbf6 [2021-11-19 13:31:58,681 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660881d2-f9e5-424f-83b7-8fca92cd51d4/bin/utaipan-UbGMyvGFUs/data/f207ca717/d92676a3f80d4d029a6f3a3f81b77b2a [2021-11-19 13:31:58,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:31:58,686 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:31:58,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:31:58,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:31:58,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:31:58,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:31:58" (1/1) ... [2021-11-19 13:31:58,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@485e373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:31:58, skipping insertion in model container [2021-11-19 13:31:58,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:31:58" (1/1) ... [2021-11-19 13:31:58,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:31:58,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:31:59,175 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_660881d2-f9e5-424f-83b7-8fca92cd51d4/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13867,13880] [2021-11-19 13:31:59,274 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:31:59,292 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:31:59,576 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_660881d2-f9e5-424f-83b7-8fca92cd51d4/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13867,13880] [2021-11-19 13:31:59,698 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:31:59,721 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:31:59,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:31:59 WrapperNode [2021-11-19 13:31:59,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:31:59,723 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:31:59,723 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:31:59,723 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:31:59,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:31:59" (1/1) ... [2021-11-19 13:31:59,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:31:59" (1/1) ... [2021-11-19 13:31:59,848 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1373 [2021-11-19 13:31:59,849 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:31:59,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:31:59,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:31:59,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:31:59,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:31:59" (1/1) ... [2021-11-19 13:31:59,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:31:59" (1/1) ... [2021-11-19 13:31:59,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:31:59" (1/1) ... [2021-11-19 13:31:59,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:31:59" (1/1) ... [2021-11-19 13:31:59,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:31:59" (1/1) ... [2021-11-19 13:31:59,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:31:59" (1/1) ... [2021-11-19 13:31:59,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:31:59" (1/1) ... [2021-11-19 13:31:59,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:31:59,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:31:59,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:31:59,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:31:59,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:31:59" (1/1) ... [2021-11-19 13:31:59,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:31:59,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660881d2-f9e5-424f-83b7-8fca92cd51d4/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:32:00,021 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660881d2-f9e5-424f-83b7-8fca92cd51d4/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:32:00,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660881d2-f9e5-424f-83b7-8fca92cd51d4/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:32:00,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:32:00,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 13:32:00,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:32:00,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:32:00,270 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:32:00,273 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:32:01,548 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:32:01,970 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:32:01,970 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 13:32:01,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:32:01 BoogieIcfgContainer [2021-11-19 13:32:01,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:32:01,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:32:01,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:32:01,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:32:01,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:31:58" (1/3) ... [2021-11-19 13:32:01,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ace4c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:32:01, skipping insertion in model container [2021-11-19 13:32:01,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:31:59" (2/3) ... [2021-11-19 13:32:01,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ace4c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:32:01, skipping insertion in model container [2021-11-19 13:32:01,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:32:01" (3/3) ... [2021-11-19 13:32:01,990 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-19 13:32:02,001 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:32:02,001 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:32:02,062 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:32:02,072 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 [2021-11-19 13:32:02,072 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:32:02,101 INFO L276 IsEmpty]: Start isEmpty. Operand has 275 states, 273 states have (on average 1.6886446886446886) internal successors, (461), 274 states have internal predecessors, (461), 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) [2021-11-19 13:32:02,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-19 13:32:02,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:02,121 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:02,122 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:02,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:02,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1192275942, now seen corresponding path program 1 times [2021-11-19 13:32:02,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:32:02,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066406348] [2021-11-19 13:32:02,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:02,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:32:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:32:02,927 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:32:02,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066406348] [2021-11-19 13:32:02,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066406348] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:02,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:02,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:32:02,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558044494] [2021-11-19 13:32:02,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:02,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:32:02,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:32:02,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:32:02,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:32:02,999 INFO L87 Difference]: Start difference. First operand has 275 states, 273 states have (on average 1.6886446886446886) internal successors, (461), 274 states have internal predecessors, (461), 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 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2021-11-19 13:32:03,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:03,302 INFO L93 Difference]: Finished difference Result 469 states and 776 transitions. [2021-11-19 13:32:03,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:32:03,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 109 [2021-11-19 13:32:03,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:03,337 INFO L225 Difference]: With dead ends: 469 [2021-11-19 13:32:03,337 INFO L226 Difference]: Without dead ends: 358 [2021-11-19 13:32:03,343 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 [2021-11-19 13:32:03,348 INFO L933 BasicCegarLoop]: 560 mSDtfsCounter, 178 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:03,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 937 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:32:03,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-19 13:32:03,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 356. [2021-11-19 13:32:03,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.5464788732394366) internal successors, (549), 355 states have internal predecessors, (549), 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) [2021-11-19 13:32:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 549 transitions. [2021-11-19 13:32:03,439 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 549 transitions. Word has length 109 [2021-11-19 13:32:03,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:03,441 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 549 transitions. [2021-11-19 13:32:03,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2021-11-19 13:32:03,444 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 549 transitions. [2021-11-19 13:32:03,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 13:32:03,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:03,459 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:03,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 