./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 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ead7d-262b-4111-91b1-3ec9ba22f24d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ead7d-262b-4111-91b1-3ec9ba22f24d/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ead7d-262b-4111-91b1-3ec9ba22f24d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ead7d-262b-4111-91b1-3ec9ba22f24d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.05.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ead7d-262b-4111-91b1-3ec9ba22f24d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ead7d-262b-4111-91b1-3ec9ba22f24d/bin/utaipan-UUZaoUuFF8 --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-47ea020 [2021-11-07 00:58:51,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:58:51,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:58:51,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:58:51,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:58:51,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:58:51,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:58:51,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:58:51,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:58:51,239 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:58:51,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:58:51,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:58:51,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:58:51,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:58:51,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:58:51,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:58:51,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:58:51,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:58:51,280 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:58:51,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:58:51,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:58:51,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:58:51,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:58:51,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:58:51,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:58:51,310 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:58:51,310 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:58:51,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:58:51,314 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:58:51,315 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:58:51,316 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:58:51,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:58:51,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:58:51,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:58:51,338 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:58:51,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:58:51,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:58:51,340 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:58:51,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:58:51,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:58:51,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:58:51,344 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ead7d-262b-4111-91b1-3ec9ba22f24d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 00:58:51,394 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:58:51,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:58:51,396 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:58:51,397 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:58:51,397 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:58:51,397 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:58:51,398 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:58:51,398 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:58:51,398 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:58:51,398 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:58:51,407 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:58:51,407 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:58:51,407 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:58:51,408 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:58:51,408 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:58:51,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:58:51,409 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:58:51,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:58:51,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:58:51,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:58:51,410 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:58:51,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:58:51,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:58:51,411 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:58:51,411 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:58:51,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:58:51,411 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:58:51,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:58:51,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:58:51,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:58:51,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:58:51,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:58:51,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:58:51,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:58:51,415 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:58:51,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:58:51,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:58:51,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:58:51,416 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:58:51,416 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_a69ead7d-262b-4111-91b1-3ec9ba22f24d/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ead7d-262b-4111-91b1-3ec9ba22f24d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8722862ca37b1ee13dec8b9e420cd40ba7901837b8f3b6258499da6e8a2ca6f [2021-11-07 00:58:51,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:58:51,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:58:51,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:58:51,770 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:58:51,771 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:58:51,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ead7d-262b-4111-91b1-3ec9ba22f24d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/systemc/transmitter.05.cil.c [2021-11-07 00:58:51,848 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ead7d-262b-4111-91b1-3ec9ba22f24d/bin/utaipan-UUZaoUuFF8/data/0387cfeb5/5e3aab2d4cc049b18527d3df2ecd167c/FLAGffbeddde9 [2021-11-07 00:58:52,456 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:58:52,457 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ead7d-262b-4111-91b1-3ec9ba22f24d/sv-benchmarks/c/systemc/transmitter.05.cil.c [2021-11-07 00:58:52,475 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ead7d-262b-4111-91b1-3ec9ba22f24d/bin/utaipan-UUZaoUuFF8/data/0387cfeb5/5e3aab2d4cc049b18527d3df2ecd167c/FLAGffbeddde9 [2021-11-07 00:58:52,775 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ead7d-262b-4111-91b1-3ec9ba22f24d/bin/utaipan-UUZaoUuFF8/data/0387cfeb5/5e3aab2d4cc049b18527d3df2ecd167c [2021-11-07 00:58:52,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:58:52,779 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:58:52,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:58:52,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:58:52,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:58:52,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:58:52" (1/1) ... [2021-11-07 00:58:52,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62732667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:52, skipping insertion in model container [2021-11-07 00:58:52,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:58:52" (1/1) ... [2021-11-07 00:58:52,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:58:52,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:58:52,965 