./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db11ee3e-9b4a-4bb0-8c33-84078a6fff0b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db11ee3e-9b4a-4bb0-8c33-84078a6fff0b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db11ee3e-9b4a-4bb0-8c33-84078a6fff0b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db11ee3e-9b4a-4bb0-8c33-84078a6fff0b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db11ee3e-9b4a-4bb0-8c33-84078a6fff0b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db11ee3e-9b4a-4bb0-8c33-84078a6fff0b/bin/utaipan-vmNK8stdcF --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 7539b1e5f39ef0b663906f618cec169c1b82b84e2b7e5d0166bd24e138434223 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:49:39,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:49:39,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:49:39,299 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:49:39,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:49:39,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:49:39,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:49:39,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:49:39,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:49:39,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:49:39,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:49:39,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:49:39,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:49:39,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:49:39,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:49:39,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:49:39,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:49:39,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:49:39,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:49:39,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:49:39,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:49:39,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:49:39,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:49:39,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:49:39,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:49:39,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:49:39,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:49:39,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:49:39,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:49:39,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:49:39,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:49:39,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:49:39,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:49:39,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:49:39,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:49:39,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:49:39,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:49:39,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:49:39,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:49:39,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:49:39,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:49:39,383 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db11ee3e-9b4a-4bb0-8c33-84078a6fff0b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:49:39,428 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:49:39,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:49:39,430 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:49:39,430 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:49:39,430 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:49:39,430 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:49:39,431 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:49:39,431 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:49:39,431 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:49:39,431 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:49:39,432 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:49:39,432 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:49:39,433 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:49:39,433 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:49:39,433 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:49:39,433 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:49:39,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:49:39,434 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:49:39,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:49:39,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:49:39,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:49:39,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:49:39,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:49:39,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:49:39,436 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:49:39,436 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:49:39,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:49:39,437 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:49:39,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:49:39,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:49:39,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:49:39,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:49:39,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:49:39,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:49:39,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:49:39,440 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:49:39,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:49:39,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:49:39,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:49:39,440 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:49:39,441 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_db11ee3e-9b4a-4bb0-8c33-84078a6fff0b/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db11ee3e-9b4a-4bb0-8c33-84078a6fff0b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7539b1e5f39ef0b663906f618cec169c1b82b84e2b7e5d0166bd24e138434223 [2021-11-12 22:49:39,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:49:39,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:49:39,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:49:39,777 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:49:39,777 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:49:39,778 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db11ee3e-9b4a-4bb0-8c33-84078a6fff0b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-11-12 22:49:39,837 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db11ee3e-9b4a-4bb0-8c33-84078a6fff0b/bin/utaipan-vmNK8stdcF/data/c153a9b93/7f1c1d74d54c40399e043cea00660ad8/FLAGd22c5b324 [2021-11-12 22:49:40,494 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:49:40,495 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db11ee3e-9b4a-4bb0-8c33-84078a6fff0b/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-11-12 22:49:40,516 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db11ee3e-9b4a-4bb0-8c33-84078a6fff0b/bin/utaipan-vmNK8stdcF/data/c153a9b93/7f1c1d74d54c40399e043cea00660ad8/FLAGd22c5b324 [2021-11-12 22:49:40,678 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db11ee3e-9b4a-4bb0-8c33-84078a6fff0b/bin/utaipan-vmNK8stdcF/data/c153a9b93/7f1c1d74d54c40399e043cea00660ad8 [2021-11-12 22:49:40,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:49:40,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:49:40,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:49:40,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:49:40,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:49:40,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:49:40" (1/1) ... [2021-11-12 22:49:40,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41c2003b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:40, skipping insertion in model container [2021-11-12 22:49:40,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:49:40" (1/1) ... [2021-11-12 22:49:40,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:49:40,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:49:41,266 WARN L228 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_db11ee3e-9b4a-4bb0-8c33-84078a6fff0b/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[23233,23246] [2021-11-12 22:49:41,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:49:41,521 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:49:41,808 WARN L228 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_db11ee3e-9b4a-4bb0-8c33-84078a6fff0b/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[23233,23246] [2021-11-12 22:49:41,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:49:41,957 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:49:41,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41 WrapperNode [2021-11-12 22:49:41,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:49:41,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:49:41,959 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:49:41,959 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:49:41,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:42,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:42,165 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:49:42,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:49:42,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:49:42,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:49:42,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:42,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:42,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:42,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:42,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:42,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:42,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:42,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:49:42,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:49:42,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:49:42,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:49:42,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (1/1) ... [2021-11-12 