/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/kundu1.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:08:44,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:08:44,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:08:44,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:08:44,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:08:44,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:08:44,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:08:44,417 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:08:44,418 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:08:44,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:08:44,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:08:44,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:08:44,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:08:44,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:08:44,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:08:44,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:08:44,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:08:44,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:08:44,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:08:44,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:08:44,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:08:44,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:08:44,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:08:44,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:08:44,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:08:44,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:08:44,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:08:44,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:08:44,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:08:44,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:08:44,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:08:44,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:08:44,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:08:44,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:08:44,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:08:44,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:08:44,449 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:08:44,449 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:08:44,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:08:44,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:08:44,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:08:44,451 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 [2023-04-01 06:08:44,475 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:08:44,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:08:44,475 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:08:44,476 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:08:44,476 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:08:44,476 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:08:44,476 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:08:44,477 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:08:44,477 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:08:44,477 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:08:44,477 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:08:44,477 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:08:44,477 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:08:44,478 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:08:44,478 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:08:44,478 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:08:44,478 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:08:44,478 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:08:44,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:08:44,478 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:08:44,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:08:44,479 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:08:44,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:08:44,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:08:44,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:08:44,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:08:44,479 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:08:44,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:08:44,479 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:08:44,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:08:44,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:08:44,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:08:44,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:08:44,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:08:44,480 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:08:44,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:08:44,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:08:44,480 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:08:44,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:08:44,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:08:44,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:08:44,481 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:08:44,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:08:44,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:08:44,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:08:44,684 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:08:44,685 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:08:44,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/kundu1.cil.c [2023-04-01 06:08:45,775 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:08:45,928 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:08:45,928 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/kundu1.cil.c [2023-04-01 06:08:45,936 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03b8c6c28/af03542b8d784d2795692192d3e8a422/FLAG31c86d4fe [2023-04-01 06:08:45,948 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03b8c6c28/af03542b8d784d2795692192d3e8a422 [2023-04-01 06:08:45,950 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:08:45,951 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:08:45,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:08:45,952 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:08:45,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:08:45,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:08:45" (1/1) ... [2023-04-01 06:08:45,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ac5fd61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:45, skipping insertion in model container [2023-04-01 06:08:45,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:08:45" (1/1) ... [2023-04-01 06:08:45,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:08:45,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:08:46,075 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/kundu1.cil.c[636,649] [2023-04-01 06:08:46,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:08:46,127 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:08:46,135 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/kundu1.cil.c[636,649] [2023-04-01 06:08:46,165 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:08:46,182 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:08:46,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:46 WrapperNode [2023-04-01 06:08:46,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:08:46,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:08:46,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:08:46,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:08:46,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:46" (1/1) ... [2023-04-01 06:08:46,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:46" (1/1) ... [2023-04-01 06:08:46,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:46" (1/1) ... [2023-04-01 06:08:46,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:46" (1/1) ... [2023-04-01 06:08:46,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:46" (1/1) ... [2023-04-01 06:08:46,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:46" (1/1) ... [2023-04-01 06:08:46,212 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:46" (1/1) ... [2023-04-01 06:08:46,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:46" (1/1) ... [2023-04-01 06:08:46,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:08:46,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:08:46,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:08:46,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:08:46,217 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:46" (1/1) ... [2023-04-01 06:08:46,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:08:46,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:08:46,241 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) [2023-04-01 06:08:46,249 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 [2023-04-01 06:08:46,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:08:46,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:08:46,273 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:08:46,273 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-01 06:08:46,273 INFO L138 BoogieDeclarations]: Found implementation of procedure read_data [2023-04-01 06:08:46,273 INFO L138 BoogieDeclarations]: Found implementation of procedure write_data [2023-04-01 06:08:46,273 INFO L138 BoogieDeclarations]: Found implementation of procedure P_1 [2023-04-01 06:08:46,273 INFO L138 BoogieDeclarations]: Found implementation of procedure is_P_1_triggered [2023-04-01 06:08:46,273 INFO L138 BoogieDeclarations]: Found implementation of procedure C_1 [2023-04-01 06:08:46,273 INFO L138 BoogieDeclarations]: Found implementation of procedure is_C_1_triggered [2023-04-01 06:08:46,273 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-04-01 06:08:46,273 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2023-04-01 06:08:46,273 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-04-01 06:08:46,273 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-01 06:08:46,274 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-04-01 06:08:46,274 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-04-01 06:08:46,274 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2023-04-01 06:08:46,274 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2023-04-01 06:08:46,274 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-04-01 06:08:46,274 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-04-01 06:08:46,274 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2023-04-01 06:08:46,274 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-01 06:08:46,274 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2023-04-01 06:08:46,274 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:08:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:08:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:08:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:08:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:08:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 06:08:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-01 06:08:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-04-01 06:08:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure read_data [2023-04-01 06:08:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure write_data [2023-04-01 06:08:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure P_1 [2023-04-01 06:08:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure is_P_1_triggered [2023-04-01 06:08:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure C_1 [2023-04-01 06:08:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure is_C_1_triggered [2023-04-01 06:08:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-04-01 06:08:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2023-04-01 06:08:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-04-01 06:08:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-01 06:08:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-04-01 06:08:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-04-01 06:08:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2023-04-01 06:08:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2023-04-01 06:08:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-04-01 06:08:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2023-04-01 06:08:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-01 