./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.05.cil.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_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/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_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.05.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/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_22745820-2bca-485b-a076-9ab6f3c36315/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 d8722862ca37b1ee13dec8b9e420cd40ba7901837b8f3b6258499da6e8a2ca6f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:13:42,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:13:42,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:13:42,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:13:42,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:13:42,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:13:42,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:13:42,235 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:13:42,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:13:42,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:13:42,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:13:42,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:13:42,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:13:42,252 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:13:42,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:13:42,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:13:42,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:13:42,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:13:42,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:13:42,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:13:42,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:13:42,284 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:13:42,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:13:42,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:13:42,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:13:42,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:13:42,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:13:42,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:13:42,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:13:42,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:13:42,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:13:42,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:13:42,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:13:42,308 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:13:42,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:13:42,310 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:13:42,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:13:42,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:13:42,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:13:42,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:13:42,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:13:42,314 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:13:42,371 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:13:42,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:13:42,373 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:13:42,373 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:13:42,373 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:13:42,374 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:13:42,382 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:13:42,382 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:13:42,382 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:13:42,383 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:13:42,384 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:13:42,384 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:13:42,385 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:13:42,385 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:13:42,385 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:13:42,386 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:13:42,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:13:42,387 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:13:42,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:13:42,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:13:42,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:13:42,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:13:42,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:13:42,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:13:42,389 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:13:42,389 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:13:42,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:13:42,390 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:13:42,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:13:42,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:13:42,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:13:42,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:13:42,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:13:42,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:13:42,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:13:42,394 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:13:42,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:13:42,395 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:13:42,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:13:42,396 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:13:42,396 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_22745820-2bca-485b-a076-9ab6f3c36315/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8722862ca37b1ee13dec8b9e420cd40ba7901837b8f3b6258499da6e8a2ca6f [2021-11-12 23:13:42,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:13:42,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:13:42,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:13:42,723 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:13:42,724 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:13:42,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/systemc/transmitter.05.cil.c [2021-11-12 23:13:42,805 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/data/67cdb24d3/78dd9c67e56c4274bfb896150ae306c3/FLAG56d24130d [2021-11-12 23:13:43,371 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:13:43,372 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/sv-benchmarks/c/systemc/transmitter.05.cil.c [2021-11-12 23:13:43,395 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/data/67cdb24d3/78dd9c67e56c4274bfb896150ae306c3/FLAG56d24130d [2021-11-12 23:13:43,690 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/data/67cdb24d3/78dd9c67e56c4274bfb896150ae306c3 [2021-11-12 23:13:43,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:13:43,695 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:13:43,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:13:43,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:13:43,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:13:43,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:13:43" (1/1) ... [2021-11-12 23:13:43,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77d5896b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:43, skipping insertion in model container [2021-11-12 23:13:43,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:13:43" (1/1) ... [2021-11-12 23:13:43,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:13:43,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:13:43,986 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_22745820-2bca-485b-a076-9ab6f3c36315/sv-benchmarks/c/systemc/transmitter.05.cil.c[706,719] [2021-11-12 23:13:44,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:13:44,099 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:13:44,113 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_22745820-2bca-485b-a076-9ab6f3c36315/sv-benchmarks/c/systemc/transmitter.05.cil.c[706,719] [2021-11-12 23:13:44,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:13:44,197 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:13:44,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:44 WrapperNode [2021-11-12 23:13:44,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:13:44,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:13:44,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:13:44,199 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:13:44,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:44" (1/1) ... [2021-11-12 23:13:44,222 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:44" (1/1) ... [2021-11-12 23:13:44,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:13:44,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:13:44,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:13:44,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:13:44,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:44" (1/1) ... [2021-11-12 23:13:44,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:44" (1/1) ... [2021-11-12 23:13:44,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:44" (1/1) ... [2021-11-12 23:13:44,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:44" (1/1) ... [2021-11-12 23:13:44,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:44" (1/1) ... [2021-11-12 23:13:44,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:44" (1/1) ... [2021-11-12 23:13:44,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:44" (1/1) ... [2021-11-12 