22:49:42,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:49:42,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db11ee3e-9b4a-4bb0-8c33-84078a6fff0b/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:49:42,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db11ee3e-9b4a-4bb0-8c33-84078a6fff0b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:49:42,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db11ee3e-9b4a-4bb0-8c33-84078a6fff0b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:49:42,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:49:42,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:49:42,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:49:42,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:49:45,374 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:49:45,374 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 22:49:45,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:49:45 BoogieIcfgContainer [2021-11-12 22:49:45,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:49:45,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:49:45,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:49:45,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:49:45,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:49:40" (1/3) ... [2021-11-12 22:49:45,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487271ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:49:45, skipping insertion in model container [2021-11-12 22:49:45,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:41" (2/3) ... [2021-11-12 22:49:45,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487271ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:49:45, skipping insertion in model container [2021-11-12 22:49:45,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:49:45" (3/3) ... [2021-11-12 22:49:45,389 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-11-12 22:49:45,397 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:49:45,398 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:49:45,469 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:49:45,480 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 [2021-11-12 22:49:45,480 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:49:45,518 INFO L276 IsEmpty]: Start isEmpty. Operand has 647 states, 645 states have (on average 1.7302325581395348) internal successors, (1116), 646 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:45,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-12 22:49:45,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:45,574 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:49:45,574 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:49:45,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:49:45,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1415635360, now seen corresponding path program 1 times [2021-11-12 22:49:45,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:49:45,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101390005] [2021-11-12 22:49:45,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:45,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:49:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:49:46,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:49:46,426 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:49:46,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101390005] [2021-11-12 22:49:46,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101390005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:49:46,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:49:46,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:49:46,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399922572] [2021-11-12 22:49:46,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:49:46,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:49:46,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:49:46,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:49:46,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:46,471 INFO L87 Difference]: Start difference. First operand has 647 states, 645 states have (on average 1.7302325581395348) internal successors, (1116), 646 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:46,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:49:46,844 INFO L93 Difference]: Finished difference Result 941 states and 1599 transitions. [2021-11-12 22:49:46,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:49:46,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 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 202 [2021-11-12 22:49:46,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:49:46,877 INFO L225 Difference]: With dead ends: 941 [2021-11-12 22:49:46,877 INFO L226 Difference]: Without dead ends: 777 [2021-11-12 22:49:46,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:46,889 INFO L933 BasicCegarLoop]: 1255 mSDtfsCounter, 269 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 184.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 2236 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.69ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 226.28ms IncrementalHoareTripleChecker+Time [2021-11-12 22:49:46,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 2236 Invalid, 146 Unknown, 0 Unchecked, 24.69ms Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 226.28ms Time] [2021-11-12 22:49:46,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-11-12 22:49:47,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 775. [2021-11-12 22:49:47,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 1.6304909560723515) internal successors, (1262), 774 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:47,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1262 transitions. [2021-11-12 22:49:47,016 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1262 transitions. Word has length 202 [2021-11-12 22:49:47,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:49:47,019 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 1262 transitions. [2021-11-12 22:49:47,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:47,021 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1262 transitions. [2021-11-12 22:49:47,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-12 22:49:47,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:47,033 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:49:47,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:49:47,035 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:49:47,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:49:47,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1248854014, now seen corresponding path program 1 times [2021-11-12 22:49:47,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:49:47,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141578538] [2021-11-12 22:49:47,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:47,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:49:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:49:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:49:47,311 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:49:47,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141578538] [2021-11-12 22:49:47,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141578538] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:49:47,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:49:47,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:49:47,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146112747] [2021-11-12 22:49:47,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:49:47,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:49:47,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:49:47,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:49:47,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:47,318 INFO L87 Difference]: Start difference. First operand 775 states and 1262 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:47,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:49:47,609 INFO L93 Difference]: Finished difference Result 1222 states and 1997 transitions. [2021-11-12 22:49:47,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:49:47,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 204 [2021-11-12 22:49:47,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:49:47,619 INFO L225 Difference]: With dead ends: 1222 [2021-11-12 22:49:47,619 INFO L226 Difference]: Without dead ends: 934 [2021-11-12 22:49:47,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:47,631 INFO L933 BasicCegarLoop]: 976 mSDtfsCounter, 251 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 207.