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_a69ead7d-262b-4111-91b1-3ec9ba22f24d/sv-benchmarks/c/systemc/transmitter.05.cil.c[706,719] [2021-11-07 00:58:53,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:58:53,064 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:58:53,079 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_a69ead7d-262b-4111-91b1-3ec9ba22f24d/sv-benchmarks/c/systemc/transmitter.05.cil.c[706,719] [2021-11-07 00:58:53,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:58:53,177 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:58:53,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:53 WrapperNode [2021-11-07 00:58:53,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:58:53,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:58:53,179 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:58:53,179 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:58:53,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:53" (1/1) ... [2021-11-07 00:58:53,205 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:53" (1/1) ... [2021-11-07 00:58:53,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:58:53,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:58:53,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:58:53,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:58:53,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:53" (1/1) ... [2021-11-07 00:58:53,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:53" (1/1) ... [2021-11-07 00:58:53,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:53" (1/1) ... [2021-11-07 00:58:53,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:53" (1/1) ... [2021-11-07 00:58:53,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:53" (1/1) ... [2021-11-07 00:58:53,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:53" (1/1) ... [2021-11-07 00:58:53,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:53" (1/1) ... [2021-11-07 00:58:53,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:58:53,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:58:53,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:58:53,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:58:53,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:53" (1/1) ... [2021-11-07 00:58:53,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:58:53,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ead7d-262b-4111-91b1-3ec9ba22f24d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:58:53,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ead7d-262b-4111-91b1-3ec9ba22f24d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:58:53,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ead7d-262b-4111-91b1-3ec9ba22f24d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:58:53,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:58:53,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 00:58:53,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:58:53,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:58:56,653 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:58:56,653 INFO L299 CfgBuilder]: Removed 181 assume(true) statements. [2021-11-07 00:58:56,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:58:56 BoogieIcfgContainer [2021-11-07 00:58:56,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:58:56,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:58:56,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:58:56,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:58:56,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:58:52" (1/3) ... [2021-11-07 00:58:56,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313d908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:58:56, skipping insertion in model container [2021-11-07 00:58:56,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:53" (2/3) ... [2021-11-07 00:58:56,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313d908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:58:56, skipping insertion in model container [2021-11-07 00:58:56,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:58:56" (3/3) ... [2021-11-07 00:58:56,669 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.05.cil.c [2021-11-07 00:58:56,679 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:58:56,679 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 00:58:56,740 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:58:56,748 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 [2021-11-07 00:58:56,748 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 00:58:56,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 235 states, 233 states have (on average 1.5493562231759657) internal successors, (361), 234 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:56,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 00:58:56,784 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:56,785 INFO L513 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] [2021-11-07 00:58:56,785 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:58:56,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:56,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1744889203, now seen corresponding path program 1 times [2021-11-07 00:58:56,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:56,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797449734] [2021-11-07 00:58:56,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:56,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:56,991 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:56,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797449734] [2021-11-07 00:58:56,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797449734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:56,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:56,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 00:58:56,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590429610] [2021-11-07 00:58:56,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:58:56,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:57,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:58:57,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:58:57,015 INFO L87 Difference]: Start difference. First operand has 235 states, 233 states have (on average 1.5493562231759657) internal successors, (361), 234 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:57,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:57,217 INFO L93 Difference]: Finished difference Result 669 states and 1025 transitions. [2021-11-07 00:58:57,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:58:57,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 00:58:57,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:57,246 INFO L225 Difference]: With dead ends: 669 [2021-11-07 00:58:57,246 INFO L226 Difference]: Without dead ends: 432 [2021-11-07 00:58:57,252 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:58:57,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-07 00:58:57,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 407. [2021-11-07 00:58:57,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.5024630541871922) internal successors, (610), 406 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:57,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 610 transitions. [2021-11-07 00:58:57,377 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 610 transitions. Word has length 32 [2021-11-07 00:58:57,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:57,377 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 610 transitions. [2021-11-07 00:58:57,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:57,382 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 610 transitions. [2021-11-07 00:58:57,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 00:58:57,385 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:57,385 INFO L513 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] [2021-11-07 00:58:57,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 