/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/transmitter.04.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:28:44,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:28:44,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:28:44,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:28:44,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:28:44,301 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:28:44,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:28:44,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:28:44,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:28:44,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:28:44,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:28:44,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:28:44,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:28:44,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:28:44,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:28:44,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:28:44,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:28:44,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:28:44,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:28:44,314 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:28:44,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:28:44,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:28:44,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:28:44,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:28:44,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:28:44,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:28:44,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:28:44,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:28:44,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:28:44,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:28:44,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:28:44,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:28:44,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:28:44,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:28:44,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:28:44,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:28:44,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:28:44,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:28:44,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:28:44,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:28:44,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:28:44,340 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 01:28:44,365 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:28:44,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:28:44,366 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:28:44,366 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:28:44,366 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:28:44,366 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:28:44,367 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:28:44,367 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:28:44,367 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:28:44,367 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:28:44,367 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:28:44,367 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:28:44,367 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:28:44,367 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:28:44,367 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:28:44,368 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:28:44,368 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:28:44,368 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:28:44,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:28:44,368 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:28:44,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:28:44,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:28:44,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:28:44,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:28:44,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:28:44,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:28:44,369 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:28:44,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:28:44,369 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:28:44,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:28:44,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:28:44,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:28:44,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:28:44,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:28:44,370 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:28:44,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:28:44,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:28:44,370 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:28:44,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:28:44,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:28:44,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:28:44,371 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:28:44,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:28:44,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:28:44,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:28:44,628 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:28:44,628 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:28:44,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/transmitter.04.cil.c [2023-04-03 01:28:45,767 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:28:45,974 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:28:45,974 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/transmitter.04.cil.c [2023-04-03 01:28:45,996 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55dc0f167/12c7e66854854d6a90cc60afe76a84ed/FLAG03a9a690e [2023-04-03 01:28:46,010 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55dc0f167/12c7e66854854d6a90cc60afe76a84ed [2023-04-03 01:28:46,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:28:46,013 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:28:46,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:28:46,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:28:46,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:28:46,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:28:46" (1/1) ... [2023-04-03 01:28:46,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69057bd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:28:46, skipping insertion in model container [2023-04-03 01:28:46,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:28:46" (1/1) ... [2023-04-03 01:28:46,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:28:46,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:28:46,168 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/transmitter.04.cil.c[706,719] [2023-04-03 01:28:46,220 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:28:46,229 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:28:46,238 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/transmitter.04.cil.c[706,719] [2023-04-03 01:28:46,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:28:46,285 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:28:46,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:28:46 WrapperNode [2023-04-03 01:28:46,285 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:28:46,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:28:46,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:28:46,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:28:46,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:28:46" (1/1) ... [2023-04-03 01:28:46,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:28:46" (1/1) ... [2023-04-03 01:28:46,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:28:46" (1/1) ... [2023-04-03 01:28:46,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:28:46" (1/1) ... [2023-04-03 01:28:46,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:28:46" (1/1) ... [2023-04-03 01:28:46,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:28:46" (1/1) ... [2023-04-03 01:28:46,341 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:28:46" (1/1) ... [2023-04-03 01:28:46,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:28:46" (1/1) ... [2023-04-03 01:28:46,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:28:46,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:28:46,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:28:46,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:28:46,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:28:46" (1/1) ... [2023-04-03 01:28:46,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:28:46,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:28:46,398 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 01:28:46,408 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 01:28:46,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:28:46,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:28:46,433 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:28:46,433 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-03 01:28:46,438 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2023-04-03 01:28:46,438 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2023-04-03 01:28:46,438 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2023-04-03 01:28:46,438 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2023-04-03 01:28:46,439 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2023-04-03 01:28:46,439 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2023-04-03 01:28:46,439 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2023-04-03 01:28:46,439 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2023-04-03 01:28:46,439 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2023-04-03 01:28:46,439 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2023-04-03 01:28:46,439 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-04-03 01:28:46,439 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2023-04-03 01:28:46,439 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-04-03 01:28:46,439 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-03 01:28:46,440 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-04-03 01:28:46,440 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-04-03 01:28:46,440 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-04-03 01:28:46,440 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-04-03 01:28:46,440 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2023-04-03 01:28:46,440 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2023-04-03 01:28:46,440 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2023-04-03 01:28:46,440 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2023-04-03 01:28:46,441 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-03 01:28:46,441 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:28:46,441 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:28:46,441 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:28:46,441 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:28:46,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:28:46,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-03 01:28:46,442 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-03 01:28:46,442 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2023-04-03 01:28:46,442 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2023-04-03 01:28:46,442 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2023-04-03 01:28:46,442 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2023-04-03 01:28:46,442 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2023-04-03 01:28:46,442 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-04-03 01:28:46,442 INFO L130 BoogieDeclarations]: Found specification of procedure master [2023-04-03 01:28:46,442 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2023-04-03 01:28:46,442 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2023-04-03 01:28:46,443 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2023-04-03 01:28:46,443 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2023-04-03 01:28:46,444 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-04-03 01:28:46,444 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2023-04-03 01:28:46,444 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-04-03 01:28:46,444 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-03 01:28:46,444 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-04-03 01:28:46,444 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-04-03 01:28:46,445 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-04-03 01:28:46,445 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2023-04-03 01:28:46,445 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2023-04-03 01:28:46,445 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2023-04-03 01:28:46,445 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2023-04-03 01:28:46,445 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-03 01:28:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:28:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:28:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:28:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:28:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:28:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:28:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:28:46,579 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:28:46,581 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:28:47,057 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:28:47,245 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:28:47,245 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-04-03 01:28:47,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:28:47 BoogieIcfgContainer [2023-04-03 01:28:47,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:28:47,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:28:47,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:28:47,258 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:28:47,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:28:46" (1/3) ... [2023-04-03 01:28:47,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b6c727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:28:47, skipping insertion in model container [2023-04-03 01:28:47,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:28:46" (2/3) ... [2023-04-03 01:28:47,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b6c727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:28:47, skipping insertion in model container [2023-04-03 01:28:47,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:28:47" (3/3) ... [2023-04-03 01:28:47,264 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.04.cil.c [2023-04-03 01:28:47,280 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:28:47,281 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:28:47,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:28:47,372 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;@3aa97a20, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:28:47,373 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:28:47,378 INFO L276 IsEmpty]: Start isEmpty. Operand has 157 states, 92 states have (on average 1.4130434782608696) internal successors, (130), 101 states have internal predecessors, (130), 37 states have call successors, (37), 26 states have call predecessors, (37), 26 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-04-03 01:28:47,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-03 01:28:47,390 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:28:47,391 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] [2023-04-03 01:28:47,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:28:47,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:28:47,397 INFO L85 PathProgramCache]: Analyzing trace with hash 632368448, now seen corresponding path program 1 times [2023-04-03 01:28:47,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:28:47,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578212171] [2023-04-03 01:28:47,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:47,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:28:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:47,978 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 01:28:47,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:28:47,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578212171] [2023-04-03 01:28:47,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578212171] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:28:47,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:28:47,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 01:28:47,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975619758] [2023-04-03 01:28:47,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:28:47,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:28:47,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:28:48,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:28:48,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:28:48,020 INFO L87 Difference]: Start difference. First operand has 157 states, 92 states have (on average 1.4130434782608696) internal successors, (130), 101 states have internal predecessors, (130), 37 states have call successors, (37), 26 states have call predecessors, (37), 26 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-03 01:28:48,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:28:48,468 INFO L93 Difference]: Finished difference Result 429 states and 591 transitions. [2023-04-03 01:28:48,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:28:48,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 80 [2023-04-03 01:28:48,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:28:48,480 INFO L225 Difference]: With dead ends: 429 [2023-04-03 01:28:48,480 INFO L226 Difference]: Without dead ends: 276 [2023-04-03 01:28:48,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 01:28:48,487 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 336 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 01:28:48,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 475 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 01:28:48,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2023-04-03 01:28:48,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 272. [2023-04-03 01:28:48,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 166 states have (on average 1.3433734939759037) internal successors, (223), 178 states have internal predecessors, (223), 63 states have call successors, (63), 46 states have call predecessors, (63), 42 states have return successors, (61), 59 states have call predecessors, (61), 60 states have call successors, (61) [2023-04-03 01:28:48,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 347 transitions. [2023-04-03 01:28:48,548 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 347 transitions. Word has length 80 [2023-04-03 01:28:48,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:28:48,548 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 347 transitions. [2023-04-03 01:28:48,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-03 01:28:48,549 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 347 transitions. [2023-04-03 01:28:48,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-03 01:28:48,552 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:28:48,552 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] [2023-04-03 01:28:48,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:28:48,552 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:28:48,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:28:48,553 INFO L85 PathProgramCache]: Analyzing trace with hash 872635777, now seen corresponding path program 1 times [2023-04-03 01:28:48,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:28:48,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652022561] [2023-04-03 01:28:48,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:48,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:28:48,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:48,853 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 01:28:48,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:28:48,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652022561] [2023-04-03 01:28:48,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652022561] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:28:48,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:28:48,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 01:28:48,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334749657] [2023-04-03 01:28:48,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:28:48,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 01:28:48,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:28:48,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 01:28:48,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-03 01:28:48,857 INFO L87 Difference]: Start difference. First operand 272 states and 347 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-03 01:28:49,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:28:49,700 INFO L93 Difference]: Finished difference Result 1139 states and 1541 transitions. [2023-04-03 01:28:49,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:28:49,701 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2023-04-03 01:28:49,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:28:49,708 INFO L225 Difference]: With dead ends: 1139 [2023-04-03 01:28:49,708 INFO L226 Difference]: Without dead ends: 854 [2023-04-03 01:28:49,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:28:49,711 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 1021 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1030 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 01:28:49,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1030 Valid, 948 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 01:28:49,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2023-04-03 01:28:49,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 805. [2023-04-03 01:28:49,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 514 states have (on average 1.3404669260700388) internal successors, (689), 544 states have internal predecessors, (689), 164 states have call successors, (164), 127 states have call predecessors, (164), 126 states have return successors, (191), 168 states have call predecessors, (191), 160 states have call successors, (191) [2023-04-03 01:28:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1044 transitions. [2023-04-03 01:28:49,818 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1044 transitions. Word has length 80 [2023-04-03 01:28:49,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:28:49,819 INFO L495 AbstractCegarLoop]: Abstraction has 805 states and 1044 transitions. [2023-04-03 01:28:49,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-03 01:28:49,819 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1044 transitions. [2023-04-03 01:28:49,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-03 01:28:49,825 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:28:49,825 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] [2023-04-03 01:28:49,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 01:28:49,826 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:28:49,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:28:49,826 INFO L85 PathProgramCache]: Analyzing trace with hash -857701280, now seen corresponding path program 1 times [2023-04-03 01:28:49,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:28:49,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200166396] [2023-04-03 01:28:49,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:49,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:28:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:50,070 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 01:28:50,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:28:50,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200166396] [2023-04-03 01:28:50,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200166396] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:28:50,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:28:50,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 01:28:50,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296996439] [2023-04-03 01:28:50,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:28:50,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 01:28:50,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:28:50,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 01:28:50,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-03 01:28:50,077 INFO L87 Difference]: Start difference. First operand 805 states and 1044 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-03 01:28:50,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:28:50,924 INFO L93 Difference]: Finished difference Result 3162 states and 4423 transitions. [2023-04-03 01:28:50,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:28:50,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2023-04-03 01:28:50,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:28:50,945 INFO L225 Difference]: With dead ends: 3162 [2023-04-03 01:28:50,946 INFO L226 Difference]: Without dead ends: 2299 [2023-04-03 01:28:50,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:28:50,955 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 975 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 985 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:28:50,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [985 Valid, 1005 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 01:28:50,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2299 states. [2023-04-03 01:28:51,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2299 to 2164. [2023-04-03 01:28:51,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 1410 states have (on average 1.3425531914893618) internal successors, (1893), 1494 states have internal predecessors, (1893), 408 states have call successors, (408), 326 states have call predecessors, (408), 345 states have return successors, (557), 444 states have call predecessors, (557), 400 states have call successors, (557) [2023-04-03 01:28:51,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 2858 transitions. [2023-04-03 01:28:51,138 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 2858 transitions. Word has length 80 [2023-04-03 01:28:51,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:28:51,139 INFO L495 AbstractCegarLoop]: Abstraction has 2164 states and 2858 transitions. [2023-04-03 01:28:51,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-03 01:28:51,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 2858 transitions. [2023-04-03 01:28:51,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-03 01:28:51,142 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:28:51,142 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] [2023-04-03 01:28:51,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 01:28:51,143 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:28:51,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:28:51,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1672449407, now seen corresponding path program 1 times [2023-04-03 01:28:51,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:28:51,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012402597] [2023-04-03 01:28:51,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:51,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:28:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:51,392 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 01:28:51,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:28:51,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012402597] [2023-04-03 01:28:51,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012402597] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:28:51,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:28:51,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 01:28:51,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645738965] [2023-04-03 01:28:51,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:28:51,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 01:28:51,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:28:51,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 01:28:51,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-03 01:28:51,396 INFO L87 Difference]: Start difference. First operand 2164 states and 2858 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-03 01:28:52,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:28:52,514 INFO L93 Difference]: Finished difference Result 8410 states and 12254 transitions. [2023-04-03 01:28:52,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:28:52,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 80 [2023-04-03 01:28:52,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:28:52,549 INFO L225 Difference]: With dead ends: 8410 [2023-04-03 01:28:52,550 INFO L226 Difference]: Without dead ends: 6140 [2023-04-03 01:28:52,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:28:52,578 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 980 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:28:52,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [991 Valid, 973 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 01:28:52,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6140 states. [2023-04-03 01:28:53,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6140 to 5505. [2023-04-03 01:28:53,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5505 states, 3636 states have (on average 1.3426842684268427) internal successors, (4882), 3822 states have internal predecessors, (4882), 982 states have call successors, (982), 780 states have call predecessors, (982), 886 states have return successors, (1674), 1153 states have call predecessors, (1674), 959 states have call successors, (1674) [2023-04-03 01:28:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5505 states to 5505 states and 7538 transitions. [2023-04-03 01:28:53,130 INFO L78 Accepts]: Start accepts. Automaton has 5505 states and 7538 transitions. Word has length 80 [2023-04-03 01:28:53,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:28:53,131 INFO L495 AbstractCegarLoop]: Abstraction has 5505 states and 7538 transitions. [2023-04-03 01:28:53,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-03 01:28:53,132 INFO L276 IsEmpty]: Start isEmpty. Operand 5505 states and 7538 transitions. [2023-04-03 01:28:53,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-03 01:28:53,134 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:28:53,135 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:28:53,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 01:28:53,135 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:28:53,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:28:53,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1343857145, now seen corresponding path program 1 times [2023-04-03 01:28:53,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:28:53,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720978598] [2023-04-03 01:28:53,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:53,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:28:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-03 01:28:53,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:28:53,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720978598] [2023-04-03 01:28:53,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720978598] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:28:53,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:28:53,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 01:28:53,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632650515] [2023-04-03 01:28:53,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:28:53,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 01:28:53,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:28:53,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 01:28:53,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:28:53,431 INFO L87 Difference]: Start difference. First operand 5505 states and 7538 transitions. Second operand has 9 states, 7 states have (on average 7.857142857142857) internal successors, (55), 8 states have internal predecessors, (55), 5 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-03 01:28:55,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:28:55,129 INFO L93 Difference]: Finished difference Result 19455 states and 30696 transitions. [2023-04-03 01:28:55,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:28:55,130 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.857142857142857) internal successors, (55), 8 states have internal predecessors, (55), 5 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 96 [2023-04-03 01:28:55,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:28:55,246 INFO L225 Difference]: With dead ends: 19455 [2023-04-03 01:28:55,246 INFO L226 Difference]: Without dead ends: 13967 [2023-04-03 01:28:55,300 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 01:28:55,301 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 710 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:28:55,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 470 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 01:28:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13967 states. [2023-04-03 01:28:56,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13967 to 12564. [2023-04-03 01:28:56,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12564 states, 8406 states have (on average 1.376516773733048) internal successors, (11571), 9061 states have internal predecessors, (11571), 2197 states have call successors, (2197), 1445 states have call predecessors, (2197), 1960 states have return successors, (5508), 2739 states have call predecessors, (5508), 2155 states have call successors, (5508) [2023-04-03 01:28:56,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12564 states to 12564 states and 19276 transitions. [2023-04-03 01:28:56,539 INFO L78 Accepts]: Start accepts. Automaton has 12564 states and 19276 transitions. Word has length 96 [2023-04-03 01:28:56,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:28:56,539 INFO L495 AbstractCegarLoop]: Abstraction has 12564 states and 19276 transitions. [2023-04-03 01:28:56,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.857142857142857) internal successors, (55), 8 states have internal predecessors, (55), 5 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-03 01:28:56,540 INFO L276 IsEmpty]: Start isEmpty. Operand 12564 states and 19276 transitions. [2023-04-03 01:28:56,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-03 01:28:56,547 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:28:56,548 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:28:56,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 01:28:56,548 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:28:56,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:28:56,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1315719207, now seen corresponding path program 1 times [2023-04-03 01:28:56,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:28:56,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914914891] [2023-04-03 01:28:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:28:56,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:28:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:28:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-03 01:28:56,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:28:56,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914914891] [2023-04-03 01:28:56,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914914891] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:28:56,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:28:56,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 01:28:56,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487416690] [2023-04-03 01:28:56,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:28:56,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 01:28:56,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:28:56,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 01:28:56,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:28:56,893 INFO L87 Difference]: Start difference. First operand 12564 states and 19276 transitions. Second operand has 9 states, 7 states have (on average 8.285714285714286) internal successors, (58), 8 states have internal predecessors, (58), 5 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-03 01:28:59,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:28:59,094 INFO L93 Difference]: Finished difference Result 34895 states and 61585 transitions. [2023-04-03 01:28:59,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:28:59,095 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 8.285714285714286) internal successors, (58), 8 states have internal predecessors, (58), 5 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 98 [2023-04-03 01:28:59,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:28:59,231 INFO L225 Difference]: With dead ends: 34895 [2023-04-03 01:28:59,231 INFO L226 Difference]: Without dead ends: 22348 [2023-04-03 01:28:59,338 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 01:28:59,339 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 582 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 01:28:59,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 583 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 01:28:59,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22348 states. [2023-04-03 01:29:01,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22348 to 20476. [2023-04-03 01:29:01,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20476 states, 13896 states have (on average 1.399035693724813) internal successors, (19441), 15260 states have internal predecessors, (19441), 3545 states have call successors, (3545), 2029 states have call predecessors, (3545), 3034 states have return successors, (11404), 4363 states have call predecessors, (11404), 3493 states have call successors, (11404) [2023-04-03 01:29:01,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20476 states to 20476 states and 34390 transitions. [2023-04-03 01:29:01,547 INFO L78 Accepts]: Start accepts. Automaton has 20476 states and 34390 transitions. Word has length 98 [2023-04-03 01:29:01,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:29:01,547 INFO L495 AbstractCegarLoop]: Abstraction has 20476 states and 34390 transitions. [2023-04-03 01:29:01,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 8.285714285714286) internal successors, (58), 8 states have internal predecessors, (58), 5 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-03 01:29:01,548 INFO L276 IsEmpty]: Start isEmpty. Operand 20476 states and 34390 transitions. [2023-04-03 01:29:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-03 01:29:01,550 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:29:01,550 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:29:01,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 01:29:01,551 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:29:01,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:29:01,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1026687095, now seen corresponding path program 1 times [2023-04-03 01:29:01,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:29:01,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376915064] [2023-04-03 01:29:01,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:29:01,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:29:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:29:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 01:29:01,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:29:01,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376915064] [2023-04-03 01:29:01,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376915064] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:29:01,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:29:01,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 01:29:01,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813969300] [2023-04-03 01:29:01,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:29:01,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 01:29:01,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:29:01,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 01:29:01,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:29:01,781 INFO L87 Difference]: Start difference. First operand 20476 states and 34390 transitions. Second operand has 9 states, 7 states have (on average 8.714285714285714) internal successors, (61), 8 states have internal predecessors, (61), 5 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-03 01:29:07,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:29:07,691 INFO L93 Difference]: Finished difference Result 79068 states and 181057 transitions. [2023-04-03 01:29:07,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:29:07,692 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 8.714285714285714) internal successors, (61), 8 states have internal predecessors, (61), 5 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2023-04-03 01:29:07,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:29:08,336 INFO L225 Difference]: With dead ends: 79068 [2023-04-03 01:29:08,337 INFO L226 Difference]: Without dead ends: 58609 [2023-04-03 01:29:08,553 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 01:29:08,554 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 580 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:29:08,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 575 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 01:29:08,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58609 states. [2023-04-03 01:29:13,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58609 to 47656. [2023-04-03 01:29:13,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47656 states, 33432 states have (on average 1.4225891361569754) internal successors, (47560), 36939 states have internal predecessors, (47560), 7781 states have call successors, (7781), 3809 states have call predecessors, (7781), 6442 states have return successors, (37833), 9355 states have call predecessors, (37833), 7681 states have call successors, (37833) [2023-04-03 01:29:14,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47656 states to 47656 states and 93174 transitions. [2023-04-03 01:29:14,714 INFO L78 Accepts]: Start accepts. Automaton has 47656 states and 93174 transitions. Word has length 100 [2023-04-03 01:29:14,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:29:14,714 INFO L495 AbstractCegarLoop]: Abstraction has 47656 states and 93174 transitions. [2023-04-03 01:29:14,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 8.714285714285714) internal successors, (61), 8 states have internal predecessors, (61), 5 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-03 01:29:14,715 INFO L276 IsEmpty]: Start isEmpty. Operand 47656 states and 93174 transitions. [2023-04-03 01:29:14,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-04-03 01:29:14,720 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:29:14,720 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:29:14,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 01:29:14,720 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:29:14,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:29:14,721 INFO L85 PathProgramCache]: Analyzing trace with hash 646908985, now seen corresponding path program 1 times [2023-04-03 01:29:14,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:29:14,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4023509] [2023-04-03 01:29:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:29:14,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:29:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:29:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 01:29:15,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:29:15,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4023509] [2023-04-03 01:29:15,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4023509] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:29:15,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:29:15,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 01:29:15,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661814792] [2023-04-03 01:29:15,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:29:15,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 01:29:15,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:29:15,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 01:29:15,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:29:15,158 INFO L87 Difference]: Start difference. First operand 47656 states and 93174 transitions. Second operand has 9 states, 7 states have (on average 9.142857142857142) internal successors, (64), 8 states have internal predecessors, (64), 5 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-03 01:29:25,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:29:25,383 INFO L93 Difference]: Finished difference Result 137400 states and 347409 transitions. [2023-04-03 01:29:25,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:29:25,384 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 9.142857142857142) internal successors, (64), 8 states have internal predecessors, (64), 5 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 102 [2023-04-03 01:29:25,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:29:26,283 INFO L225 Difference]: With dead ends: 137400 [2023-04-03 01:29:26,284 INFO L226 Difference]: Without dead ends: 89761 [2023-04-03 01:29:27,118 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 01:29:27,118 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 574 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:29:27,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 582 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 01:29:27,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89761 states. [2023-04-03 01:29:35,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89761 to 82638. [2023-04-03 01:29:35,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82638 states, 59548 states have (on average 1.4253039564720897) internal successors, (84874), 66228 states have internal predecessors, (84874), 12694 states have call successors, (12694), 5339 states have call predecessors, (12694), 10395 states have return successors, (86232), 15089 states have call predecessors, (86232), 12570 states have call successors, (86232) [2023-04-03 01:29:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82638 states to 82638 states and 183800 transitions. [2023-04-03 01:29:37,370 INFO L78 Accepts]: Start accepts. Automaton has 82638 states and 183800 transitions. Word has length 102 [2023-04-03 01:29:37,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:29:37,371 INFO L495 AbstractCegarLoop]: Abstraction has 82638 states and 183800 transitions. [2023-04-03 01:29:37,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 9.142857142857142) internal successors, (64), 8 states have internal predecessors, (64), 5 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-03 01:29:37,371 INFO L276 IsEmpty]: Start isEmpty. Operand 82638 states and 183800 transitions. [2023-04-03 01:29:37,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-03 01:29:37,375 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:29:37,376 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:29:37,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 01:29:37,376 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:29:37,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:29:37,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2022420619, now seen corresponding path program 1 times [2023-04-03 01:29:37,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:29:37,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744386036] [2023-04-03 01:29:37,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:29:37,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:29:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:29:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 01:29:37,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:29:37,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744386036] [2023-04-03 01:29:37,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744386036] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:29:37,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:29:37,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 01:29:37,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010203269] [2023-04-03 01:29:37,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:29:37,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:29:37,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:29:37,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:29:37,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:29:37,450 INFO L87 Difference]: Start difference. First operand 82638 states and 183800 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-04-03 01:29:46,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:29:46,833 INFO L93 Difference]: Finished difference Result 143441 states and 329676 transitions. [2023-04-03 01:29:46,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:29:46,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 104 [2023-04-03 01:29:46,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:29:47,546 INFO L225 Difference]: With dead ends: 143441 [2023-04-03 01:29:47,547 INFO L226 Difference]: Without dead ends: 103052 [2023-04-03 01:29:48,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:29:48,133 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 106 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:29:48,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 432 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:29:48,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103052 states. [2023-04-03 01:29:57,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103052 to 93349. [2023-04-03 01:29:57,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93349 states, 68485 states have (on average 1.4311309045776448) internal successors, (98011), 76111 states have internal predecessors, (98011), 13941 states have call successors, (13941), 5576 states have call predecessors, (13941), 10922 states have return successors, (91775), 16205 states have call predecessors, (91775), 13845 states have call successors, (91775) [2023-04-03 01:29:59,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93349 states to 93349 states and 203727 transitions. [2023-04-03 01:29:59,400 INFO L78 Accepts]: Start accepts. Automaton has 93349 states and 203727 transitions. Word has length 104 [2023-04-03 01:29:59,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:29:59,401 INFO L495 AbstractCegarLoop]: Abstraction has 93349 states and 203727 transitions. [2023-04-03 01:29:59,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-04-03 01:29:59,401 INFO L276 IsEmpty]: Start isEmpty. Operand 93349 states and 203727 transitions. [2023-04-03 01:29:59,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-04-03 01:29:59,415 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:29:59,416 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:29:59,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 01:29:59,416 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:29:59,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:29:59,416 INFO L85 PathProgramCache]: Analyzing trace with hash 547460270, now seen corresponding path program 1 times [2023-04-03 01:29:59,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:29:59,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438814014] [2023-04-03 01:29:59,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:29:59,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:29:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:29:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 14 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-03 01:29:59,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:29:59,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438814014] [2023-04-03 01:29:59,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438814014] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:29:59,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702160281] [2023-04-03 01:29:59,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:29:59,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:29:59,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:29:59,963 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:29:59,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 01:30:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:30:00,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:30:00,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:30:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 01:30:00,238 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:30:00,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702160281] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:30:00,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:30:00,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-03 01:30:00,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191435806] [2023-04-03 01:30:00,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:30:00,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:30:00,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:30:00,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:30:00,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:30:00,240 INFO L87 Difference]: Start difference. First operand 93349 states and 203727 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-03 01:30:13,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:30:13,630 INFO L93 Difference]: Finished difference Result 202291 states and 498371 transitions. [2023-04-03 01:30:13,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:30:13,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 166 [2023-04-03 01:30:13,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:30:14,443 INFO L225 Difference]: With dead ends: 202291 [2023-04-03 01:30:14,443 INFO L226 Difference]: Without dead ends: 108959 [2023-04-03 01:30:16,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:30:16,047 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 87 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:30:16,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 414 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:30:16,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108959 states. [2023-04-03 01:30:26,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108959 to 101875. [2023-04-03 01:30:26,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101875 states, 75460 states have (on average 1.428412403922608) internal successors, (107788), 83379 states have internal predecessors, (107788), 14825 states have call successors, (14825), 6251 states have call predecessors, (14825), 11589 states have return successors, (89889), 17035 states have call predecessors, (89889), 14729 states have call successors, (89889) [2023-04-03 01:30:28,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101875 states to 101875 states and 212502 transitions. [2023-04-03 01:30:28,277 INFO L78 Accepts]: Start accepts. Automaton has 101875 states and 212502 transitions. Word has length 166 [2023-04-03 01:30:28,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:30:28,278 INFO L495 AbstractCegarLoop]: Abstraction has 101875 states and 212502 transitions. [2023-04-03 01:30:28,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-03 01:30:28,278 INFO L276 IsEmpty]: Start isEmpty. Operand 101875 states and 212502 transitions. [2023-04-03 01:30:28,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-03 01:30:28,291 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:30:28,291 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-03 01:30:28,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 01:30:28,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-03 01:30:28,500 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:30:28,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:30:28,500 INFO L85 PathProgramCache]: Analyzing trace with hash 501990120, now seen corresponding path program 1 times [2023-04-03 01:30:28,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:30:28,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735190368] [2023-04-03 01:30:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:30:28,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:30:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:30:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-03 01:30:28,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:30:28,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735190368] [2023-04-03 01:30:28,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735190368] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:30:28,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:30:28,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 01:30:28,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893648394] [2023-04-03 01:30:28,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:30:28,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:30:28,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:30:28,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:30:28,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:30:28,669 INFO L87 Difference]: Start difference. First operand 101875 states and 212502 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-04-03 01:30:37,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:30:37,521 INFO L93 Difference]: Finished difference Result 151910 states and 322962 transitions. [2023-04-03 01:30:37,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:30:37,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 