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1897 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.60ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 244.38ms IncrementalHoareTripleChecker+Time [2021-11-12 22:49:47,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 1897 Invalid, 149 Unknown, 0 Unchecked, 5.60ms Time], IncrementalHoareTripleChecker [3 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 244.38ms Time] [2021-11-12 22:49:47,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-11-12 22:49:47,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 932. [2021-11-12 22:49:47,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 1.6294307196562836) internal successors, (1517), 931 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1517 transitions. [2021-11-12 22:49:47,685 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1517 transitions. Word has length 204 [2021-11-12 22:49:47,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:49:47,689 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 1517 transitions. [2021-11-12 22:49:47,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:47,691 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1517 transitions. [2021-11-12 22:49:47,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-12 22:49:47,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:47,698 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:49:47,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 22:49:47,699 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:49:47,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:49:47,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1388078531, now seen corresponding path program 1 times [2021-11-12 22:49:47,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:49:47,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857809178] [2021-11-12 22:49:47,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:47,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:49:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:49:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:49:47,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:49:47,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857809178] [2021-11-12 22:49:47,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857809178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:49:47,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:49:47,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:49:47,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030063815] [2021-11-12 22:49:47,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:49:47,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:49:47,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:49:47,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:49:47,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:47,918 INFO L87 Difference]: Start difference. First operand 932 states and 1517 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:48,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:49:48,176 INFO L93 Difference]: Finished difference Result 1740 states and 2844 transitions. [2021-11-12 22:49:48,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:49:48,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 208 [2021-11-12 22:49:48,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:49:48,219 INFO L225 Difference]: With dead ends: 1740 [2021-11-12 22:49:48,219 INFO L226 Difference]: Without dead ends: 1297 [2021-11-12 22:49:48,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:48,228 INFO L933 BasicCegarLoop]: 1138 mSDtfsCounter, 249 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 163.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.57ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 201.45ms IncrementalHoareTripleChecker+Time [2021-11-12 22:49:48,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 2064 Invalid, 142 Unknown, 0 Unchecked, 5.57ms Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 201.45ms Time] [2021-11-12 22:49:48,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-11-12 22:49:48,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1295. [2021-11-12 22:49:48,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 1.6321483771251932) internal successors, (2112), 1294 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:48,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 2112 transitions. [2021-11-12 22:49:48,286 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 2112 transitions. Word has length 208 [2021-11-12 22:49:48,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:49:48,287 INFO L470 AbstractCegarLoop]: Abstraction has 1295 states and 2112 transitions. [2021-11-12 22:49:48,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:48,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 2112 transitions. [2021-11-12 22:49:48,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-12 22:49:48,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:48,292 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:49:48,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 22:49:48,292 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:49:48,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:49:48,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1780624144, now seen corresponding path program 1 times [2021-11-12 22:49:48,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:49:48,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470009716] [2021-11-12 22:49:48,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:48,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:49:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:49:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:49:48,456 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:49:48,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470009716] [2021-11-12 22:49:48,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470009716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:49:48,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:49:48,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:49:48,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938063725] [2021-11-12 22:49:48,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:49:48,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:49:48,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:49:48,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:49:48,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:48,459 INFO L87 Difference]: Start difference. First operand 1295 states and 2112 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:48,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:49:48,704 INFO L93 Difference]: Finished difference Result 2572 states and 4207 transitions. [2021-11-12 22:49:48,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:49:48,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 [2021-11-12 22:49:48,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:49:48,718 INFO L225 Difference]: With dead ends: 2572 [2021-11-12 22:49:48,718 INFO L226 Difference]: Without dead ends: 1766 [2021-11-12 22:49:48,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:48,728 INFO L933 BasicCegarLoop]: 985 mSDtfsCounter, 248 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 142.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.14ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 170.89ms IncrementalHoareTripleChecker+Time [2021-11-12 22:49:48,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 1913 Invalid, 137 Unknown, 0 Unchecked, 5.14ms Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 170.89ms Time] [2021-11-12 22:49:48,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-11-12 22:49:48,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1764. [2021-11-12 22:49:48,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 1.6335791264889392) internal successors, (2880), 1763 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:48,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 2880 transitions. [2021-11-12 22:49:48,838 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 2880 transitions. Word has length 210 [2021-11-12 22:49:48,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:49:48,839 INFO L470 AbstractCegarLoop]: Abstraction has 1764 states and 2880 transitions. [2021-11-12 22:49:48,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 2880 transitions. [2021-11-12 22:49:48,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-12 22:49:48,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:48,843 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:49:48,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 22:49:48,844 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:49:48,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:49:48,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1676151147, now seen corresponding path program 1 times [2021-11-12 22:49:48,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:49:48,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384471625] [2021-11-12 22:49:48,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:48,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:49:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:49:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:49:49,019 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:49:49,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384471625] [2021-11-12 22:49:49,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384471625] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:49:49,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:49:49,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:49:49,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116572475] [2021-11-12 22:49:49,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:49:49,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:49:49,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:49:49,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:49:49,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:49,022 INFO L87 Difference]: Start difference. First operand 1764 states and 2880 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 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) [2021-11-12 22:49:49,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:49:49,397 INFO L93 Difference]: Finished difference Result 4024 states and 6587 transitions. [2021-11-12 22:49:49,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:49:49,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 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) Word has length 214 [2021-11-12 22:49:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:49:49,418 INFO L225 Difference]: With dead ends: 4024 [2021-11-12 22:49:49,419 INFO L226 Difference]: Without dead ends: 2777 [2021-11-12 22:49:49,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:49,424 INFO L933 BasicCegarLoop]: 1093 mSDtfsCounter, 241 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 166.