00:58:57,386 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:58:57,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:57,389 INFO L85 PathProgramCache]: Analyzing trace with hash 778607118, now seen corresponding path program 1 times [2021-11-07 00:58:57,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:57,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112297368] [2021-11-07 00:58:57,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:57,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:57,480 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:57,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112297368] [2021-11-07 00:58:57,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112297368] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:57,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:57,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:58:57,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605688399] [2021-11-07 00:58:57,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:58:57,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:57,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:58:57,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:57,484 INFO L87 Difference]: Start difference. First operand 407 states and 610 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:57,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:57,685 INFO L93 Difference]: Finished difference Result 1340 states and 1997 transitions. [2021-11-07 00:58:57,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:58:57,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 00:58:57,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:57,694 INFO L225 Difference]: With dead ends: 1340 [2021-11-07 00:58:57,694 INFO L226 Difference]: Without dead ends: 938 [2021-11-07 00:58:57,701 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:58:57,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-11-07 00:58:57,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 727. [2021-11-07 00:58:57,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 1.4820936639118458) internal successors, (1076), 726 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:57,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1076 transitions. [2021-11-07 00:58:57,763 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1076 transitions. Word has length 32 [2021-11-07 00:58:57,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:57,764 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 1076 transitions. [2021-11-07 00:58:57,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:57,766 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1076 transitions. [2021-11-07 00:58:57,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 00:58:57,774 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:57,774 INFO L513 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] [2021-11-07 00:58:57,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 00:58:57,775 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:58:57,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:57,776 INFO L85 PathProgramCache]: Analyzing trace with hash 470168109, now seen corresponding path program 1 times [2021-11-07 00:58:57,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:57,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367639694] [2021-11-07 00:58:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:57,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:57,850 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:57,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367639694] [2021-11-07 00:58:57,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367639694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:57,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:57,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:58:57,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241920375] [2021-11-07 00:58:57,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:58:57,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:57,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:58:57,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:57,854 INFO L87 Difference]: Start difference. First operand 727 states and 1076 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:58,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:58,037 INFO L93 Difference]: Finished difference Result 2385 states and 3511 transitions. [2021-11-07 00:58:58,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:58:58,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 00:58:58,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:58,050 INFO L225 Difference]: With dead ends: 2385 [2021-11-07 00:58:58,050 INFO L226 Difference]: Without dead ends: 1670 [2021-11-07 00:58:58,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:58:58,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-11-07 00:58:58,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1312. [2021-11-07 00:58:58,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 1.4622425629290619) internal successors, (1917), 1311 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:58,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1917 transitions. [2021-11-07 00:58:58,119 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1917 transitions. Word has length 32 [2021-11-07 00:58:58,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:58,120 INFO L470 AbstractCegarLoop]: Abstraction has 1312 states and 1917 transitions. [2021-11-07 00:58:58,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:58,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1917 transitions. [2021-11-07 00:58:58,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 00:58:58,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:58,123 INFO L513 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] [2021-11-07 00:58:58,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 00:58:58,123 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:58:58,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:58,124 INFO L85 PathProgramCache]: Analyzing trace with hash 356781452, now seen corresponding path program 1 times [2021-11-07 00:58:58,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:58,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357205673] [2021-11-07 00:58:58,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:58,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:58,192 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:58,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357205673] [2021-11-07 00:58:58,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357205673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:58,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:58,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:58:58,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924801443] [2021-11-07 00:58:58,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:58:58,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:58,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:58:58,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:58,196 INFO L87 Difference]: Start difference. First operand 1312 states and 1917 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:58,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:58,491 INFO L93 Difference]: Finished difference Result 4490 states and 6514 transitions. [2021-11-07 00:58:58,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:58:58,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 00:58:58,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:58,512 INFO L225 Difference]: With dead ends: 4490 [2021-11-07 00:58:58,512 INFO L226 Difference]: Without dead ends: 3197 [2021-11-07 00:58:58,515 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:58:58,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2021-11-07 00:58:58,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 2547. [2021-11-07 00:58:58,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2546 