06:08:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2023-04-01 06:08:46,277 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:08:46,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:08:46,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:08:46,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:08:46,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:08:46,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:08:46,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:08:46,336 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:08:46,338 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:08:46,577 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:08:46,643 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:08:46,643 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-01 06:08:46,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:08:46 BoogieIcfgContainer [2023-04-01 06:08:46,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:08:46,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:08:46,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:08:46,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:08:46,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:08:45" (1/3) ... [2023-04-01 06:08:46,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c9737c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:08:46, skipping insertion in model container [2023-04-01 06:08:46,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:46" (2/3) ... [2023-04-01 06:08:46,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c9737c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:08:46, skipping insertion in model container [2023-04-01 06:08:46,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:08:46" (3/3) ... [2023-04-01 06:08:46,651 INFO L112 eAbstractionObserver]: Analyzing ICFG kundu1.cil.c [2023-04-01 06:08:46,665 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:08:46,665 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:08:46,699 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:08:46,704 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;@5cc0f2e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:08:46,704 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:08:46,707 INFO L276 IsEmpty]: Start isEmpty. Operand has 125 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 78 states have internal predecessors, (97), 30 states have call successors, (30), 21 states have call predecessors, (30), 21 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-04-01 06:08:46,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 06:08:46,714 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:08:46,715 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] [2023-04-01 06:08:46,715 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:08:46,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:08:46,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1126823563, now seen corresponding path program 1 times [2023-04-01 06:08:46,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:08:46,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794641393] [2023-04-01 06:08:46,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:08:46,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:08:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:08:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:08:47,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:08:47,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794641393] [2023-04-01 06:08:47,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794641393] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:08:47,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:08:47,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 06:08:47,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451676138] [2023-04-01 06:08:47,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:08:47,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:08:47,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:08:47,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:08:47,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 06:08:47,162 INFO L87 Difference]: Start difference. First operand has 125 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 78 states have internal predecessors, (97), 30 states have call successors, (30), 21 states have call predecessors, (30), 21 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 06:08:47,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:08:47,404 INFO L93 Difference]: Finished difference Result 331 states and 443 transitions. [2023-04-01 06:08:47,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:08:47,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 59 [2023-04-01 06:08:47,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:08:47,413 INFO L225 Difference]: With dead ends: 331 [2023-04-01 06:08:47,414 INFO L226 Difference]: Without dead ends: 212 [2023-04-01 06:08:47,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 06:08:47,419 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 257 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:08:47,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 379 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:08:47,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-04-01 06:08:47,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 200. [2023-04-01 06:08:47,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 120 states have (on average 1.325) internal successors, (159), 129 states have internal predecessors, (159), 47 states have call successors, (47), 35 states have call predecessors, (47), 32 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) [2023-04-01 06:08:47,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 250 transitions. [2023-04-01 06:08:47,464 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 250 transitions. Word has length 59 [2023-04-01 06:08:47,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:08:47,465 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 250 transitions. [2023-04-01 06:08:47,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 06:08:47,465 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 250 transitions. [2023-04-01 06:08:47,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 06:08:47,467 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:08:47,467 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] [2023-04-01 06:08:47,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:08:47,467 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:08:47,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:08:47,468 INFO L85 PathProgramCache]: Analyzing trace with hash -637993046, now seen corresponding path program 1 times [2023-04-01 06:08:47,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:08:47,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910329126] [2023-04-01 06:08:47,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:08:47,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:08:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:08:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:08:47,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:08:47,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910329126] [2023-04-01 06:08:47,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910329126] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:08:47,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:08:47,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 06:08:47,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819145660] [2023-04-01 06:08:47,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:08:47,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 06:08:47,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:08:47,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 06:08:47,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 06:08:47,721 INFO L87 Difference]: Start difference. First operand 200 states and 250 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 06:08:48,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:08:48,254 INFO L93 Difference]: Finished difference Result 983 states and 1317 transitions. [2023-04-01 06:08:48,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 06:08:48,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 59 [2023-04-01 06:08:48,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:08:48,259 INFO L225 Difference]: With dead ends: 983 [2023-04-01 06:08:48,259 INFO L226 Difference]: Without dead ends: 765 [2023-04-01 06:08:48,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:08:48,262 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 777 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 06:08:48,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 816 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 06:08:48,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2023-04-01 06:08:48,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 641. [2023-04-01 06:08:48,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 398 states have (on average 1.2814070351758795) internal successors, (510), 424 states have internal predecessors, (510), 136 states have call successors, (136), 108 states have call predecessors, (136), 106 states have return successors, (178), 134 states have call predecessors, (178), 131 states have call successors, (178) [2023-04-01 06:08:48,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 824 transitions. [2023-04-01 06:08:48,322 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 824 transitions. Word has length 59 [2023-04-01 06:08:48,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:08:48,322 INFO L495 AbstractCegarLoop]: Abstraction has 641 states and 824 transitions. [2023-04-01 06:08:48,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 06:08:48,323 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 824 transitions. [2023-04-01 06:08:48,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 06:08:48,324 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:08:48,324 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] [2023-04-01 06:08:48,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:08:48,324 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:08:48,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:08:48,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1666287045, now seen corresponding path program 1 times [2023-04-01 06:08:48,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:08:48,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164444823] [2023-04-01 06:08:48,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:08:48,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:08:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:08:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:08:48,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:08:48,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164444823] [2023-04-01 06:08:48,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164444823] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:08:48,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:08:48,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 06:08:48,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959881343] [2023-04-01 06:08:48,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:08:48,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:08:48,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:08:48,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:08:48,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 06:08:48,388 INFO L87 Difference]: Start difference. First operand 641 states and 824 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2023-04-01 06:08:48,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:08:48,585 INFO L93 Difference]: Finished difference Result 1360 states and 1823 transitions. [2023-04-01 06:08:48,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:08:48,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 60 [2023-04-01 06:08:48,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:08:48,589 INFO L225 Difference]: With dead ends: 1360 [2023-04-01 06:08:48,589 INFO L226 Difference]: Without dead ends: 735 [2023-04-01 06:08:48,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 06:08:48,592 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 235 