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 2020 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.57ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 202.91ms IncrementalHoareTripleChecker+Time [2021-11-12 22:49:49,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 2020 Invalid, 142 Unknown, 0 Unchecked, 5.57ms Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 202.91ms Time] [2021-11-12 22:49:49,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2021-11-12 22:49:49,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 2775. [2021-11-12 22:49:49,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 1.6330209084354723) internal successors, (4530), 2774 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:49,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 4530 transitions. [2021-11-12 22:49:49,622 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 4530 transitions. Word has length 214 [2021-11-12 22:49:49,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:49:49,627 INFO L470 AbstractCegarLoop]: Abstraction has 2775 states and 4530 transitions. [2021-11-12 22:49:49,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 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) [2021-11-12 22:49:49,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 4530 transitions. [2021-11-12 22:49:49,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-12 22:49:49,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:49,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:49:49,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 22:49:49,632 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:49:49,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:49:49,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1687278263, now seen corresponding path program 1 times [2021-11-12 22:49:49,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:49:49,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706640894] [2021-11-12 22:49:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:49,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:49:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:49:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:49:49,817 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:49:49,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706640894] [2021-11-12 22:49:49,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706640894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:49:49,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:49:49,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:49:49,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208209217] [2021-11-12 22:49:49,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:49:49,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:49:49,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:49:49,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:49:49,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:49,820 INFO L87 Difference]: Start difference. First operand 2775 states and 4530 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 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) [2021-11-12 22:49:50,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:49:50,188 INFO L93 Difference]: Finished difference Result 6308 states and 10318 transitions. [2021-11-12 22:49:50,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:49:50,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 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) Word has length 216 [2021-11-12 22:49:50,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:49:50,215 INFO L225 Difference]: With dead ends: 6308 [2021-11-12 22:49:50,215 INFO L226 Difference]: Without dead ends: 4050 [2021-11-12 22:49:50,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:50,223 INFO L933 BasicCegarLoop]: 986 mSDtfsCounter, 240 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 142.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1915 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.29ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 172.16ms IncrementalHoareTripleChecker+Time [2021-11-12 22:49:50,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 1915 Invalid, 137 Unknown, 0 Unchecked, 5.29ms Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 172.16ms Time] [2021-11-12 22:49:50,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4050 states. [2021-11-12 22:49:50,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4050 to 4048. [2021-11-12 22:49:50,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4048 states, 4047 states have (on average 1.633555720286632) internal successors, (6611), 4047 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:50,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4048 states to 4048 states and 6611 transitions. [2021-11-12 22:49:50,478 INFO L78 Accepts]: Start accepts. Automaton has 4048 states and 6611 transitions. Word has length 216 [2021-11-12 22:49:50,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:49:50,479 INFO L470 AbstractCegarLoop]: Abstraction has 4048 states and 6611 transitions. [2021-11-12 22:49:50,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 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) [2021-11-12 22:49:50,479 INFO L276 IsEmpty]: Start isEmpty. Operand 4048 states and 6611 transitions. [2021-11-12 22:49:50,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-12 22:49:50,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:50,484 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:49:50,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 22:49:50,484 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:49:50,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:49:50,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1054176882, now seen corresponding path program 1 times [2021-11-12 22:49:50,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:49:50,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748967591] [2021-11-12 22:49:50,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:50,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:49:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:49:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:49:50,626 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:49:50,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748967591] [2021-11-12 22:49:50,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748967591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:49:50,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:49:50,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:49:50,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839305386] [2021-11-12 22:49:50,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:49:50,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:49:50,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:49:50,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:49:50,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:50,629 INFO L87 Difference]: Start difference. First operand 4048 states and 6611 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 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) [2021-11-12 22:49:51,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:49:51,201 INFO L93 Difference]: Finished difference Result 10352 states and 16918 transitions. [2021-11-12 22:49:51,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:49:51,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 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) Word has length 220 [2021-11-12 22:49:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:49:51,250 INFO L225 Difference]: With dead ends: 10352 [2021-11-12 22:49:51,250 INFO L226 Difference]: Without dead ends: 6849 [2021-11-12 22:49:51,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:51,259 INFO L933 BasicCegarLoop]: 1048 mSDtfsCounter, 233 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 156.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1976 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.42ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 187.01ms IncrementalHoareTripleChecker+Time [2021-11-12 22:49:51,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 1976 Invalid, 142 Unknown, 0 Unchecked, 5.42ms Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 187.01ms Time] [2021-11-12 22:49:51,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6849 states. [2021-11-12 22:49:51,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6849 to 6847. [2021-11-12 22:49:51,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6847 states, 6846 states have (on average 1.6295647093193106) internal successors, (11156), 6846 states have internal predecessors, (11156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:51,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6847 states to 6847 states and 11156 transitions. [2021-11-12 22:49:51,713 INFO L78 Accepts]: Start accepts. Automaton has 6847 states and 11156 transitions. Word has length 220 [2021-11-12 22:49:51,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:49:51,714 INFO L470 AbstractCegarLoop]: Abstraction has 6847 states and 11156 transitions. [2021-11-12 22:49:51,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 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) [2021-11-12 22:49:51,715 INFO L276 IsEmpty]: Start isEmpty. Operand 6847 states and 11156 transitions. [2021-11-12 22:49:51,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-12 22:49:51,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:51,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:49:51,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 22:49:51,720 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:49:51,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:49:51,720 INFO L85 PathProgramCache]: Analyzing trace with hash 773789558, now seen corresponding path program 1 times [2021-11-12 22:49:51,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:49:51,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834650779] [2021-11-12 22:49:51,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:51,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:49:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:49:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:49:51,842 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:49:51,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834650779] [2021-11-12 22:49:51,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834650779] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:49:51,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:49:51,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:49:51,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081014305] [2021-11-12 22:49:51,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:49:51,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:49:51,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:49:51,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:49:51,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:51,846 INFO L87 Difference]: Start difference. First operand 6847 states and 11156 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:52,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:49:52,661 INFO L93 Difference]: Finished difference Result 16680 states and 27213 transitions. [2021-11-12 22:49:52,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:49:52,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 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 [2021-11-12 22:49:52,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:49:52,723 INFO L225 Difference]: With dead ends: 16680 [2021-11-12 22:49:52,724 INFO L226 Difference]: Without dead ends: 10378 [2021-11-12 22:49:52,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:52,740 INFO L933 BasicCegarLoop]: 987 mSDtfsCounter, 232 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 151.