132 [2023-04-03 01:30:37,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:30:38,289 INFO L225 Difference]: With dead ends: 151910 [2023-04-03 01:30:38,289 INFO L226 Difference]: Without dead ends: 85840 [2023-04-03 01:30:39,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:30:39,112 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 149 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:30:39,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 315 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:30:39,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85840 states. [2023-04-03 01:30:48,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85840 to 85840. [2023-04-03 01:30:48,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85840 states, 63310 states have (on average 1.4193492339282894) internal successors, (89859), 70617 states have internal predecessors, (89859), 12880 states have call successors, (12880), 5269 states have call predecessors, (12880), 9649 states have return successors, (73854), 14082 states have call predecessors, (73854), 12848 states have call successors, (73854) [2023-04-03 01:30:50,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85840 states to 85840 states and 176593 transitions. [2023-04-03 01:30:50,225 INFO L78 Accepts]: Start accepts. Automaton has 85840 states and 176593 transitions. Word has length 132 [2023-04-03 01:30:50,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:30:50,226 INFO L495 AbstractCegarLoop]: Abstraction has 85840 states and 176593 transitions. [2023-04-03 01:30:50,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-04-03 01:30:50,226 INFO L276 IsEmpty]: Start isEmpty. Operand 85840 states and 176593 transitions. [2023-04-03 01:30:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-04-03 01:30:50,255 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:30:50,255 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:30:50,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 01:30:50,255 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:30:50,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:30:50,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1264499876, now seen corresponding path program 1 times [2023-04-03 01:30:50,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:30:50,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71905019] [2023-04-03 01:30:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:30:50,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:30:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:30:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-04-03 01:30:50,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:30:50,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71905019] [2023-04-03 01:30:50,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71905019] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:30:50,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:30:50,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 01:30:50,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464285117] [2023-04-03 01:30:50,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:30:50,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 01:30:50,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:30:50,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 01:30:50,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:30:50,419 INFO L87 Difference]: Start difference. First operand 85840 states and 176593 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 4 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-04-03 01:31:15,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:31:15,581 INFO L93 Difference]: Finished difference Result 296142 states and 729759 transitions. [2023-04-03 01:31:15,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:31:15,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 4 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 151 [2023-04-03 01:31:15,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:31:18,079 INFO L225 Difference]: With dead ends: 296142 [2023-04-03 01:31:18,082 INFO L226 Difference]: Without dead ends: 210318 [2023-04-03 01:31:20,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:31:20,132 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 423 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 01:31:20,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 347 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 01:31:20,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210318 states. [2023-04-03 01:31:46,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210318 to 193184. [2023-04-03 01:31:46,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193184 states, 145529 states have (on average 1.439761147262745) internal successors, (209527), 163407 states have internal predecessors, (209527), 29993 states have call successors, (29993), 10531 states have call predecessors, (29993), 17661 states have return successors, (174595), 28919 states have call predecessors, (174595), 29947 states have call successors, (174595) [2023-04-03 01:31:51,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193184 states to 193184 states and 414115 transitions. [2023-04-03 01:31:51,090 INFO L78 Accepts]: Start accepts. Automaton has 193184 states and 414115 transitions. Word has length 151 [2023-04-03 01:31:51,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:31:51,091 INFO L495 AbstractCegarLoop]: Abstraction has 193184 states and 414115 transitions. [2023-04-03 01:31:51,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 4 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-04-03 01:31:51,091 INFO L276 IsEmpty]: Start isEmpty. Operand 193184 states and 414115 transitions. [2023-04-03 01:31:51,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-04-03 01:31:51,118 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:31:51,119 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:31:51,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 01:31:51,119 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:31:51,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:31:51,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1326519450, now seen corresponding path program 1 times [2023-04-03 01:31:51,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:31:51,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519330631] [2023-04-03 01:31:51,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:51,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:31:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-04-03 01:31:51,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:31:51,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519330631] [2023-04-03 01:31:51,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519330631] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:31:51,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27685623] [2023-04-03 01:31:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:31:51,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:31:51,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:31:51,207 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:31:51,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 01:31:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:31:51,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:31:51,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:31:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:31:51,449 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:31:51,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27685623] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:31:51,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:31:51,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-04-03 01:31:51,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763033078] [2023-04-03 01:31:51,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:31:51,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:31:51,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:31:51,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:31:51,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:31:51,451 INFO L87 Difference]: Start difference. First operand 193184 states and 414115 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24)