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:08:48,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 489 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:08:48,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2023-04-01 06:08:48,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 687. [2023-04-01 06:08:48,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 420 states have (on average 1.230952380952381) internal successors, (517), 448 states have internal predecessors, (517), 150 states have call successors, (150), 120 states have call predecessors, (150), 116 states have return successors, (189), 144 states have call predecessors, (189), 145 states have call successors, (189) [2023-04-01 06:08:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 856 transitions. [2023-04-01 06:08:48,638 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 856 transitions. Word has length 60 [2023-04-01 06:08:48,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:08:48,638 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 856 transitions. [2023-04-01 06:08:48,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2023-04-01 06:08:48,639 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 856 transitions. [2023-04-01 06:08:48,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 06:08:48,640 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:08:48,640 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] [2023-04-01 06:08:48,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:08:48,640 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:08:48,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:08:48,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1657005564, now seen corresponding path program 1 times [2023-04-01 06:08:48,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:08:48,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672956027] [2023-04-01 06:08:48,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:08:48,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:08:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:08:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:08:48,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:08:48,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672956027] [2023-04-01 06:08:48,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672956027] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:08:48,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:08:48,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:08:48,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652598713] [2023-04-01 06:08:48,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:08:48,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:08:48,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:08:48,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:08:48,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:08:48,712 INFO L87 Difference]: Start difference. First operand 687 states and 856 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-01 06:08:48,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:08:48,804 INFO L93 Difference]: Finished difference Result 1369 states and 1743 transitions. [2023-04-01 06:08:48,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 06:08:48,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2023-04-01 06:08:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:08:48,808 INFO L225 Difference]: With dead ends: 1369 [2023-04-01 06:08:48,808 INFO L226 Difference]: Without dead ends: 774 [2023-04-01 06:08:48,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:08:48,811 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 102 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:08:48,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 473 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:08:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2023-04-01 06:08:48,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 760. [2023-04-01 06:08:48,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 464 states have (on average 1.2241379310344827) internal successors, (568), 495 states have internal predecessors, (568), 166 states have call successors, (166), 133 states have call predecessors, (166), 129 states have return successors, (216), 159 states have call predecessors, (216), 161 states have call successors, (216) [2023-04-01 06:08:48,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 950 transitions. [2023-04-01 06:08:48,856 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 950 transitions. Word has length 60 [2023-04-01 06:08:48,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:08:48,856 INFO L495 AbstractCegarLoop]: Abstraction has 760 states and 950 transitions. [2023-04-01 06:08:48,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-01 06:08:48,857 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 950 transitions. [2023-04-01 06:08:48,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 06:08:48,858 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:08:48,858 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] [2023-04-01 06:08:48,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:08:48,858 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:08:48,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:08:48,859 INFO L85 PathProgramCache]: Analyzing trace with hash -728504440, now seen corresponding path program 1 times [2023-04-01 06:08:48,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:08:48,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694402971] [2023-04-01 06:08:48,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:08:48,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:08:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:08:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:08:49,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:08:49,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694402971] [2023-04-01 06:08:49,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694402971] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:08:49,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:08:49,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 06:08:49,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188154471] [2023-04-01 06:08:49,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:08:49,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 06:08:49,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:08:49,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 06:08:49,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:08:49,021 INFO L87 Difference]: Start difference. First operand 760 states and 950 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2023-04-01 06:08:49,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:08:49,434 INFO L93 Difference]: Finished difference Result 1359 states and 1817 transitions. [2023-04-01 06:08:49,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 06:08:49,435 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 73 [2023-04-01 06:08:49,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:08:49,439 INFO L225 Difference]: With dead ends: 1359 [2023-04-01 06:08:49,439 INFO L226 Difference]: Without dead ends: 1005 [2023-04-01 06:08:49,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-01 06:08:49,442 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 575 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:08:49,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 314 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:08:49,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2023-04-01 06:08:49,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 984. [2023-04-01 06:08:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 612 states have (on average 1.2679738562091503) internal successors, (776), 679 states have internal predecessors, (776), 210 states have call successors, (210), 147 states have call predecessors, (210), 161 states have return successors, (306), 204 states have call predecessors, (306), 205 states have call successors, (306) [2023-04-01 06:08:49,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1292 transitions. [2023-04-01 06:08:49,507 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1292 transitions. Word has length 73 [2023-04-01 06:08:49,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:08:49,507 INFO L495 AbstractCegarLoop]: Abstraction has 984 states and 1292 transitions. [2023-04-01 06:08:49,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2023-04-01 06:08:49,508 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1292 transitions. [2023-04-01 06:08:49,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-01 06:08:49,509 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:08:49,509 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:08:49,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:08:49,509 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:08:49,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:08:49,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1830526949, now seen corresponding path program 1 times [2023-04-01 06:08:49,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:08:49,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752577845] [2023-04-01 06:08:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:08:49,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:08:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:08:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 06:08:49,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:08:49,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752577845] [2023-04-01 06:08:49,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752577845] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:08:49,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:08:49,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 06:08:49,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415324746] [2023-04-01 06:08:49,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:08:49,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 06:08:49,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:08:49,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 06:08:49,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:08:49,636 INFO L87 Difference]: Start difference. First operand 984 states and 1292 transitions. Second operand has 9 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-04-01 06:08:50,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:08:50,272 INFO L93 Difference]: Finished difference Result 3370 states and 5220 transitions. [2023-04-01 06:08:50,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:08:50,273 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 76 [2023-04-01 06:08:50,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:08:50,286 INFO L225 Difference]: With dead ends: 3370 [2023-04-01 06:08:50,287 INFO L226 Difference]: Without dead ends: 2403 [2023-04-01 06:08:50,293 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 [2023-04-01 06:08:50,294 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 351 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 06:08:50,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 358 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 06:08:50,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2403 states. [2023-04-01 06:08:50,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2403 to 2098. [2023-04-01 06:08:50,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 1342 states have (on average 1.2868852459016393) internal successors, (1727), 1492 states have internal predecessors, (1727), 438 states have call successors, (438), 272 states have call predecessors, (438), 317 states have return successors, (860), 433 states have call predecessors, (860), 433 states have call successors, (860) [2023-04-01 06:08:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 3025 transitions. [2023-04-01 06:08:50,440 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 3025 transitions. Word has length 76 [2023-04-01 06:08:50,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:08:50,440 INFO L495 AbstractCegarLoop]: Abstraction has 2098 states and 3025 transitions. [2023-04-01 06:08:50,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-04-01 06:08:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 3025 transitions. [2023-04-01 06:08:50,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 06:08:50,441 