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1917 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.54ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 181.29ms IncrementalHoareTripleChecker+Time [2021-11-12 22:49:52,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 1917 Invalid, 137 Unknown, 0 Unchecked, 5.54ms Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 181.29ms Time] [2021-11-12 22:49:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10378 states. [2021-11-12 22:49:53,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10378 to 10376. [2021-11-12 22:49:53,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10376 states, 10375 states have (on average 1.6294939759036144) internal successors, (16906), 10375 states have internal predecessors, (16906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:53,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10376 states to 10376 states and 16906 transitions. [2021-11-12 22:49:53,346 INFO L78 Accepts]: Start accepts. Automaton has 10376 states and 16906 transitions. Word has length 222 [2021-11-12 22:49:53,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:49:53,347 INFO L470 AbstractCegarLoop]: Abstraction has 10376 states and 16906 transitions. [2021-11-12 22:49:53,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:53,348 INFO L276 IsEmpty]: Start isEmpty. Operand 10376 states and 16906 transitions. [2021-11-12 22:49:53,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-12 22:49:53,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:53,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:49:53,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 22:49:53,353 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:49:53,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:49:53,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1910534011, now seen corresponding path program 1 times [2021-11-12 22:49:53,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:49:53,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899833620] [2021-11-12 22:49:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:53,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:49:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:49:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:49:53,504 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:49:53,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899833620] [2021-11-12 22:49:53,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899833620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:49:53,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:49:53,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:49:53,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541658243] [2021-11-12 22:49:53,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:49:53,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:49:53,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:49:53,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:49:53,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:53,508 INFO L87 Difference]: Start difference. First operand 10376 states and 16906 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:54,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:49:54,566 INFO L93 Difference]: Finished difference Result 27876 states and 45393 transitions. [2021-11-12 22:49:54,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:49:54,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 226 [2021-11-12 22:49:54,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:49:54,639 INFO L225 Difference]: With dead ends: 27876 [2021-11-12 22:49:54,640 INFO L226 Difference]: Without dead ends: 18073 [2021-11-12 22:49:54,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:54,658 INFO L933 BasicCegarLoop]: 1003 mSDtfsCounter, 225 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 154.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1932 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.21ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 188.78ms IncrementalHoareTripleChecker+Time [2021-11-12 22:49:54,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 1932 Invalid, 142 Unknown, 0 Unchecked, 5.21ms Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 188.78ms Time] [2021-11-12 22:49:54,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18073 states. [2021-11-12 22:49:55,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18073 to 18071. [2021-11-12 22:49:55,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18071 states, 18070 states have (on average 1.6229109020475927) internal successors, (29326), 18070 states have internal predecessors, (29326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:55,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18071 states to 18071 states and 29326 transitions. [2021-11-12 22:49:55,823 INFO L78 Accepts]: Start accepts. Automaton has 18071 states and 29326 transitions. Word has length 226 [2021-11-12 22:49:55,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:49:55,823 INFO L470 AbstractCegarLoop]: Abstraction has 18071 states and 29326 transitions. [2021-11-12 22:49:55,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:55,824 INFO L276 IsEmpty]: Start isEmpty. Operand 18071 states and 29326 transitions. [2021-11-12 22:49:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-12 22:49:55,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:55,829 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:49:55,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 22:49:55,830 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:49:55,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:49:55,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1949588688, now seen corresponding path program 1 times [2021-11-12 22:49:55,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:49:55,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037347342] [2021-11-12 22:49:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:55,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:49:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:49:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:49:55,961 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:49:55,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037347342] [2021-11-12 22:49:55,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037347342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:49:55,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:49:55,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:49:55,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867849483] [2021-11-12 22:49:55,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:49:55,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:49:55,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:49:55,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:49:55,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:55,964 INFO L87 Difference]: Start difference. First operand 18071 states and 29326 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:57,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:49:57,444 INFO L93 Difference]: Finished difference Result 45400 states and 73760 transitions. [2021-11-12 22:49:57,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:49:57,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 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 228 [2021-11-12 22:49:57,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:49:57,543 INFO L225 Difference]: With dead ends: 45400 [2021-11-12 22:49:57,544 INFO L226 Difference]: Without dead ends: 27902 [2021-11-12 22:49:57,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:57,577 INFO L933 BasicCegarLoop]: 988 mSDtfsCounter, 224 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 138.