13:32:03,459 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:03,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:03,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1396174459, now seen corresponding path program 1 times [2021-11-19 13:32:03,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:32:03,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424468250] [2021-11-19 13:32:03,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:03,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:32:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:32:03,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:32:03,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424468250] [2021-11-19 13:32:03,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424468250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:03,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:03,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:32:03,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809751956] [2021-11-19 13:32:03,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:03,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:32:03,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:32:03,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:32:03,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:32:03,726 INFO L87 Difference]: Start difference. First operand 356 states and 549 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2021-11-19 13:32:03,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:03,958 INFO L93 Difference]: Finished difference Result 650 states and 1030 transitions. [2021-11-19 13:32:03,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:32:03,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 111 [2021-11-19 13:32:03,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:03,964 INFO L225 Difference]: With dead ends: 650 [2021-11-19 13:32:03,964 INFO L226 Difference]: Without dead ends: 462 [2021-11-19 13:32:03,966 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 [2021-11-19 13:32:03,968 INFO L933 BasicCegarLoop]: 378 mSDtfsCounter, 163 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:03,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 715 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:32:03,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-19 13:32:04,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2021-11-19 13:32:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.5599128540305012) internal successors, (716), 459 states have internal predecessors, (716), 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) [2021-11-19 13:32:04,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 716 transitions. [2021-11-19 13:32:04,051 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 716 transitions. Word has length 111 [2021-11-19 13:32:04,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:04,058 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 716 transitions. [2021-11-19 13:32:04,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2021-11-19 13:32:04,059 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 716 transitions. [2021-11-19 13:32:04,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 13:32:04,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:04,066 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:04,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 13:32:04,067 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:04,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:04,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1140322181, now seen corresponding path program 1 times [2021-11-19 13:32:04,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:32:04,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799893731] [2021-11-19 13:32:04,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:04,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:32:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:32:04,259 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:32:04,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799893731] [2021-11-19 13:32:04,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799893731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:04,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:04,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:32:04,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367457401] [2021-11-19 13:32:04,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:04,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:32:04,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:32:04,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:32:04,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:32:04,263 INFO L87 Difference]: Start difference. First operand 460 states and 716 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2021-11-19 13:32:04,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:04,437 INFO L93 Difference]: Finished difference Result 980 states and 1565 transitions. [2021-11-19 13:32:04,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:32:04,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 114 [2021-11-19 13:32:04,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:04,447 INFO L225 Difference]: With dead ends: 980 [2021-11-19 13:32:04,447 INFO L226 Difference]: Without dead ends: 690 [2021-11-19 13:32:04,453 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 [2021-11-19 13:32:04,463 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 162 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:04,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 813 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:32:04,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-11-19 13:32:04,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 688. [2021-11-19 13:32:04,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 1.5822416302765647) internal successors, (1087), 687 states have internal predecessors, (1087), 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) [2021-11-19 13:32:04,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 1087 transitions. [2021-11-19 13:32:04,520 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 1087 transitions. Word has length 114 [2021-11-19 13:32:04,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:04,525 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 1087 transitions. [2021-11-19 13:32:04,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2021-11-19 13:32:04,525 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 1087 transitions. [2021-11-19 13:32:04,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 13:32:04,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:04,539 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:04,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 13:32:04,540 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:04,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:04,541 INFO L85 PathProgramCache]: Analyzing trace with hash 159690739, now seen corresponding path program 1 times [2021-11-19 13:32:04,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:32:04,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108846989] [2021-11-19 13:32:04,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:04,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:32:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:32:04,748 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:32:04,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108846989] [2021-11-19 13:32:04,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108846989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:04,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:04,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:32:04,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024165343] [2021-11-19 13:32:04,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:04,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:32:04,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:32:04,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:32:04,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:32:04,751 INFO L87 Difference]: Start difference. First operand 688 states and 1087 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2021-11-19 13:32:04,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:04,928 INFO L93 Difference]: Finished difference Result 1518 states and 2440 transitions. [2021-11-19 13:32:04,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:32:04,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 116 [2021-11-19 13:32:04,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:04,938 INFO L225 Difference]: With dead ends: 1518 [2021-11-19 13:32:04,938 INFO L226 Difference]: Without dead ends: 1000 [2021-11-19 13:32:04,939 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 [2021-11-19 13:32:04,941 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 161 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:04,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 731 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:32:04,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-11-19 13:32:05,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 998. [2021-11-19 13:32:05,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 1.5957873620862588) internal successors, (1591), 997 states have internal predecessors, (1591), 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) [2021-11-19 13:32:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1591 transitions. [2021-11-19 13:32:05,019 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1591 transitions. Word has length 116 [2021-11-19 13:32:05,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:05,020 INFO L470 AbstractCegarLoop]: Abstraction has 998 states and 1591 transitions. [2021-11-19 13:32:05,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2021-11-19 13:32:05,021 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1591 transitions. [2021-11-19 13:32:05,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 13:32:05,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:05,023 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:05,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 13:32:05,024 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:05,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:05,026 INFO L85 PathProgramCache]: Analyzing trace with hash -810559734, now seen corresponding path program 1 times [2021-11-19 13:32:05,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:32:05,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822375901] [2021-11-19 13:32:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:05,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:32:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:32:05,183 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:32:05,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822375901] [2021-11-19 13:32:05,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822375901] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:05,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:05,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:32:05,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641684248] [2021-11-19 13:32:05,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:05,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:32:05,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:32:05,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:32:05,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:32:05,190 INFO L87 Difference]: Start difference. First operand 998 states and 1591 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) [2021-11-19 13:32:05,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:05,426 INFO L93 Difference]: Finished difference Result 2430 states and 3924 transitions. [2021-11-19 13:32:05,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:32:05,427 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 [2021-11-19 13:32:05,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:05,441 INFO L225 Difference]: With dead ends: 2430 [2021-11-19 13:32:05,442 INFO L226 Difference]: Without dead ends: 1624 [2021-11-19 13:32:05,444 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 [2021-11-19 13:32:05,448 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 155 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:05,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 779 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:32:05,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2021-11-19 13:32:05,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1622. [2021-11-19 13:32:05,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 1.6033312769895127) internal successors, (2599), 1621 states have internal predecessors, (2599), 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) [2021-11-19 13:32:05,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2599 transitions. [2021-11-19 13:32:05,617 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2599 transitions. Word has length 119 [2021-11-19 13:32:05,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:05,619 INFO L470 AbstractCegarLoop]: Abstraction has 1622 states and 2599 transitions. [2021-11-19 13:32:05,619 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) [2021-11-19 13:32:05,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2599 transitions. [2021-11-19 13:32:05,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 13:32:05,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:05,633 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:05,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 13:32:05,633 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:05,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:05,635 INFO L85 PathProgramCache]: Analyzing trace with hash -256638338, now seen corresponding path program 1 times [2021-11-19 13:32:05,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:32:05,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414936398] [2021-11-19 13:32:05,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:05,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:32:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:32:05,766 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:32:05,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414936398] [2021-11-19 13:32:05,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414936398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:05,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:05,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:32:05,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969432417] [2021-11-19 13:32:05,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:05,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:32:05,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:32:05,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:32:05,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:32:05,771 INFO L87 Difference]: Start difference. First operand 1622 states and 2599 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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) [2021-11-19 13:32:06,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:06,098 INFO L93 Difference]: Finished difference Result 3880 states and 6271 transitions. [2021-11-19 13:32:06,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:32:06,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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 121 [2021-11-19 13:32:06,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:06,118 INFO L225 Difference]: With dead ends: 3880 [2021-11-19 13:32:06,118 INFO L226 Difference]: Without dead ends: 2450 [2021-11-19 13:32:06,122 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 [2021-11-19 13:32:06,123 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 154 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:06,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 733 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:32:06,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2021-11-19 13:32:06,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 2448. [2021-11-19 13:32:06,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 1.6093175316714343) internal successors, (3938), 2447 states have internal predecessors, (3938), 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) [2021-11-19 13:32:06,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 3938 transitions. [2021-11-19 13:32:06,376 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 3938 transitions. Word has length 121 [2021-11-19 13:32:06,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:06,376 INFO L470 AbstractCegarLoop]: Abstraction has 2448 states and 3938 transitions. [2021-11-19 13:32:06,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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) [2021-11-19 13:32:06,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 3938 transitions. [2021-11-19 13:32:06,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 13:32:06,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:06,379 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:06,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 13:32:06,380 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:06,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:06,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1650306276, now seen corresponding path program 1 times [2021-11-19 13:32:06,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:32:06,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231320872] [2021-11-19 13:32:06,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:06,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:32:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:06,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:32:06,485 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:32:06,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231320872] [2021-11-19 13:32:06,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231320872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:06,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:06,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:32:06,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724603857] [2021-11-19 13:32:06,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:06,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:32:06,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:32:06,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:32:06,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:32:06,489 INFO L87 Difference]: Start difference. First operand 2448 states and 3938 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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) [2021-11-19 13:32:06,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:06,927 INFO L93 Difference]: Finished difference Result 6376 states and 10303 transitions. [2021-11-19 13:32:06,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:32:06,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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 124 [2021-11-19 13:32:06,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:06,957 INFO L225 Difference]: With dead ends: 6376 [2021-11-19 13:32:06,957 INFO L226 Difference]: Without dead ends: 4142 [2021-11-19 13:32:06,965 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 [2021-11-19 13:32:06,970 INFO L933 BasicCegarLoop]: 403 mSDtfsCounter, 148 