states have (on average 1.4351924587588374) internal successors, (3654), 2546 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:58,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 3654 transitions. [2021-11-07 00:58:58,632 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 3654 transitions. Word has length 32 [2021-11-07 00:58:58,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:58,633 INFO L470 AbstractCegarLoop]: Abstraction has 2547 states and 3654 transitions. [2021-11-07 00:58:58,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:58,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 3654 transitions. [2021-11-07 00:58:58,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 00:58:58,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:58,636 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:58,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 00:58:58,636 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:58:58,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:58,637 INFO L85 PathProgramCache]: Analyzing trace with hash 372458004, now seen corresponding path program 1 times [2021-11-07 00:58:58,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:58,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505638490] [2021-11-07 00:58:58,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:58,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 00:58:58,713 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:58,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505638490] [2021-11-07 00:58:58,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505638490] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:58,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:58,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:58:58,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708517725] [2021-11-07 00:58:58,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:58:58,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:58,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:58:58,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:58,716 INFO L87 Difference]: Start difference. First operand 2547 states and 3654 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:59,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:59,054 INFO L93 Difference]: Finished difference Result 7277 states and 10493 transitions. [2021-11-07 00:58:59,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:58:59,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-07 00:58:59,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:59,088 INFO L225 Difference]: With dead ends: 7277 [2021-11-07 00:58:59,088 INFO L226 Difference]: Without dead ends: 4751 [2021-11-07 00:58:59,096 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:59,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2021-11-07 00:58:59,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 3703. [2021-11-07 00:58:59,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3703 states, 3702 states have (on average 1.440842787682334) internal successors, (5334), 3702 states have internal predecessors, (5334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:59,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 5334 transitions. [2021-11-07 00:58:59,359 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 5334 transitions. Word has length 43 [2021-11-07 00:58:59,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:59,360 INFO L470 AbstractCegarLoop]: Abstraction has 3703 states and 5334 transitions. [2021-11-07 00:58:59,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:59,360 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 5334 transitions. [2021-11-07 00:58:59,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 00:58:59,363 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:59,363 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 00:58:59,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 00:58:59,363 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:58:59,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:59,364 INFO L85 PathProgramCache]: Analyzing trace with hash 243134832, now seen corresponding path program 1 times [2021-11-07 00:58:59,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:58:59,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982160376] [2021-11-07 00:58:59,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:59,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:58:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 00:58:59,439 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:58:59,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982160376] [2021-11-07 00:58:59,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982160376] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:59,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:59,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:58:59,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708232969] [2021-11-07 00:58:59,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:58:59,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:58:59,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:58:59,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:59,442 INFO L87 Difference]: Start difference. First operand 3703 states and 5334 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:59,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:59,978 INFO L93 Difference]: Finished difference Result 12748 states and 18442 transitions. [2021-11-07 00:58:59,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:58:59,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 00:58:59,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:00,044 INFO L225 Difference]: With dead ends: 12748 [2021-11-07 00:59:00,044 INFO L226 Difference]: Without dead ends: 9066 [2021-11-07 00:59:00,055 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:00,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9066 states. [2021-11-07 00:59:00,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9066 to 7027. [2021-11-07 00:59:00,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7027 states, 7026 states have (on average 1.4360945061201253) internal successors, (10090), 7026 states have internal predecessors, (10090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:00,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7027 states to 7027 states and 10090 transitions. [2021-11-07 00:59:00,499 INFO L78 Accepts]: Start accepts. Automaton has 7027 states and 10090 transitions. Word has length 45 [2021-11-07 00:59:00,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:00,501 INFO L470 AbstractCegarLoop]: Abstraction has 7027 states and 10090 transitions. [2021-11-07 00:59:00,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:00,501 INFO L276 IsEmpty]: Start isEmpty. Operand 7027 states and 10090 transitions. [2021-11-07 00:59:00,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 00:59:00,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:00,504 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 00:59:00,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 00:59:00,505 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:59:00,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:00,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1489644268, now seen corresponding path program 1 times [2021-11-07 00:59:00,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:59:00,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707567690] [2021-11-07 00:59:00,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:00,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:59:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 00:59:00,595 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:59:00,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707567690] [2021-11-07 00:59:00,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707567690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:00,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:00,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:59:00,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676966098] [2021-11-07 00:59:00,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:59:00,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:59:00,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:59:00,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:00,598 INFO L87 Difference]: Start difference. First operand 7027 states and 10090 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:01,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:01,516 INFO L93 Difference]: Finished difference Result 24820 states and 35742 transitions. [2021-11-07 00:59:01,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:59:01,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 00:59:01,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:01,600 INFO L225 Difference]: With dead ends: 24820 [2021-11-07 00:59:01,601 INFO L226 Difference]: Without dead ends: 17814 [2021-11-07 00:59:01,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:01,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17814 states. [2021-11-07 00:59:02,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17814 to 13319. [2021-11-07 00:59:02,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13319 states, 13318 states have (on average 1.4303949541973269) internal successors, (19050), 13318 states have internal predecessors, (19050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:02,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13319 states to 13319 states and 19050 transitions. [2021-11-07 00:59:02,504 INFO L78 Accepts]: Start accepts. Automaton has 13319 states and 19050 transitions. Word has length 47 [2021-11-07 00:59:02,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:02,504 INFO L470 AbstractCegarLoop]: Abstraction has 13319 states and 19050 transitions. [2021-11-07 00:59:02,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:02,505 INFO L276 IsEmpty]: Start isEmpty. Operand 13319 states and 19050 transitions. [2021-11-07 00:59:02,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 00:59:02,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:02,508 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 00:59:02,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 00:59:02,508 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:59:02,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:02,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1332546064, now seen corresponding path program 1 times [2021-11-07 00:59:02,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:59:02,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548020764] [2021-11-07 00:59:02,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:02,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:59:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 00:59:02,605 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:59:02,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548020764] [2021-11-07 00:59:02,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548020764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:02,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:02,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 00:59:02,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471142672] [2021-11-07 00:59:02,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:02,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:59:02,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:02,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:02,608 INFO L87 Difference]: Start difference. First operand 13319 states and 19050 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:03,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:03,608 INFO L93 Difference]: Finished difference Result 37403 states and 53500 transitions. [2021-11-07 00:59:03,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:03,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 00:59:03,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:03,680 INFO L225 Difference]: With dead ends: 37403 [2021-11-07 00:59:03,680 INFO L226 Difference]: Without dead ends: 24105 [2021-11-07 00:59:03,701 INFO L786 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 [2021-11-07 00:59:03,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24105 states. [2021-11-07 00:59:04,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24105 to 24103. [2021-11-07 00:59:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24103 states, 24102 states have (on average 1.4263546593643681) internal successors, (34378), 24102 states have internal predecessors, (34378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:05,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24103 states to 24103 states and 34378 transitions. [2021-11-07 00:59:05,058 INFO L78 Accepts]: Start accepts. Automaton has 24103 states and 34378 transitions. Word has length 49 [2021-11-07 00:59:05,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:05,061 INFO L470 AbstractCegarLoop]: Abstraction has 24103 states and 34378 transitions. [2021-11-07 00:59:05,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:05,063 INFO L276 IsEmpty]: Start isEmpty. Operand 24103 states and 34378 transitions. [2021-11-07 00:59:05,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 00:59:05,069 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:05,070 INFO L513 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] [2021-11-07 00:59:05,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 00:59:05,071 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:59:05,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:05,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1725650764, now seen corresponding path program 1 times [2021-11-07 00:59:05,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:59:05,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99423876] [2021-11-07 00:59:05,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:05,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:59:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:05,156 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:59:05,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99423876] [2021-11-07 00:59:05,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99423876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:05,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:05,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:59:05,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247607377] [2021-11-07 00:59:05,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:05,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:59:05,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:05,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:05,160 INFO L87 Difference]: Start difference. First operand 24103 states and 34378 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:06,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:06,543 INFO L93 Difference]: Finished difference Result 58177 states and 83043 transitions. [2021-11-07 00:59:06,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:06,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 00:59:06,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:06,649 INFO L225 Difference]: With dead ends: 58177 [2021-11-07 00:59:06,650 INFO L226 Difference]: Without dead ends: 34095 [2021-11-07 00:59:06,686 INFO L786 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 [2021-11-07 00:59:06,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34095 states. [2021-11-07 00:59:08,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34095 to 25943. [2021-11-07 00:59:08,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25943 states, 25942 states have (on average 1.441137923059132) internal successors, (37386), 25942 states have internal predecessors, (37386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:08,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25943 states to 25943 states and 37386 transitions. [2021-11-07 00:59:08,152 INFO L78 Accepts]: Start accepts. Automaton has 25943 states and 37386 transitions. Word has length 51 [2021-11-07 00:59:08,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:08,153 INFO L470 AbstractCegarLoop]: Abstraction has 25943 states and 37386 transitions. [2021-11-07 00:59:08,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:08,153 INFO L276 IsEmpty]: Start isEmpty. Operand 25943 states and 37386 transitions. [2021-11-07 00:59:08,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 00:59:08,187 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:08,187 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-11-07 00:59:08,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 00:59:08,188 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:59:08,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:08,188 INFO L85 PathProgramCache]: Analyzing trace with hash -387329864, now seen corresponding path program 1 times [2021-11-07 00:59:08,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:59:08,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647846930] [2021-11-07 00:59:08,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:08,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:59:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 00:59:08,272 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:59:08,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647846930] [2021-11-07 00:59:08,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647846930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:08,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:08,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 00:59:08,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579770509] [2021-11-07 00:59:08,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:08,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:59:08,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:08,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:08,276 INFO L87 Difference]: Start difference. First operand 25943 states and 37386 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:09,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:09,568 INFO L93 Difference]: Finished difference Result 63551 states and 91386 transitions. [2021-11-07 00:59:09,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:09,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 00:59:09,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:09,655 INFO L225 Difference]: With dead ends: 63551 [2021-11-07 00:59:09,656 INFO L226 Difference]: Without dead ends: 37616 [2021-11-07 00:59:09,680 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:09,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37616 states. [2021-11-07 00:59:11,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37616 to 37470. [2021-11-07 00:59:11,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37470 states, 37469 states have (on average 1.4238703995302784) internal successors, (53351), 37469 states have internal predecessors, (53351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:11,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37470 states to 37470 states and 53351 transitions. [2021-11-07 00:59:11,323 INFO L78 Accepts]: Start accepts. Automaton has 37470 states and 53351 transitions. Word has length 72 [2021-11-07 00:59:11,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:11,323 INFO L470 AbstractCegarLoop]: Abstraction has 37470 states and 53351 transitions. [2021-11-07 00:59:11,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:11,324 INFO L276 IsEmpty]: Start isEmpty. Operand 37470 states and 53351 transitions. [2021-11-07 00:59:11,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 00:59:11,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:11,369 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-11-07 00:59:11,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 00:59:11,370 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:59:11,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:11,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1295294265, now seen corresponding path program 1 times [2021-11-07 00:59:11,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:59:11,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032819588] [2021-11-07 00:59:11,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:11,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:59:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 00:59:11,454 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:59:11,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032819588] [2021-11-07 00:59:11,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032819588] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:11,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:11,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:59:11,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780171427] [2021-11-07 00:59:11,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:59:11,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:59:11,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:59:11,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:11,457 INFO L87 Difference]: Start difference. First operand 37470 states and 53351 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:14,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:14,172 INFO L93 Difference]: Finished difference Result 117841 states and 166719 transitions. [2021-11-07 00:59:14,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:59:14,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 00:59:14,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:14,382 INFO L225 Difference]: With dead ends: 117841 [2021-11-07 00:59:14,382 INFO L226 Difference]: Without dead ends: 80385 [2021-11-07 00:59:14,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:59:14,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80385 states. [2021-11-07 00:59:17,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80385 to 67285. [2021-11-07 00:59:17,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67285 states, 67284 states have (on average 1.4056833719755069) internal successors, (94580), 67284 states have internal predecessors, (94580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:17,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67285 states to 67285 states and 94580 transitions. [2021-11-07 00:59:17,288 INFO L78 Accepts]: Start accepts. Automaton has 67285 states and 94580 transitions. Word has length 72 [2021-11-07 00:59:17,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:17,289 INFO L470 AbstractCegarLoop]: Abstraction has 67285 states and 94580 transitions. [2021-11-07 00:59:17,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:17,289 INFO L276 IsEmpty]: Start isEmpty. Operand 67285 states and 94580 transitions. [2021-11-07 00:59:17,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 00:59:17,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:17,393 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-11-07 00:59:17,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 00:59:17,394 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:59:17,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:17,395 INFO L85 PathProgramCache]: Analyzing trace with hash -2008508358, now seen corresponding path program 1 times [2021-11-07 00:59:17,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:59:17,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173016851] [2021-11-07 00:59:17,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:17,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:59:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 00:59:17,462 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:59:17,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173016851] [2021-11-07 00:59:17,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173016851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:17,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:17,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:59:17,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930466940] [2021-11-07 00:59:17,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:59:17,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:59:17,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:59:17,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:17,465 INFO L87 Difference]: Start difference. First operand 67285 states and 94580 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:21,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:21,174 INFO L93 Difference]: Finished difference Result 165196 states and 235077 transitions. [2021-11-07 00:59:21,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:59:21,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 00:59:21,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:21,417 INFO L225 Difference]: With dead ends: 165196 [2021-11-07 00:59:21,417 INFO L226 Difference]: Without dead ends: 97930 [2021-11-07 00:59:21,760 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:21,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97930 states. [2021-11-07 00:59:25,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97930 to 96940. [2021-11-07 00:59:25,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96940 states, 96939 states have (on average 1.4258760663922674) internal successors, (138223), 96939 states have internal predecessors, (138223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:26,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96940 states to 96940 states and 138223 transitions. [2021-11-07 00:59:26,155 INFO L78 Accepts]: Start accepts. Automaton has 96940 states and 138223 transitions. Word has length 72 [2021-11-07 00:59:26,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:26,156 INFO L470 AbstractCegarLoop]: Abstraction has 96940 states and 138223 transitions. [2021-11-07 00:59:26,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:26,156 INFO L276 IsEmpty]: Start isEmpty. Operand 96940 states and 138223 transitions. [2021-11-07 00:59:26,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 00:59:26,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:26,215 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-11-07 00:59:26,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 00:59:26,215 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:59:26,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:26,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1119885853, now seen corresponding path program 1 times [2021-11-07 00:59:26,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:59:26,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585063162] [2021-11-07 00:59:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:26,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:59:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:26,284 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:59:26,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585063162] [2021-11-07 00:59:26,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585063162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:26,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:26,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:59:26,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556409130] [2021-11-07 00:59:26,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:59:26,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:59:26,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:59:26,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:26,288 INFO L87 Difference]: Start difference. First operand 96940 states and 138223 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:32,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:32,822 INFO L93 Difference]: Finished difference Result 283886 states and 398584 transitions. [2021-11-07 00:59:32,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:59:32,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 00:59:32,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:33,093 INFO L225 Difference]: With dead ends: 283886 [2021-11-07 00:59:33,093 INFO L226 Difference]: Without dead ends: 146772 [2021-11-07 00:59:33,195 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:33,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146772 states. [2021-11-07 00:59:37,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146772 to 116120. [2021-11-07 00:59:37,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116120 states, 116119 states have (on average 1.3784393596224562) internal successors, (160063), 116119 states have internal predecessors, (160063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:37,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116120 states to 116120 states and 160063 transitions. [2021-11-07 00:59:37,910 INFO L78 Accepts]: Start accepts. Automaton has 116120 states and 160063 transitions. Word has length 73 [2021-11-07 00:59:37,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:37,910 INFO L470 AbstractCegarLoop]: Abstraction has 116120 states and 160063 transitions. [2021-11-07 00:59:37,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:37,911 INFO L276 IsEmpty]: Start isEmpty. Operand 116120 states and 160063 transitions. [2021-11-07 00:59:37,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 00:59:37,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:37,961 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1] [2021-11-07 00:59:37,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 00:59:37,962 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:59:37,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:37,962 INFO L85 PathProgramCache]: Analyzing trace with hash -883880351, now seen corresponding path program 1 times [2021-11-07 00:59:37,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:59:37,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169366946] [2021-11-07 00:59:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:37,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:59:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 00:59:38,051 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:59:38,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169366946] [2021-11-07 00:59:38,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169366946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 00:59:38,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625379196] [2021-11-07 00:59:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:38,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:59:38,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ead7d-262b-4111-91b1-3ec9ba22f24d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:59:38,059 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ead7d-262b-4111-91b1-3ec9ba22f24d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:59:38,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ead7d-262b-4111-91b1-3ec9ba22f24d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 00:59:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:38,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:59:38,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 00:59:38,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 00:59:38,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625379196] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:38,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-07 00:59:38,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5] total 6 [2021-11-07 00:59:38,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983712333] [2021-11-07 00:59:38,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:38,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:59:38,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:38,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:59:38,811 INFO L87 Difference]: Start difference. First operand 116120 states and 160063 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)