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.13ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 165.80ms IncrementalHoareTripleChecker+Time [2021-11-12 22:49:57,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 1919 Invalid, 137 Unknown, 0 Unchecked, 5.13ms Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 165.80ms Time] [2021-11-12 22:49:57,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27902 states. [2021-11-12 22:49:58,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27902 to 27900. [2021-11-12 22:49:58,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27900 states, 27899 states have (on average 1.6227463349940858) internal successors, (45273), 27899 states have internal predecessors, (45273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:59,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27900 states to 27900 states and 45273 transitions. [2021-11-12 22:49:59,073 INFO L78 Accepts]: Start accepts. Automaton has 27900 states and 45273 transitions. Word has length 228 [2021-11-12 22:49:59,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:49:59,073 INFO L470 AbstractCegarLoop]: Abstraction has 27900 states and 45273 transitions. [2021-11-12 22:49:59,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:59,074 INFO L276 IsEmpty]: Start isEmpty. Operand 27900 states and 45273 transitions. [2021-11-12 22:49:59,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-12 22:49:59,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:59,078 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:49:59,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 22:49:59,079 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:49:59,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:49:59,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1283826795, now seen corresponding path program 1 times [2021-11-12 22:49:59,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:49:59,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677465742] [2021-11-12 22:49:59,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:59,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:49:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:49:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:49:59,242 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:49:59,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677465742] [2021-11-12 22:49:59,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677465742] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:49:59,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:49:59,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-12 22:49:59,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558022010] [2021-11-12 22:49:59,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:49:59,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:49:59,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:49:59,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:49:59,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:49:59,246 INFO L87 Difference]: Start difference. First operand 27900 states and 45273 transitions. Second operand has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:01,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:01,900 INFO L93 Difference]: Finished difference Result 68888 states and 111684 transitions. [2021-11-12 22:50:01,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:50:01,900 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 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 232 [2021-11-12 22:50:01,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:02,050 INFO L225 Difference]: With dead ends: 68888 [2021-11-12 22:50:02,050 INFO L226 Difference]: Without dead ends: 41589 [2021-11-12 22:50:02,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:50:02,093 INFO L933 BasicCegarLoop]: 995 mSDtfsCounter, 2459 mSDsluCounter, 9732 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 751.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2459 SdHoareTripleChecker+Valid, 10392 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 58.40ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 897.33ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:02,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2459 Valid, 10392 Invalid, 818 Unknown, 0 Unchecked, 58.40ms Time], IncrementalHoareTripleChecker [9 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 897.33ms Time] [2021-11-12 22:50:02,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41589 states. [2021-11-12 22:50:04,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41589 to 41571. [2021-11-12 22:50:04,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41571 states, 41570 states have (on average 1.6159008900649507) internal successors, (67173), 41570 states have internal predecessors, (67173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:04,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41571 states to 41571 states and 67173 transitions. [2021-11-12 22:50:04,430 INFO L78 Accepts]: Start accepts. Automaton has 41571 states and 67173 transitions. Word has length 232 [2021-11-12 22:50:04,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:04,431 INFO L470 AbstractCegarLoop]: Abstraction has 41571 states and 67173 transitions. [2021-11-12 22:50:04,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:04,431 INFO L276 IsEmpty]: Start isEmpty. Operand 41571 states and 67173 transitions. [2021-11-12 22:50:04,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-12 22:50:04,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:04,436 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:04,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 22:50:04,437 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:50:04,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:04,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1215544706, now seen corresponding path program 1 times [2021-11-12 22:50:04,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:50:04,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047003695] [2021-11-12 22:50:04,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:04,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:50:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:04,611 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:50:04,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047003695] [2021-11-12 22:50:04,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047003695] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:04,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:04,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:50:04,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073890741] [2021-11-12 22:50:04,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:04,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:50:04,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:50:04,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:50:04,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:50:04,614 INFO L87 Difference]: Start difference. First operand 41571 states and 67173 transitions. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:06,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:06,313 INFO L93 Difference]: Finished difference Result 82543 states and 133382 transitions. [2021-11-12 22:50:06,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:50:06,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 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 233 [2021-11-12 22:50:06,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:06,443 INFO L225 Difference]: With dead ends: 82543 [2021-11-12 22:50:06,443 INFO L226 Difference]: Without dead ends: 41573 [2021-11-12 22:50:06,489 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 [2021-11-12 22:50:06,490 INFO L933 BasicCegarLoop]: 978 mSDtfsCounter, 478 mSDsluCounter, 2033 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 181.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 2882 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.69ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 220.70ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:06,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 2882 Invalid, 231 Unknown, 0 Unchecked, 10.69ms Time], IncrementalHoareTripleChecker [0 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 220.70ms Time] [2021-11-12 22:50:06,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41573 states. [2021-11-12 22:50:08,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41573 to 41571. [2021-11-12 22:50:08,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41571 states, 41570 states have (on average 1.6135915323550638) internal successors, (67077), 41570 states have internal predecessors, (67077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:08,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41571 states to 41571 states and 67077 transitions. [2021-11-12 22:50:08,489 INFO L78 Accepts]: Start accepts. Automaton has 41571 states and 67077 transitions. Word has length 233 [2021-11-12 22:50:08,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:08,490 INFO L470 AbstractCegarLoop]: Abstraction has 41571 states and 67077 transitions. [2021-11-12 22:50:08,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:08,490 INFO L276 IsEmpty]: Start isEmpty. Operand 41571 states and 67077 transitions. [2021-11-12 22:50:08,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-12 22:50:08,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:08,495 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:08,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-12 22:50:08,495 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:50:08,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:08,496 INFO L85 PathProgramCache]: Analyzing trace with hash 905758076, now seen corresponding path program 1 times [2021-11-12 22:50:08,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:50:08,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738295284] [2021-11-12 22:50:08,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:08,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:50:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:08,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:50:08,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738295284] [2021-11-12 22:50:08,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738295284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:08,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:08,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:50:08,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629231105] [2021-11-12 22:50:08,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:08,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:50:08,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:50:08,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:50:08,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:50:08,625 INFO L87 Difference]: Start difference. First operand 41571 states and 67077 transitions. Second operand has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:10,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:10,592 INFO L93 Difference]: Finished difference Result 82543 states and 133190 transitions. [2021-11-12 22:50:10,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:50:10,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 0 states have call successors, (0), 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 234 [2021-11-12 22:50:10,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:10,702 INFO L225 Difference]: With dead ends: 82543 [2021-11-12 22:50:10,703 INFO L226 Difference]: Without dead ends: 41573 [2021-11-12 22:50:10,740 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 [2021-11-12 22:50:10,744 INFO L933 BasicCegarLoop]: 982 mSDtfsCounter, 486 mSDsluCounter, 2035 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 185.