23:13:44,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:13:44,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:13:44,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:13:44,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:13:44,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:44" (1/1) ... [2021-11-12 23:13:44,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:13:44,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:13:44,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:13:44,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:13:44,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:13:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-12 23:13:44,504 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-12 23:13:44,504 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-12 23:13:44,504 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-12 23:13:44,504 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-12 23:13:44,505 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-12 23:13:44,505 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-12 23:13:44,505 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-12 23:13:44,505 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-12 23:13:44,505 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-12 23:13:44,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:13:44,506 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-12 23:13:44,506 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-12 23:13:44,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:13:44,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:13:45,725 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:13:45,726 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-12 23:13:45,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:13:45 BoogieIcfgContainer [2021-11-12 23:13:45,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:13:45,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:13:45,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:13:45,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:13:45,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:13:43" (1/3) ... [2021-11-12 23:13:45,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a024ab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:13:45, skipping insertion in model container [2021-11-12 23:13:45,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:44" (2/3) ... [2021-11-12 23:13:45,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a024ab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:13:45, skipping insertion in model container [2021-11-12 23:13:45,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:13:45" (3/3) ... [2021-11-12 23:13:45,746 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.05.cil.c [2021-11-12 23:13:45,757 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:13:45,758 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:13:45,814 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:13:45,823 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 23:13:45,824 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:13:45,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 83 states have (on average 1.5301204819277108) internal successors, (127), 85 states have internal predecessors, (127), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-12 23:13:45,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-12 23:13:45,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:45,862 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] [2021-11-12 23:13:45,863 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:13:45,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:45,870 INFO L85 PathProgramCache]: Analyzing trace with hash -980002035, now seen corresponding path program 1 times [2021-11-12 23:13:45,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:13:45,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646465030] [2021-11-12 23:13:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:45,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:13:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:46,270 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 23:13:46,271 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:13:46,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646465030] [2021-11-12 23:13:46,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646465030] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:46,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:13:46,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:13:46,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415418538] [2021-11-12 23:13:46,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:46,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:13:46,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:13:46,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:13:46,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:13:46,337 INFO L87 Difference]: Start difference. First operand has 109 states, 83 states have (on average 1.5301204819277108) internal successors, (127), 85 states have internal predecessors, (127), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:13:46,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:46,902 INFO L93 Difference]: Finished difference Result 310 states and 477 transitions. [2021-11-12 23:13:46,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:13:46,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2021-11-12 23:13:46,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:46,934 INFO L225 Difference]: With dead ends: 310 [2021-11-12 23:13:46,934 INFO L226 Difference]: Without dead ends: 202 [2021-11-12 23:13:46,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:13:46,949 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 268 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 316.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.21ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 421.02ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:46,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 406 Invalid, 192 Unknown, 0 Unchecked, 10.21ms Time], IncrementalHoareTripleChecker [14 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 421.02ms Time] [2021-11-12 23:13:46,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-12 23:13:47,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2021-11-12 23:13:47,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 155 states have (on average 1.4451612903225806) internal successors, (224), 156 states have internal predecessors, (224), 31 states have call successors, (31), 12 states have call predecessors, (31), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-12 23:13:47,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 286 transitions. [2021-11-12 23:13:47,033 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 286 transitions. Word has length 49 [2021-11-12 23:13:47,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:47,034 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 286 transitions. [2021-11-12 23:13:47,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:13:47,035 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 286 transitions. [2021-11-12 23:13:47,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-12 23:13:47,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:47,038 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] [2021-11-12 23:13:47,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:13:47,039 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:13:47,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:47,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1936930418, now seen corresponding path program 1 times [2021-11-12 23:13:47,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:13:47,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946797618] [2021-11-12 23:13:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:47,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:13:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:47,153 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 23:13:47,154 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:13:47,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946797618] [2021-11-12 23:13:47,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946797618] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:47,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:13:47,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:13:47,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493635969] [2021-11-12 23:13:47,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:47,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:13:47,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:13:47,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:13:47,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:13:47,158 INFO L87 Difference]: Start difference. First operand 199 states and 286 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:13:47,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:47,781 INFO L93 Difference]: Finished difference Result 671 states and 971 transitions. [2021-11-12 23:13:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:13:47,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2021-11-12 23:13:47,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:47,794 INFO L225 Difference]: With dead ends: 671 [2021-11-12 23:13:47,795 INFO L226 Difference]: Without dead ends: 458 [2021-11-12 23:13:47,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:13:47,809 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 528 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 365.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.46ms SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 459.