/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/systemc/kundu2.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:21:14,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:21:14,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:21:14,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:21:14,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:21:14,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:21:14,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:21:14,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:21:14,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:21:14,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:21:14,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:21:14,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:21:14,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:21:14,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:21:14,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:21:14,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:21:14,243 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:21:14,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:21:14,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:21:14,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:21:14,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:21:14,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:21:14,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:21:14,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:21:14,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:21:14,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:21:14,256 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:21:14,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:21:14,257 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:21:14,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:21:14,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:21:14,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:21:14,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:21:14,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:21:14,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:21:14,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:21:14,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:21:14,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:21:14,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:21:14,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:21:14,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:21:14,264 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 01:21:14,286 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:21:14,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:21:14,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:21:14,286 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:21:14,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:21:14,287 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:21:14,287 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:21:14,287 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:21:14,287 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:21:14,287 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:21:14,288 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:21:14,288 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:21:14,288 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:21:14,288 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:21:14,288 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:21:14,288 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:21:14,289 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:21:14,289 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:21:14,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:21:14,289 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:21:14,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:21:14,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:21:14,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:21:14,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:21:14,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:21:14,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:21:14,290 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:21:14,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:21:14,290 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:21:14,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:21:14,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:21:14,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:21:14,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:21:14,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:21:14,290 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:21:14,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:21:14,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:21:14,291 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:21:14,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:21:14,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:21:14,291 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:21:14,291 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:21:14,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:21:14,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:21:14,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:21:14,493 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:21:14,493 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:21:14,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/kundu2.cil.c [2023-04-03 01:21:15,406 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:21:15,569 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:21:15,569 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/kundu2.cil.c [2023-04-03 01:21:15,577 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95d8245b6/7aa615b9682446648a2621539cad3eb9/FLAG63fb75cbd [2023-04-03 01:21:15,965 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95d8245b6/7aa615b9682446648a2621539cad3eb9 [2023-04-03 01:21:15,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:21:15,969 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:21:15,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:21:15,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:21:15,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:21:15,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:21:15" (1/1) ... [2023-04-03 01:21:15,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3958dfa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:21:15, skipping insertion in model container [2023-04-03 01:21:15,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:21:15" (1/1) ... [2023-04-03 01:21:15,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:21:16,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:21:16,131 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/kundu2.cil.c[636,649] [2023-04-03 01:21:16,196 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:21:16,203 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:21:16,214 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/kundu2.cil.c[636,649] [2023-04-03 01:21:16,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:21:16,258 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:21:16,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:21:16 WrapperNode [2023-04-03 01:21:16,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:21:16,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:21:16,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:21:16,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:21:16,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:21:16" (1/1) ... [2023-04-03 