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 2888 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.02ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 221.75ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:10,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 2888 Invalid, 232 Unknown, 0 Unchecked, 6.02ms Time], IncrementalHoareTripleChecker [0 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 221.75ms Time] [2021-11-12 22:50:10,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41573 states. [2021-11-12 22:50:12,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41573 to 41571. [2021-11-12 22:50:12,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41571 states, 41570 states have (on average 1.6112821746451769) internal successors, (66981), 41570 states have internal predecessors, (66981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41571 states to 41571 states and 66981 transitions. [2021-11-12 22:50:12,458 INFO L78 Accepts]: Start accepts. Automaton has 41571 states and 66981 transitions. Word has length 234 [2021-11-12 22:50:12,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:12,459 INFO L470 AbstractCegarLoop]: Abstraction has 41571 states and 66981 transitions. [2021-11-12 22:50:12,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:12,459 INFO L276 IsEmpty]: Start isEmpty. Operand 41571 states and 66981 transitions. [2021-11-12 22:50:12,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-12 22:50:12,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:12,485 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:12,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-12 22:50:12,485 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:50:12,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:12,486 INFO L85 PathProgramCache]: Analyzing trace with hash -2048774395, now seen corresponding path program 1 times [2021-11-12 22:50:12,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:50:12,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974679836] [2021-11-12 22:50:12,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:12,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:50:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:12,609 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:50:12,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974679836] [2021-11-12 22:50:12,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974679836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:12,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:12,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:50:12,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88697356] [2021-11-12 22:50:12,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:12,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:50:12,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:50:12,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:50:12,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:50:12,612 INFO L87 Difference]: Start difference. First operand 41571 states and 66981 transitions. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:14,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:14,653 INFO L93 Difference]: Finished difference Result 82543 states and 132998 transitions. [2021-11-12 22:50:14,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:50:14,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 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 235 [2021-11-12 22:50:14,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:14,739 INFO L225 Difference]: With dead ends: 82543 [2021-11-12 22:50:14,740 INFO L226 Difference]: Without dead ends: 41573 [2021-11-12 22:50:14,771 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 [2021-11-12 22:50:14,772 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 484 mSDsluCounter, 2037 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 183.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 2891 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.07ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 229.04ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:14,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 2891 Invalid, 231 Unknown, 0 Unchecked, 6.07ms Time], IncrementalHoareTripleChecker [0 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 229.04ms Time] [2021-11-12 22:50:14,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41573 states. [2021-11-12 22:50:16,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41573 to 41571. [2021-11-12 22:50:16,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41571 states, 41570 states have (on average 1.60897281693529) internal successors, (66885), 41570 states have internal predecessors, (66885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41571 states to 41571 states and 66885 transitions. [2021-11-12 22:50:16,502 INFO L78 Accepts]: Start accepts. Automaton has 41571 states and 66885 transitions. Word has length 235 [2021-11-12 22:50:16,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:16,502 INFO L470 AbstractCegarLoop]: Abstraction has 41571 states and 66885 transitions. [2021-11-12 22:50:16,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:16,503 INFO L276 IsEmpty]: Start isEmpty. Operand 41571 states and 66885 transitions. [2021-11-12 22:50:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-12 22:50:16,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:16,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:16,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-12 22:50:16,508 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:50:16,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:16,509 INFO L85 PathProgramCache]: Analyzing trace with hash 854557539, now seen corresponding path program 1 times [2021-11-12 22:50:16,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:50:16,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76714465] [2021-11-12 22:50:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:16,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:50:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:16,644 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:50:16,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76714465] [2021-11-12 22:50:16,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76714465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:16,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:16,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:50:16,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871970787] [2021-11-12 22:50:16,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:16,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:50:16,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:50:16,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:50:16,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:50:16,647 INFO L87 Difference]: Start difference. First operand 41571 states and 66885 transitions. Second operand has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:18,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:18,904 INFO L93 Difference]: Finished difference Result 82543 states and 132806 transitions. [2021-11-12 22:50:18,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:50:18,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 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 [2021-11-12 22:50:18,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:18,980 INFO L225 Difference]: With dead ends: 82543 [2021-11-12 22:50:18,981 INFO L226 Difference]: Without dead ends: 41573 [2021-11-12 22:50:19,010 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 [2021-11-12 22:50:19,011 INFO L933 BasicCegarLoop]: 984 mSDtfsCounter, 482 mSDsluCounter, 2039 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 188.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 2894 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.20ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 226.54ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:19,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 2894 Invalid, 230 Unknown, 0 Unchecked, 7.20ms Time], IncrementalHoareTripleChecker [0 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 226.54ms Time] [2021-11-12 22:50:19,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41573 states. [2021-11-12 22:50:20,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41573 to 41571. [2021-11-12 22:50:20,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41571 states, 41570 states have (on average 1.606663459225403) internal successors, (66789), 41570 states have internal predecessors, (66789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:20,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41571 states to 41571 states and 66789 transitions. [2021-11-12 22:50:20,836 INFO L78 Accepts]: Start accepts. Automaton has 41571 states and 66789 transitions. Word has length 236 [2021-11-12 22:50:20,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:20,837 INFO L470 AbstractCegarLoop]: Abstraction has 41571 states and 66789 transitions. [2021-11-12 22:50:20,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:20,837 INFO L276 IsEmpty]: Start isEmpty. Operand 41571 states and 66789 transitions. [2021-11-12 22:50:20,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-12 22:50:20,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:20,841 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:20,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-12 22:50:20,841 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:50:20,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:20,842 