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:47,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 650 Invalid, 443 Unknown, 0 Unchecked, 20.46ms Time], IncrementalHoareTripleChecker [138 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 459.56ms Time] [2021-11-12 23:13:47,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-12 23:13:47,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 446. [2021-11-12 23:13:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 357 states have (on average 1.4397759103641457) internal successors, (514), 354 states have internal predecessors, (514), 60 states have call successors, (60), 26 states have call predecessors, (60), 28 states have return successors, (66), 66 states have call predecessors, (66), 60 states have call successors, (66) [2021-11-12 23:13:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 640 transitions. [2021-11-12 23:13:47,932 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 640 transitions. Word has length 49 [2021-11-12 23:13:47,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:47,935 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 640 transitions. [2021-11-12 23:13:47,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:13:47,943 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 640 transitions. [2021-11-12 23:13:47,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-12 23:13:47,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:47,947 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] [2021-11-12 23:13:47,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:13:47,947 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:13:47,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:47,951 INFO L85 PathProgramCache]: Analyzing trace with hash 781479119, now seen corresponding path program 1 times [2021-11-12 23:13:47,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:13:47,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359516819] [2021-11-12 23:13:47,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:47,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:13:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:48,130 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 23:13:48,131 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:13:48,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359516819] [2021-11-12 23:13:48,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359516819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:48,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:13:48,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:13:48,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259477156] [2021-11-12 23:13:48,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:48,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:13:48,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:13:48,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:13:48,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:13:48,137 INFO L87 Difference]: Start difference. First operand 446 states and 640 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:13:48,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:48,615 INFO L93 Difference]: Finished difference Result 1537 states and 2228 transitions. [2021-11-12 23:13:48,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:13:48,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2021-11-12 23:13:48,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:48,625 INFO L225 Difference]: With dead ends: 1537 [2021-11-12 23:13:48,626 INFO L226 Difference]: Without dead ends: 1061 [2021-11-12 23:13:48,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:13:48,630 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 528 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 286.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.01ms SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 348.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:48,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 532 Invalid, 411 Unknown, 0 Unchecked, 9.01ms Time], IncrementalHoareTripleChecker [138 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 348.08ms Time] [2021-11-12 23:13:48,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-11-12 23:13:48,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 833. [2021-11-12 23:13:48,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 668 states have (on average 1.437125748502994) internal successors, (960), 666 states have internal predecessors, (960), 108 states have call successors, (108), 50 states have call predecessors, (108), 56 states have return successors, (125), 117 states have call predecessors, (125), 108 states have call successors, (125) [2021-11-12 23:13:48,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1193 transitions. [2021-11-12 23:13:48,732 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1193 transitions. Word has length 49 [2021-11-12 23:13:48,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:48,734 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1193 transitions. [2021-11-12 23:13:48,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:13:48,735 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1193 transitions. [2021-11-12 23:13:48,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-12 23:13:48,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:48,748 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] [2021-11-12 23:13:48,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 23:13:48,749 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:13:48,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:48,751 INFO L85 PathProgramCache]: Analyzing trace with hash 724334894, now seen corresponding path program 1 times [2021-11-12 23:13:48,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:13:48,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270046973] [2021-11-12 23:13:48,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:48,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:13:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:48,897 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 23:13:48,898 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:13:48,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270046973] [2021-11-12 23:13:48,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270046973] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:48,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:13:48,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:13:48,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741337888] [2021-11-12 23:13:48,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:48,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:13:48,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:13:48,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:13:48,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:13:48,902 INFO L87 Difference]: Start difference. First operand 833 states and 1193 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:13:49,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:49,397 INFO L93 Difference]: Finished difference Result 2824 states and 4109 transitions. [2021-11-12 23:13:49,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:13:49,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2021-11-12 23:13:49,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:49,416 INFO L225 Difference]: With dead ends: 2824 [2021-11-12 23:13:49,417 INFO L226 Difference]: Without dead ends: 1930 [2021-11-12 23:13:49,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:13:49,434 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 530 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 277.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.28ms SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 340.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:49,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 533 Invalid, 421 Unknown, 0 Unchecked, 10.28ms Time], IncrementalHoareTripleChecker [143 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 340.65ms Time] [2021-11-12 23:13:49,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2021-11-12 23:13:49,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1589. [2021-11-12 23:13:49,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1589 states, 1268 states have (on average 1.4290220820189274) internal successors, (1812), 1270 states have internal predecessors, (1812), 208 states have call successors, (208), 98 states have call predecessors, (208), 112 states have return successors, (249), 221 states have call predecessors, (249), 208 states have call successors, (249) [2021-11-12 23:13:49,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 2269 transitions. [2021-11-12 23:13:49,603 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 2269 transitions. Word has length 49 [2021-11-12 23:13:49,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:49,606 INFO L470 AbstractCegarLoop]: Abstraction has 1589 states and 2269 transitions. [2021-11-12 23:13:49,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:13:49,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 2269 transitions. [2021-11-12 23:13:49,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-12 23:13:49,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:49,614 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:13:49,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 23:13:49,614 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:13:49,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:49,618 INFO L85 PathProgramCache]: Analyzing trace with hash -590206767, now seen corresponding path program 1 times [2021-11-12 23:13:49,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:13:49,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248299397] [2021-11-12 23:13:49,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:49,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:13:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:13:49,821 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:13:49,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248299397] [2021-11-12 23:13:49,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248299397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:49,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:13:49,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:13:49,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328278687] [2021-11-12 23:13:49,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:49,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:13:49,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:13:49,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:13:49,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:13:49,824 INFO L87 Difference]: Start difference. First operand 1589 states and 2269 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 23:13:50,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:50,361 INFO L93 Difference]: Finished difference Result 4762 states and 6845 transitions. [2021-11-12 23:13:50,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:13:50,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 64 [2021-11-12 23:13:50,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:50,396 INFO L225 Difference]: With dead ends: 4762 [2021-11-12 23:13:50,396 INFO L226 Difference]: Without dead ends: 3179 [2021-11-12 23:13:50,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:13:50,403 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 485 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 226.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.62ms SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 273.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:50,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 449 Invalid, 349 Unknown, 0 Unchecked, 8.62ms Time], IncrementalHoareTripleChecker [113 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 273.84ms Time] [2021-11-12 23:13:50,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3179 states. [2021-11-12 23:13:50,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3179 to 2635. [2021-11-12 23:13:50,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2126 states have (on average 1.4153339604891815) internal successors, (3009), 2129 states have internal predecessors, (3009), 316 states have call successors, (316), 164 states have call predecessors, (316), 192 states have return successors, (398), 342 states have call predecessors, (398), 316 states have call successors, (398) [2021-11-12 23:13:50,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 3723 transitions. [2021-11-12 23:13:50,618 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 3723 transitions. Word has length 64 [2021-11-12 23:13:50,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:50,619 INFO L470 AbstractCegarLoop]: Abstraction has 2635 states and 3723 transitions. [2021-11-12 23:13:50,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 23:13:50,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 3723 transitions. [2021-11-12 23:13:50,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-12 23:13:50,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:50,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:13:50,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 23:13:50,637 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:13:50,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:50,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1982902333, now seen corresponding path program 1 times [2021-11-12 23:13:50,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:13:50,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838159953] [2021-11-12 23:13:50,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:50,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:13:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 23:13:50,737 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:13:50,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838159953] [2021-11-12 23:13:50,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838159953] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:50,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:13:50,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:13:50,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431780543] [2021-11-12 23:13:50,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:50,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:13:50,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:13:50,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:13:50,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:13:50,740 INFO L87 Difference]: Start difference. First operand 2635 states and 3723 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 23:13:51,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:51,429 INFO L93 Difference]: Finished difference Result 9255 states and 13148 transitions. [2021-11-12 23:13:51,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:13:51,430 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 66 [2021-11-12 23:13:51,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:51,483 INFO L225 Difference]: With dead ends: 9255 [2021-11-12 23:13:51,483 INFO L226 Difference]: Without dead ends: 6626 [2021-11-12 23:13:51,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:13:51,496 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 519 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 188.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.37ms SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 234.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:51,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 341 Invalid, 291 Unknown, 0 Unchecked, 5.37ms Time], IncrementalHoareTripleChecker [113 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 234.13ms Time] [2021-11-12 23:13:51,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6626 states. [2021-11-12 23:13:51,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6626 to 5108. [2021-11-12 23:13:51,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5108 states, 4119 states have (on average 1.4039815489196408) internal successors, (5783), 4126 states have internal predecessors, (5783), 604 states have call successors, (604), 328 states have call predecessors, (604), 384 states have return successors, (754), 654 states have call predecessors, (754), 604 states have call successors, (754) [2021-11-12 23:13:51,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5108 states to 5108 states and 7141 transitions. [2021-11-12 23:13:51,967 INFO L78 Accepts]: Start accepts. Automaton has 5108 states and 7141 transitions. Word has length 66 [2021-11-12 23:13:51,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:51,968 INFO L470 AbstractCegarLoop]: Abstraction has 5108 states and 7141 transitions. [2021-11-12 23:13:51,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 23:13:51,968 INFO L276 IsEmpty]: Start isEmpty. Operand 5108 states and 7141 transitions. [2021-11-12 23:13:51,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:13:51,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:51,974 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:13:51,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 23:13:51,975 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:13:51,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:51,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1200028401, now seen corresponding path program 1 times [2021-11-12 23:13:51,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:13:51,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48745227] [2021-11-12 23:13:51,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:51,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:13:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:13:52,130 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:13:52,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48745227] [2021-11-12 23:13:52,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48745227] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:52,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:13:52,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:13:52,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868487850] [2021-11-12 23:13:52,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:52,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:13:52,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:13:52,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:13:52,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:13:52,132 INFO L87 Difference]: Start difference. First operand 5108 states and 7141 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 23:13:53,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:53,041 INFO L93 Difference]: Finished difference Result 14036 states and 19761 transitions. [2021-11-12 23:13:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:13:53,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 68 [2021-11-12 23:13:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:53,123 INFO L225 Difference]: With dead ends: 14036 [2021-11-12 23:13:53,123 INFO L226 Difference]: Without dead ends: 8934 [2021-11-12 23:13:53,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:13:53,146 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 431 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 225.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.83ms SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 277.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:53,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 444 Invalid, 350 Unknown, 0 Unchecked, 7.83ms Time], IncrementalHoareTripleChecker [113 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 277.17ms Time] [2021-11-12 23:13:53,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8934 states. [2021-11-12 23:13:53,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8934 to 7564. [2021-11-12 23:13:53,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7564 states, 6087 states have (on average 1.3936257598160013) internal successors, (8483), 6088 states have internal predecessors, (8483), 900 states have call successors, (900), 496 states have call predecessors, (900), 576 states have return successors, (1108), 980 states have call predecessors, (1108), 900 states have call successors, (1108) [2021-11-12 23:13:53,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7564 states to 7564 states and 10491 transitions. [2021-11-12 23:13:53,854 INFO L78 Accepts]: Start accepts. Automaton has 7564 states and 10491 transitions. Word has length 68 [2021-11-12 23:13:53,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:53,856 INFO L470 AbstractCegarLoop]: Abstraction has 7564 states and 10491 transitions. [2021-11-12 23:13:53,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 23:13:53,857 INFO L276 IsEmpty]: Start isEmpty. Operand 7564 states and 10491 transitions. [2021-11-12 23:13:53,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 23:13:53,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:53,863 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:13:53,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 23:13:53,864 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:13:53,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:53,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1716226171, now seen corresponding path program 1 times [2021-11-12 23:13:53,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:13:53,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733293517] [2021-11-12 23:13:53,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:53,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:13:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:13:53,990 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:13:53,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733293517] [2021-11-12 23:13:53,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733293517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:53,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:13:53,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:13:53,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079291081] [2021-11-12 23:13:53,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:53,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:13:53,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:13:53,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:13:53,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:13:53,993 INFO L87 Difference]: Start difference. First operand 7564 states and 10491 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 23:13:55,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:55,301 INFO L93 Difference]: Finished difference Result 20318 states and 28385 transitions. [2021-11-12 23:13:55,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:13:55,302 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 70 [2021-11-12 23:13:55,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:55,416 INFO L225 Difference]: With dead ends: 20318 [2021-11-12 23:13:55,416 INFO L226 Difference]: Without dead ends: 12760 [2021-11-12 23:13:55,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:13:55,452 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 414 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 319.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.84ms SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 374.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:55,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 429 Invalid, 347 Unknown, 0 Unchecked, 5.84ms Time], IncrementalHoareTripleChecker [113 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 374.29ms Time] [2021-11-12 23:13:55,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12760 states. [2021-11-12 23:13:56,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12760 to 11254. [2021-11-12 23:13:56,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11254 states, 9043 states have (on average 1.382837553909101) internal successors, (12505), 9028 states have internal predecessors, (12505), 1346 states have call successors, (1346), 752 states have call predecessors, (1346), 864 states have return successors, (1630), 1474 states have call predecessors, (1630), 1346 states have call successors, (1630) [2021-11-12 23:13:56,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11254 states to 11254 states and 15481 transitions. [2021-11-12 23:13:56,568 INFO L78 Accepts]: Start accepts. Automaton has 11254 states and 15481 transitions. Word has length 70 [2021-11-12 23:13:56,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:56,570 INFO L470 AbstractCegarLoop]: Abstraction has 11254 states and 15481 transitions. [2021-11-12 23:13:56,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 23:13:56,572 INFO L276 IsEmpty]: Start isEmpty. Operand 11254 states and 15481 transitions. [2021-11-12 23:13:56,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 23:13:56,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:56,580 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:13:56,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 23:13:56,581 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:13:56,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:56,582 INFO L85 PathProgramCache]: Analyzing trace with hash 569561777, now seen corresponding path program 1 times [2021-11-12 23:13:56,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:13:56,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999752652] [2021-11-12 23:13:56,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:56,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:13:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:13:56,709 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:13:56,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999752652] [2021-11-12 23:13:56,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999752652] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:56,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:13:56,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:13:56,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587351772] [2021-11-12 23:13:56,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:56,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:13:56,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:13:56,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:13:56,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:13:56,713 INFO L87 Difference]: Start difference. First operand 11254 states and 15481 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 23:13:58,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:58,678 INFO L93 Difference]: Finished difference Result 35514 states and 49024 transitions. [2021-11-12 23:13:58,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:13:58,679 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 72 [2021-11-12 23:13:58,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:58,890 INFO L225 Difference]: With dead ends: 35514 [2021-11-12 23:13:58,891 INFO L226 Difference]: Without dead ends: 24266 [2021-11-12 23:13:58,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:13:58,950 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 408 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 192.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.23ms SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 233.80ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:58,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 330 Invalid, 290 Unknown, 0 Unchecked, 5.23ms Time], IncrementalHoareTripleChecker [117 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 233.80ms Time] [2021-11-12 23:13:58,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24266 states. [2021-11-12 23:14:00,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24266 to 21672. [2021-11-12 23:14:00,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21672 states, 17425 states have (on average 1.3698134863701579) internal successors, (23869), 17410 states have internal predecessors, (23869), 2556 states have call successors, (2556), 1480 states have call predecessors, (2556), 1690 states have return successors, (3054), 2782 states have call predecessors, (3054), 2556 states have call successors, (3054) [2021-11-12 23:14:01,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21672 states to 21672 states and 29479 transitions. [2021-11-12 23:14:01,005 INFO L78 Accepts]: Start accepts. Automaton has 21672 states and 29479 transitions. Word has length 72 [2021-11-12 23:14:01,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:14:01,006 INFO L470 AbstractCegarLoop]: Abstraction has 21672 states and 29479 transitions. [2021-11-12 23:14:01,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 23:14:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand 21672 states and 29479 transitions. [2021-11-12 23:14:01,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-12 23:14:01,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:14:01,022 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:14:01,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 23:14:01,023 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:14:01,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:14:01,023 INFO L85 PathProgramCache]: Analyzing trace with hash -978174771, now seen corresponding path program 1 times [2021-11-12 23:14:01,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:14:01,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731336852] [2021-11-12 23:14:01,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:01,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:14:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:14:01,093 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:14:01,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731336852] [2021-11-12 23:14:01,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731336852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:14:01,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:14:01,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:14:01,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743779168] [2021-11-12 23:14:01,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:14:01,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:14:01,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:14:01,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:14:01,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:14:01,096 INFO L87 Difference]: Start difference. First operand 21672 states and 29479 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 23:14:02,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:14:02,704 INFO L93 Difference]: Finished difference Result 41506 states and 57162 transitions. [2021-11-12 23:14:02,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:14:02,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2021-11-12 23:14:02,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:14:02,857 INFO L225 Difference]: With dead ends: 41506 [2021-11-12 23:14:02,857 INFO L226 Difference]: Without dead ends: 29368 [2021-11-12 23:14:02,899 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 23:14:02,901 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 91 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.70ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:14:02,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 351 Invalid, 76 Unknown, 0 Unchecked, 2.70ms Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 73.53ms Time] [2021-11-12 23:14:02,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29368 states. [2021-11-12 23:14:04,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29368 to 23946. [2021-11-12 23:14:04,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23946 states, 19483 states have (on average 1.3828979109993327) internal successors, (26943), 19468 states have internal predecessors, (26943), 2664 states have call successors, (2664), 1588 states have call predecessors, (2664), 1798 states have return successors, (3162), 2890 states have call predecessors, (3162), 2664 states have call successors, (3162) [2021-11-12 23:14:05,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23946 states to 23946 states and 32769 transitions. [2021-11-12 23:14:05,293 INFO L78 Accepts]: Start accepts. Automaton has 23946 states and 32769 transitions. Word has length 74 [2021-11-12 23:14:05,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:14:05,304 INFO L470 AbstractCegarLoop]: Abstraction has 23946 states and 32769 transitions. [2021-11-12 23:14:05,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 23:14:05,305 INFO L276 IsEmpty]: Start isEmpty. Operand 23946 states and 32769 transitions. [2021-11-12 23:14:05,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 23:14:05,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:14:05,321 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:14:05,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 23:14:05,322 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:14:05,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:14:05,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1461176118, now seen corresponding path program 1 times [2021-11-12 23:14:05,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:14:05,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797854285] [2021-11-12 23:14:05,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:05,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:14:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:14:05,401 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:14:05,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797854285] [2021-11-12 23:14:05,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797854285] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:14:05,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:14:05,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:14:05,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44251162] [2021-11-12 23:14:05,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:14:05,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:14:05,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:14:05,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:14:05,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:14:05,404 INFO L87 Difference]: Start difference. First operand 23946 states and 32769 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:14:06,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:14:06,678 INFO L93 Difference]: Finished difference Result 41529 states and 57129 transitions. [2021-11-12 23:14:06,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:14:06,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 83 [2021-11-12 23:14:06,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:14:06,816 INFO L225 Difference]: With dead ends: 41529 [2021-11-12 23:14:06,816 INFO L226 Difference]: Without dead ends: 25612 [2021-11-12 23:14:06,859 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 23:14:06,860 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 118 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.66ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.09ms IncrementalHoareTripleChecker+Time [2021-11-12 23:14:06,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 261 Invalid, 63 Unknown, 0 Unchecked, 2.66ms Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 79.09ms Time] [2021-11-12 23:14:06,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25612 states. [2021-11-12 23:14:08,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25612 to 23062. [2021-11-12 23:14:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23062 states, 18767 states have (on average 1.3742739915809665) internal successors, (25791), 18720 states have internal predecessors, (25791), 2640 states have call successors, (2640), 1580 states have call predecessors, (2640), 1654 states have return successors, (2810), 2762 states have call predecessors, (2810), 2640 states have call successors, (2810) [2021-11-12 23:14:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23062 states to 23062 states and 31241 transitions. [2021-11-12 23:14:08,546 INFO L78 Accepts]: Start accepts. Automaton has 23062 states and 31241 transitions. Word has length 83 [2021-11-12 23:14:08,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:14:08,547 INFO L470 AbstractCegarLoop]: Abstraction has 23062 states and 31241 transitions. [2021-11-12 23:14:08,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:14:08,547 INFO L276 IsEmpty]: Start isEmpty. Operand 23062 states and 31241 transitions. [2021-11-12 23:14:08,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 23:14:08,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:14:08,580 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:14:08,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 23:14:08,580 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:14:08,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:14:08,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1385793060, now seen corresponding path program 1 times [2021-11-12 23:14:08,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:14:08,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379906299] [2021-11-12 23:14:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:08,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:14:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 23:14:08,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:14:08,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379906299] [2021-11-12 23:14:08,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379906299] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:14:08,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:14:08,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:14:08,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069614443] [2021-11-12 23:14:08,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:14:08,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:14:08,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:14:08,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:14:08,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:14:08,635 INFO L87 Difference]: Start difference. First operand 23062 states and 31241 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-12 23:14:10,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:14:10,800 INFO L93 Difference]: Finished difference Result 57507 states and 78300 transitions. [2021-11-12 23:14:10,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:14:10,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 103 [2021-11-12 23:14:10,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:14:10,930 INFO L225 Difference]: With dead ends: 57507 [2021-11-12 23:14:10,930 INFO L226 Difference]: Without dead ends: 34450 [2021-11-12 23:14:10,987 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 23:14:10,988 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 115 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.05ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:14:10,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 257 Invalid, 61 Unknown, 0 Unchecked, 2.05ms Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 76.95ms Time] [2021-11-12 23:14:11,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34450 states. [2021-11-12 23:14:13,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34450 to 34268. [2021-11-12 23:14:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34268 states, 27909 states have (on average 1.3596689240030098) internal successors, (37947), 27844 states have internal predecessors, (37947), 3892 states have call successors, (3892), 2358 states have call predecessors, (3892), 2466 states have return successors, (4134), 4066 states have call predecessors, (4134), 3892 states have call successors, (4134) [2021-11-12 23:14:13,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34268 states to 34268 states and 45973 transitions. [2021-11-12 23:14:13,287 INFO L78 Accepts]: Start accepts. Automaton has 34268 states and 45973 transitions. Word has length 103 [2021-11-12 23:14:13,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:14:13,287 INFO L470 AbstractCegarLoop]: Abstraction has 34268 states and 45973 transitions. [2021-11-12 23:14:13,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-12 23:14:13,288 INFO L276 IsEmpty]: Start isEmpty. Operand 34268 states and 45973 transitions. [2021-11-12 23:14:13,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-12 23:14:13,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:14:13,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:14:13,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-12 23:14:13,337 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:14:13,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:14:13,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1262328639, now seen corresponding path program 1 times [2021-11-12 23:14:13,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:14:13,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660733556] [2021-11-12 23:14:13,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:13,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:14:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:14:13,443 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:14:13,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660733556] [2021-11-12 23:14:13,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660733556] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:14:13,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597023300] [2021-11-12 23:14:13,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:13,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:14:13,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:14:13,450 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:14:13,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:14:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:13,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:14:13,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:14,018 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:14:14,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:14:14,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597023300] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:14:14,346 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:14:14,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-11-12 23:14:14,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514944073] [2021-11-12 23:14:14,347 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:14:14,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:14:14,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:14:14,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:14:14,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:14:14,350 INFO L87 Difference]: Start difference. First operand 34268 states and 45973 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 23:14:17,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:14:17,372 INFO L93 Difference]: Finished difference Result 68114 states and 92483 transitions. [2021-11-12 23:14:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:14:17,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 105 [2021-11-12 23:14:17,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:14:17,540 INFO L225 Difference]: With dead ends: 68114 [2021-11-12 23:14:17,540 INFO L226 Difference]: Without dead ends: 45058 [2021-11-12 23:14:17,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:14:17,603 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 191 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.32ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 112.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:14:17,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 370 Invalid, 93 Unknown, 0 Unchecked, 3.32ms Time], IncrementalHoareTripleChecker [12 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 112.06ms Time] [2021-11-12 23:14:17,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45058 states. [2021-11-12 23:14:20,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45058 to 38132. [2021-11-12 23:14:20,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38132 states, 31417 states have (on average 1.3746379348760225) internal successors, (43187), 31352 states have internal predecessors, (43187), 4070 states have call successors, (4070), 2536 states have call predecessors, (4070), 2644 states have return successors, (4312), 4244 states have call predecessors, (4312), 4070 states have call successors, (4312) [2021-11-12 23:14:20,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38132 states to 38132 states and 51569 transitions. [2021-11-12 23:14:20,592 INFO L78 Accepts]: Start accepts. Automaton has 38132 states and 51569 transitions. Word has length 105 [2021-11-12 23:14:20,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:14:20,593 INFO L470 AbstractCegarLoop]: Abstraction has 38132 states and 51569 transitions. [2021-11-12 23:14:20,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 23:14:20,593 INFO L276 IsEmpty]: Start isEmpty. Operand 38132 states and 51569 transitions. [2021-11-12 23:14:20,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-12 23:14:20,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:14:20,632 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:14:20,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:14:20,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-12 23:14:20,846 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:14:20,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:14:20,847 INFO L85 PathProgramCache]: Analyzing trace with hash 766787725, now seen corresponding path program 1 times [2021-11-12 23:14:20,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:14:20,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367840407] [2021-11-12 23:14:20,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:20,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:14:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:14:20,944 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:14:20,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367840407] [2021-11-12 23:14:20,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367840407] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:14:20,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227502659] [2021-11-12 23:14:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:20,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:14:20,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:14:20,947 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:14:20,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:14:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:21,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:14:21,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:14:21,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:14:21,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227502659] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:14:21,688 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:14:21,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-11-12 23:14:21,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283781759] [2021-11-12 23:14:21,692 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:14:21,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:14:21,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:14:21,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:14:21,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:14:21,695 INFO L87 Difference]: Start difference. First operand 38132 states and 51569 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 23:14:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:14:24,564 INFO L93 Difference]: Finished difference Result 74950 states and 102163 transitions. [2021-11-12 23:14:24,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:14:24,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 105 [2021-11-12 23:14:24,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:14:24,754 INFO L225 Difference]: With dead ends: 74950 [2021-11-12 23:14:24,755 INFO L226 Difference]: Without dead ends: 49154 [2021-11-12 23:14:24,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:14:24,815 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 173 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.06ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.45ms IncrementalHoareTripleChecker+Time [2021-11-12 23:14:24,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 360 Invalid, 91 Unknown, 0 Unchecked, 3.06ms Time], IncrementalHoareTripleChecker [12 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 95.45ms Time] [2021-11-12 23:14:24,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49154 states. [2021-11-12 23:14:27,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49154 to 43360. [2021-11-12 23:14:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43360 states, 36149 states have (on average 1.3866220365708595) internal successors, (50125), 36084 states have internal predecessors, (50125), 4318 states have call successors, (4318), 2784 states have call predecessors, (4318), 2892 states have return successors, (4560), 4492 states have call predecessors, (4560), 4318 states have call successors, (4560) [2021-11-12 23:14:27,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43360 states to 43360 states and 59003 transitions. [2021-11-12 23:14:27,778 INFO L78 Accepts]: Start accepts. Automaton has 43360 states and 59003 transitions. Word has length 105 [2021-11-12 23:14:27,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:14:27,779 INFO L470 AbstractCegarLoop]: Abstraction has 43360 states and 59003 transitions. [2021-11-12 23:14:27,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 23:14:27,780 INFO L276 IsEmpty]: Start isEmpty. Operand 43360 states and 59003 transitions. [2021-11-12 23:14:27,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-12 23:14:27,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:14:27,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:14:27,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:14:28,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:14:28,017 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:14:28,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:14:28,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1400062897, now seen corresponding path program 1 times [2021-11-12 23:14:28,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:14:28,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760428693] [2021-11-12 23:14:28,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:28,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:14:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:14:28,107 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:14:28,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760428693] [2021-11-12 23:14:28,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760428693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:14:28,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51965488] [2021-11-12 23:14:28,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:28,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:14:28,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:14:28,127 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:14:28,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 23:14:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:28,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:14:28,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:14:28,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:14:28,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51965488] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:14:28,816 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:14:28,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-11-12 23:14:28,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433534526] [2021-11-12 23:14:28,817 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:14:28,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:14:28,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:14:28,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:14:28,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:14:28,819 INFO L87 Difference]: Start difference. First operand 43360 states and 59003 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 23:14:31,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:14:31,914 INFO L93 Difference]: Finished difference Result 84098 states and 115155 transitions. [2021-11-12 23:14:31,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:14:31,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 105 [2021-11-12 23:14:31,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:14:32,102 INFO L225 Difference]: With dead ends: 84098 [2021-11-12 23:14:32,102 INFO L226 Difference]: Without dead ends: 54694 [2021-11-12 23:14:32,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:14:32,167 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 95 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.76ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.85ms IncrementalHoareTripleChecker+Time [2021-11-12 23:14:32,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 478 Invalid, 107 Unknown, 0 Unchecked, 3.76ms Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 92.85ms Time] [2021-11-12 23:14:32,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54694 states. [2021-11-12 23:14:35,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54694 to 49992. [2021-11-12 23:14:35,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49992 states, 42141 states have (on average 1.3956242139484112) internal successors, (58813), 42076 states have internal predecessors, (58813), 4638 states have call successors, (4638), 3104 states have call predecessors, (4638), 3212 states have return successors, (4880), 4812 states have call predecessors, (4880), 4638 states have call successors, (4880) [2021-11-12 23:14:35,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49992 states to 49992 states and 68331 transitions. [2021-11-12 23:14:35,537 INFO L78 Accepts]: Start accepts. Automaton has 49992 states and 68331 transitions. Word has length 105 [2021-11-12 23:14:35,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:14:35,538 INFO L470 AbstractCegarLoop]: Abstraction has 49992 states and 68331 transitions. [2021-11-12 23:14:35,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 23:14:35,538 INFO L276 IsEmpty]: Start isEmpty. Operand 49992 states and 68331 transitions. [2021-11-12 23:14:35,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 23:14:35,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:14:35,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:14:35,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-12 23:14:35,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22745820-2bca-485b-a076-9ab6f3c36315/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-12 23:14:35,770 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:14:35,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:14:35,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1181319738, now seen corresponding path program 1 times [2021-11-12 23:14:35,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:14:35,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563781226] [2021-11-12 23:14:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:35,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:14:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:14:35,845 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:14:35,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563781226] [2021-11-12 23:14:35,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563781226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:14:35,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:14:35,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:14:35,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121830767] [2021-11-12 23:14:35,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:14:35,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:14:35,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:14:35,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:14:35,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:14:35,849 INFO L87 Difference]: Start difference. First operand 49992 states and 68331 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-12 23:14:39,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:14:39,657 INFO L93 Difference]: Finished difference Result 125143 states and 171514 transitions. [2021-11-12 23:14:39,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:14:39,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 102 [2021-11-12 23:14:39,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:14:39,865 INFO L225 Difference]: With dead ends: 125143 [2021-11-12 23:14:39,865 INFO L226 Difference]: Without dead ends: 75156 [2021-11-12 23:14:39,943 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 23:14:39,944 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 118 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.46ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:14:39,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 265 Invalid, 61 Unknown, 0 Unchecked, 2.46ms Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 76.66ms Time] [2021-11-12 23:14:40,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75156 states.