01:21:16,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:21:16" (1/1) ... [2023-04-03 01:21:16,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:21:16" (1/1) ... [2023-04-03 01:21:16,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:21:16" (1/1) ... [2023-04-03 01:21:16,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:21:16" (1/1) ... [2023-04-03 01:21:16,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:21:16" (1/1) ... [2023-04-03 01:21:16,311 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:21:16" (1/1) ... [2023-04-03 01:21:16,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:21:16" (1/1) ... [2023-04-03 01:21:16,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:21:16,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:21:16,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:21:16,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:21:16,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:21:16" (1/1) ... [2023-04-03 01:21:16,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:21:16,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:21:16,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 01:21:16,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 01:21:16,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:21:16,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:21:16,359 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:21:16,359 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-03 01:21:16,359 INFO L138 BoogieDeclarations]: Found implementation of procedure read_data [2023-04-03 01:21:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure write_data [2023-04-03 01:21:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure P_1 [2023-04-03 01:21:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure is_P_1_triggered [2023-04-03 01:21:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure P_2 [2023-04-03 01:21:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure is_P_2_triggered [2023-04-03 01:21:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure C_1 [2023-04-03 01:21:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure is_C_1_triggered [2023-04-03 01:21:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-04-03 01:21:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2023-04-03 01:21:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-04-03 01:21:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-03 01:21:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-04-03 01:21:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-04-03 01:21:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2023-04-03 01:21:16,361 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2023-04-03 01:21:16,361 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-04-03 01:21:16,361 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-04-03 01:21:16,361 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2023-04-03 01:21:16,361 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-03 01:21:16,361 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2023-04-03 01:21:16,361 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:21:16,361 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:21:16,361 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:21:16,361 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:21:16,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:21:16,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-03 01:21:16,361 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-03 01:21:16,361 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-04-03 01:21:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure read_data [2023-04-03 01:21:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure write_data [2023-04-03 01:21:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure P_1 [2023-04-03 01:21:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure is_P_1_triggered [2023-04-03 01:21:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure P_2 [2023-04-03 01:21:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure is_P_2_triggered [2023-04-03 01:21:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure C_1 [2023-04-03 01:21:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure is_C_1_triggered [2023-04-03 01:21:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-04-03 01:21:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2023-04-03 01:21:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-04-03 01:21:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-03 01:21:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-04-03 01:21:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-04-03 01:21:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2023-04-03 01:21:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2023-04-03 01:21:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-04-03 01:21:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2023-04-03 01:21:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-03 01:21:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2023-04-03 01:21:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:21:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:21:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:21:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:21:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:21:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:21:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:21:16,423 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:21:16,424 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:21:16,751 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:21:16,825 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:21:16,825 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-03 01:21:16,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:21:16 BoogieIcfgContainer [2023-04-03 01:21:16,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:21:16,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:21:16,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:21:16,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:21:16,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:21:15" (1/3) ... [2023-04-03 01:21:16,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51fa0a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:21:16, skipping insertion in model container [2023-04-03 01:21:16,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:21:16" (2/3) ... [2023-04-03 01:21:16,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51fa0a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:21:16, skipping insertion in model container [2023-04-03 01:21:16,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:21:16" (3/3) ... [2023-04-03 01:21:16,832 INFO L112 eAbstractionObserver]: Analyzing ICFG kundu2.cil.c [2023-04-03 01:21:16,844 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:21:16,844 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:21:16,886 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:21:16,891 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@26115879, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:21:16,891 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:21:16,895 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 86 states have (on average 1.372093023255814) internal successors, (118), 94 states have internal predecessors, (118), 