INFO L85 PathProgramCache]: Analyzing trace with hash 668092300, now seen corresponding path program 1 times [2021-11-12 22:50:20,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:50:20,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422555579] [2021-11-12 22:50:20,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:20,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:50:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:20,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:50:20,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422555579] [2021-11-12 22:50:20,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422555579] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:20,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:20,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:50:20,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379208863] [2021-11-12 22:50:20,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:20,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:50:20,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:50:20,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:50:20,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:50:20,995 INFO L87 Difference]: Start difference. First operand 41571 states and 66789 transitions. Second operand has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:23,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:23,113 INFO L93 Difference]: Finished difference Result 82543 states and 132614 transitions. [2021-11-12 22:50:23,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:50:23,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 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 [2021-11-12 22:50:23,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:23,199 INFO L225 Difference]: With dead ends: 82543 [2021-11-12 22:50:23,199 INFO L226 Difference]: Without dead ends: 41573 [2021-11-12 22:50:23,233 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 [2021-11-12 22:50:23,234 INFO L933 BasicCegarLoop]: 985 mSDtfsCounter, 480 mSDsluCounter, 2041 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 184.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 2897 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.33ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 222.52ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:23,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 2897 Invalid, 229 Unknown, 0 Unchecked, 6.33ms Time], IncrementalHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 222.52ms Time] [2021-11-12 22:50:23,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41573 states. [2021-11-12 22:50:25,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41573 to 41571. [2021-11-12 22:50:25,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41571 states, 41570 states have (on average 1.604354101515516) internal successors, (66693), 41570 states have internal predecessors, (66693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:25,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41571 states to 41571 states and 66693 transitions. [2021-11-12 22:50:25,744 INFO L78 Accepts]: Start accepts. Automaton has 41571 states and 66693 transitions. Word has length 237 [2021-11-12 22:50:25,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:25,745 INFO L470 AbstractCegarLoop]: Abstraction has 41571 states and 66693 transitions. [2021-11-12 22:50:25,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:25,745 INFO L276 IsEmpty]: Start isEmpty. Operand 41571 states and 66693 transitions. [2021-11-12 22:50:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-12 22:50:25,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:25,748 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:25,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-12 22:50:25,748 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:50:25,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:25,749 INFO L85 PathProgramCache]: Analyzing trace with hash 569278205, now seen corresponding path program 1 times [2021-11-12 22:50:25,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:50:25,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263589663] [2021-11-12 22:50:25,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:25,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:50:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:26,047 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:50:26,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263589663] [2021-11-12 22:50:26,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263589663] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:26,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:26,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-12 22:50:26,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964845950] [2021-11-12 22:50:26,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:26,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:50:26,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:50:26,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:50:26,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:50:26,050 INFO L87 Difference]: Start difference. First operand 41571 states and 66693 transitions. Second operand has 7 states, 7 states have (on average 34.142857142857146) internal successors, (239), 7 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:28,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:28,467 INFO L93 Difference]: Finished difference Result 82543 states and 132422 transitions. [2021-11-12 22:50:28,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:50:28,467 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 34.142857142857146) internal successors, (239), 7 states have internal predecessors, (239), 0 states have call successors, (0), 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 239 [2021-11-12 22:50:28,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:28,539 INFO L225 Difference]: With dead ends: 82543 [2021-11-12 22:50:28,539 INFO L226 Difference]: Without dead ends: 41573 [2021-11-12 22:50:28,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:50:28,567 INFO L933 BasicCegarLoop]: 977 mSDtfsCounter, 1082 mSDsluCounter, 4016 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 345.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 4749 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.34ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 408.58ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:28,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1082 Valid, 4749 Invalid, 443 Unknown, 0 Unchecked, 8.34ms Time], IncrementalHoareTripleChecker [4 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 408.58ms Time] [2021-11-12 22:50:28,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41573 states. [2021-11-12 22:50:30,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41573 to 41571. [2021-11-12 22:50:30,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41571 states, 41570 states have (on average 1.6035843156122203) internal successors, (66661), 41570 states have internal predecessors, (66661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:30,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41571 states to 41571 states and 66661 transitions. [2021-11-12 22:50:30,560 INFO L78 Accepts]: Start accepts. Automaton has 41571 states and 66661 transitions. Word has length 239 [2021-11-12 22:50:30,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:30,561 INFO L470 AbstractCegarLoop]: Abstraction has 41571 states and 66661 transitions. [2021-11-12 22:50:30,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.142857142857146) internal successors, (239), 7 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:30,561 INFO L276 IsEmpty]: Start isEmpty. Operand 41571 states and 66661 transitions. [2021-11-12 22:50:30,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-12 22:50:30,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:30,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:30,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-12 22:50:30,563 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:50:30,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:30,564 INFO L85 PathProgramCache]: Analyzing trace with hash 788077749, now seen corresponding path program 1 times [2021-11-12 22:50:30,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:50:30,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653496049] [2021-11-12 22:50:30,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:30,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:50:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:30,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:30,814 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:50:30,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653496049] [2021-11-12 22:50:30,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653496049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:30,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:30,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-12 22:50:30,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368406120] [2021-11-12 22:50:30,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:30,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:50:30,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:50:30,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:50:30,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:50:30,816 INFO L87 Difference]: Start difference. First operand 41571 states and 66661 transitions. Second operand has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:34,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:34,226 INFO L93 Difference]: Finished difference Result 102569 states and 164140 transitions. [2021-11-12 22:50:34,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:50:34,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 0 states have call successors, (0), 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 242 [2021-11-12 22:50:34,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted.