./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P --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 ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:43:07,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:43:07,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:43:07,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:43:07,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:43:07,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:43:07,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:43:07,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:43:07,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:43:07,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:43:07,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:43:07,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:43:07,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:43:07,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:43:07,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:43:07,143 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:43:07,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:43:07,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:43:07,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:43:07,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:43:07,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:43:07,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:43:07,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:43:07,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:43:07,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:43:07,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:43:07,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:43:07,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:43:07,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:43:07,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:43:07,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:43:07,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:43:07,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:43:07,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:43:07,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:43:07,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:43:07,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:43:07,193 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:43:07,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:43:07,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:43:07,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:43:07,196 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:43:07,242 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:43:07,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:43:07,243 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:43:07,244 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:43:07,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:43:07,251 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:43:07,251 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:43:07,252 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:43:07,252 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:43:07,252 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:43:07,253 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:43:07,253 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:43:07,254 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:43:07,254 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:43:07,254 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:43:07,254 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:43:07,255 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:43:07,255 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:43:07,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:43:07,256 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:43:07,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:43:07,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:43:07,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:43:07,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:43:07,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:43:07,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:43:07,259 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:43:07,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:43:07,259 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:43:07,260 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:43:07,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:43:07,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:43:07,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:43:07,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:43:07,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:43:07,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:43:07,262 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:43:07,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:43:07,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:43:07,262 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:43:07,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:43:07,263 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_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e [2021-11-21 00:43:07,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:43:07,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:43:07,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:43:07,538 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:43:07,539 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:43:07,540 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-11-21 00:43:07,631 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/data/dbb4eab7a/34d23f8aa4454703b8e38defc3e48708/FLAGba9e54389 [2021-11-21 00:43:08,254 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:43:08,257 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-11-21 00:43:08,301 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/data/dbb4eab7a/34d23f8aa4454703b8e38defc3e48708/FLAGba9e54389 [2021-11-21 00:43:08,500 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/data/dbb4eab7a/34d23f8aa4454703b8e38defc3e48708 [2021-11-21 00:43:08,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:43:08,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:43:08,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:43:08,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:43:08,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:43:08,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:43:08" (1/1) ... [2021-11-21 00:43:08,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75aadd61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:08, skipping insertion in model container [2021-11-21 00:43:08,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:43:08" (1/1) ... [2021-11-21 00:43:08,530 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:43:08,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:43:09,042 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_d449ca9e-aa08-4398-91af-41425d573fc7/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-11-21 00:43:09,057 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:43:09,070 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:43:09,188 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_d449ca9e-aa08-4398-91af-41425d573fc7/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-11-21 00:43:09,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:43:09,218 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:43:09,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:09 WrapperNode [2021-11-21 00:43:09,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:43:09,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:43:09,220 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:43:09,220 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:43:09,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:09" (1/1) ... [2021-11-21 00:43:09,264 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:09" (1/1) ... [2021-11-21 00:43:09,317 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 782 [2021-11-21 00:43:09,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:43:09,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:43:09,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:43:09,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:43:09,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:09" (1/1) ... [2021-11-21 00:43:09,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:09" (1/1) ... [2021-11-21 00:43:09,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:09" (1/1) ... [2021-11-21 00:43:09,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:09" (1/1) ... [2021-11-21 00:43:09,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:09" (1/1) ... [2021-11-21 00:43:09,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:09" (1/1) ... [2021-11-21 00:43:09,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:09" (1/1) ... [2021-11-21 00:43:09,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:43:09,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:43:09,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:43:09,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:43:09,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:09" (1/1) ... [2021-11-21 00:43:09,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:43:09,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:09,468 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:43:09,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:43:09,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:43:09,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:43:09,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:43:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:43:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:43:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:43:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:43:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:43:09,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:43:09,662 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:43:09,664 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:43:09,684 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-21 00:43:12,697 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-21 00:43:12,698 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-21 00:43:12,698 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:43:13,015 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:43:13,015 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:43:13,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:43:13 BoogieIcfgContainer [2021-11-21 00:43:13,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:43:13,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:43:13,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:43:13,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:43:13,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:43:08" (1/3) ... [2021-11-21 00:43:13,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f64672d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:43:13, skipping insertion in model container [2021-11-21 00:43:13,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:43:09" (2/3) ... [2021-11-21 00:43:13,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f64672d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:43:13, skipping insertion in model container [2021-11-21 00:43:13,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:43:13" (3/3) ... [2021-11-21 00:43:13,027 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.02.i.cil-2.c [2021-11-21 00:43:13,032 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:43:13,033 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:43:13,083 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:43:13,091 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 [2021-11-21 00:43:13,091 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:43:13,109 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 106 states have (on average 1.7547169811320755) internal successors, (186), 107 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:13,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 00:43:13,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:13,119 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] [2021-11-21 00:43:13,119 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:13,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:13,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1789770799, now seen corresponding path program 1 times [2021-11-21 00:43:13,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:13,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366388937] [2021-11-21 00:43:13,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:13,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:13,570 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:13,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366388937] [2021-11-21 00:43:13,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366388937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:13,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:13,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:43:13,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916611125] [2021-11-21 00:43:13,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:13,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:13,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:13,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:13,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:13,610 INFO L87 Difference]: Start difference. First operand has 108 states, 106 states have (on average 1.7547169811320755) internal successors, (186), 107 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:15,637 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:43:16,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:16,168 INFO L93 Difference]: Finished difference Result 239 states and 412 transitions. [2021-11-21 00:43:16,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:16,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-11-21 00:43:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:16,187 INFO L225 Difference]: With dead ends: 239 [2021-11-21 00:43:16,188 INFO L226 Difference]: Without dead ends: 127 [2021-11-21 00:43:16,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:43:16,196 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 20 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:16,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 396 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 151 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-21 00:43:16,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-21 00:43:16,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2021-11-21 00:43:16,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.5350877192982457) internal successors, (175), 114 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:16,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 175 transitions. [2021-11-21 00:43:16,268 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 175 transitions. Word has length 39 [2021-11-21 00:43:16,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:16,269 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 175 transitions. [2021-11-21 00:43:16,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:16,269 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 175 transitions. [2021-11-21 00:43:16,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-21 00:43:16,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:16,275 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:16,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:43:16,276 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:16,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:16,280 INFO L85 PathProgramCache]: Analyzing trace with hash -898580360, now seen corresponding path program 1 times [2021-11-21 00:43:16,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:16,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697067646] [2021-11-21 00:43:16,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:16,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:16,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:16,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697067646] [2021-11-21 00:43:16,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697067646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:16,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:16,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:43:16,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181603103] [2021-11-21 00:43:16,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:16,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:16,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:16,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:16,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:16,486 INFO L87 Difference]: Start difference. First operand 115 states and 175 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:18,499 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:43:18,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:18,860 INFO L93 Difference]: Finished difference Result 230 states and 344 transitions. [2021-11-21 00:43:18,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:18,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2021-11-21 00:43:18,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:18,863 INFO L225 Difference]: With dead ends: 230 [2021-11-21 00:43:18,864 INFO L226 Difference]: Without dead ends: 127 [2021-11-21 00:43:18,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:43:18,866 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 19 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:18,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 328 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 139 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 00:43:18,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-21 00:43:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2021-11-21 00:43:18,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.5263157894736843) internal successors, (174), 114 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:18,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 174 transitions. [2021-11-21 00:43:18,877 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 174 transitions. Word has length 49 [2021-11-21 00:43:18,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:18,878 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 174 transitions. [2021-11-21 00:43:18,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:18,878 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 174 transitions. [2021-11-21 00:43:18,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-21 00:43:18,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:18,881 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:43:18,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:43:18,881 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:18,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:18,882 INFO L85 PathProgramCache]: Analyzing trace with hash -555414545, now seen corresponding path program 1 times [2021-11-21 00:43:18,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:18,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646390335] [2021-11-21 00:43:18,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:18,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:19,007 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:19,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646390335] [2021-11-21 00:43:19,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646390335] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:19,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:19,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:43:19,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208500818] [2021-11-21 00:43:19,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:19,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:19,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:19,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:19,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:19,009 INFO L87 Difference]: Start difference. First operand 115 states and 174 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:21,019 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:43:21,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:21,381 INFO L93 Difference]: Finished difference Result 230 states and 343 transitions. [2021-11-21 00:43:21,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:21,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-11-21 00:43:21,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:21,385 INFO L225 Difference]: With dead ends: 230 [2021-11-21 00:43:21,385 INFO L226 Difference]: Without dead ends: 127 [2021-11-21 00:43:21,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:43:21,387 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 17 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:21,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 327 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 00:43:21,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-21 00:43:21,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2021-11-21 00:43:21,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.5175438596491229) internal successors, (173), 114 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:21,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 173 transitions. [2021-11-21 00:43:21,398 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 173 transitions. Word has length 50 [2021-11-21 00:43:21,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:21,399 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 173 transitions. [2021-11-21 00:43:21,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:21,399 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 173 transitions. [2021-11-21 00:43:21,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 00:43:21,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:21,402 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:43:21,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:43:21,402 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:21,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:21,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1621830741, now seen corresponding path program 1 times [2021-11-21 00:43:21,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:21,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763210329] [2021-11-21 00:43:21,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:21,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:21,476 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:21,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763210329] [2021-11-21 00:43:21,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763210329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:21,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:21,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:43:21,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632997517] [2021-11-21 00:43:21,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:21,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:21,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:21,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:21,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:21,479 INFO L87 Difference]: Start difference. First operand 115 states and 173 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:23,490 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:43:23,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:23,833 INFO L93 Difference]: Finished difference Result 230 states and 342 transitions. [2021-11-21 00:43:23,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:23,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-11-21 00:43:23,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:23,837 INFO L225 Difference]: With dead ends: 230 [2021-11-21 00:43:23,837 INFO L226 Difference]: Without dead ends: 127 [2021-11-21 00:43:23,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:43:23,839 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 15 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:23,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 327 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 00:43:23,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-21 00:43:23,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2021-11-21 00:43:23,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:23,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 172 transitions. [2021-11-21 00:43:23,853 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 172 transitions. Word has length 51 [2021-11-21 00:43:23,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:23,854 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 172 transitions. [2021-11-21 00:43:23,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:23,854 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 172 transitions. [2021-11-21 00:43:23,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 00:43:23,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:23,864 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] [2021-11-21 00:43:23,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:43:23,865 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:23,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:23,866 INFO L85 PathProgramCache]: Analyzing trace with hash 324725721, now seen corresponding path program 1 times [2021-11-21 00:43:23,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:23,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545545075] [2021-11-21 00:43:23,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:23,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:23,977 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:23,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545545075] [2021-11-21 00:43:23,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545545075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:23,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:23,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:43:23,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931202488] [2021-11-21 00:43:23,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:23,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:23,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:23,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:23,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:23,984 INFO L87 Difference]: Start difference. First operand 115 states and 172 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:25,997 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:43:26,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:26,352 INFO L93 Difference]: Finished difference Result 230 states and 341 transitions. [2021-11-21 00:43:26,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:26,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-11-21 00:43:26,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:26,356 INFO L225 Difference]: With dead ends: 230 [2021-11-21 00:43:26,356 INFO L226 Difference]: Without dead ends: 127 [2021-11-21 00:43:26,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:43:26,358 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 11 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:26,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 327 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 00:43:26,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-21 00:43:26,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2021-11-21 00:43:26,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.5) internal successors, (171), 114 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:26,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 171 transitions. [2021-11-21 00:43:26,368 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 171 transitions. Word has length 51 [2021-11-21 00:43:26,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:26,368 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 171 transitions. [2021-11-21 00:43:26,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:26,369 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 171 transitions. [2021-11-21 00:43:26,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 00:43:26,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:26,370 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:26,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:43:26,370 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:26,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:26,371 INFO L85 PathProgramCache]: Analyzing trace with hash -766295416, now seen corresponding path program 1 times [2021-11-21 00:43:26,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:26,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166091276] [2021-11-21 00:43:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:26,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:26,449 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:26,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166091276] [2021-11-21 00:43:26,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166091276] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:26,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:26,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:43:26,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772257771] [2021-11-21 00:43:26,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:26,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:26,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:26,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:26,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:26,455 INFO L87 Difference]: Start difference. First operand 115 states and 171 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:28,466 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:43:28,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:28,809 INFO L93 Difference]: Finished difference Result 230 states and 340 transitions. [2021-11-21 00:43:28,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:28,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-11-21 00:43:28,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:28,812 INFO L225 Difference]: With dead ends: 230 [2021-11-21 00:43:28,812 INFO L226 Difference]: Without dead ends: 127 [2021-11-21 00:43:28,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:43:28,814 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 9 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:28,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 328 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 139 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 00:43:28,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-21 00:43:28,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2021-11-21 00:43:28,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.4912280701754386) internal successors, (170), 114 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:28,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 170 transitions. [2021-11-21 00:43:28,827 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 170 transitions. Word has length 51 [2021-11-21 00:43:28,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:28,827 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 170 transitions. [2021-11-21 00:43:28,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:28,828 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 170 transitions. [2021-11-21 00:43:28,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 00:43:28,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:28,829 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:28,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:43:28,829 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:28,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:28,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1313006813, now seen corresponding path program 1 times [2021-11-21 00:43:28,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:28,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265123946] [2021-11-21 00:43:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:28,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:28,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:28,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265123946] [2021-11-21 00:43:28,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265123946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:28,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:28,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:43:28,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943115938] [2021-11-21 00:43:28,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:28,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:28,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:28,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:28,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:28,917 INFO L87 Difference]: Start difference. First operand 115 states and 170 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:30,927 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:43:31,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:31,223 INFO L93 Difference]: Finished difference Result 228 states and 337 transitions. [2021-11-21 00:43:31,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:31,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-21 00:43:31,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:31,227 INFO L225 Difference]: With dead ends: 228 [2021-11-21 00:43:31,228 INFO L226 Difference]: Without dead ends: 125 [2021-11-21 00:43:31,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:43:31,232 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 9 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:31,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 331 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 00:43:31,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-21 00:43:31,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2021-11-21 00:43:31,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.4824561403508771) internal successors, (169), 114 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:31,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 169 transitions. [2021-11-21 00:43:31,245 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 169 transitions. Word has length 52 [2021-11-21 00:43:31,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:31,245 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 169 transitions. [2021-11-21 00:43:31,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:31,246 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 169 transitions. [2021-11-21 00:43:31,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 00:43:31,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:31,257 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:31,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:43:31,258 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:31,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:31,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1942763638, now seen corresponding path program 1 times [2021-11-21 00:43:31,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:31,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156444057] [2021-11-21 00:43:31,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:31,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:31,320 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:31,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156444057] [2021-11-21 00:43:31,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156444057] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:31,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:31,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:43:31,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947954810] [2021-11-21 00:43:31,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:31,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:31,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:31,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:31,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:31,323 INFO L87 Difference]: Start difference. First operand 115 states and 169 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:33,334 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:43:33,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:33,587 INFO L93 Difference]: Finished difference Result 228 states and 336 transitions. [2021-11-21 00:43:33,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:33,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-21 00:43:33,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:33,589 INFO L225 Difference]: With dead ends: 228 [2021-11-21 00:43:33,589 INFO L226 Difference]: Without dead ends: 125 [2021-11-21 00:43:33,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:43:33,591 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 11 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:33,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 331 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-21 00:43:33,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-21 00:43:33,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2021-11-21 00:43:33,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.4736842105263157) internal successors, (168), 114 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 168 transitions. [2021-11-21 00:43:33,597 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 168 transitions. Word has length 52 [2021-11-21 00:43:33,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:33,597 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 168 transitions. [2021-11-21 00:43:33,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 168 transitions. [2021-11-21 00:43:33,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-21 00:43:33,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:33,599 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:33,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:43:33,599 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:33,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:33,599 INFO L85 PathProgramCache]: Analyzing trace with hash -628550746, now seen corresponding path program 1 times [2021-11-21 00:43:33,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:33,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141444740] [2021-11-21 00:43:33,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:33,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:33,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:33,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141444740] [2021-11-21 00:43:33,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141444740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:33,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:33,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:43:33,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297555440] [2021-11-21 00:43:33,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:33,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:33,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:33,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:33,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:33,688 INFO L87 Difference]: Start difference. First operand 115 states and 168 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:35,698 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:43:35,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:35,967 INFO L93 Difference]: Finished difference Result 220 states and 325 transitions. [2021-11-21 00:43:35,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:35,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-11-21 00:43:35,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:35,970 INFO L225 Difference]: With dead ends: 220 [2021-11-21 00:43:35,970 INFO L226 Difference]: Without dead ends: 117 [2021-11-21 00:43:35,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:43:35,971 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 5 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:35,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 341 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 00:43:35,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-21 00:43:35,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2021-11-21 00:43:35,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.4649122807017543) internal successors, (167), 114 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:35,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 167 transitions. [2021-11-21 00:43:35,978 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 167 transitions. Word has length 53 [2021-11-21 00:43:35,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:35,978 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 167 transitions. [2021-11-21 00:43:35,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:35,978 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 167 transitions. [2021-11-21 00:43:35,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-21 00:43:35,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:35,980 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:35,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 00:43:35,980 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:35,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:35,981 INFO L85 PathProgramCache]: Analyzing trace with hash -629892371, now seen corresponding path program 1 times [2021-11-21 00:43:35,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:35,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276852937] [2021-11-21 00:43:35,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:35,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:36,046 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:36,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276852937] [2021-11-21 00:43:36,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276852937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:36,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:36,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:43:36,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934120630] [2021-11-21 00:43:36,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:36,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:36,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:36,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:36,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:36,048 INFO L87 Difference]: Start difference. First operand 115 states and 167 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:38,059 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:43:38,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:38,411 INFO L93 Difference]: Finished difference Result 252 states and 373 transitions. [2021-11-21 00:43:38,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:38,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-21 00:43:38,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:38,414 INFO L225 Difference]: With dead ends: 252 [2021-11-21 00:43:38,414 INFO L226 Difference]: Without dead ends: 149 [2021-11-21 00:43:38,415 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 [2021-11-21 00:43:38,416 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 21 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:38,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 336 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 155 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 00:43:38,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-21 00:43:38,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 135. [2021-11-21 00:43:38,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.5) internal successors, (201), 134 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:38,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 201 transitions. [2021-11-21 00:43:38,439 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 201 transitions. Word has length 54 [2021-11-21 00:43:38,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:38,439 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 201 transitions. [2021-11-21 00:43:38,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:38,439 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 201 transitions. [2021-11-21 00:43:38,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-21 00:43:38,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:38,441 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:38,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 00:43:38,441 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:38,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:38,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1888040522, now seen corresponding path program 1 times [2021-11-21 00:43:38,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:38,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733445514] [2021-11-21 00:43:38,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:38,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:38,542 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:38,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733445514] [2021-11-21 00:43:38,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733445514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:38,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:38,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:43:38,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817938134] [2021-11-21 00:43:38,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:38,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:38,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:38,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:38,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:38,545 INFO L87 Difference]: Start difference. First operand 135 states and 201 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:40,558 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:43:40,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:40,911 INFO L93 Difference]: Finished difference Result 272 states and 406 transitions. [2021-11-21 00:43:40,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:40,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-21 00:43:40,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:40,914 INFO L225 Difference]: With dead ends: 272 [2021-11-21 00:43:40,914 INFO L226 Difference]: Without dead ends: 149 [2021-11-21 00:43:40,914 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 [2021-11-21 00:43:40,915 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 32 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:40,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 338 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 152 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 00:43:40,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-21 00:43:40,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 135. [2021-11-21 00:43:40,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.492537313432836) internal successors, (200), 134 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:40,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 200 transitions. [2021-11-21 00:43:40,921 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 200 transitions. Word has length 64 [2021-11-21 00:43:40,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:40,922 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 200 transitions. [2021-11-21 00:43:40,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:40,922 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 200 transitions. [2021-11-21 00:43:40,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-21 00:43:40,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:40,923 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:40,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 00:43:40,924 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:40,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:40,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1163908495, now seen corresponding path program 1 times [2021-11-21 00:43:40,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:40,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832375195] [2021-11-21 00:43:40,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:40,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:43:41,037 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:41,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832375195] [2021-11-21 00:43:41,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832375195] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:41,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:41,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:43:41,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491258253] [2021-11-21 00:43:41,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:41,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:43:41,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:41,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:43:41,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:43:41,040 INFO L87 Difference]: Start difference. First operand 135 states and 200 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:43,051 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:43:43,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:43,499 INFO L93 Difference]: Finished difference Result 275 states and 411 transitions. [2021-11-21 00:43:43,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:43:43,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-21 00:43:43,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:43,502 INFO L225 Difference]: With dead ends: 275 [2021-11-21 00:43:43,502 INFO L226 Difference]: Without dead ends: 152 [2021-11-21 00:43:43,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:43:43,503 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 116 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:43,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 237 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-21 00:43:43,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-21 00:43:43,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-11-21 00:43:43,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.4666666666666666) internal successors, (220), 150 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:43,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2021-11-21 00:43:43,511 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 65 [2021-11-21 00:43:43,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:43,511 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2021-11-21 00:43:43,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:43,512 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2021-11-21 00:43:43,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 00:43:43,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:43,513 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:43,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 00:43:43,514 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:43,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:43,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1393888704, now seen corresponding path program 1 times [2021-11-21 00:43:43,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:43,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125070951] [2021-11-21 00:43:43,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:43,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:43,573 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:43,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125070951] [2021-11-21 00:43:43,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125070951] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:43,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:43,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:43:43,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591409923] [2021-11-21 00:43:43,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:43,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:43,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:43,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:43,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:43,576 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:45,586 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:43:45,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:45,937 INFO L93 Difference]: Finished difference Result 304 states and 443 transitions. [2021-11-21 00:43:45,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:45,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-21 00:43:45,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:45,939 INFO L225 Difference]: With dead ends: 304 [2021-11-21 00:43:45,940 INFO L226 Difference]: Without dead ends: 165 [2021-11-21 00:43:45,940 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 [2021-11-21 00:43:45,940 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 30 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:45,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 338 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 152 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 00:43:45,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-21 00:43:45,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 151. [2021-11-21 00:43:45,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.46) internal successors, (219), 150 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:45,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 219 transitions. [2021-11-21 00:43:45,947 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 219 transitions. Word has length 66 [2021-11-21 00:43:45,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:45,948 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 219 transitions. [2021-11-21 00:43:45,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:45,948 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 219 transitions. [2021-11-21 00:43:45,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 00:43:45,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:45,949 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:45,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 00:43:45,950 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:45,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:45,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1358717545, now seen corresponding path program 1 times [2021-11-21 00:43:45,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:45,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197939620] [2021-11-21 00:43:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:45,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:46,012 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:46,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197939620] [2021-11-21 00:43:46,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197939620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:46,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:46,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:43:46,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267976032] [2021-11-21 00:43:46,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:46,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:46,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:46,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:46,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:46,015 INFO L87 Difference]: Start difference. First operand 151 states and 219 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:48,025 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:43:48,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:48,322 INFO L93 Difference]: Finished difference Result 304 states and 441 transitions. [2021-11-21 00:43:48,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:48,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-21 00:43:48,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:48,325 INFO L225 Difference]: With dead ends: 304 [2021-11-21 00:43:48,325 INFO L226 Difference]: Without dead ends: 165 [2021-11-21 00:43:48,325 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 [2021-11-21 00:43:48,326 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 25 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:48,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 338 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 152 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 00:43:48,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-21 00:43:48,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 151. [2021-11-21 00:43:48,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.4533333333333334) internal successors, (218), 150 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:48,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 218 transitions. [2021-11-21 00:43:48,334 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 218 transitions. Word has length 66 [2021-11-21 00:43:48,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:48,334 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 218 transitions. [2021-11-21 00:43:48,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:48,334 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 218 transitions. [2021-11-21 00:43:48,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 00:43:48,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:48,335 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:43:48,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 00:43:48,336 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:48,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:48,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1845228614, now seen corresponding path program 1 times [2021-11-21 00:43:48,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:48,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298833460] [2021-11-21 00:43:48,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:48,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:48,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:48,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298833460] [2021-11-21 00:43:48,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298833460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:48,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:48,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:43:48,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033912162] [2021-11-21 00:43:48,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:48,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:48,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:48,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:48,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:48,398 INFO L87 Difference]: Start difference. First operand 151 states and 218 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:50,409 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:43:50,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:50,772 INFO L93 Difference]: Finished difference Result 304 states and 439 transitions. [2021-11-21 00:43:50,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:50,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-21 00:43:50,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:50,775 INFO L225 Difference]: With dead ends: 304 [2021-11-21 00:43:50,775 INFO L226 Difference]: Without dead ends: 165 [2021-11-21 00:43:50,776 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 [2021-11-21 00:43:50,776 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 23 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:50,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 339 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-21 00:43:50,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-21 00:43:50,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 151. [2021-11-21 00:43:50,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.4466666666666668) internal successors, (217), 150 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:50,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 217 transitions. [2021-11-21 00:43:50,784 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 217 transitions. Word has length 66 [2021-11-21 00:43:50,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:50,785 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 217 transitions. [2021-11-21 00:43:50,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:50,785 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 217 transitions. [2021-11-21 00:43:50,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-21 00:43:50,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:50,786 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:50,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 00:43:50,787 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:50,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:50,787 INFO L85 PathProgramCache]: Analyzing trace with hash -563932728, now seen corresponding path program 1 times [2021-11-21 00:43:50,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:50,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979584386] [2021-11-21 00:43:50,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:50,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:50,864 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:50,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979584386] [2021-11-21 00:43:50,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979584386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:50,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:50,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:43:50,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364317519] [2021-11-21 00:43:50,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:50,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:50,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:50,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:50,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:50,869 INFO L87 Difference]: Start difference. First operand 151 states and 217 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:52,880 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:43:53,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:53,242 INFO L93 Difference]: Finished difference Result 304 states and 437 transitions. [2021-11-21 00:43:53,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:53,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-21 00:43:53,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:53,245 INFO L225 Difference]: With dead ends: 304 [2021-11-21 00:43:53,245 INFO L226 Difference]: Without dead ends: 165 [2021-11-21 00:43:53,245 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 [2021-11-21 00:43:53,246 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 27 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:53,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 338 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 152 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-21 00:43:53,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-21 00:43:53,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 151. [2021-11-21 00:43:53,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.44) internal successors, (216), 150 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 216 transitions. [2021-11-21 00:43:53,253 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 216 transitions. Word has length 67 [2021-11-21 00:43:53,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:53,253 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 216 transitions. [2021-11-21 00:43:53,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:53,254 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 216 transitions. [2021-11-21 00:43:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-21 00:43:53,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:53,254 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:43:53,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 00:43:53,255 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:53,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:53,258 INFO L85 PathProgramCache]: Analyzing trace with hash 665873119, now seen corresponding path program 1 times [2021-11-21 00:43:53,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:53,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192247709] [2021-11-21 00:43:53,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:53,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:53,318 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:53,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192247709] [2021-11-21 00:43:53,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192247709] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:53,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:53,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:43:53,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951428520] [2021-11-21 00:43:53,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:53,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:53,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:53,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:53,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:53,321 INFO L87 Difference]: Start difference. First operand 151 states and 216 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:55,332 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:43:55,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:55,640 INFO L93 Difference]: Finished difference Result 302 states and 433 transitions. [2021-11-21 00:43:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:55,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-21 00:43:55,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:55,643 INFO L225 Difference]: With dead ends: 302 [2021-11-21 00:43:55,643 INFO L226 Difference]: Without dead ends: 163 [2021-11-21 00:43:55,644 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 [2021-11-21 00:43:55,644 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 22 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:55,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 342 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 00:43:55,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-21 00:43:55,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 151. [2021-11-21 00:43:55,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.4333333333333333) internal successors, (215), 150 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:55,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 215 transitions. [2021-11-21 00:43:55,652 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 215 transitions. Word has length 67 [2021-11-21 00:43:55,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:55,652 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 215 transitions. [2021-11-21 00:43:55,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:55,653 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 215 transitions. [2021-11-21 00:43:55,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-21 00:43:55,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:55,654 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:55,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 00:43:55,654 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:55,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:55,655 INFO L85 PathProgramCache]: Analyzing trace with hash 137907717, now seen corresponding path program 1 times [2021-11-21 00:43:55,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:55,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301440190] [2021-11-21 00:43:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:55,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:55,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:55,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301440190] [2021-11-21 00:43:55,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301440190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:55,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:55,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:43:55,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82677434] [2021-11-21 00:43:55,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:55,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:55,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:55,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:55,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:55,720 INFO L87 Difference]: Start difference. First operand 151 states and 215 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:57,730 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:43:58,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:58,053 INFO L93 Difference]: Finished difference Result 302 states and 431 transitions. [2021-11-21 00:43:58,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:43:58,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-21 00:43:58,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:58,056 INFO L225 Difference]: With dead ends: 302 [2021-11-21 00:43:58,056 INFO L226 Difference]: Without dead ends: 163 [2021-11-21 00:43:58,057 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 [2021-11-21 00:43:58,057 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 24 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:58,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 342 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 00:43:58,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-21 00:43:58,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 151. [2021-11-21 00:43:58,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.4266666666666667) internal successors, (214), 150 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:58,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 214 transitions. [2021-11-21 00:43:58,065 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 214 transitions. Word has length 68 [2021-11-21 00:43:58,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:58,066 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 214 transitions. [2021-11-21 00:43:58,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:58,066 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 214 transitions. [2021-11-21 00:43:58,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-21 00:43:58,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:58,067 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:58,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-21 00:43:58,068 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:58,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:58,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1684887725, now seen corresponding path program 1 times [2021-11-21 00:43:58,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:58,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181961107] [2021-11-21 00:43:58,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:58,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:43:58,128 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:58,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181961107] [2021-11-21 00:43:58,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181961107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:58,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:58,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:43:58,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438377596] [2021-11-21 00:43:58,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:58,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:43:58,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:58,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:43:58,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:43:58,131 INFO L87 Difference]: Start difference. First operand 151 states and 214 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:00,141 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:44:00,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:00,392 INFO L93 Difference]: Finished difference Result 294 states and 420 transitions. [2021-11-21 00:44:00,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:44:00,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-21 00:44:00,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:00,395 INFO L225 Difference]: With dead ends: 294 [2021-11-21 00:44:00,395 INFO L226 Difference]: Without dead ends: 155 [2021-11-21 00:44:00,396 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 [2021-11-21 00:44:00,396 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 18 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:00,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 350 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-21 00:44:00,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-21 00:44:00,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2021-11-21 00:44:00,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.42) internal successors, (213), 150 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:00,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 213 transitions. [2021-11-21 00:44:00,404 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 213 transitions. Word has length 69 [2021-11-21 00:44:00,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:00,404 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 213 transitions. [2021-11-21 00:44:00,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:00,405 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 213 transitions. [2021-11-21 00:44:00,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 00:44:00,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:00,406 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:44:00,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-21 00:44:00,406 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:44:00,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:00,407 INFO L85 PathProgramCache]: Analyzing trace with hash 542316127, now seen corresponding path program 1 times [2021-11-21 00:44:00,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:44:00,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414179100] [2021-11-21 00:44:00,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:00,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:44:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:00,482 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:44:00,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414179100] [2021-11-21 00:44:00,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414179100] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:44:00,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114468398] [2021-11-21 00:44:00,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:00,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:44:00,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:44:00,488 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:44:00,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:44:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:00,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:44:00,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:00,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:44:01,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114468398] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:44:01,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2045778891] [2021-11-21 00:44:01,456 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2021-11-21 00:44:01,456 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:44:01,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:44:01,467 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:44:01,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:44:02,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:02,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:44:02,452 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Some non-self update cases but no top-level DER relation at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:340) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:278) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:264) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:44:02,456 INFO L158 Benchmark]: Toolchain (without parser) took 53947.66ms. Allocated memory was 102.8MB in the beginning and 157.3MB in the end (delta: 54.5MB). Free memory was 70.2MB in the beginning and 97.8MB in the end (delta: -27.6MB). Peak memory consumption was 91.6MB. Max. memory is 16.1GB. [2021-11-21 00:44:02,456 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 81.8MB. Free memory was 38.8MB in the beginning and 38.8MB in the end (delta: 42.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:44:02,457 INFO L158 Benchmark]: CACSL2BoogieTranslator took 705.85ms. Allocated memory is still 102.8MB. Free memory was 69.9MB in the beginning and 60.3MB in the end (delta: 9.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-21 00:44:02,457 INFO L158 Benchmark]: Boogie Procedure Inliner took 98.18ms. Allocated memory is still 102.8MB. Free memory was 60.3MB in the beginning and 55.6MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-21 00:44:02,458 INFO L158 Benchmark]: Boogie Preprocessor took 110.48ms. Allocated memory is still 102.8MB. Free memory was 55.6MB in the beginning and 48.2MB in the end (delta: 7.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 00:44:02,458 INFO L158 Benchmark]: RCFGBuilder took 3589.13ms. Allocated memory was 102.8MB in the beginning and 130.0MB in the end (delta: 27.3MB). Free memory was 48.2MB in the beginning and 72.3MB in the end (delta: -24.0MB). Peak memory consumption was 33.2MB. Max. memory is 16.1GB. [2021-11-21 00:44:02,458 INFO L158 Benchmark]: TraceAbstraction took 49435.44ms. Allocated memory was 130.0MB in the beginning and 157.3MB in the end (delta: 27.3MB). Free memory was 72.3MB in the beginning and 97.8MB in the end (delta: -25.5MB). Peak memory consumption was 66.8MB. Max. memory is 16.1GB. [2021-11-21 00:44:02,467 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 81.8MB. Free memory was 38.8MB in the beginning and 38.8MB in the end (delta: 42.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 705.85ms. Allocated memory is still 102.8MB. Free memory was 69.9MB in the beginning and 60.3MB in the end (delta: 9.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 98.18ms. Allocated memory is still 102.8MB. Free memory was 60.3MB in the beginning and 55.6MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 110.48ms. Allocated memory is still 102.8MB. Free memory was 55.6MB in the beginning and 48.2MB in the end (delta: 7.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 3589.13ms. Allocated memory was 102.8MB in the beginning and 130.0MB in the end (delta: 27.3MB). Free memory was 48.2MB in the beginning and 72.3MB in the end (delta: -24.0MB). Peak memory consumption was 33.2MB. Max. memory is 16.1GB. * TraceAbstraction took 49435.44ms. Allocated memory was 130.0MB in the beginning and 157.3MB in the end (delta: 27.3MB). Free memory was 72.3MB in the beginning and 97.8MB in the end (delta: -25.5MB). Peak memory consumption was 66.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Some non-self update cases but no top-level DER relation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Some non-self update cases but no top-level DER relation: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-21 00:44:02,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P --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 ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:44:04,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:44:04,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:44:04,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:44:04,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:44:04,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:44:04,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:44:04,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:44:04,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:44:04,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:44:04,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:44:04,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:44:04,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:44:04,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:44:04,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:44:04,999 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:44:05,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:44:05,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:44:05,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:44:05,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:44:05,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:44:05,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:44:05,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:44:05,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:44:05,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:44:05,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:44:05,043 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:44:05,045 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:44:05,045 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:44:05,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:44:05,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:44:05,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:44:05,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:44:05,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:44:05,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:44:05,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:44:05,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:44:05,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:44:05,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:44:05,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:44:05,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:44:05,063 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-21 00:44:05,105 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:44:05,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:44:05,106 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:44:05,106 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:44:05,107 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:44:05,108 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:44:05,108 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:44:05,108 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:44:05,108 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:44:05,109 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:44:05,110 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:44:05,110 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:44:05,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:44:05,112 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:44:05,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:44:05,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:44:05,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:44:05,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:44:05,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:44:05,113 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 00:44:05,113 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 00:44:05,114 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:44:05,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:44:05,114 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:44:05,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:44:05,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:44:05,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 00:44:05,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:44:05,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:44:05,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:44:05,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:44:05,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:44:05,117 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 00:44:05,117 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 00:44:05,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:44:05,118 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:44:05,118 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:44:05,118 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e [2021-11-21 00:44:05,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:44:05,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:44:05,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:44:05,493 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:44:05,493 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:44:05,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-11-21 00:44:05,571 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/data/2b695a888/a07c0659354c40e8bcf6758113477010/FLAG85840a75e [2021-11-21 00:44:06,221 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:44:06,222 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-11-21 00:44:06,246 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/data/2b695a888/a07c0659354c40e8bcf6758113477010/FLAG85840a75e [2021-11-21 00:44:06,400 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/data/2b695a888/a07c0659354c40e8bcf6758113477010 [2021-11-21 00:44:06,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:44:06,406 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:44:06,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:44:06,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:44:06,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:44:06,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:44:06" (1/1) ... [2021-11-21 00:44:06,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e905353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:44:06, skipping insertion in model container [2021-11-21 00:44:06,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:44:06" (1/1) ... [2021-11-21 00:44:06,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:44:06,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:44:06,927 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_d449ca9e-aa08-4398-91af-41425d573fc7/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-11-21 00:44:06,937 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:44:06,954 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:44:07,128 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_d449ca9e-aa08-4398-91af-41425d573fc7/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-11-21 00:44:07,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:44:07,179 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:44:07,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:44:07 WrapperNode [2021-11-21 00:44:07,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:44:07,182 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:44:07,182 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:44:07,182 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:44:07,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:44:07" (1/1) ... [2021-11-21 00:44:07,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:44:07" (1/1) ... [2021-11-21 00:44:07,318 INFO L137 Inliner]: procedures = 35, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 752 [2021-11-21 00:44:07,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:44:07,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:44:07,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:44:07,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:44:07,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:44:07" (1/1) ... [2021-11-21 00:44:07,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:44:07" (1/1) ... [2021-11-21 00:44:07,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:44:07" (1/1) ... [2021-11-21 00:44:07,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:44:07" (1/1) ... [2021-11-21 00:44:07,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:44:07" (1/1) ... [2021-11-21 00:44:07,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:44:07" (1/1) ... [2021-11-21 00:44:07,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:44:07" (1/1) ... [2021-11-21 00:44:07,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:44:07,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:44:07,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:44:07,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:44:07,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:44:07" (1/1) ... [2021-11-21 00:44:07,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:44:07,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:44:07,504 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:44:07,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:44:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:44:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 00:44:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:44:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-21 00:44:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:44:07,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:44:07,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:44:07,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:44:07,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-21 00:44:07,782 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:44:07,783 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:44:07,801 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-21 00:44:12,187 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-21 00:44:12,187 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-21 00:44:12,187 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:44:12,196 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:44:12,196 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:44:12,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:44:12 BoogieIcfgContainer [2021-11-21 00:44:12,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:44:12,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:44:12,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:44:12,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:44:12,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:44:06" (1/3) ... [2021-11-21 00:44:12,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd923ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:44:12, skipping insertion in model container [2021-11-21 00:44:12,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:44:07" (2/3) ... [2021-11-21 00:44:12,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd923ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:44:12, skipping insertion in model container [2021-11-21 00:44:12,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:44:12" (3/3) ... [2021-11-21 00:44:12,206 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.02.i.cil-2.c [2021-11-21 00:44:12,212 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:44:12,212 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:44:12,262 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:44:12,269 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 [2021-11-21 00:44:12,269 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:44:12,288 INFO L276 IsEmpty]: Start isEmpty. Operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:12,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 00:44:12,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:12,298 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] [2021-11-21 00:44:12,299 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:44:12,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:12,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1430118927, now seen corresponding path program 1 times [2021-11-21 00:44:12,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:44:12,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334219855] [2021-11-21 00:44:12,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:12,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:44:12,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:44:12,325 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:44:12,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 00:44:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:12,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:44:12,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:12,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:13,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:44:13,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334219855] [2021-11-21 00:44:13,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334219855] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:44:13,289 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:44:13,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-21 00:44:13,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473350690] [2021-11-21 00:44:13,292 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:44:13,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:44:13,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:44:13,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:44:13,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:44:13,327 INFO L87 Difference]: Start difference. First operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:13,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:13,512 INFO L93 Difference]: Finished difference Result 542 states and 920 transitions. [2021-11-21 00:44:13,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:44:13,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-21 00:44:13,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:13,534 INFO L225 Difference]: With dead ends: 542 [2021-11-21 00:44:13,535 INFO L226 Difference]: Without dead ends: 368 [2021-11-21 00:44:13,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:44:13,542 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 370 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:13,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 667 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:44:13,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-21 00:44:13,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2021-11-21 00:44:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.5231607629427792) internal successors, (559), 367 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 559 transitions. [2021-11-21 00:44:13,611 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 559 transitions. Word has length 47 [2021-11-21 00:44:13,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:13,612 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 559 transitions. [2021-11-21 00:44:13,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:13,613 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 559 transitions. [2021-11-21 00:44:13,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 00:44:13,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:13,623 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:44:13,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:13,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:44:13,827 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:44:13,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:13,828 INFO L85 PathProgramCache]: Analyzing trace with hash -483730754, now seen corresponding path program 1 times [2021-11-21 00:44:13,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:44:13,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919276976] [2021-11-21 00:44:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:13,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:44:13,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:44:13,833 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:44:13,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 00:44:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:14,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:44:14,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:14,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:44:14,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:44:14,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919276976] [2021-11-21 00:44:14,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919276976] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:44:14,732 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:44:14,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-21 00:44:14,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173167127] [2021-11-21 00:44:14,733 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:44:14,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:44:14,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:44:14,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:44:14,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:44:14,736 INFO L87 Difference]: Start difference. First operand 368 states and 559 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:14,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:14,816 INFO L93 Difference]: Finished difference Result 723 states and 1103 transitions. [2021-11-21 00:44:14,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:44:14,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2021-11-21 00:44:14,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:14,821 INFO L225 Difference]: With dead ends: 723 [2021-11-21 00:44:14,822 INFO L226 Difference]: Without dead ends: 484 [2021-11-21 00:44:14,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:44:14,825 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 155 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:14,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 557 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:44:14,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-21 00:44:14,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 484. [2021-11-21 00:44:14,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 1.5196687370600415) internal successors, (734), 483 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:14,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 734 transitions. [2021-11-21 00:44:14,861 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 734 transitions. Word has length 87 [2021-11-21 00:44:14,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:14,862 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 734 transitions. [2021-11-21 00:44:14,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:14,862 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 734 transitions. [2021-11-21 00:44:14,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-21 00:44:14,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:14,870 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:44:14,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:15,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:44:15,090 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:44:15,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:15,092 INFO L85 PathProgramCache]: Analyzing trace with hash 595564554, now seen corresponding path program 1 times [2021-11-21 00:44:15,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:44:15,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459055102] [2021-11-21 00:44:15,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:15,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:44:15,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:44:15,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:44:15,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 00:44:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:15,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:44:15,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:15,684 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:44:15,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:44:16,060 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:44:16,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459055102] [2021-11-21 00:44:16,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459055102] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:44:16,061 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:44:16,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-21 00:44:16,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788653546] [2021-11-21 00:44:16,062 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:44:16,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:44:16,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:44:16,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:44:16,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:44:16,066 INFO L87 Difference]: Start difference. First operand 484 states and 734 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:16,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:16,202 INFO L93 Difference]: Finished difference Result 1074 states and 1637 transitions. [2021-11-21 00:44:16,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:44:16,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 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 [2021-11-21 00:44:16,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:16,210 INFO L225 Difference]: With dead ends: 1074 [2021-11-21 00:44:16,210 INFO L226 Difference]: Without dead ends: 719 [2021-11-21 00:44:16,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:44:16,224 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 324 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:16,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 724 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:44:16,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-11-21 00:44:16,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 719. [2021-11-21 00:44:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 1.5181058495821727) internal successors, (1090), 718 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:16,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1090 transitions. [2021-11-21 00:44:16,286 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1090 transitions. Word has length 109 [2021-11-21 00:44:16,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:16,288 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 1090 transitions. [2021-11-21 00:44:16,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:16,290 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1090 transitions. [2021-11-21 00:44:16,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-21 00:44:16,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:16,305 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:44:16,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-21 00:44:16,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:44:16,518 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:44:16,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:16,519 INFO L85 PathProgramCache]: Analyzing trace with hash -65336556, now seen corresponding path program 1 times [2021-11-21 00:44:16,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:44:16,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691615510] [2021-11-21 00:44:16,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:16,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:44:16,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:44:16,522 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:44:16,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 00:44:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:16,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 00:44:16,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:16,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:44:17,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:44:17,174 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-11-21 00:44:17,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 22 [2021-11-21 00:44:17,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:17,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:17,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:17,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-21 00:44:17,313 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-21 00:44:17,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-11-21 00:44:17,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:17,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-21 00:44:17,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-21 00:44:17,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-21 00:44:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-11-21 00:44:17,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-11-21 00:44:18,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:44:18,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691615510] [2021-11-21 00:44:18,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691615510] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:44:18,572 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:44:18,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-21 00:44:18,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757447870] [2021-11-21 00:44:18,573 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:44:18,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:44:18,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:44:18,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:44:18,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:44:18,575 INFO L87 Difference]: Start difference. First operand 719 states and 1090 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:20,595 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:44:22,613 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:44:24,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:24,990 INFO L93 Difference]: Finished difference Result 1435 states and 2176 transitions. [2021-11-21 00:44:24,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:44:24,992 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 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 150 [2021-11-21 00:44:24,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:24,997 INFO L225 Difference]: With dead ends: 1435 [2021-11-21 00:44:24,997 INFO L226 Difference]: Without dead ends: 719 [2021-11-21 00:44:24,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:44:25,000 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 12 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:25,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 967 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 171 Invalid, 2 Unknown, 58 Unchecked, 6.3s Time] [2021-11-21 00:44:25,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-11-21 00:44:25,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 719. [2021-11-21 00:44:25,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 1.5167130919220055) internal successors, (1089), 718 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:25,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1089 transitions. [2021-11-21 00:44:25,029 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1089 transitions. Word has length 150 [2021-11-21 00:44:25,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:25,030 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 1089 transitions. [2021-11-21 00:44:25,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:25,030 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1089 transitions. [2021-11-21 00:44:25,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-21 00:44:25,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:25,034 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:44:25,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:25,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:44:25,249 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:44:25,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:25,249 INFO L85 PathProgramCache]: Analyzing trace with hash -329984046, now seen corresponding path program 1 times [2021-11-21 00:44:25,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:44:25,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518627829] [2021-11-21 00:44:25,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:25,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:44:25,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:44:25,252 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:44:25,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-21 00:44:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:25,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:44:25,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:25,839 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:44:25,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:44:26,141 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:44:26,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-21 00:44:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-21 00:44:26,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-21 00:44:26,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:44:26,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518627829] [2021-11-21 00:44:26,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518627829] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:44:26,754 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:44:26,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:44:26,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477007432] [2021-11-21 00:44:26,754 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:44:26,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:44:26,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:44:26,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:44:26,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:44:26,757 INFO L87 Difference]: Start difference. First operand 719 states and 1089 transitions. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:28,779 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:44:37,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:37,218 INFO L93 Difference]: Finished difference Result 2592 states and 3954 transitions. [2021-11-21 00:44:37,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:44:37,221 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 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 150 [2021-11-21 00:44:37,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:37,238 INFO L225 Difference]: With dead ends: 2592 [2021-11-21 00:44:37,238 INFO L226 Difference]: Without dead ends: 1883 [2021-11-21 00:44:37,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:44:37,242 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 237 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 72 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:37,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 728 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 724 Invalid, 1 Unknown, 0 Unchecked, 10.3s Time] [2021-11-21 00:44:37,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-11-21 00:44:37,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 851. [2021-11-21 00:44:37,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.5494117647058823) internal successors, (1317), 850 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:37,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1317 transitions. [2021-11-21 00:44:37,293 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1317 transitions. Word has length 150 [2021-11-21 00:44:37,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:37,295 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1317 transitions. [2021-11-21 00:44:37,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:37,295 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1317 transitions. [2021-11-21 00:44:37,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-21 00:44:37,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:37,302 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:44:37,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:37,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:44:37,515 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:44:37,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:37,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1210495758, now seen corresponding path program 1 times [2021-11-21 00:44:37,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:44:37,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604335617] [2021-11-21 00:44:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:37,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:44:37,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:44:37,519 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:44:37,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-21 00:44:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:38,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:44:38,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:38,227 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:44:38,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:44:38,570 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:44:38,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-21 00:44:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-21 00:44:38,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-21 00:44:39,177 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:44:39,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604335617] [2021-11-21 00:44:39,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1604335617] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:44:39,177 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:44:39,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:44:39,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668174348] [2021-11-21 00:44:39,178 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:44:39,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:44:39,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:44:39,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:44:39,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:44:39,179 INFO L87 Difference]: Start difference. First operand 851 states and 1317 transitions. Second operand has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:41,197 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:44:43,217 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:44:48,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:48,768 INFO L93 Difference]: Finished difference Result 2807 states and 4330 transitions. [2021-11-21 00:44:48,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:44:48,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 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 [2021-11-21 00:44:48,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:48,782 INFO L225 Difference]: With dead ends: 2807 [2021-11-21 00:44:48,782 INFO L226 Difference]: Without dead ends: 1966 [2021-11-21 00:44:48,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:44:48,785 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 228 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 74 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:48,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 540 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 538 Invalid, 2 Unknown, 0 Unchecked, 9.4s Time] [2021-11-21 00:44:48,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-11-21 00:44:48,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 967. [2021-11-21 00:44:48,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 1.5714285714285714) internal successors, (1518), 966 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:48,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1518 transitions. [2021-11-21 00:44:48,840 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1518 transitions. Word has length 151 [2021-11-21 00:44:48,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:48,840 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 1518 transitions. [2021-11-21 00:44:48,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1518 transitions. [2021-11-21 00:44:48,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-21 00:44:48,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:48,845 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:44:48,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:49,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:44:49,061 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:44:49,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:49,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1783349868, now seen corresponding path program 1 times [2021-11-21 00:44:49,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:44:49,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430691968] [2021-11-21 00:44:49,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:49,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:44:49,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:44:49,067 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:44:49,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-21 00:44:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:49,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:44:49,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:49,657 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:44:49,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:44:49,898 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:44:49,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-21 00:44:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-21 00:44:50,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:50,553 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-21 00:44:50,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:44:50,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430691968] [2021-11-21 00:44:50,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430691968] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:44:50,554 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:44:50,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:44:50,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383896839] [2021-11-21 00:44:50,555 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:44:50,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:44:50,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:44:50,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:44:50,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:44:50,557 INFO L87 Difference]: Start difference. First operand 967 states and 1518 transitions. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:44:52,573 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:45:00,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:45:00,237 INFO L93 Difference]: Finished difference Result 2921 states and 4538 transitions. [2021-11-21 00:45:00,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:45:00,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 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 167 [2021-11-21 00:45:00,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:45:00,254 INFO L225 Difference]: With dead ends: 2921 [2021-11-21 00:45:00,254 INFO L226 Difference]: Without dead ends: 2104 [2021-11-21 00:45:00,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:45:00,257 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 226 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:45:00,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 833 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 548 Invalid, 1 Unknown, 0 Unchecked, 9.5s Time] [2021-11-21 00:45:00,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-11-21 00:45:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1081. [2021-11-21 00:45:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 1.5787037037037037) internal successors, (1705), 1080 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:45:00,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1705 transitions. [2021-11-21 00:45:00,335 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1705 transitions. Word has length 167 [2021-11-21 00:45:00,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:45:00,336 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1705 transitions. [2021-11-21 00:45:00,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:45:00,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1705 transitions. [2021-11-21 00:45:00,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-21 00:45:00,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:45:00,341 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:45:00,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:45:00,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:45:00,558 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:45:00,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:45:00,559 INFO L85 PathProgramCache]: Analyzing trace with hash 113892171, now seen corresponding path program 1 times [2021-11-21 00:45:00,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:45:00,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146117622] [2021-11-21 00:45:00,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:00,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:45:00,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:45:00,563 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:45:00,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-21 00:45:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:00,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:45:00,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:45:01,096 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:45:01,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:45:01,357 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:45:01,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-21 00:45:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-21 00:45:01,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:45:02,038 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-21 00:45:02,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:45:02,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146117622] [2021-11-21 00:45:02,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146117622] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:45:02,038 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:45:02,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:45:02,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812845739] [2021-11-21 00:45:02,039 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:45:02,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:45:02,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:45:02,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:45:02,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:45:02,040 INFO L87 Difference]: Start difference. First operand 1081 states and 1705 transitions. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:45:04,054 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:45:06,062 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:45:12,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:45:12,786 INFO L93 Difference]: Finished difference Result 3027 states and 4697 transitions. [2021-11-21 00:45:12,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:45:12,789 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 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 168 [2021-11-21 00:45:12,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:45:12,802 INFO L225 Difference]: With dead ends: 3027 [2021-11-21 00:45:12,803 INFO L226 Difference]: Without dead ends: 2115 [2021-11-21 00:45:12,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:45:12,805 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 231 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 72 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:45:12,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 536 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 540 Invalid, 2 Unknown, 0 Unchecked, 10.6s Time] [2021-11-21 00:45:12,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-11-21 00:45:12,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1098. [2021-11-21 00:45:12,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1097 states have (on average 1.5733819507748406) internal successors, (1726), 1097 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:45:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1726 transitions. [2021-11-21 00:45:12,867 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1726 transitions. Word has length 168 [2021-11-21 00:45:12,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:45:12,867 INFO L470 AbstractCegarLoop]: Abstraction has 1098 states and 1726 transitions. [2021-11-21 00:45:12,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:45:12,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1726 transitions. [2021-11-21 00:45:12,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-21 00:45:12,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:45:12,872 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:45:12,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:45:13,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:45:13,089 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:45:13,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:45:13,089 INFO L85 PathProgramCache]: Analyzing trace with hash 137677863, now seen corresponding path program 1 times [2021-11-21 00:45:13,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:45:13,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640563165] [2021-11-21 00:45:13,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:13,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:45:13,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:45:13,093 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:45:13,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-21 00:45:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:13,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:45:13,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:45:13,694 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:45:13,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:45:13,986 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:45:13,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-21 00:45:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-21 00:45:14,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:45:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-21 00:45:14,705 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:45:14,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640563165] [2021-11-21 00:45:14,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640563165] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:45:14,705 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:45:14,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:45:14,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220160979] [2021-11-21 00:45:14,706 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:45:14,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:45:14,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:45:14,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:45:14,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:45:14,707 INFO L87 Difference]: Start difference. First operand 1098 states and 1726 transitions. Second operand has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:45:16,719 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:45:22,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:45:22,823 INFO L93 Difference]: Finished difference Result 3138 states and 4862 transitions. [2021-11-21 00:45:22,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:45:22,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 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 169 [2021-11-21 00:45:22,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:45:22,837 INFO L225 Difference]: With dead ends: 3138 [2021-11-21 00:45:22,838 INFO L226 Difference]: Without dead ends: 2221 [2021-11-21 00:45:22,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:45:22,840 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 226 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 71 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:45:22,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 525 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 527 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2021-11-21 00:45:22,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-11-21 00:45:22,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 1224. [2021-11-21 00:45:22,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 1.5739983646770237) internal successors, (1925), 1223 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:45:22,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1925 transitions. [2021-11-21 00:45:22,914 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1925 transitions. Word has length 169 [2021-11-21 00:45:22,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:45:22,914 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 1925 transitions. [2021-11-21 00:45:22,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:45:22,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1925 transitions. [2021-11-21 00:45:22,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-21 00:45:22,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:45:22,919 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:45:22,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:45:23,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:45:23,135 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:45:23,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:45:23,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2080444553, now seen corresponding path program 1 times [2021-11-21 00:45:23,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:45:23,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387096492] [2021-11-21 00:45:23,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:23,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:45:23,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:45:23,138 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:45:23,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-21 00:45:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:23,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:45:23,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:45:23,661 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:45:23,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:45:24,057 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:45:24,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-21 00:45:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-21 00:45:24,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:45:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-21 00:45:24,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:45:24,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387096492] [2021-11-21 00:45:24,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387096492] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:45:24,748 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:45:24,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:45:24,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763584192] [2021-11-21 00:45:24,748 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:45:24,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:45:24,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:45:24,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:45:24,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:45:24,749 INFO L87 Difference]: Start difference. First operand 1224 states and 1925 transitions. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 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) [2021-11-21 00:45:26,761 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:45:32,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:45:32,143 INFO L93 Difference]: Finished difference Result 3517 states and 5454 transitions. [2021-11-21 00:45:32,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:45:32,145 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 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 179 [2021-11-21 00:45:32,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:45:32,155 INFO L225 Difference]: With dead ends: 3517 [2021-11-21 00:45:32,155 INFO L226 Difference]: Without dead ends: 2314 [2021-11-21 00:45:32,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:45:32,158 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 201 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:45:32,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 556 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 506 Invalid, 1 Unknown, 0 Unchecked, 7.2s Time] [2021-11-21 00:45:32,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-11-21 00:45:32,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1416. [2021-11-21 00:45:32,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 1.5851590106007067) internal successors, (2243), 1415 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:45:32,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2243 transitions. [2021-11-21 00:45:32,242 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2243 transitions. Word has length 179 [2021-11-21 00:45:32,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:45:32,242 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 2243 transitions. [2021-11-21 00:45:32,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 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) [2021-11-21 00:45:32,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2243 transitions. [2021-11-21 00:45:32,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-21 00:45:32,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:45:32,247 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:45:32,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:45:32,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:45:32,463 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:45:32,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:45:32,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1105638902, now seen corresponding path program 1 times [2021-11-21 00:45:32,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:45:32,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931817637] [2021-11-21 00:45:32,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:32,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:45:32,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:45:32,465 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:45:32,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-21 00:45:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:32,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:45:32,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:45:32,968 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:45:32,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:45:33,087 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:45:33,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-21 00:45:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-21 00:45:33,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:45:33,729 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-21 00:45:33,729 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:45:33,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931817637] [2021-11-21 00:45:33,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931817637] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:45:33,729 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:45:33,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:45:33,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017849883] [2021-11-21 00:45:33,730 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:45:33,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:45:33,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:45:33,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:45:33,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:45:33,731 INFO L87 Difference]: Start difference. First operand 1416 states and 2243 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) [2021-11-21 00:45:35,742 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:45:41,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:45:41,069 INFO L93 Difference]: Finished difference Result 3770 states and 5882 transitions. [2021-11-21 00:45:41,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:45:41,070 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 182 [2021-11-21 00:45:41,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:45:41,082 INFO L225 Difference]: With dead ends: 3770 [2021-11-21 00:45:41,082 INFO L226 Difference]: Without dead ends: 2375 [2021-11-21 00:45:41,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:45:41,085 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 243 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 69 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:45:41,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 519 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 515 Invalid, 1 Unknown, 0 Unchecked, 7.2s Time] [2021-11-21 00:45:41,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-11-21 00:45:41,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 1416. [2021-11-21 00:45:41,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 1.563957597173145) internal successors, (2213), 1415 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:45:41,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2213 transitions. [2021-11-21 00:45:41,171 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2213 transitions. Word has length 182 [2021-11-21 00:45:41,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:45:41,171 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 2213 transitions. [2021-11-21 00:45:41,172 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) [2021-11-21 00:45:41,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2213 transitions. [2021-11-21 00:45:41,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-21 00:45:41,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:45:41,177 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:45:41,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:45:41,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:45:41,394 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:45:41,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:45:41,395 INFO L85 PathProgramCache]: Analyzing trace with hash 612161782, now seen corresponding path program 1 times [2021-11-21 00:45:41,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:45:41,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641784927] [2021-11-21 00:45:41,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:41,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:45:41,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:45:41,397 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:45:41,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-21 00:45:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:41,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:45:41,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:45:41,913 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:45:41,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:45:42,029 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:45:42,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-21 00:45:42,278 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-21 00:45:42,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:45:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-21 00:45:42,727 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:45:42,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641784927] [2021-11-21 00:45:42,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641784927] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:45:42,727 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:45:42,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:45:42,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488607670] [2021-11-21 00:45:42,728 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:45:42,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:45:42,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:45:42,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:45:42,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:45:42,729 INFO L87 Difference]: Start difference. First operand 1416 states and 2213 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:45:44,743 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:45:46,759 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:45:52,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:45:52,567 INFO L93 Difference]: Finished difference Result 3770 states and 5818 transitions. [2021-11-21 00:45:52,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:45:52,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 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 182 [2021-11-21 00:45:52,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:45:52,577 INFO L225 Difference]: With dead ends: 3770 [2021-11-21 00:45:52,577 INFO L226 Difference]: Without dead ends: 2375 [2021-11-21 00:45:52,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:45:52,579 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 239 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:45:52,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 524 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 521 Invalid, 2 Unknown, 0 Unchecked, 9.7s Time] [2021-11-21 00:45:52,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-11-21 00:45:52,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 1416. [2021-11-21 00:45:52,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 1.542756183745583) internal successors, (2183), 1415 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:45:52,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2183 transitions. [2021-11-21 00:45:52,668 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2183 transitions. Word has length 182 [2021-11-21 00:45:52,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:45:52,669 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 2183 transitions. [2021-11-21 00:45:52,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:45:52,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2183 transitions. [2021-11-21 00:45:52,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-21 00:45:52,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:45:52,672 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:45:52,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-21 00:45:52,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:45:52,892 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:45:52,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:45:52,892 INFO L85 PathProgramCache]: Analyzing trace with hash 610130770, now seen corresponding path program 1 times [2021-11-21 00:45:52,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:45:52,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193970520] [2021-11-21 00:45:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:52,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:45:52,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:45:52,894 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:45:52,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-21 00:45:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:53,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:45:53,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:45:53,409 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:45:53,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:45:53,542 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:45:53,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-21 00:45:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-21 00:45:53,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:45:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-21 00:45:54,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:45:54,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193970520] [2021-11-21 00:45:54,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193970520] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:45:54,215 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:45:54,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:45:54,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921936098] [2021-11-21 00:45:54,215 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:45:54,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:45:54,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:45:54,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:45:54,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:45:54,217 INFO L87 Difference]: Start difference. First operand 1416 states and 2183 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) [2021-11-21 00:45:56,236 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:46:01,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:01,838 INFO L93 Difference]: Finished difference Result 3770 states and 5754 transitions. [2021-11-21 00:46:01,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:46:01,839 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 183 [2021-11-21 00:46:01,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:01,852 INFO L225 Difference]: With dead ends: 3770 [2021-11-21 00:46:01,852 INFO L226 Difference]: Without dead ends: 2375 [2021-11-21 00:46:01,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:46:01,855 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 235 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 69 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:01,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 522 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 521 Invalid, 1 Unknown, 0 Unchecked, 7.4s Time] [2021-11-21 00:46:01,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-11-21 00:46:01,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 1416. [2021-11-21 00:46:01,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 1.5215547703180212) internal successors, (2153), 1415 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:01,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2153 transitions. [2021-11-21 00:46:01,929 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2153 transitions. Word has length 183 [2021-11-21 00:46:01,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:01,929 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 2153 transitions. [2021-11-21 00:46:01,930 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) [2021-11-21 00:46:01,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2153 transitions. [2021-11-21 00:46:01,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-21 00:46:01,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:01,933 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:01,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-21 00:46:02,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:46:02,149 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:02,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:02,150 INFO L85 PathProgramCache]: Analyzing trace with hash 944860177, now seen corresponding path program 1 times [2021-11-21 00:46:02,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:46:02,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727599213] [2021-11-21 00:46:02,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:02,150 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:46:02,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:46:02,151 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:46:02,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-21 00:46:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:02,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:46:02,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:02,710 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:46:02,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:46:02,884 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:46:02,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-21 00:46:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-21 00:46:03,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:46:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-21 00:46:03,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:46:03,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727599213] [2021-11-21 00:46:03,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727599213] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:46:03,583 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:46:03,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:46:03,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785387172] [2021-11-21 00:46:03,584 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:46:03,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:46:03,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:46:03,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:46:03,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:46:03,585 INFO L87 Difference]: Start difference. First operand 1416 states and 2153 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:05,601 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:46:07,611 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:46:15,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:15,387 INFO L93 Difference]: Finished difference Result 3770 states and 5690 transitions. [2021-11-21 00:46:15,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:46:15,394 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 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 184 [2021-11-21 00:46:15,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:15,406 INFO L225 Difference]: With dead ends: 3770 [2021-11-21 00:46:15,406 INFO L226 Difference]: Without dead ends: 2375 [2021-11-21 00:46:15,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:46:15,409 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 231 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:15,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 683 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 687 Invalid, 2 Unknown, 0 Unchecked, 11.6s Time] [2021-11-21 00:46:15,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-11-21 00:46:15,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 1416. [2021-11-21 00:46:15,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 1.5003533568904595) internal successors, (2123), 1415 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:15,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2123 transitions. [2021-11-21 00:46:15,499 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2123 transitions. Word has length 184 [2021-11-21 00:46:15,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:15,500 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 2123 transitions. [2021-11-21 00:46:15,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:15,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2123 transitions. [2021-11-21 00:46:15,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-21 00:46:15,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:15,504 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:15,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-21 00:46:15,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:46:15,717 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:15,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:15,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1165739315, now seen corresponding path program 1 times [2021-11-21 00:46:15,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:46:15,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1143808331] [2021-11-21 00:46:15,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:15,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:46:15,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:46:15,719 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:46:15,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-21 00:46:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:16,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:46:16,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:16,242 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:46:16,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:46:16,411 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:46:16,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-21 00:46:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-21 00:46:16,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:46:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-21 00:46:17,193 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:46:17,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1143808331] [2021-11-21 00:46:17,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1143808331] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:46:17,193 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:46:17,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:46:17,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435150147] [2021-11-21 00:46:17,194 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:46:17,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:46:17,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:46:17,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:46:17,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:46:17,195 INFO L87 Difference]: Start difference. First operand 1416 states and 2123 transitions. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:19,206 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:46:26,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:26,266 INFO L93 Difference]: Finished difference Result 3660 states and 5483 transitions. [2021-11-21 00:46:26,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:46:26,266 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 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 185 [2021-11-21 00:46:26,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:26,272 INFO L225 Difference]: With dead ends: 3660 [2021-11-21 00:46:26,272 INFO L226 Difference]: Without dead ends: 2265 [2021-11-21 00:46:26,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:46:26,274 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 213 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:26,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 672 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 632 Invalid, 1 Unknown, 0 Unchecked, 8.9s Time] [2021-11-21 00:46:26,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2021-11-21 00:46:26,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 1416. [2021-11-21 00:46:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 1.4791519434628975) internal successors, (2093), 1415 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:26,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2093 transitions. [2021-11-21 00:46:26,364 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2093 transitions. Word has length 185 [2021-11-21 00:46:26,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:26,364 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 2093 transitions. [2021-11-21 00:46:26,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:26,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2093 transitions. [2021-11-21 00:46:26,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-21 00:46:26,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:26,369 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:26,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-21 00:46:26,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:46:26,584 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:26,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:26,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1602969417, now seen corresponding path program 1 times [2021-11-21 00:46:26,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:46:26,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179609132] [2021-11-21 00:46:26,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:26,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:46:26,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:46:26,587 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:46:26,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-21 00:46:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:27,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:46:27,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:27,173 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:46:27,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:46:27,350 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:46:27,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-21 00:46:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-21 00:46:27,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:46:28,140 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-21 00:46:28,140 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:46:28,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179609132] [2021-11-21 00:46:28,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179609132] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:46:28,140 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:46:28,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:46:28,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599708867] [2021-11-21 00:46:28,141 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:46:28,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:46:28,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:46:28,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:46:28,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:46:28,142 INFO L87 Difference]: Start difference. First operand 1416 states and 2093 transitions. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:30,157 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:46:35,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:35,824 INFO L93 Difference]: Finished difference Result 3852 states and 5707 transitions. [2021-11-21 00:46:35,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:46:35,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-11-21 00:46:35,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:35,828 INFO L225 Difference]: With dead ends: 3852 [2021-11-21 00:46:35,828 INFO L226 Difference]: Without dead ends: 2457 [2021-11-21 00:46:35,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:46:35,831 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 209 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:35,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 504 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 480 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2021-11-21 00:46:35,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-11-21 00:46:35,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 1512. [2021-11-21 00:46:35,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 1.4526803441429517) internal successors, (2195), 1511 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:35,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2195 transitions. [2021-11-21 00:46:35,917 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2195 transitions. Word has length 192 [2021-11-21 00:46:35,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:35,917 INFO L470 AbstractCegarLoop]: Abstraction has 1512 states and 2195 transitions. [2021-11-21 00:46:35,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:35,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2195 transitions. [2021-11-21 00:46:35,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-21 00:46:35,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:35,920 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:35,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-21 00:46:36,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:46:36,137 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:36,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:36,138 INFO L85 PathProgramCache]: Analyzing trace with hash 358080211, now seen corresponding path program 1 times [2021-11-21 00:46:36,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:46:36,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194370094] [2021-11-21 00:46:36,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:36,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:46:36,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:46:36,140 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:46:36,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-21 00:46:36,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:36,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:46:36,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:36,681 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:46:36,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:46:36,852 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:46:36,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-21 00:46:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-21 00:46:37,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:46:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-21 00:46:37,643 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:46:37,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194370094] [2021-11-21 00:46:37,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194370094] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:46:37,643 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:46:37,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:46:37,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066409226] [2021-11-21 00:46:37,644 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:46:37,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:46:37,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:46:37,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:46:37,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:46:37,645 INFO L87 Difference]: Start difference. First operand 1512 states and 2195 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) [2021-11-21 00:46:39,659 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:46:41,670 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:46:48,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:48,508 INFO L93 Difference]: Finished difference Result 3842 states and 5609 transitions. [2021-11-21 00:46:48,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:46:48,509 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 193 [2021-11-21 00:46:48,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:48,512 INFO L225 Difference]: With dead ends: 3842 [2021-11-21 00:46:48,512 INFO L226 Difference]: Without dead ends: 2351 [2021-11-21 00:46:48,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:46:48,514 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 206 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 57 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:48,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 691 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 638 Invalid, 2 Unknown, 0 Unchecked, 10.7s Time] [2021-11-21 00:46:48,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-11-21 00:46:48,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1512. [2021-11-21 00:46:48,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 1.4328259430840502) internal successors, (2165), 1511 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2165 transitions. [2021-11-21 00:46:48,621 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2165 transitions. Word has length 193 [2021-11-21 00:46:48,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:48,622 INFO L470 AbstractCegarLoop]: Abstraction has 1512 states and 2165 transitions. [2021-11-21 00:46:48,622 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) [2021-11-21 00:46:48,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2165 transitions. [2021-11-21 00:46:48,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-21 00:46:48,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:48,625 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:48,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-21 00:46:48,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:46:48,845 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:48,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:48,845 INFO L85 PathProgramCache]: Analyzing trace with hash -885263924, now seen corresponding path program 1 times [2021-11-21 00:46:48,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:46:48,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300445220] [2021-11-21 00:46:48,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:48,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:46:48,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:46:48,847 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:46:48,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-21 00:46:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:49,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:46:49,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:49,375 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:46:49,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:46:49,775 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:46:49,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-21 00:46:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-21 00:46:50,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:46:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-21 00:46:50,622 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:46:50,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300445220] [2021-11-21 00:46:50,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300445220] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:46:50,622 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:46:50,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:46:50,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535299692] [2021-11-21 00:46:50,623 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:46:50,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:46:50,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:46:50,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:46:50,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:46:50,636 INFO L87 Difference]: Start difference. First operand 1512 states and 2165 transitions. Second operand has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:52,647 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:46:58,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:58,085 INFO L93 Difference]: Finished difference Result 3980 states and 5719 transitions. [2021-11-21 00:46:58,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:46:58,091 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 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 200 [2021-11-21 00:46:58,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:58,094 INFO L225 Difference]: With dead ends: 3980 [2021-11-21 00:46:58,094 INFO L226 Difference]: Without dead ends: 2489 [2021-11-21 00:46:58,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:46:58,096 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 172 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:58,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 503 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 476 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2021-11-21 00:46:58,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2021-11-21 00:46:58,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 1710. [2021-11-21 00:46:58,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 1.4353423054417789) internal successors, (2453), 1709 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:58,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 2453 transitions. [2021-11-21 00:46:58,224 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 2453 transitions. Word has length 200 [2021-11-21 00:46:58,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:58,224 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 2453 transitions. [2021-11-21 00:46:58,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:46:58,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 2453 transitions. [2021-11-21 00:46:58,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-21 00:46:58,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:58,227 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:58,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-21 00:46:58,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:46:58,440 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:58,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:58,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1051892435, now seen corresponding path program 1 times [2021-11-21 00:46:58,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:46:58,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313155072] [2021-11-21 00:46:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:58,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:46:58,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:46:58,443 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:46:58,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-21 00:46:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:58,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:46:58,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:58,951 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:46:58,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:46:59,344 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:46:59,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-21 00:46:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-21 00:46:59,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-21 00:47:00,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:47:00,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313155072] [2021-11-21 00:47:00,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313155072] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:47:00,155 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:47:00,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:47:00,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756403551] [2021-11-21 00:47:00,155 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:47:00,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:47:00,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:47:00,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:47:00,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:47:00,157 INFO L87 Difference]: Start difference. First operand 1710 states and 2453 transitions. Second operand has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:02,179 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:47:06,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:06,896 INFO L93 Difference]: Finished difference Result 4218 states and 6091 transitions. [2021-11-21 00:47:06,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:47:06,897 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 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 201 [2021-11-21 00:47:06,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:06,900 INFO L225 Difference]: With dead ends: 4218 [2021-11-21 00:47:06,900 INFO L226 Difference]: Without dead ends: 2529 [2021-11-21 00:47:06,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:47:06,902 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 166 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:06,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 501 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 470 Invalid, 1 Unknown, 0 Unchecked, 6.5s Time] [2021-11-21 00:47:06,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2021-11-21 00:47:06,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 1776. [2021-11-21 00:47:06,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 1.4529577464788732) internal successors, (2579), 1775 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:06,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 2579 transitions. [2021-11-21 00:47:06,989 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 2579 transitions. Word has length 201 [2021-11-21 00:47:06,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:06,989 INFO L470 AbstractCegarLoop]: Abstraction has 1776 states and 2579 transitions. [2021-11-21 00:47:06,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:06,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 2579 transitions. [2021-11-21 00:47:06,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-21 00:47:06,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:06,993 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:07,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:07,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:47:07,195 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:47:07,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:07,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1389126964, now seen corresponding path program 1 times [2021-11-21 00:47:07,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:47:07,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844565868] [2021-11-21 00:47:07,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:07,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:47:07,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:47:07,198 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:47:07,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-21 00:47:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:07,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:47:07,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:07,746 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:47:07,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:47:08,139 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:47:08,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-21 00:47:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-21 00:47:08,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-21 00:47:09,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:47:09,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844565868] [2021-11-21 00:47:09,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844565868] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:47:09,022 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:47:09,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:47:09,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158068642] [2021-11-21 00:47:09,023 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:47:09,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:47:09,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:47:09,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:47:09,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:47:09,024 INFO L87 Difference]: Start difference. First operand 1776 states and 2579 transitions. Second operand has 6 states, 6 states have (on average 27.5) internal successors, (165), 6 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:11,036 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:47:17,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:17,041 INFO L93 Difference]: Finished difference Result 4488 states and 6494 transitions. [2021-11-21 00:47:17,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:47:17,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.5) internal successors, (165), 6 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-11-21 00:47:17,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:17,046 INFO L225 Difference]: With dead ends: 4488 [2021-11-21 00:47:17,046 INFO L226 Difference]: Without dead ends: 2733 [2021-11-21 00:47:17,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:47:17,049 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 172 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:17,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 660 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 618 Invalid, 1 Unknown, 0 Unchecked, 7.8s Time] [2021-11-21 00:47:17,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2021-11-21 00:47:17,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 1956. [2021-11-21 00:47:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1955 states have (on average 1.4419437340153454) internal successors, (2819), 1955 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:17,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 2819 transitions. [2021-11-21 00:47:17,180 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 2819 transitions. Word has length 206 [2021-11-21 00:47:17,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:17,181 INFO L470 AbstractCegarLoop]: Abstraction has 1956 states and 2819 transitions. [2021-11-21 00:47:17,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.5) internal successors, (165), 6 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:17,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 2819 transitions. [2021-11-21 00:47:17,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-21 00:47:17,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:17,185 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:17,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:17,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:47:17,399 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:47:17,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:17,400 INFO L85 PathProgramCache]: Analyzing trace with hash -612435472, now seen corresponding path program 1 times [2021-11-21 00:47:17,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:47:17,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [240526930] [2021-11-21 00:47:17,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:17,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:47:17,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:47:17,411 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:47:17,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-21 00:47:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:17,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:47:17,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:17,945 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:47:17,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:47:18,372 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:47:18,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-21 00:47:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-21 00:47:18,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-21 00:47:19,317 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:47:19,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [240526930] [2021-11-21 00:47:19,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [240526930] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:47:19,318 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:47:19,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:47:19,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422890030] [2021-11-21 00:47:19,318 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:47:19,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:47:19,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:47:19,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:47:19,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:47:19,320 INFO L87 Difference]: Start difference. First operand 1956 states and 2819 transitions. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:21,340 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:47:23,347 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:47:28,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:28,490 INFO L93 Difference]: Finished difference Result 4634 states and 6671 transitions. [2021-11-21 00:47:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:47:28,491 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2021-11-21 00:47:28,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:28,496 INFO L225 Difference]: With dead ends: 4634 [2021-11-21 00:47:28,496 INFO L226 Difference]: Without dead ends: 2699 [2021-11-21 00:47:28,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:47:28,499 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 168 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 57 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:28,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 519 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 479 Invalid, 2 Unknown, 0 Unchecked, 8.9s Time] [2021-11-21 00:47:28,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2021-11-21 00:47:28,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 1956. [2021-11-21 00:47:28,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1955 states have (on average 1.4327365728900257) internal successors, (2801), 1955 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 2801 transitions. [2021-11-21 00:47:28,653 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 2801 transitions. Word has length 207 [2021-11-21 00:47:28,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:28,654 INFO L470 AbstractCegarLoop]: Abstraction has 1956 states and 2801 transitions. [2021-11-21 00:47:28,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:28,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 2801 transitions. [2021-11-21 00:47:28,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-21 00:47:28,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:28,658 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:28,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:28,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:47:28,878 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:47:28,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:28,878 INFO L85 PathProgramCache]: Analyzing trace with hash 899409284, now seen corresponding path program 1 times [2021-11-21 00:47:28,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:47:28,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513575569] [2021-11-21 00:47:28,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:28,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:47:28,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:47:28,880 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:47:28,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-21 00:47:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:29,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:47:29,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:29,426 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:47:29,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:47:29,724 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:47:29,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-21 00:47:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-21 00:47:30,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-21 00:47:30,591 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:47:30,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513575569] [2021-11-21 00:47:30,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513575569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:47:30,591 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:47:30,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:47:30,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308025013] [2021-11-21 00:47:30,592 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:47:30,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:47:30,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:47:30,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:47:30,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:47:30,594 INFO L87 Difference]: Start difference. First operand 1956 states and 2801 transitions. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 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) [2021-11-21 00:47:32,613 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:47:37,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:37,695 INFO L93 Difference]: Finished difference Result 4838 states and 6906 transitions. [2021-11-21 00:47:37,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:47:37,696 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 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 209 [2021-11-21 00:47:37,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:37,723 INFO L225 Difference]: With dead ends: 4838 [2021-11-21 00:47:37,724 INFO L226 Difference]: Without dead ends: 2903 [2021-11-21 00:47:37,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:47:37,727 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 172 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:37,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 676 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 627 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2021-11-21 00:47:37,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2903 states. [2021-11-21 00:47:37,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2903 to 2124. [2021-11-21 00:47:37,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 1.418276024493641) internal successors, (3011), 2123 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:37,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 3011 transitions. [2021-11-21 00:47:37,917 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 3011 transitions. Word has length 209 [2021-11-21 00:47:37,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:37,918 INFO L470 AbstractCegarLoop]: Abstraction has 2124 states and 3011 transitions. [2021-11-21 00:47:37,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 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) [2021-11-21 00:47:37,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 3011 transitions. [2021-11-21 00:47:37,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-21 00:47:37,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:37,922 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:37,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:38,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:47:38,148 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:47:38,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:38,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1495044440, now seen corresponding path program 1 times [2021-11-21 00:47:38,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:47:38,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129145081] [2021-11-21 00:47:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:38,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:47:38,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:47:38,150 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:47:38,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-21 00:47:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:38,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:47:38,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:38,703 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:47:38,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:47:39,034 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:47:39,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-21 00:47:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-21 00:47:39,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:39,815 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-21 00:47:39,815 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:47:39,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129145081] [2021-11-21 00:47:39,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129145081] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:47:39,816 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:47:39,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:47:39,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926968063] [2021-11-21 00:47:39,816 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:47:39,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:47:39,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:47:39,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:47:39,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:47:39,817 INFO L87 Difference]: Start difference. First operand 2124 states and 3011 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:41,828 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:47:46,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:46,527 INFO L93 Difference]: Finished difference Result 4930 states and 6980 transitions. [2021-11-21 00:47:46,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:47:46,528 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 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 210 [2021-11-21 00:47:46,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:46,532 INFO L225 Difference]: With dead ends: 4930 [2021-11-21 00:47:46,532 INFO L226 Difference]: Without dead ends: 2827 [2021-11-21 00:47:46,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:47:46,535 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 160 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:46,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 635 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 583 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2021-11-21 00:47:46,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2827 states. [2021-11-21 00:47:46,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2827 to 2124. [2021-11-21 00:47:46,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 1.406971267074894) internal successors, (2987), 2123 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:46,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 2987 transitions. [2021-11-21 00:47:46,761 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 2987 transitions. Word has length 210 [2021-11-21 00:47:46,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:46,763 INFO L470 AbstractCegarLoop]: Abstraction has 2124 states and 2987 transitions. [2021-11-21 00:47:46,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:46,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 2987 transitions. [2021-11-21 00:47:46,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-21 00:47:46,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:46,767 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:46,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-21 00:47:46,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:47:46,984 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:47:46,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:46,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1940297028, now seen corresponding path program 1 times [2021-11-21 00:47:46,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:47:46,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353843416] [2021-11-21 00:47:46,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:46,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:47:46,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:47:46,986 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:47:46,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-21 00:47:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:47,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:47:47,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:47,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:47:47,661 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:47:47,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-21 00:47:48,085 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:47:48,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-21 00:47:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-21 00:47:48,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-21 00:47:48,602 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:47:48,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353843416] [2021-11-21 00:47:48,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353843416] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:47:48,602 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:47:48,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-21 00:47:48,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937427913] [2021-11-21 00:47:48,603 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:47:48,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:47:48,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:47:48,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:47:48,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:47:48,605 INFO L87 Difference]: Start difference. First operand 2124 states and 2987 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:50,619 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:47:52,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:52,231 INFO L93 Difference]: Finished difference Result 4579 states and 6420 transitions. [2021-11-21 00:47:52,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:47:52,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 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 222 [2021-11-21 00:47:52,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:52,238 INFO L225 Difference]: With dead ends: 4579 [2021-11-21 00:47:52,238 INFO L226 Difference]: Without dead ends: 2476 [2021-11-21 00:47:52,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 438 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:47:52,241 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 60 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:52,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 545 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-11-21 00:47:52,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2021-11-21 00:47:52,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 2380. [2021-11-21 00:47:52,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2379 states have (on average 1.403530895334174) internal successors, (3339), 2379 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:52,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 3339 transitions. [2021-11-21 00:47:52,408 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 3339 transitions. Word has length 222 [2021-11-21 00:47:52,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:52,408 INFO L470 AbstractCegarLoop]: Abstraction has 2380 states and 3339 transitions. [2021-11-21 00:47:52,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:52,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 3339 transitions. [2021-11-21 00:47:52,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-21 00:47:52,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:52,412 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:52,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:52,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:47:52,613 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:47:52,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:52,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1457276990, now seen corresponding path program 1 times [2021-11-21 00:47:52,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:47:52,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887609053] [2021-11-21 00:47:52,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:52,615 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:47:52,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:47:52,615 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:47:52,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-21 00:47:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:52,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:47:53,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:53,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:47:53,311 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:47:53,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-21 00:47:53,544 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:47:53,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-21 00:47:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-21 00:47:53,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-21 00:47:54,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:47:54,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887609053] [2021-11-21 00:47:54,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887609053] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:47:54,021 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:47:54,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-21 00:47:54,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931513245] [2021-11-21 00:47:54,021 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:47:54,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:47:54,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:47:54,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:47:54,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:47:54,022 INFO L87 Difference]: Start difference. First operand 2380 states and 3339 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 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) [2021-11-21 00:47:56,036 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:47:58,056 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:48:00,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:48:00,394 INFO L93 Difference]: Finished difference Result 4855 states and 6800 transitions. [2021-11-21 00:48:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:48:00,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 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 222 [2021-11-21 00:48:00,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:48:00,402 INFO L225 Difference]: With dead ends: 4855 [2021-11-21 00:48:00,402 INFO L226 Difference]: Without dead ends: 2496 [2021-11-21 00:48:00,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 438 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:48:00,405 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 15 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:48:00,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 620 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 250 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2021-11-21 00:48:00,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-11-21 00:48:00,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2476. [2021-11-21 00:48:00,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2475 states have (on average 1.3975757575757575) internal successors, (3459), 2475 states have internal predecessors, (3459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:48:00,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 3459 transitions. [2021-11-21 00:48:00,567 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 3459 transitions. Word has length 222 [2021-11-21 00:48:00,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:48:00,568 INFO L470 AbstractCegarLoop]: Abstraction has 2476 states and 3459 transitions. [2021-11-21 00:48:00,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 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) [2021-11-21 00:48:00,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 3459 transitions. [2021-11-21 00:48:00,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-21 00:48:00,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:48:00,572 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:48:00,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-21 00:48:00,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:48:00,789 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:48:00,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:48:00,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1989337734, now seen corresponding path program 1 times [2021-11-21 00:48:00,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:48:00,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979515527] [2021-11-21 00:48:00,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:48:00,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:48:00,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:48:00,791 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:48:00,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-21 00:48:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:48:01,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:48:01,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:48:01,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:48:01,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-21 00:48:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2021-11-21 00:48:01,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:48:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2021-11-21 00:48:01,995 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:48:01,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979515527] [2021-11-21 00:48:01,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979515527] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:48:01,995 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:48:01,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:48:01,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493033501] [2021-11-21 00:48:01,996 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:48:01,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:48:01,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:48:01,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:48:01,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:48:01,997 INFO L87 Difference]: Start difference. First operand 2476 states and 3459 transitions. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:48:04,009 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:48:09,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:48:09,257 INFO L93 Difference]: Finished difference Result 5866 states and 8175 transitions. [2021-11-21 00:48:09,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:48:09,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 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 236 [2021-11-21 00:48:09,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:48:09,262 INFO L225 Difference]: With dead ends: 5866 [2021-11-21 00:48:09,263 INFO L226 Difference]: Without dead ends: 3411 [2021-11-21 00:48:09,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:48:09,266 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 141 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:48:09,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 599 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 568 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2021-11-21 00:48:09,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-11-21 00:48:09,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2700. [2021-11-21 00:48:09,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2700 states, 2699 states have (on average 1.4008892182289736) internal successors, (3781), 2699 states have internal predecessors, (3781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:48:09,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 3781 transitions. [2021-11-21 00:48:09,399 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 3781 transitions. Word has length 236 [2021-11-21 00:48:09,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:48:09,404 INFO L470 AbstractCegarLoop]: Abstraction has 2700 states and 3781 transitions. [2021-11-21 00:48:09,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:48:09,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 3781 transitions. [2021-11-21 00:48:09,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-21 00:48:09,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:48:09,409 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:48:09,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-21 00:48:09,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:48:09,619 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:48:09,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:48:09,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1532743095, now seen corresponding path program 1 times [2021-11-21 00:48:09,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:48:09,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [856966464] [2021-11-21 00:48:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:48:09,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:48:09,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:48:09,622 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:48:09,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-21 00:48:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:48:09,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:48:09,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:48:10,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:48:10,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-21 00:48:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2021-11-21 00:48:10,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:48:10,899 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2021-11-21 00:48:10,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:48:10,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [856966464] [2021-11-21 00:48:10,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [856966464] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:48:10,900 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:48:10,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:48:10,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436488271] [2021-11-21 00:48:10,900 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:48:10,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:48:10,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:48:10,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:48:10,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:48:10,902 INFO L87 Difference]: Start difference. First operand 2700 states and 3781 transitions. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:48:12,920 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:48:18,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:48:18,246 INFO L93 Difference]: Finished difference Result 6113 states and 8553 transitions. [2021-11-21 00:48:18,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:48:18,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 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 237 [2021-11-21 00:48:18,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:48:18,250 INFO L225 Difference]: With dead ends: 6113 [2021-11-21 00:48:18,250 INFO L226 Difference]: Without dead ends: 3410 [2021-11-21 00:48:18,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:48:18,253 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 135 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:48:18,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 590 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 564 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2021-11-21 00:48:18,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2021-11-21 00:48:18,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 2739. [2021-11-21 00:48:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2738 states have (on average 1.4075967859751644) internal successors, (3854), 2738 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:48:18,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 3854 transitions. [2021-11-21 00:48:18,472 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 3854 transitions. Word has length 237 [2021-11-21 00:48:18,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:48:18,473 INFO L470 AbstractCegarLoop]: Abstraction has 2739 states and 3854 transitions. [2021-11-21 00:48:18,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:48:18,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 3854 transitions. [2021-11-21 00:48:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-21 00:48:18,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:48:18,478 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:48:18,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-21 00:48:18,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:48:18,703 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:48:18,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:48:18,703 INFO L85 PathProgramCache]: Analyzing trace with hash 350204006, now seen corresponding path program 1 times [2021-11-21 00:48:18,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:48:18,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273589575] [2021-11-21 00:48:18,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:48:18,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:48:18,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:48:18,705 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:48:18,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d449ca9e-aa08-4398-91af-41425d573fc7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-21 00:48:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:48:20,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-21 00:48:20,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:48:20,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 2106 treesize of output 2099 [2021-11-21 00:48:20,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:48:20,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2144 treesize of output 2084 [2021-11-21 00:48:20,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 2588 treesize of output 2418 [2021-11-21 00:48:20,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:20,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 2238 treesize of output 2050 [2021-11-21 00:48:53,328 WARN L227 SmtUtils]: Spent 32.81s on a formula simplification. DAG size of input: 31 DAG size of output: 9 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 00:48:53,328 INFO L354 Elim1Store]: treesize reduction 58, result has 15.9 percent of original size [2021-11-21 00:48:53,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 2335 treesize of output 2176 [2021-11-21 00:51:33,457 WARN L227 SmtUtils]: Spent 2.67m on a formula simplification. DAG size of input: 92 DAG size of output: 55 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 00:51:33,458 INFO L354 Elim1Store]: treesize reduction 469, result has 22.0 percent of original size [2021-11-21 00:51:33,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 2274 treesize of output 2303 [2021-11-21 00:51:33,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2445 treesize of output 2319 [2021-11-21 00:51:33,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 3964 treesize of output 3436 [2021-11-21 00:51:33,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:33,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 21 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 2452 treesize of output 2376 [2021-11-21 00:51:33,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2340 treesize of output 2338 [2021-11-21 00:51:33,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2333 treesize of output 2323 [2021-11-21 00:51:33,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2326 treesize of output 2318 [2021-11-21 00:51:34,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:34,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:34,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:34,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:34,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:34,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:34,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:34,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:34,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:46,931 WARN L227 SmtUtils]: Spent 12.89s on a formula simplification. DAG size of input: 96 DAG size of output: 39 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 00:51:46,932 INFO L354 Elim1Store]: treesize reduction 416, result has 16.3 percent of original size [2021-11-21 00:51:46,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 2319 treesize of output 2285 [2021-11-21 00:51:51,769 INFO L354 Elim1Store]: treesize reduction 483, result has 9.4 percent of original size [2021-11-21 00:51:51,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 2475 treesize of output 2467 [2021-11-21 00:51:52,110 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-21 00:51:52,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13928 treesize of output 13918 [2021-11-21 00:51:52,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13907 treesize of output 13906 [2021-11-21 00:51:55,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:51:55,165 INFO L244 Elim1Store]: Index analysis took 183 ms [2021-11-21 00:51:55,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 156 [2021-11-21 00:51:55,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-21 00:51:56,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 00:51:58,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:58,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:58,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:58,874 INFO L244 Elim1Store]: Index analysis took 334 ms [2021-11-21 00:51:59,478 INFO L354 Elim1Store]: treesize reduction 108, result has 0.9 percent of original size [2021-11-21 00:51:59,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 98 treesize of output 54 [2021-11-21 00:52:00,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:00,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:00,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:00,645 INFO L244 Elim1Store]: Index analysis took 416 ms [2021-11-21 00:52:00,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:00,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:00,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:00,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:52:00,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 74 treesize of output 42 [2021-11-21 00:52:01,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:01,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:01,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:01,708 INFO L244 Elim1Store]: Index analysis took 168 ms [2021-11-21 00:52:01,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 58 [2021-11-21 00:52:05,189 INFO L244 Elim1Store]: Index analysis took 114 ms [2021-11-21 00:52:05,818 INFO L354 Elim1Store]: treesize reduction 41, result has 16.3 percent of original size [2021-11-21 00:52:05,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 306 treesize of output 250 [2021-11-21 00:52:07,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-21 00:52:08,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-11-21 00:52:11,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:11,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:11,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:11,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:11,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:11,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:11,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:11,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:11,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:11,405 INFO L190 IndexEqualityManager]: detected not equals via solver