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:06,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 745 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:32:06,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4142 states. [2021-11-19 13:32:07,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4142 to 4140. [2021-11-19 13:32:07,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4140 states, 4139 states have (on average 1.605943464604977) internal successors, (6647), 4139 states have internal predecessors, (6647), 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) [2021-11-19 13:32:07,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4140 states to 4140 states and 6647 transitions. [2021-11-19 13:32:07,339 INFO L78 Accepts]: Start accepts. Automaton has 4140 states and 6647 transitions. Word has length 124 [2021-11-19 13:32:07,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:07,339 INFO L470 AbstractCegarLoop]: Abstraction has 4140 states and 6647 transitions. [2021-11-19 13:32:07,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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) [2021-11-19 13:32:07,340 INFO L276 IsEmpty]: Start isEmpty. Operand 4140 states and 6647 transitions. [2021-11-19 13:32:07,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 13:32:07,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:07,343 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:07,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 13:32:07,343 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:07,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:07,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1667165107, now seen corresponding path program 1 times [2021-11-19 13:32:07,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:32:07,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951903641] [2021-11-19 13:32:07,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:07,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:32:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:32:07,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:32:07,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951903641] [2021-11-19 13:32:07,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951903641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:07,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:07,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:32:07,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267651497] [2021-11-19 13:32:07,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:07,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:32:07,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:32:07,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:32:07,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:32:07,467 INFO L87 Difference]: Start difference. First operand 4140 states and 6647 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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) [2021-11-19 13:32:08,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:08,101 INFO L93 Difference]: Finished difference Result 10322 states and 16646 transitions. [2021-11-19 13:32:08,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:32:08,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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 126 [2021-11-19 13:32:08,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:08,144 INFO L225 Difference]: With dead ends: 10322 [2021-11-19 13:32:08,145 INFO L226 Difference]: Without dead ends: 6396 [2021-11-19 13:32:08,151 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 [2021-11-19 13:32:08,153 INFO L933 BasicCegarLoop]: 389 mSDtfsCounter, 147 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:08,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 735 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:32:08,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6396 states. [2021-11-19 13:32:08,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6396 to 6394. [2021-11-19 13:32:08,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6394 states, 6393 states have (on average 1.6081651806663537) internal successors, (10281), 6393 states have internal predecessors, (10281), 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) [2021-11-19 13:32:08,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6394 states to 6394 states and 10281 transitions. [2021-11-19 13:32:08,657 INFO L78 Accepts]: Start accepts. Automaton has 6394 states and 10281 transitions. Word has length 126 [2021-11-19 13:32:08,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:08,659 INFO L470 AbstractCegarLoop]: Abstraction has 6394 states and 10281 transitions. [2021-11-19 13:32:08,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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) [2021-11-19 13:32:08,660 INFO L276 IsEmpty]: Start isEmpty. Operand 6394 states and 10281 transitions. [2021-11-19 13:32:08,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 13:32:08,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:08,662 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:08,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 13:32:08,663 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:08,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:08,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2123898576, now seen corresponding path program 1 times [2021-11-19 13:32:08,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:32:08,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908021507] [2021-11-19 13:32:08,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:08,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:32:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:32:08,777 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:32:08,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908021507] [2021-11-19 13:32:08,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908021507] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:08,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:08,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 13:32:08,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721163067] [2021-11-19 13:32:08,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:08,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:32:08,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:32:08,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:32:08,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:32:08,781 INFO L87 Difference]: Start difference. First operand 6394 states and 10281 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 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) [2021-11-19 13:32:10,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:10,036 INFO L93 Difference]: Finished difference Result 16018 states and 25774 transitions. [2021-11-19 13:32:10,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:32:10,037 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 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 129 [2021-11-19 13:32:10,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:10,123 INFO L225 Difference]: With dead ends: 16018 [2021-11-19 13:32:10,124 INFO L226 Difference]: Without dead ends: 9860 [2021-11-19 13:32:10,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:32:10,142 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 1268 mSDsluCounter, 3311 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 3585 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:10,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1268 Valid, 3585 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:32:10,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9860 states. [2021-11-19 13:32:10,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9860 to 9846. [2021-11-19 13:32:10,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9846 states, 9845 states have (on average 1.600812595226003) internal successors, (15760), 9845 states have internal predecessors, (15760), 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) [2021-11-19 13:32:11,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9846 states to 9846 states and 15760 transitions. [2021-11-19 13:32:11,009 INFO L78 Accepts]: Start accepts. Automaton has 9846 states and 15760 transitions. Word has length 129 [2021-11-19 13:32:11,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:11,010 INFO L470 AbstractCegarLoop]: Abstraction has 9846 states and 15760 transitions. [2021-11-19 13:32:11,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 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) [2021-11-19 13:32:11,011 INFO L276 IsEmpty]: Start isEmpty. Operand 9846 states and 15760 transitions. [2021-11-19 13:32:11,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 13:32:11,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:11,014 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:11,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 13:32:11,014 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:11,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:11,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1483408406, now seen corresponding path program 1 times [2021-11-19 13:32:11,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:32:11,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940030931] [2021-11-19 13:32:11,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:11,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:32:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:32:11,110 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:32:11,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940030931] [2021-11-19 13:32:11,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940030931] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:11,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:11,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:32:11,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60867653] [2021-11-19 13:32:11,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:11,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:32:11,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:32:11,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:32:11,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:32:11,114 INFO L87 Difference]: Start difference. First operand 9846 states and 15760 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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) [2021-11-19 13:32:11,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:11,966 INFO L93 Difference]: Finished difference Result 19458 states and 31177 transitions. [2021-11-19 13:32:11,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:32:11,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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 130 [2021-11-19 13:32:11,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:12,004 INFO L225 Difference]: With dead ends: 19458 [2021-11-19 13:32:12,005 INFO L226 Difference]: Without dead ends: 9848 [2021-11-19 13:32:12,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:32:12,027 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 311 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:12,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 1094 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:32:12,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2021-11-19 13:32:12,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 9846. [2021-11-19 13:32:12,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9846 states, 9845 states have (on average 1.5973590655154901) internal successors, (15726), 9845 states have internal predecessors, (15726), 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) [2021-11-19 13:32:12,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9846 states to 9846 states and 15726 transitions. [2021-11-19 13:32:12,802 INFO L78 Accepts]: Start accepts. Automaton has 9846 states and 15726 transitions. Word has length 130 [2021-11-19 13:32:12,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:12,802 INFO L470 AbstractCegarLoop]: Abstraction has 9846 states and 15726 transitions. [2021-11-19 13:32:12,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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) [2021-11-19 13:32:12,803 INFO L276 IsEmpty]: Start isEmpty. Operand 9846 states and 15726 transitions. [2021-11-19 13:32:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 13:32:12,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:12,806 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:12,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 13:32:12,807 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:12,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:12,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1196475703, now seen corresponding path program 1 times [2021-11-19 13:32:12,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:32:12,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640842706] [2021-11-19 13:32:12,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:12,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:32:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:12,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:32:12,907 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:32:12,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640842706] [2021-11-19 13:32:12,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640842706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:12,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:12,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:32:12,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209904434] [2021-11-19 13:32:12,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:12,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:32:12,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:32:12,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:32:12,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:32:12,911 INFO L87 Difference]: Start difference. First operand 9846 states and 15726 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 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) [2021-11-19 13:32:13,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:13,816 INFO L93 Difference]: Finished difference Result 19458 states and 31109 transitions. [2021-11-19 13:32:13,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:32:13,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 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 [2021-11-19 13:32:13,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:13,854 INFO L225 Difference]: With dead ends: 19458 [2021-11-19 13:32:13,855 INFO L226 Difference]: Without dead ends: 9848 [2021-11-19 13:32:13,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:32:13,875 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 319 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:13,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 1100 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:32:13,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2021-11-19 13:32:14,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 9846. [2021-11-19 13:32:14,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9846 states, 9845 states have (on average 1.5939055358049772) internal successors, (15692), 9845 states have internal predecessors, (15692), 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) [2021-11-19 13:32:14,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9846 states to 9846 states and 15692 transitions. [2021-11-19 13:32:14,638 INFO L78 Accepts]: Start accepts. Automaton has 9846 states and 15692 transitions. Word has length 131 [2021-11-19 13:32:14,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:14,639 INFO L470 AbstractCegarLoop]: Abstraction has 9846 states and 15692 transitions. [2021-11-19 13:32:14,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 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) [2021-11-19 13:32:14,640 INFO L276 IsEmpty]: Start isEmpty. Operand 9846 states and 15692 transitions. [2021-11-19 13:32:14,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 13:32:14,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:14,642 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:14,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 13:32:14,643 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:14,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1621904815, now seen corresponding path program 1 times [2021-11-19 13:32:14,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:32:14,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136305167] [2021-11-19 13:32:14,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:14,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:32:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:32:14,734 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:32:14,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136305167] [2021-11-19 13:32:14,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136305167] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:14,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:14,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:32:14,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390503649] [2021-11-19 13:32:14,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:14,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:32:14,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:32:14,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:32:14,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:32:14,737 INFO L87 Difference]: Start difference. First operand 9846 states and 15692 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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) [2021-11-19 13:32:15,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:15,602 INFO L93 Difference]: Finished difference Result 19458 states and 31041 transitions. [2021-11-19 13:32:15,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:32:15,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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 132 [2021-11-19 13:32:15,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:15,634 INFO L225 Difference]: With dead ends: 19458 [2021-11-19 13:32:15,634 INFO L226 Difference]: Without dead ends: 9848 [2021-11-19 13:32:15,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:32:15,651 INFO L933 BasicCegarLoop]: 384 mSDtfsCounter, 317 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:15,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 1103 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:32:15,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2021-11-19 13:32:16,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 9846. [2021-11-19 13:32:16,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9846 states, 9845 states have (on average 1.5904520060944642) internal successors, (15658), 9845 states have internal predecessors, (15658), 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) [2021-11-19 13:32:16,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9846 states to 9846 states and 15658 transitions. [2021-11-19 13:32:16,257 INFO L78 Accepts]: Start accepts. Automaton has 9846 states and 15658 transitions. Word has length 132 [2021-11-19 13:32:16,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:16,258 INFO L470 AbstractCegarLoop]: Abstraction has 9846 states and 15658 transitions. [2021-11-19 13:32:16,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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) [2021-11-19 13:32:16,259 INFO L276 IsEmpty]: Start isEmpty. Operand 9846 states and 15658 transitions. [2021-11-19 13:32:16,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 13:32:16,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:16,261 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:16,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 13:32:16,262 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:16,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:16,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1207170366, now seen corresponding path program 1 times [2021-11-19 13:32:16,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:32:16,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596536046] [2021-11-19 13:32:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:16,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:32:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:32:16,353 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:32:16,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596536046] [2021-11-19 13:32:16,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596536046] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:16,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:16,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:32:16,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029717399] [2021-11-19 13:32:16,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:16,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:32:16,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:32:16,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:32:16,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:32:16,356 INFO L87 Difference]: Start difference. First operand 9846 states and 15658 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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) [2021-11-19 13:32:17,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:17,108 INFO L93 Difference]: Finished difference Result 19458 states and 30973 transitions. [2021-11-19 13:32:17,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:32:17,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 133 [2021-11-19 13:32:17,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:17,139 INFO L225 Difference]: With dead ends: 19458 [2021-11-19 13:32:17,140 INFO L226 Difference]: Without dead ends: 9848 [2021-11-19 13:32:17,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:32:17,159 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 315 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:17,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1106 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:32:17,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2021-11-19 13:32:17,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 9846. [2021-11-19 13:32:17,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9846 states, 9845 states have (on average 1.5869984763839513) internal successors, (15624), 9845 states have internal predecessors, (15624), 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) [2021-11-19 13:32:17,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9846 states to 9846 states and 15624 transitions. [2021-11-19 13:32:17,770 INFO L78 Accepts]: Start accepts. Automaton has 9846 states and 15624 transitions. Word has length 133 [2021-11-19 13:32:17,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:17,771 INFO L470 AbstractCegarLoop]: Abstraction has 9846 states and 15624 transitions. [2021-11-19 13:32:17,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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) [2021-11-19 13:32:17,771 INFO L276 IsEmpty]: Start isEmpty. Operand 9846 states and 15624 transitions. [2021-11-19 13:32:17,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-19 13:32:17,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:17,774 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:17,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 13:32:17,775 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:17,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:17,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1067752401, now seen corresponding path program 1 times [2021-11-19 13:32:17,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:32:17,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547286730] [2021-11-19 13:32:17,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:17,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:32:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:32:18,022 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:32:18,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547286730] [2021-11-19 13:32:18,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547286730] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:18,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:18,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 13:32:18,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843792794] [2021-11-19 13:32:18,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:18,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:32:18,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:32:18,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:32:18,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:32:18,026 INFO L87 Difference]: Start difference. First operand 9846 states and 15624 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 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) [2021-11-19 13:32:19,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:19,235 INFO L93 Difference]: Finished difference Result 19458 states and 30905 transitions. [2021-11-19 13:32:19,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:32:19,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 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 135 [2021-11-19 13:32:19,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:19,271 INFO L225 Difference]: With dead ends: 19458 [2021-11-19 13:32:19,271 INFO L226 Difference]: Without dead ends: 9848 [2021-11-19 13:32:19,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:32:19,293 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 410 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:19,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 1433 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:32:19,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2021-11-19 13:32:20,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 9846. [2021-11-19 13:32:20,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9846 states, 9845 states have (on average 1.5853732859319452) internal successors, (15608), 9845 states have internal predecessors, (15608), 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) [2021-11-19 13:32:20,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9846 states to 9846 states and 15608 transitions. [2021-11-19 13:32:20,157 INFO L78 Accepts]: Start accepts. Automaton has 9846 states and 15608 transitions. Word has length 135 [2021-11-19 13:32:20,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:20,158 INFO L470 AbstractCegarLoop]: Abstraction has 9846 states and 15608 transitions. [2021-11-19 13:32:20,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 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) [2021-11-19 13:32:20,158 INFO L276 IsEmpty]: Start isEmpty. Operand 9846 states and 15608 transitions. [2021-11-19 13:32:20,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-19 13:32:20,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:20,160 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:20,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 13:32:20,161 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:20,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:20,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1362654499, now seen corresponding path program 1 times [2021-11-19 13:32:20,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:32:20,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73051430] [2021-11-19 13:32:20,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:20,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:32:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:32:20,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:32:20,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73051430] [2021-11-19 13:32:20,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73051430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:20,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:20,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 13:32:20,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805165352] [2021-11-19 13:32:20,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:20,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:32:20,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:32:20,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:32:20,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:32:20,399 INFO L87 Difference]: Start difference. First operand 9846 states and 15608 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 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) [2021-11-19 13:32:21,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:21,516 INFO L93 Difference]: Finished difference Result 24527 states and 38817 transitions. [2021-11-19 13:32:21,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:32:21,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 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 138 [2021-11-19 13:32:21,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:21,571 INFO L225 Difference]: With dead ends: 24527 [2021-11-19 13:32:21,571 INFO L226 Difference]: Without dead ends: 14917 [2021-11-19 13:32:21,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:32:21,590 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 405 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:21,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 1462 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:32:21,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14917 states. [2021-11-19 13:32:22,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14917 to 14915. [2021-11-19 13:32:22,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14915 states, 14914 states have (on average 1.5775781145232668) internal successors, (23528), 14914 states have internal predecessors, (23528), 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) [2021-11-19 13:32:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14915 states to 14915 states and 23528 transitions. [2021-11-19 13:32:22,724 INFO L78 Accepts]: Start accepts. Automaton has 14915 states and 23528 transitions. Word has length 138 [2021-11-19 13:32:22,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:22,724 INFO L470 AbstractCegarLoop]: Abstraction has 14915 states and 23528 transitions. [2021-11-19 13:32:22,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 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) [2021-11-19 13:32:22,725 INFO L276 IsEmpty]: Start isEmpty. Operand 14915 states and 23528 transitions. [2021-11-19 13:32:22,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 13:32:22,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:22,727 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:22,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 13:32:22,727 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:22,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:22,728 INFO L85 PathProgramCache]: Analyzing trace with hash -671994232, now seen corresponding path program 1 times [2021-11-19 13:32:22,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:32:22,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973799766] [2021-11-19 13:32:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:22,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:32:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:32:22,971 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:32:22,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973799766] [2021-11-19 13:32:22,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973799766] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:22,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:22,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 13:32:22,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78605879] [2021-11-19 13:32:22,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:22,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:32:22,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:32:22,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:32:22,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:32:22,974 INFO L87 Difference]: Start difference. First operand 14915 states and 23528 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 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) [2021-11-19 13:32:24,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:24,388 INFO L93 Difference]: Finished difference Result 18223 states and 28636 transitions. [2021-11-19 13:32:24,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:32:24,389 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 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 139 [2021-11-19 13:32:24,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:24,423 INFO L225 Difference]: With dead ends: 18223 [2021-11-19 13:32:24,423 INFO L226 Difference]: Without dead ends: 18221 [2021-11-19 13:32:24,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:32:24,430 INFO L933 BasicCegarLoop]: 650 mSDtfsCounter, 449 mSDsluCounter, 1539 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 2099 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:24,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 2099 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:32:24,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18221 states. [2021-11-19 13:32:25,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18221 to 14929. [2021-11-19 13:32:25,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14929 states, 14928 states have (on average 1.5756966773847803) internal successors, (23522), 14928 states have internal predecessors, (23522), 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) [2021-11-19 13:32:25,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14929 states to 14929 states and 23522 transitions. [2021-11-19 13:32:25,681 INFO L78 Accepts]: Start accepts. Automaton has 14929 states and 23522 transitions. Word has length 139 [2021-11-19 13:32:25,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:25,682 INFO L470 AbstractCegarLoop]: Abstraction has 14929 states and 23522 transitions. [2021-11-19 13:32:25,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 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) [2021-11-19 13:32:25,683 INFO L276 IsEmpty]: Start isEmpty. Operand 14929 states and 23522 transitions. [2021-11-19 13:32:25,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 13:32:25,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:25,685 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:25,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 13:32:25,685 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:25,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:25,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1213203238, now seen corresponding path program 1 times [2021-11-19 13:32:25,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:32:25,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979240797] [2021-11-19 13:32:25,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:25,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:32:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 13:32:26,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:32:26,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979240797] [2021-11-19 13:32:26,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979240797] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 13:32:26,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860801320] [2021-11-19 13:32:26,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:26,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:32:26,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660881d2-f9e5-424f-83b7-8fca92cd51d4/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:32:26,689 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660881d2-f9e5-424f-83b7-8fca92cd51d4/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:32:26,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660881d2-f9e5-424f-83b7-8fca92cd51d4/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 13:32:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:26,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:32:26,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:32:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 13:32:27,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:32:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 13:32:28,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860801320] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:28,396 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:32:28,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [13] total 16 [2021-11-19 13:32:28,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493390993] [2021-11-19 13:32:28,397 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:28,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:32:28,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:32:28,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:32:28,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:32:28,400 INFO L87 Difference]: Start difference. First operand 14929 states and 23522 transitions. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 4 states have internal predecessors, (166), 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) [2021-11-19 13:32:30,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:30,797 INFO L93 Difference]: Finished difference Result 43944 states and 69249 transitions. [2021-11-19 13:32:30,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:32:30,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 4 states have internal predecessors, (166), 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 151 [2021-11-19 13:32:30,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:30,855 INFO L225 Difference]: With dead ends: 43944 [2021-11-19 13:32:30,855 INFO L226 Difference]: Without dead ends: 29248 [2021-11-19 13:32:30,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-19 13:32:30,874 INFO L933 BasicCegarLoop]: 378 mSDtfsCounter, 1694 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1694 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:30,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1694 Valid, 748 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:32:30,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29248 states. [2021-11-19 13:32:33,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29248 to 29246. [2021-11-19 13:32:33,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29246 states, 29245 states have (on average 1.571345529150282) internal successors, (45954), 29245 states have internal predecessors, (45954), 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) [2021-11-19 13:32:33,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29246 states to 29246 states and 45954 transitions. [2021-11-19 13:32:33,080 INFO L78 Accepts]: Start accepts. Automaton has 29246 states and 45954 transitions. Word has length 151 [2021-11-19 13:32:33,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:33,081 INFO L470 AbstractCegarLoop]: Abstraction has 29246 states and 45954 transitions. [2021-11-19 13:32:33,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 4 states have internal predecessors, (166), 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) [2021-11-19 13:32:33,081 INFO L276 IsEmpty]: Start isEmpty. Operand 29246 states and 45954 transitions. [2021-11-19 13:32:33,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-19 13:32:33,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:33,084 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:33,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660881d2-f9e5-424f-83b7-8fca92cd51d4/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-19 13:32:33,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660881d2-f9e5-424f-83b7-8fca92cd51d4/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:32:33,286 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:33,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:33,287 INFO L85 PathProgramCache]: Analyzing trace with hash -861627005, now seen corresponding path program 1 times [2021-11-19 13:32:33,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:32:33,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422476554] [2021-11-19 13:32:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:33,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:32:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 13:32:33,398 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:32:33,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422476554] [2021-11-19 13:32:33,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422476554] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:33,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:33,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:32:33,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946738490] [2021-11-19 13:32:33,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:33,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:32:33,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:32:33,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:32:33,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:32:33,401 INFO L87 Difference]: Start difference. First operand 29246 states and 45954 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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) [2021-11-19 13:32:36,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:36,079 INFO L93 Difference]: Finished difference Result 67808 states and 106828 transitions. [2021-11-19 13:32:36,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:32:36,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 152 [2021-11-19 13:32:36,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:36,161 INFO L225 Difference]: With dead ends: 67808 [2021-11-19 13:32:36,161 INFO L226 Difference]: Without dead ends: 38959 [2021-11-19 13:32:36,195 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 [2021-11-19 13:32:36,196 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 148 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:36,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 752 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:32:36,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38959 states. [2021-11-19 13:32:38,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38959 to 38957. [2021-11-19 13:32:38,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38957 states, 38956 states have (on average 1.5627374473765274) internal successors, (60878), 38956 states have internal predecessors, (60878), 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) [2021-11-19 13:32:38,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38957 states to 38957 states and 60878 transitions. [2021-11-19 13:32:38,888 INFO L78 Accepts]: Start accepts. Automaton has 38957 states and 60878 transitions. Word has length 152 [2021-11-19 13:32:38,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:38,888 INFO L470 AbstractCegarLoop]: Abstraction has 38957 states and 60878 transitions. [2021-11-19 13:32:38,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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) [2021-11-19 13:32:38,889 INFO L276 IsEmpty]: Start isEmpty. Operand 38957 states and 60878 transitions. [2021-11-19 13:32:38,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-19 13:32:38,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:38,892 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:38,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 13:32:38,893 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:38,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:38,894 INFO L85 PathProgramCache]: Analyzing trace with hash 2146895564, now seen corresponding path program 1 times [2021-11-19 13:32:38,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:32:38,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200172396] [2021-11-19 13:32:38,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:38,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:32:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 13:32:38,977 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:32:38,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200172396] [2021-11-19 13:32:38,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200172396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:38,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:38,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:32:38,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395770672] [2021-11-19 13:32:38,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:38,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:32:38,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:32:38,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:32:38,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:32:38,980 INFO L87 Difference]: Start difference. First operand 38957 states and 60878 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 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) [2021-11-19 13:32:44,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:44,584 INFO L93 Difference]: Finished difference Result 114243 states and 178428 transitions. [2021-11-19 13:32:44,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:32:44,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 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 153 [2021-11-19 13:32:44,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:44,761 INFO L225 Difference]: With dead ends: 114243 [2021-11-19 13:32:44,762 INFO L226 Difference]: Without dead ends: 75374 [2021-11-19 13:32:44,810 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 [2021-11-19 13:32:44,811 INFO L933 BasicCegarLoop]: 707 mSDtfsCounter, 273 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:44,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 1071 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:32:44,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75374 states. [2021-11-19 13:32:50,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75374 to 75372. [2021-11-19 13:32:50,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75372 states, 75371 states have (on average 1.5547624417879555) internal successors, (117184), 75371 states have internal predecessors, (117184), 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) [2021-11-19 13:32:50,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75372 states to 75372 states and 117184 transitions. [2021-11-19 13:32:50,562 INFO L78 Accepts]: Start accepts. Automaton has 75372 states and 117184 transitions. Word has length 153 [2021-11-19 13:32:50,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:50,562 INFO L470 AbstractCegarLoop]: Abstraction has 75372 states and 117184 transitions. [2021-11-19 13:32:50,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 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) [2021-11-19 13:32:50,562 INFO L276 IsEmpty]: Start isEmpty. Operand 75372 states and 117184 transitions. [2021-11-19 13:32:50,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-19 13:32:50,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:50,567 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:50,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-19 13:32:50,568 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:50,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:50,568 INFO L85 PathProgramCache]: Analyzing trace with hash 487033294, now seen corresponding path program 1 times [2021-11-19 13:32:50,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:32:50,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153716267] [2021-11-19 13:32:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:50,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:32:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:32:50,615 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:32:50,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153716267] [2021-11-19 13:32:50,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153716267] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:50,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:50,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:32:50,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609086288] [2021-11-19 13:32:50,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:50,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:32:50,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:32:50,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:32:50,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:32:50,618 INFO L87 Difference]: Start difference. First operand 75372 states and 117184 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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)