35 states have call successors, (35), 24 states have call predecessors, (35), 24 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-04-03 01:21:16,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-03 01:21:16,902 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:21:16,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:21:16,902 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:21:16,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:21:16,906 INFO L85 PathProgramCache]: Analyzing trace with hash -858478552, now seen corresponding path program 1 times [2023-04-03 01:21:16,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:21:16,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714670317] [2023-04-03 01:21:16,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:21:16,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:21:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:21:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:21:17,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:21:17,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714670317] [2023-04-03 01:21:17,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714670317] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:21:17,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:21:17,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 01:21:17,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789275231] [2023-04-03 01:21:17,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:21:17,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 01:21:17,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:21:17,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 01:21:17,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-03 01:21:17,263 INFO L87 Difference]: Start difference. First operand has 147 states, 86 states have (on average 1.372093023255814) internal successors, (118), 94 states have internal predecessors, (118), 35 states have call successors, (35), 24 states have call predecessors, (35), 24 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 4 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-03 01:21:18,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:21:18,225 INFO L93 Difference]: Finished difference Result 1136 states and 1674 transitions. [2023-04-03 01:21:18,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-03 01:21:18,227 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 4 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 66 [2023-04-03 01:21:18,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:21:18,241 INFO L225 Difference]: With dead ends: 1136 [2023-04-03 01:21:18,241 INFO L226 Difference]: Without dead ends: 957 [2023-04-03 01:21:18,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:21:18,247 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 1013 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 01:21:18,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1031 Valid, 1298 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 01:21:18,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2023-04-03 01:21:18,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 869. [2023-04-03 01:21:18,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 540 states have (on average 1.3074074074074074) internal successors, (706), 579 states have internal predecessors, (706), 189 states have call successors, (189), 143 states have call predecessors, (189), 139 states have return successors, (296), 178 states have call predecessors, (296), 184 states have call successors, (296) [2023-04-03 01:21:18,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1191 transitions. [2023-04-03 01:21:18,339 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1191 transitions. Word has length 66 [2023-04-03 01:21:18,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:21:18,340 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1191 transitions. [2023-04-03 01:21:18,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 4 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-03 01:21:18,340 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1191 transitions. [2023-04-03 01:21:18,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-03 01:21:18,342 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:21:18,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:21:18,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:21:18,342 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:21:18,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:21:18,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1918885713, now seen corresponding path program 1 times [2023-04-03 01:21:18,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:21:18,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737246689] [2023-04-03 01:21:18,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:21:18,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:21:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:21:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:21:18,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:21:18,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737246689] [2023-04-03 01:21:18,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737246689] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:21:18,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:21:18,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 01:21:18,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066076681] [2023-04-03 01:21:18,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:21:18,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:21:18,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:21:18,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:21:18,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:21:18,471 INFO L87 Difference]: Start difference. First operand 869 states and 1191 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-04-03 01:21:18,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:21:18,691 INFO L93 Difference]: Finished difference Result 2146 states and 3156 transitions. [2023-04-03 01:21:18,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:21:18,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 67 [2023-04-03 01:21:18,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:21:18,699 INFO L225 Difference]: With dead ends: 2146 [2023-04-03 01:21:18,700 INFO L226 Difference]: Without dead ends: 1293 [2023-04-03 01:21:18,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:21:18,709 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 299 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:21:18,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 573 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:21:18,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2023-04-03 01:21:18,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1245. [2023-04-03 01:21:18,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 775 states have (on average 1.2748387096774194) internal successors, (988), 833 states have internal predecessors, (988), 269 states have call successors, (269), 206 states have call predecessors, (269), 200 states have return successors, (401), 252 states have call predecessors, (401), 264 states have call successors, (401) [2023-04-03 01:21:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1658 transitions. [2023-04-03 01:21:18,786 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1658 transitions. Word has length 67 [2023-04-03 01:21:18,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:21:18,786 INFO L495 AbstractCegarLoop]: Abstraction has 1245 states and 1658 transitions. [2023-04-03 01:21:18,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-04-03 01:21:18,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1658 transitions. [2023-04-03 01:21:18,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-03 01:21:18,787 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:21:18,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:21:18,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 01:21:18,787 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:21:18,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:21:18,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1404406896, now seen corresponding path program 1 times [2023-04-03 01:21:18,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:21:18,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032778672] [2023-04-03 01:21:18,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:21:18,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:21:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:21:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:21:18,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:21:18,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032778672] [2023-04-03 01:21:18,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032778672] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:21:18,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:21:18,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 01:21:18,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742314153] [2023-04-03 01:21:18,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:21:18,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 01:21:18,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:21:18,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 01:21:18,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:21:18,898 INFO L87 Difference]: Start difference. First operand 1245 states and 1658 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-04-03 01:21:19,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:21:19,045 INFO L93 Difference]: Finished difference Result 2832 states and 3926 transitions. [2023-04-03 01:21:19,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 01:21:19,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2023-04-03 01:21:19,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:21:19,054 INFO L225 Difference]: With dead ends: 2832 [2023-04-03 01:21:19,054 INFO L226 Difference]: Without dead ends: 1604 [2023-04-03 01:21:19,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:21:19,064 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 123 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:21:19,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 584 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:21:19,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2023-04-03 01:21:19,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1559. [2023-04-03 01:21:19,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 969 states have (on average 1.2714138286893706) internal successors, (1232), 1047 states have internal predecessors, (1232), 336 states have call successors, (336), 260 states have call predecessors, (336), 253 states have return successors, (534), 310 states have call predecessors, (534), 331 states have call successors, (534) [2023-04-03 01:21:19,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 2102 transitions. [2023-04-03 01:21:19,142 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 2102 transitions. Word has length 67 [2023-04-03 01:21:19,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:21:19,143 INFO L495 AbstractCegarLoop]: Abstraction has 1559 states and 2102 transitions. [2023-04-03 01:21:19,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-04-03 01:21:19,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 2102 transitions. [2023-04-03 01:21:19,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-03 01:21:19,149 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:21:19,149 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:21:19,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 01:21:19,149 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:21:19,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:21:19,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1330749001, now seen corresponding path program 1 times [2023-04-03 01:21:19,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:21:19,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112433042] [2023-04-03 01:21:19,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:21:19,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:21:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:21:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:21:19,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:21:19,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112433042] [2023-04-03 01:21:19,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112433042] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:21:19,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:21:19,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 01:21:19,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932472722] [2023-04-03 01:21:19,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:21:19,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 01:21:19,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:21:19,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 01:21:19,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:21:19,390 INFO L87 Difference]: Start difference. First operand 1559 states and 2102 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-04-03 01:21:20,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:21:20,094 INFO L93 Difference]: Finished difference Result 5061 states and 7800 transitions. [2023-04-03 01:21:20,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-03 01:21:20,095 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 80 [2023-04-03 01:21:20,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:21:20,113 INFO L225 Difference]: With dead ends: 5061 [2023-04-03 01:21:20,113 INFO L226 Difference]: Without dead ends: 3613 [2023-04-03 01:21:20,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-04-03 01:21:20,127 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 498 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 01:21:20,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 982 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 01:21:20,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2023-04-03 01:21:20,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 3511. [2023-04-03 01:21:20,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3511 states, 2232 states have (on average 1.3270609318996416) internal successors, (2962), 2520 states have internal predecessors, (2962), 732 states have call successors, (732), 488 states have call predecessors, (732), 546 states have return successors, (1583), 698 states have call predecessors, (1583), 727 states have call successors, (1583) [2023-04-03 01:21:20,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 5277 transitions. [2023-04-03 01:21:20,395 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 5277 transitions. Word has length 80 [2023-04-03 01:21:20,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:21:20,397 INFO L495 AbstractCegarLoop]: Abstraction has 3511 states and 5277 transitions. [2023-04-03 01:21:20,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-04-03 01:21:20,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 5277 transitions. [2023-04-03 01:21:20,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-03 01:21:20,398 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:21:20,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:21:20,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 01:21:20,398 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:21:20,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:21:20,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1825005504, now seen corresponding path program 1 times [2023-04-03 01:21:20,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:21:20,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701951922] [2023-04-03 01:21:20,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:21:20,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:21:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:21:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:21:20,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:21:20,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701951922] [2023-04-03 01:21:20,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701951922] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:21:20,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:21:20,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 01:21:20,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352820823] [2023-04-03 01:21:20,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:21:20,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 01:21:20,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:21:20,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 01:21:20,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:21:20,592 INFO L87 Difference]: Start difference. First operand 3511 states and 5277 transitions. Second operand has 9 states, 7 states have (on average 7.571428571428571) internal successors, (53), 8 states have internal predecessors, (53), 5 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-03 01:21:21,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:21:21,556 INFO L93 Difference]: Finished difference Result 12068 states and 24291 transitions. [2023-04-03 01:21:21,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:21:21,557 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.571428571428571) internal successors, (53), 8 states have internal predecessors, (53), 5 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 85 [2023-04-03 01:21:21,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:21:21,614 INFO L225 Difference]: With dead ends: 12068 [2023-04-03 01:21:21,614 INFO L226 Difference]: Without dead ends: 8574 [2023-04-03 01:21:21,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-04-03 01:21:21,657 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 508 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 01:21:21,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 404 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 01:21:21,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8574 states. [2023-04-03 01:21:22,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8574 to 7259. [2023-04-03 01:21:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7259 states, 4712 states have (on average 1.3510186757215619) internal successors, (6366), 5349 states have internal predecessors, (6366), 1493 states have call successors, (1493), 901 states have call predecessors, (1493), 1053 states have return successors, (4936), 1453 states have call predecessors, (4936), 1488 states have call successors, (4936) [2023-04-03 01:21:22,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7259 states to 7259 states and 12795 transitions. [2023-04-03 01:21:22,342 INFO L78 Accepts]: Start accepts. Automaton has 7259 states and 12795 transitions. Word has length 85 [2023-04-03 01:21:22,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:21:22,342 INFO L495 AbstractCegarLoop]: Abstraction has 7259 states and 12795 transitions. [2023-04-03 01:21:22,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.571428571428571) internal successors, (53), 8 states have internal predecessors, (53), 5 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-03 01:21:22,343 INFO L276 IsEmpty]: Start isEmpty. Operand 7259 states and 12795 transitions. [2023-04-03 01:21:22,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 01:21:22,344 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:21:22,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:21:22,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 01:21:22,345 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:21:22,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:21:22,345 INFO L85 PathProgramCache]: Analyzing trace with hash 204086642, now seen corresponding path program 1 times [2023-04-03 01:21:22,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:21:22,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314454654] [2023-04-03 01:21:22,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:21:22,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:21:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:21:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:21:22,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:21:22,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314454654] [2023-04-03 01:21:22,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314454654] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:21:22,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:21:22,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 01:21:22,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080193459] [2023-04-03 01:21:22,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:21:22,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 01:21:22,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:21:22,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 01:21:22,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:21:22,596 INFO L87 Difference]: Start difference. First operand 7259 states and 12795 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-04-03 01:21:23,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:21:23,531 INFO L93 Difference]: Finished difference Result 12408 states and 24219 transitions. [2023-04-03 01:21:23,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-03 01:21:23,531 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 86 [2023-04-03 01:21:23,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:21:23,586 INFO L225 Difference]: With dead ends: 12408 [2023-04-03 01:21:23,586 INFO L226 Difference]: Without dead ends: 7417 [2023-04-03 01:21:23,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-04-03 01:21:23,631 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 589 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 01:21:23,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 870 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 01:21:23,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7417 states. [2023-04-03 01:21:24,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7417 to 7253. [2023-04-03 01:21:24,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7253 states, 4706 states have (on average 1.3489162770930727) internal successors, (6348), 5343 states have internal predecessors, (6348), 1493 states have call successors, (1493), 901 states have call predecessors, (1493), 1053 states have return successors, (4936), 1453 states have call predecessors, (4936), 1488 states have call successors, (4936) [2023-04-03 01:21:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7253 states to 7253 states and 12777 transitions. [2023-04-03 01:21:24,239 INFO L78 Accepts]: Start accepts. Automaton has 7253 states and 12777 transitions. Word has length 86 [2023-04-03 01:21:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:21:24,239 INFO L495 AbstractCegarLoop]: Abstraction has 7253 states and 12777 transitions. [2023-04-03 01:21:24,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-04-03 01:21:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand 7253 states and 12777 transitions. [2023-04-03 01:21:24,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 01:21:24,241 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:21:24,241 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:21:24,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 01:21:24,241 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:21:24,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:21:24,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2007619246, now seen corresponding path program 1 times [2023-04-03 01:21:24,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:21:24,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078410001] [2023-04-03 01:21:24,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:21:24,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:21:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:21:24,394 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-03 01:21:24,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:21:24,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078410001] [2023-04-03 01:21:24,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078410001] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:21:24,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:21:24,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 01:21:24,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281646374] [2023-04-03 01:21:24,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:21:24,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 01:21:24,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:21:24,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 01:21:24,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:21:24,396 INFO L87 Difference]: Start difference. First operand 7253 states and 12777 transitions. Second operand has 9 states, 7 states have (on average 7.285714285714286) internal successors, (51), 8 states have internal predecessors, (51), 5 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-03 01:21:26,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:21:26,335 INFO L93 Difference]: Finished difference Result 26635 states and 74751 transitions. [2023-04-03 01:21:26,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:21:26,336 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.285714285714286) internal successors, (51), 8 states have internal predecessors, (51), 5 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 87 [2023-04-03 01:21:26,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:21:26,549 INFO L225 Difference]: With dead ends: 26635 [2023-04-03 01:21:26,550 INFO L226 Difference]: Without dead ends: 19399 [2023-04-03 01:21:26,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-04-03 01:21:26,725 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 603 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 01:21:26,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 390 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 01:21:26,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19399 states. [2023-04-03 01:21:28,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19399 to 17122. [2023-04-03 01:21:28,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17122 states, 11474 states have (on average 1.3714484922433328) internal successors, (15736), 13072 states have internal predecessors, (15736), 3399 states have call successors, (3399), 1725 states have call predecessors, (3399), 2248 states have return successors, (19907), 3359 states have call predecessors, (19907), 3394 states have call successors, (19907) [2023-04-03 01:21:28,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17122 states to 17122 states and 39042 transitions. [2023-04-03 01:21:28,862 INFO L78 Accepts]: Start accepts. Automaton has 17122 states and 39042 transitions. Word has length 87 [2023-04-03 01:21:28,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:21:28,862 INFO L495 AbstractCegarLoop]: Abstraction has 17122 states and 39042 transitions. [2023-04-03 01:21:28,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.285714285714286) internal successors, (51), 8 states have internal predecessors, (51), 5 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-03 01:21:28,863 INFO L276 IsEmpty]: Start isEmpty. Operand 17122 states and 39042 transitions. [2023-04-03 01:21:28,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-03 01:21:28,866 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:21:28,866 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:21:28,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 01:21:28,866 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:21:28,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:21:28,867 INFO L85 PathProgramCache]: Analyzing trace with hash 393385054, now seen corresponding path program 1 times [2023-04-03 01:21:28,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:21:28,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101180272] [2023-04-03 01:21:28,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:21:28,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:21:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:21:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 01:21:28,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:21:28,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101180272] [2023-04-03 01:21:28,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101180272] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:21:28,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:21:28,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 01:21:28,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415619757] [2023-04-03 01:21:28,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:21:28,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 01:21:28,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:21:28,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 01:21:28,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-03 01:21:28,940 INFO L87 Difference]: Start difference. First operand 17122 states and 39042 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-04-03 01:21:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:21:31,688 INFO L93 Difference]: Finished difference Result 54720 states and 137356 transitions. [2023-04-03 01:21:31,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-03 01:21:31,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 89 [2023-04-03 01:21:31,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:21:31,896 INFO L225 Difference]: With dead ends: 54720 [2023-04-03 01:21:31,897 INFO L226 Difference]: Without dead ends: 37615 [2023-04-03 01:21:32,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:21:32,126 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 920 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 01:21:32,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [920 Valid, 838 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 01:21:32,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37615 states. [2023-04-03 01:21:34,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37615 to 27771. [2023-04-03 01:21:34,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27771 states, 19704 states have (on average 1.3691128704831506) internal successors, (26977), 21990 states have internal predecessors, (26977), 5041 states have call successors, (5041), 2361 states have call predecessors, (5041), 3025 states have return successors, (23790), 5008 states have call predecessors, (23790), 5036 states have call successors, (23790) [2023-04-03 01:21:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27771 states to 27771 states and 55808 transitions. [2023-04-03 01:21:34,901 INFO L78 Accepts]: Start accepts. Automaton has 27771 states and 55808 transitions. Word has length 89 [2023-04-03 01:21:34,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:21:34,902 INFO L495 AbstractCegarLoop]: Abstraction has 27771 states and 55808 transitions. [2023-04-03 01:21:34,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-04-03 01:21:34,902 INFO L276 IsEmpty]: Start isEmpty. Operand 27771 states and 55808 transitions. [2023-04-03 01:21:34,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-03 01:21:34,905 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:21:34,905 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:21:34,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 01:21:34,906 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:21:34,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:21:34,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1880915131, now seen corresponding path program 1 times [2023-04-03 01:21:34,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:21:34,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110560325] [2023-04-03 01:21:34,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:21:34,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:21:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:21:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 01:21:34,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:21:34,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110560325] [2023-04-03 01:21:34,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110560325] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:21:34,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:21:34,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 01:21:34,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586045866] [2023-04-03 01:21:34,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:21:34,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 01:21:34,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:21:34,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 01:21:34,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:21:34,996 INFO L87 Difference]: Start difference. First operand 27771 states and 55808 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2023-04-03 01:21:38,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:21:38,338 INFO L93 Difference]: Finished difference Result 67145 states and 152209 transitions. [2023-04-03 01:21:38,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 01:21:38,338 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) Word has length 96 [2023-04-03 01:21:38,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:21:38,551 INFO L225 Difference]: With dead ends: 67145 [2023-04-03 01:21:38,552 INFO L226 Difference]: Without dead ends: 42290 [2023-04-03 01:21:39,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-04-03 01:21:39,072 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 259 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:21:39,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 1347 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:21:39,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42290 states. [2023-04-03 01:21:41,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42290 to 41207. [2023-04-03 01:21:41,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41207 states, 29241 states have (on average 1.3674976915974146) internal successors, (39987), 32676 states have internal predecessors, (39987), 7455 states have call successors, (7455), 3462 states have call predecessors, (7455), 4510 states have return successors, (30261), 7484 states have call predecessors, (30261), 7450 states have call successors, (30261) [2023-04-03 01:21:42,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41207 states to 41207 states and 77703 transitions. [2023-04-03 01:21:42,505 INFO L78 Accepts]: Start accepts. Automaton has 41207 states and 77703 transitions. Word has length 96 [2023-04-03 01:21:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:21:42,505 INFO L495 AbstractCegarLoop]: Abstraction has 41207 states and 77703 transitions. [2023-04-03 01:21:42,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2023-04-03 01:21:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 41207 states and 77703 transitions. [2023-04-03 01:21:42,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-03 01:21:42,510 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:21:42,510 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:21:42,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 01:21:42,511 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:21:42,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:21:42,511 INFO L85 PathProgramCache]: Analyzing trace with hash -938367713, now seen corresponding path program 1 times [2023-04-03 01:21:42,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:21:42,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278717026] [2023-04-03 01:21:42,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:21:42,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:21:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:21:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 01:21:42,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:21:42,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278717026] [2023-04-03 01:21:42,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278717026] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:21:42,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:21:42,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 01:21:42,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651945891] [2023-04-03 01:21:42,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:21:42,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 01:21:42,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:21:42,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 01:21:42,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:21:42,675 INFO L87 Difference]: Start difference. First operand 41207 states and 77703 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2023-04-03 01:21:46,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:21:46,826 INFO L93 Difference]: Finished difference Result 88025 states and 183080 transitions. [2023-04-03 01:21:46,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-03 01:21:46,827 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) Word has length 100 [2023-04-03 01:21:46,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:21:47,114 INFO L225 Difference]: With dead ends: 88025 [2023-04-03 01:21:47,114 INFO L226 Difference]: Without dead ends: 52693 [2023-04-03 01:21:47,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-04-03 01:21:47,436 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 259 mSDsluCounter, 1826 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 01:21:47,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 2187 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 01:21:47,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52693 states. [2023-04-03 01:21:51,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52693 to 51874. [2023-04-03 01:21:51,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51874 states, 37094 states have (on average 1.3730252871084272) internal successors, (50931), 41258 states have internal predecessors, (50931), 9288 states have call successors, (9288), 4199 states have call predecessors, (9288), 5491 states have return successors, (43942), 9477 states have call predecessors, (43942), 9283 states have call successors, (43942) [2023-04-03 01:21:51,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51874 states to 51874 states and 104161 transitions. [2023-04-03 01:21:51,865 INFO L78 Accepts]: Start accepts. Automaton has 51874 states and 104161 transitions. Word has length 100 [2023-04-03 01:21:51,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:21:51,865 INFO L495 AbstractCegarLoop]: Abstraction has 51874 states and 104161 transitions. [2023-04-03 01:21:51,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2023-04-03 01:21:51,866 INFO L276 IsEmpty]: Start isEmpty. Operand 51874 states and 104161 transitions. [2023-04-03 01:21:51,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-03 01:21:51,874 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:21:51,874 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:21:51,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 01:21:51,874 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:21:51,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:21:51,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1379499465, now seen corresponding path program 1 times [2023-04-03 01:21:51,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:21:51,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70424780] [2023-04-03 01:21:51,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:21:51,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:21:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:21:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 01:21:52,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:21:52,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70424780] [2023-04-03 01:21:52,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70424780] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:21:52,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:21:52,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 01:21:52,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722850998] [2023-04-03 01:21:52,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:21:52,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 01:21:52,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:21:52,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 01:21:52,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:21:52,010 INFO L87 Difference]: Start difference. First operand 51874 states and 104161 transitions. Second operand has 9 states, 7 states have (on average 8.857142857142858) internal successors, (62), 8 states have internal predecessors, (62), 5 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-04-03 01:22:00,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:22:00,956 INFO L93 Difference]: Finished difference Result 134744 states and 413148 transitions. [2023-04-03 01:22:00,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:22:00,957 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 8.857142857142858) internal successors, (62), 8 states have internal predecessors, (62), 5 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 103 [2023-04-03 01:22:00,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:22:01,814 INFO L225 Difference]: With dead ends: 134744 [2023-04-03 01:22:01,814 INFO L226 Difference]: Without dead ends: 82887 [2023-04-03 01:22:03,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-04-03 01:22:03,115 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 532 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 01:22:03,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 432 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 01:22:03,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82887 states. [2023-04-03 01:22:12,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82887 to 78372. [2023-04-03 01:22:12,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78372 states, 54511 states have (on average 1.3259892498761718) internal successors, (72281), 60488 states have internal predecessors, (72281), 13766 states have call successors, (13766), 6942 states have call predecessors, (13766), 10094 states have return successors, (127975), 14484 states have call predecessors, (127975), 13761 states have call successors, (127975) [2023-04-03 01:22:14,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78372 states to 78372 states and 214022 transitions. [2023-04-03 01:22:14,310 INFO L78 Accepts]: Start accepts. Automaton has 78372 states and 214022 transitions. Word has length 103 [2023-04-03 01:22:14,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:22:14,310 INFO L495 AbstractCegarLoop]: Abstraction has 78372 states and 214022 transitions. [2023-04-03 01:22:14,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 8.857142857142858) internal successors, (62), 8 states have internal predecessors, (62), 5 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-04-03 01:22:14,311 INFO L276 IsEmpty]: Start isEmpty. Operand 78372 states and 214022 transitions. [2023-04-03 01:22:14,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-03 01:22:14,315 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:22:14,315 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:22:14,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 01:22:14,316 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:22:14,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:22:14,316 INFO L85 PathProgramCache]: Analyzing trace with hash -136392156, now seen corresponding path program 1 times [2023-04-03 01:22:14,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:22:14,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863491726] [2023-04-03 01:22:14,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:22:14,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:22:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:22:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 01:22:14,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:22:14,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863491726] [2023-04-03 01:22:14,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863491726] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:22:14,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:22:14,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 01:22:14,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181882916] [2023-04-03 01:22:14,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:22:14,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 01:22:14,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:22:14,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 01:22:14,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:22:14,386 INFO L87 Difference]: Start difference. First operand 78372 states and 214022 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16)