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:08:50,442 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] [2023-04-01 06:08:50,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:08:50,442 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:08:50,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:08:50,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1215255525, now seen corresponding path program 1 times [2023-04-01 06:08:50,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:08:50,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504734840] [2023-04-01 06:08:50,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:08:50,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:08:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:08:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:08:50,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:08:50,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504734840] [2023-04-01 06:08:50,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504734840] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:08:50,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:08:50,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 06:08:50,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119799439] [2023-04-01 06:08:50,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:08:50,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 06:08:50,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:08:50,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 06:08:50,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 06:08:50,599 INFO L87 Difference]: Start difference. First operand 2098 states and 3025 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (18), 6 states have call predecessors, (18), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2023-04-01 06:08:51,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:08:51,202 INFO L93 Difference]: Finished difference Result 4407 states and 7085 transitions. [2023-04-01 06:08:51,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 06:08:51,203 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (18), 6 states have call predecessors, (18), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 77 [2023-04-01 06:08:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:08:51,220 INFO L225 Difference]: With dead ends: 4407 [2023-04-01 06:08:51,220 INFO L226 Difference]: Without dead ends: 3247 [2023-04-01 06:08:51,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-04-01 06:08:51,231 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 344 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:08:51,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 783 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:08:51,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2023-04-01 06:08:51,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 3104. [2023-04-01 06:08:51,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 2007 states have (on average 1.3014449427005481) internal successors, (2612), 2245 states have internal predecessors, (2612), 640 states have call successors, (640), 377 states have call predecessors, (640), 456 states have return successors, (1515), 637 states have call predecessors, (1515), 635 states have call successors, (1515) [2023-04-01 06:08:51,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 4767 transitions. [2023-04-01 06:08:51,499 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 4767 transitions. Word has length 77 [2023-04-01 06:08:51,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:08:51,500 INFO L495 AbstractCegarLoop]: Abstraction has 3104 states and 4767 transitions. [2023-04-01 06:08:51,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (18), 6 states have call predecessors, (18), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2023-04-01 06:08:51,500 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 4767 transitions. [2023-04-01 06:08:51,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-01 06:08:51,501 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:08:51,501 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] [2023-04-01 06:08:51,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:08:51,501 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:08:51,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:08:51,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1926800563, now seen corresponding path program 1 times [2023-04-01 06:08:51,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:08:51,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938969478] [2023-04-01 06:08:51,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:08:51,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:08:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:08:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 06:08:51,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:08:51,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938969478] [2023-04-01 06:08:51,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938969478] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:08:51,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:08:51,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 06:08:51,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313070711] [2023-04-01 06:08:51,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:08:51,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 06:08:51,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:08:51,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 06:08:51,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:08:51,617 INFO L87 Difference]: Start difference. First operand 3104 states and 4767 transitions. Second operand has 9 states, 7 states have (on average 6.714285714285714) internal successors, (47), 8 states have internal predecessors, (47), 5 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-01 06:08:52,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:08:52,642 INFO L93 Difference]: Finished difference Result 10428 states and 22018 transitions. [2023-04-01 06:08:52,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:08:52,642 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.714285714285714) internal successors, (47), 8 states have internal predecessors, (47), 5 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2023-04-01 06:08:52,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:08:52,693 INFO L225 Difference]: With dead ends: 10428 [2023-04-01 06:08:52,694 INFO L226 Difference]: Without dead ends: 7341 [2023-04-01 06:08:52,732 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 [2023-04-01 06:08:52,734 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 340 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:08:52,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 388 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:08:52,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7341 states. [2023-04-01 06:08:53,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7341 to 6496. [2023-04-01 06:08:53,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6496 states, 4288 states have (on average 1.2856809701492538) internal successors, (5513), 4750 states have internal predecessors, (5513), 1282 states have call successors, (1282), 708 states have call predecessors, (1282), 925 states have return successors, (4837), 1285 states have call predecessors, (4837), 1277 states have call successors, (4837) [2023-04-01 06:08:53,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6496 states to 6496 states and 11632 transitions. [2023-04-01 06:08:53,437 INFO L78 Accepts]: Start accepts. Automaton has 6496 states and 11632 transitions. Word has length 80 [2023-04-01 06:08:53,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:08:53,437 INFO L495 AbstractCegarLoop]: Abstraction has 6496 states and 11632 transitions. [2023-04-01 06:08:53,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.714285714285714) internal successors, (47), 8 states have internal predecessors, (47), 5 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-01 06:08:53,437 INFO L276 IsEmpty]: Start isEmpty. Operand 6496 states and 11632 transitions. [2023-04-01 06:08:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 06:08:53,441 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:08:53,441 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:08:53,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:08:53,442 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:08:53,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:08:53,442 INFO L85 PathProgramCache]: Analyzing trace with hash -379741183, now seen corresponding path program 1 times [2023-04-01 06:08:53,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:08:53,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252947115] [2023-04-01 06:08:53,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:08:53,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:08:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:08:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 06:08:53,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:08:53,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252947115] [2023-04-01 06:08:53,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252947115] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:08:53,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:08:53,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 06:08:53,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034962219] [2023-04-01 06:08:53,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:08:53,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 06:08:53,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:08:53,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 06:08:53,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 06:08:53,512 INFO L87 Difference]: Start difference. First operand 6496 states and 11632 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2023-04-01 06:08:54,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:08:54,421 INFO L93 Difference]: Finished difference Result 14230 states and 25376 transitions. [2023-04-01 06:08:54,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 06:08:54,422 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 78 [2023-04-01 06:08:54,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:08:54,478 INFO L225 Difference]: With dead ends: 14230 [2023-04-01 06:08:54,478 INFO L226 Difference]: Without dead ends: 7751 [2023-04-01 06:08:54,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-04-01 06:08:54,536 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 640 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:08:54,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 569 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:08:54,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7751 states. [2023-04-01 06:08:55,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7751 to 5911. [2023-04-01 06:08:55,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5911 states, 3785 states have (on average 1.2227212681638044) internal successors, (4628), 4147 states have internal predecessors, (4628), 1141 states have call successors, (1141), 798 states have call predecessors, (1141), 984 states have return successors, (2542), 1167 states have call predecessors, (2542), 1136 states have call successors, (2542) [2023-04-01 06:08:55,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5911 states to 5911 states and 8311 transitions. [2023-04-01 06:08:55,182 INFO L78 Accepts]: Start accepts. Automaton has 5911 states and 8311 transitions. Word has length 78 [2023-04-01 06:08:55,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:08:55,184 INFO L495 AbstractCegarLoop]: Abstraction has 5911 states and 8311 transitions. [2023-04-01 06:08:55,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2023-04-01 06:08:55,185 INFO L276 IsEmpty]: Start isEmpty. Operand 5911 states and 8311 transitions. [2023-04-01 06:08:55,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-01 06:08:55,186 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:08:55,186 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] [2023-04-01 06:08:55,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 06:08:55,187 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:08:55,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:08:55,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2122628912, now seen corresponding path program 1 times [2023-04-01 06:08:55,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:08:55,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637282155] [2023-04-01 06:08:55,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:08:55,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:08:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:08:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 06:08:55,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:08:55,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637282155] [2023-04-01 06:08:55,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637282155] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:08:55,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:08:55,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 06:08:55,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436612826] [2023-04-01 06:08:55,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:08:55,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 06:08:55,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:08:55,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 06:08:55,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 06:08:55,252 INFO L87 Difference]: Start difference. First operand 5911 states and 8311 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 4 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-04-01 06:08:55,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:08:56,000 INFO L93 Difference]: Finished difference Result 12873 states and 18258 transitions. [2023-04-01 06:08:56,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 06:08:56,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 4 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 81 [2023-04-01 06:08:56,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:08:56,027 INFO L225 Difference]: With dead ends: 12873 [2023-04-01 06:08:56,027 INFO L226 Difference]: Without dead ends: 6979 [2023-04-01 06:08:56,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-04-01 06:08:56,046 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 598 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:08:56,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 534 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:08:56,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6979 states. [2023-04-01 06:08:56,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6979 to 5846. [2023-04-01 06:08:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5846 states, 3722 states have (on average 1.1829661472326707) internal successors, (4403), 4035 states have internal predecessors, (4403), 1093 states have call successors, (1093), 866 states have call predecessors, (1093), 1030 states have return successors, (1886), 1126 states have call predecessors, (1886), 1088 states have call successors, (1886) [2023-04-01 06:08:56,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5846 states to 5846 states and 7382 transitions. [2023-04-01 06:08:56,548 INFO L78 Accepts]: Start accepts. Automaton has 5846 states and 7382 transitions. Word has length 81 [2023-04-01 06:08:56,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:08:56,548 INFO L495 AbstractCegarLoop]: Abstraction has 5846 states and 7382 transitions. [2023-04-01 06:08:56,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 4 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-04-01 06:08:56,549 INFO L276 IsEmpty]: Start isEmpty. Operand 5846 states and 7382 transitions. [2023-04-01 06:08:56,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-01 06:08:56,552 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:08:56,552 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:08:56,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 06:08:56,552 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:08:56,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:08:56,553 INFO L85 PathProgramCache]: Analyzing trace with hash -655179802, now seen corresponding path program 1 times [2023-04-01 06:08:56,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:08:56,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448834457] [2023-04-01 06:08:56,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:08:56,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:08:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:08:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 06:08:56,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:08:56,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448834457] [2023-04-01 06:08:56,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448834457] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:08:56,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329096977] [2023-04-01 06:08:56,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:08:56,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:08:56,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:08:56,890 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) [2023-04-01 06:08:56,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 06:08:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:08:57,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 06:08:57,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:08:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 06:08:57,175 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:08:57,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329096977] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:08:57,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:08:57,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [18] total 19 [2023-04-01 06:08:57,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198773345] [2023-04-01 06:08:57,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:08:57,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:08:57,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:08:57,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:08:57,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-04-01 06:08:57,177 INFO L87 Difference]: Start difference. First operand 5846 states and 7382 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 3 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (21), 2 states have call predecessors, (21), 3 states have call successors, (21) [2023-04-01 06:08:57,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:08:57,626 INFO L93 Difference]: Finished difference Result 10465 states and 13265 transitions. [2023-04-01 06:08:57,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:08:57,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 3 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (21), 2 states have call predecessors, (21), 3 states have call successors, (21) Word has length 131 [2023-04-01 06:08:57,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:08:57,652 INFO L225 Difference]: With dead ends: 10465 [2023-04-01 06:08:57,652 INFO L226 Difference]: Without dead ends: 5846 [2023-04-01 06:08:57,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-04-01 06:08:57,665 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 71 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:08:57,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 125 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:08:57,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5846 states. [2023-04-01 06:08:58,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5846 to 5846. [2023-04-01 06:08:58,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5846 states, 3722 states have (on average 1.1786673831273509) internal successors, (4387), 4035 states have internal predecessors, (4387), 1093 states have call successors, (1093), 866 states have call predecessors, (1093), 1030 states have return successors, (1886), 1126 states have call predecessors, (1886), 1088 states have call successors, (1886) [2023-04-01 06:08:58,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5846 states to 5846 states and 7366 transitions. [2023-04-01 06:08:58,254 INFO L78 Accepts]: Start accepts. Automaton has 5846 states and 7366 transitions. Word has length 131 [2023-04-01 06:08:58,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:08:58,255 INFO L495 AbstractCegarLoop]: Abstraction has 5846 states and 7366 transitions. [2023-04-01 06:08:58,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 3 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (21), 2 states have call predecessors, (21), 3 states have call successors, (21) [2023-04-01 06:08:58,255 INFO L276 IsEmpty]: Start isEmpty. Operand 5846 states and 7366 transitions. [2023-04-01 06:08:58,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-04-01 06:08:58,259 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:08:58,259 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:08:58,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 06:08:58,465 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,SelfDestructingSolverStorable10 [2023-04-01 06:08:58,465 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:08:58,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:08:58,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1078775626, now seen corresponding path program 1 times [2023-04-01 06:08:58,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:08:58,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724595364] [2023-04-01 06:08:58,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:08:58,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:08:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:08:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 06:08:58,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:08:58,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724595364] [2023-04-01 06:08:58,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724595364] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:08:58,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843142372] [2023-04-01 06:08:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:08:58,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:08:58,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:08:58,589 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) [2023-04-01 06:08:58,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 06:08:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:08:58,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 06:08:58,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:08:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 06:08:58,863 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:08:58,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843142372] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:08:58,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:08:58,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 06:08:58,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400309713] [2023-04-01 06:08:58,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:08:58,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:08:58,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:08:58,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:08:58,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 06:08:58,865 INFO L87 Difference]: Start difference. First operand 5846 states and 7366 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (23), 2 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-01 06:08:59,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:08:59,872 INFO L93 Difference]: Finished difference Result 15976 states and 20303 transitions. [2023-04-01 06:08:59,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:08:59,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (23), 2 states have call predecessors, (23), 3 states have call successors, (23) Word has length 135 [2023-04-01 06:08:59,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:08:59,917 INFO L225 Difference]: With dead ends: 15976 [2023-04-01 06:08:59,917 INFO L226 Difference]: Without dead ends: 11395 [2023-04-01 06:08:59,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 06:08:59,935 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 59 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:08:59,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 247 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:08:59,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11395 states. [2023-04-01 06:09:00,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11395 to 11278. [2023-04-01 06:09:00,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11278 states, 7326 states have (on average 1.1755391755391755) internal successors, (8612), 7893 states have internal predecessors, (8612), 2006 states have call successors, (2006), 1614 states have call predecessors, (2006), 1945 states have return successors, (3597), 2077 states have call predecessors, (3597), 2001 states have call successors, (3597) [2023-04-01 06:09:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11278 states to 11278 states and 14215 transitions. [2023-04-01 06:09:00,882 INFO L78 Accepts]: Start accepts. Automaton has 11278 states and 14215 transitions. Word has length 135 [2023-04-01 06:09:00,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:09:00,882 INFO L495 AbstractCegarLoop]: Abstraction has 11278 states and 14215 transitions. [2023-04-01 06:09:00,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (23), 2 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-01 06:09:00,882 INFO L276 IsEmpty]: Start isEmpty. Operand 11278 states and 14215 transitions. [2023-04-01 06:09:00,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-04-01 06:09:00,886 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:09:00,886 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:09:00,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 06:09:01,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 06:09:01,095 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:09:01,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:09:01,096 INFO L85 PathProgramCache]: Analyzing trace with hash -356828758, now seen corresponding path program 1 times [2023-04-01 06:09:01,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:09:01,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529690248] [2023-04-01 06:09:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:01,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:09:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 06:09:01,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:09:01,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529690248] [2023-04-01 06:09:01,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529690248] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:09:01,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892510915] [2023-04-01 06:09:01,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:01,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:09:01,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:09:01,419 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:09:01,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 06:09:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:01,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 06:09:01,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:09:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 06:09:01,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:09:01,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892510915] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:09:01,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:09:01,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [18] total 21 [2023-04-01 06:09:01,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606966505] [2023-04-01 06:09:01,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:09:01,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 06:09:01,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:09:01,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 06:09:01,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2023-04-01 06:09:01,584 INFO L87 Difference]: Start difference. First operand 11278 states and 14215 transitions. Second operand has 6 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-01 06:09:02,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:09:02,362 INFO L93 Difference]: Finished difference Result 20612 states and 26201 transitions. [2023-04-01 06:09:02,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 06:09:02,363 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 133 [2023-04-01 06:09:02,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:09:02,397 INFO L225 Difference]: With dead ends: 20612 [2023-04-01 06:09:02,397 INFO L226 Difference]: Without dead ends: 9351 [2023-04-01 06:09:02,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2023-04-01 06:09:02,423 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 51 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:09:02,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 712 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:09:02,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9351 states. [2023-04-01 06:09:02,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9351 to 7979. [2023-04-01 06:09:02,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7979 states, 5371 states have (on average 1.1936324706758519) internal successors, (6411), 5765 states have internal predecessors, (6411), 1337 states have call successors, (1337), 1085 states have call predecessors, (1337), 1270 states have return successors, (1986), 1402 states have call predecessors, (1986), 1332 states have call successors, (1986) [2023-04-01 06:09:03,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7979 states to 7979 states and 9734 transitions. [2023-04-01 06:09:03,013 INFO L78 Accepts]: Start accepts. Automaton has 7979 states and 9734 transitions. Word has length 133 [2023-04-01 06:09:03,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:09:03,014 INFO L495 AbstractCegarLoop]: Abstraction has 7979 states and 9734 transitions. [2023-04-01 06:09:03,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-01 06:09:03,014 INFO L276 IsEmpty]: Start isEmpty. Operand 7979 states and 9734 transitions. [2023-04-01 06:09:03,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-01 06:09:03,017 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:09:03,018 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:09:03,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 06:09:03,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:09:03,240 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:09:03,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:09:03,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1924814291, now seen corresponding path program 1 times [2023-04-01 06:09:03,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:09:03,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104622105] [2023-04-01 06:09:03,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:03,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:09:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 06:09:03,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:09:03,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104622105] [2023-04-01 06:09:03,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104622105] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:09:03,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108677969] [2023-04-01 06:09:03,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:03,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:09:03,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:09:03,759 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:09:03,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 06:09:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:03,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 06:09:03,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:09:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 06:09:04,003 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:09:04,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108677969] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:09:04,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:09:04,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [22] total 27 [2023-04-01 06:09:04,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715475994] [2023-04-01 06:09:04,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:09:04,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 06:09:04,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:09:04,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 06:09:04,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2023-04-01 06:09:04,005 INFO L87 Difference]: Start difference. First operand 7979 states and 9734 transitions. Second operand has 7 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-01 06:09:04,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:09:04,859 INFO L93 Difference]: Finished difference Result 16952 states and 20816 transitions. [2023-04-01 06:09:04,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 06:09:04,859 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 136 [2023-04-01 06:09:04,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:09:04,892 INFO L225 Difference]: With dead ends: 16952 [2023-04-01 06:09:04,892 INFO L226 Difference]: Without dead ends: 9099 [2023-04-01 06:09:04,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2023-04-01 06:09:04,910 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 71 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:09:04,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 686 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:09:04,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9099 states. [2023-04-01 06:09:05,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9099 to 7951. [2023-04-01 06:09:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7951 states, 5357 states have (on average 1.1866716445771888) internal successors, (6357), 5737 states have internal predecessors, (6357), 1337 states have call successors, (1337), 1085 states have call predecessors, (1337), 1256 states have return successors, (1922), 1402 states have call predecessors, (1922), 1332 states have call successors, (1922) [2023-04-01 06:09:05,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7951 states to 7951 states and 9616 transitions. [2023-04-01 06:09:05,614 INFO L78 Accepts]: Start accepts. Automaton has 7951 states and 9616 transitions. Word has length 136 [2023-04-01 06:09:05,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:09:05,627 INFO L495 AbstractCegarLoop]: Abstraction has 7951 states and 9616 transitions. [2023-04-01 06:09:05,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-01 06:09:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand 7951 states and 9616 transitions. [2023-04-01 06:09:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-01 06:09:05,629 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:09:05,630 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:09:05,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 06:09:05,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:09:05,838 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:09:05,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:09:05,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1683175820, now seen corresponding path program 1 times [2023-04-01 06:09:05,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:09:05,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686685735] [2023-04-01 06:09:05,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:05,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:09:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-04-01 06:09:05,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:09:05,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686685735] [2023-04-01 06:09:05,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686685735] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:09:05,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158083189] [2023-04-01 06:09:05,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:05,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:09:05,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:09:05,991 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:09:05,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 06:09:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:06,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 06:09:06,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:09:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 52 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 06:09:06,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 06:09:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-04-01 06:09:06,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158083189] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 06:09:06,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 06:09:06,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 16 [2023-04-01 06:09:06,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267330749] [2023-04-01 06:09:06,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:09:06,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 06:09:06,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:09:06,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 06:09:06,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-04-01 06:09:06,448 INFO L87 Difference]: Start difference. First operand 7951 states and 9616 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 5 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-04-01 06:09:07,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:09:07,327 INFO L93 Difference]: Finished difference Result 15745 states and 19315 transitions. [2023-04-01 06:09:07,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 06:09:07,328 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 5 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 137 [2023-04-01 06:09:07,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:09:07,349 INFO L225 Difference]: With dead ends: 15745 [2023-04-01 06:09:07,350 INFO L226 Difference]: Without dead ends: 5384 [2023-04-01 06:09:07,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:09:07,370 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 413 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:09:07,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 329 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:09:07,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5384 states. [2023-04-01 06:09:07,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5384 to 4375. [2023-04-01 06:09:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4375 states, 2913 states have (on average 1.1599725369035359) internal successors, (3379), 3060 states have internal predecessors, (3379), 758 states have call successors, (758), 656 states have call predecessors, (758), 703 states have return successors, (923), 739 states have call predecessors, (923), 751 states have call successors, (923) [2023-04-01 06:09:07,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4375 states to 4375 states and 5060 transitions. [2023-04-01 06:09:07,722 INFO L78 Accepts]: Start accepts. Automaton has 4375 states and 5060 transitions. Word has length 137 [2023-04-01 06:09:07,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:09:07,723 INFO L495 AbstractCegarLoop]: Abstraction has 4375 states and 5060 transitions. [2023-04-01 06:09:07,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 5 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-04-01 06:09:07,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4375 states and 5060 transitions. [2023-04-01 06:09:07,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-01 06:09:07,725 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:09:07,726 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:09:07,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 06:09:07,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 06:09:07,935 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:09:07,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:09:07,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1506203733, now seen corresponding path program 1 times [2023-04-01 06:09:07,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:09:07,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689662730] [2023-04-01 06:09:07,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:07,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:09:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 28 proven. 15 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-04-01 06:09:08,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:09:08,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689662730] [2023-04-01 06:09:08,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689662730] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:09:08,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693878114] [2023-04-01 06:09:08,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:08,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:09:08,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:09:08,154 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:09:08,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 06:09:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:08,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 06:09:08,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:09:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 72 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 06:09:08,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 06:09:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 32 proven. 6 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-04-01 06:09:08,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693878114] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 06:09:08,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2099512872] [2023-04-01 06:09:08,860 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-04-01 06:09:08,860 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 06:09:08,869 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 06:09:08,872 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 06:09:08,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 06:09:09,068 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 55 for LOIs [2023-04-01 06:09:09,091 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 69 for LOIs [2023-04-01 06:09:09,300 INFO L197 IcfgInterpreter]: Interpreting procedure init_model with input of size 46 for LOIs [2023-04-01 06:09:09,305 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 64 for LOIs [2023-04-01 06:09:12,485 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 44 for LOIs [2023-04-01 06:09:12,490 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 44 for LOIs [2023-04-01 06:09:12,495 INFO L197 IcfgInterpreter]: Interpreting procedure stop_simulation with input of size 34 for LOIs [2023-04-01 06:09:12,586 INFO L197 IcfgInterpreter]: Interpreting procedure eval with input of size 61 for LOIs [2023-04-01 06:09:14,400 INFO L197 IcfgInterpreter]: Interpreting procedure C_1 with input of size 50 for LOIs [2023-04-01 06:09:14,443 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 40 for LOIs [2023-04-01 06:09:14,446 INFO L197 IcfgInterpreter]: Interpreting procedure init_threads with input of size 46 for LOIs [2023-04-01 06:09:14,452 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 40 for LOIs [2023-04-01 06:09:14,457 INFO L197 IcfgInterpreter]: Interpreting procedure P_1 with input of size 60 for LOIs [2023-04-01 06:09:14,474 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 24 for LOIs [2023-04-01 06:09:14,479 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 50 for LOIs [2023-04-01 06:09:14,692 INFO L197 IcfgInterpreter]: Interpreting procedure is_C_1_triggered with input of size 24 for LOIs [2023-04-01 06:09:14,732 INFO L197 IcfgInterpreter]: Interpreting procedure is_P_1_triggered with input of size 44 for LOIs [2023-04-01 06:09:14,759 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 06:09:19,077 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '290423#(and (<= 1 |#StackHeapBarrier|) (= ~C_1_pc~0 1) (= ~e~0 0) (= ~P_1_ev~0 0) (= ~C_1_pr~0 0) (= ~max_loop~0 2) (= ~P_1_i~0 1) (< ~num~0 0) (= |#NULL.offset| 0) (= ~C_1_ev~0 0) (= ~C_1_st~0 1) (= ~C_1_i~0 1) (= |#NULL.base| 0))' at error location [2023-04-01 06:09:19,077 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 06:09:19,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 06:09:19,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 21 [2023-04-01 06:09:19,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902915579] [2023-04-01 06:09:19,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 06:09:19,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 06:09:19,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:09:19,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 06:09:19,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=5618, Unknown=0, NotChecked=0, Total=6162 [2023-04-01 06:09:19,081 INFO L87 Difference]: Start difference. First operand 4375 states and 5060 transitions. Second operand has 21 states, 20 states have (on average 9.35) internal successors, (187), 20 states have internal predecessors, (187), 14 states have call successors, (75), 11 states have call predecessors, (75), 14 states have return successors, (68), 16 states have call predecessors, (68), 14 states have call successors, (68) [2023-04-01 06:09:21,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:09:21,481 INFO L93 Difference]: Finished difference Result 8932 states and 10877 transitions. [2023-04-01 06:09:21,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-04-01 06:09:21,482 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 9.35) internal successors, (187), 20 states have internal predecessors, (187), 14 states have call successors, (75), 11 states have call predecessors, (75), 14 states have return successors, (68), 16 states have call predecessors, (68), 14 states have call successors, (68) Word has length 146 [2023-04-01 06:09:21,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:09:21,500 INFO L225 Difference]: With dead ends: 8932 [2023-04-01 06:09:21,500 INFO L226 Difference]: Without dead ends: 4588 [2023-04-01 06:09:21,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 381 SyntacticMatches, 10 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6347 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1320, Invalid=12722, Unknown=0, NotChecked=0, Total=14042 [2023-04-01 06:09:21,517 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 820 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 3129 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 3781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 3129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:09:21,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 1384 Invalid, 3781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 3129 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 06:09:21,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4588 states. [2023-04-01 06:09:22,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4588 to 3684. [2023-04-01 06:09:22,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3684 states, 2393 states have (on average 1.1487672377768492) internal successors, (2749), 2514 states have internal predecessors, (2749), 666 states have call successors, (666), 567 states have call predecessors, (666), 624 states have return successors, (836), 662 states have call predecessors, (836), 662 states have call successors, (836) [2023-04-01 06:09:22,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3684 states to 3684 states and 4251 transitions. [2023-04-01 06:09:22,351 INFO L78 Accepts]: Start accepts. Automaton has 3684 states and 4251 transitions. Word has length 146 [2023-04-01 06:09:22,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:09:22,351 INFO L495 AbstractCegarLoop]: Abstraction has 3684 states and 4251 transitions. [2023-04-01 06:09:22,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 9.35) internal successors, (187), 20 states have internal predecessors, (187), 14 states have call successors, (75), 11 states have call predecessors, (75), 14 states have return successors, (68), 16 states have call predecessors, (68), 14 states have call successors, (68) [2023-04-01 06:09:22,352 INFO L276 IsEmpty]: Start isEmpty. Operand 3684 states and 4251 transitions. [2023-04-01 06:09:22,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-04-01 06:09:22,353 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:09:22,354 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:09:22,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 06:09:22,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-01 06:09:22,572 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:09:22,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:09:22,573 INFO L85 PathProgramCache]: Analyzing trace with hash -980640642, now seen corresponding path program 1 times [2023-04-01 06:09:22,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:09:22,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523493055] [2023-04-01 06:09:22,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:22,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:09:22,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 06:09:22,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:09:22,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523493055] [2023-04-01 06:09:22,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523493055] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:09:22,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678084961] [2023-04-01 06:09:22,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:22,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:09:22,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:09:22,675 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:09:22,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 06:09:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:22,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 06:09:22,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:09:22,888 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 06:09:22,889 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:09:22,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678084961] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:09:22,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:09:22,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 06:09:22,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286701740] [2023-04-01 06:09:22,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:09:22,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:09:22,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:09:22,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:09:22,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 06:09:22,892 INFO L87 Difference]: Start difference. First operand 3684 states and 4251 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 3 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (24), 2 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-01 06:09:23,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:09:23,121 INFO L93 Difference]: Finished difference Result 5880 states and 6791 transitions. [2023-04-01 06:09:23,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:09:23,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 3 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (24), 2 states have call predecessors, (24), 3 states have call successors, (24) Word has length 151 [2023-04-01 06:09:23,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:09:23,133 INFO L225 Difference]: With dead ends: 5880 [2023-04-01 06:09:23,133 INFO L226 Difference]: Without dead ends: 2402 [2023-04-01 06:09:23,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 06:09:23,139 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 30 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:09:23,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 233 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:09:23,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2023-04-01 06:09:23,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 2389. [2023-04-01 06:09:23,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 1530 states have (on average 1.1450980392156862) internal successors, (1752), 1612 states have internal predecessors, (1752), 449 states have call successors, (449), 378 states have call predecessors, (449), 409 states have return successors, (543), 445 states have call predecessors, (543), 445 states have call successors, (543) [2023-04-01 06:09:23,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 2744 transitions. [2023-04-01 06:09:23,358 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 2744 transitions. Word has length 151 [2023-04-01 06:09:23,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:09:23,359 INFO L495 AbstractCegarLoop]: Abstraction has 2389 states and 2744 transitions. [2023-04-01 06:09:23,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 3 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (24), 2 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-01 06:09:23,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 2744 transitions. [2023-04-01 06:09:23,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 06:09:23,360 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:09:23,361 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:09:23,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 06:09:23,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:09:23,579 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:09:23,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:09:23,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1282954652, now seen corresponding path program 1 times [2023-04-01 06:09:23,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:09:23,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248680605] [2023-04-01 06:09:23,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:23,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:09:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 06:09:23,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:09:23,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248680605] [2023-04-01 06:09:23,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248680605] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:09:23,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30942346] [2023-04-01 06:09:23,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:23,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:09:23,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:09:23,760 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:09:23,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 06:09:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:23,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 06:09:23,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:09:24,156 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 45 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 06:09:24,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 06:09:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-04-01 06:09:24,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30942346] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 06:09:24,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 06:09:24,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [10, 12] total 31 [2023-04-01 06:09:24,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161045694] [2023-04-01 06:09:24,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:09:24,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 06:09:24,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:09:24,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 06:09:24,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2023-04-01 06:09:24,650 INFO L87 Difference]: Start difference. First operand 2389 states and 2744 transitions. Second operand has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 12 states have internal predecessors, (77), 8 states have call successors, (30), 7 states have call predecessors, (30), 4 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2023-04-01 06:09:25,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:09:25,432 INFO L93 Difference]: Finished difference Result 2903 states and 3387 transitions. [2023-04-01 06:09:25,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 06:09:25,432 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 12 states have internal predecessors, (77), 8 states have call successors, (30), 7 states have call predecessors, (30), 4 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 152 [2023-04-01 06:09:25,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:09:25,440 INFO L225 Difference]: With dead ends: 2903 [2023-04-01 06:09:25,440 INFO L226 Difference]: Without dead ends: 2900 [2023-04-01 06:09:25,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 06:09:25,442 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 511 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:09:25,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 531 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:09:25,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2023-04-01 06:09:25,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 2776. [2023-04-01 06:09:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2776 states, 1776 states have (on average 1.1469594594594594) internal successors, (2037), 1873 states have internal predecessors, (2037), 524 states have call successors, (524), 436 states have call predecessors, (524), 475 states have return successors, (639), 521 states have call predecessors, (639), 520 states have call successors, (639) [2023-04-01 06:09:25,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 3200 transitions. [2023-04-01 06:09:25,722 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 3200 transitions. Word has length 152 [2023-04-01 06:09:25,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:09:25,722 INFO L495 AbstractCegarLoop]: Abstraction has 2776 states and 3200 transitions. [2023-04-01 06:09:25,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 12 states have internal predecessors, (77), 8 states have call successors, (30), 7 states have call predecessors, (30), 4 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2023-04-01 06:09:25,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 3200 transitions. [2023-04-01 06:09:25,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-04-01 06:09:25,724 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:09:25,724 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:09:25,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 06:09:25,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-01 06:09:25,929 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:09:25,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:09:25,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1637527909, now seen corresponding path program 1 times [2023-04-01 06:09:25,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:09:25,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710838983] [2023-04-01 06:09:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:25,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:09:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-04-01 06:09:26,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:09:26,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710838983] [2023-04-01 06:09:26,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710838983] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:09:26,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325155946] [2023-04-01 06:09:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:26,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:09:26,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:09:26,138 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:09:26,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 06:09:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:26,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 06:09:26,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:09:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 55 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 06:09:26,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 06:09:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-04-01 06:09:26,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325155946] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 06:09:26,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1013959132] [2023-04-01 06:09:26,721 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2023-04-01 06:09:26,721 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 06:09:26,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 06:09:26,722 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 06:09:26,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 06:09:26,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 55 for LOIs [2023-04-01 06:09:26,820 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 69 for LOIs [2023-04-01 06:09:26,926 INFO L197 IcfgInterpreter]: Interpreting procedure init_model with input of size 46 for LOIs [2023-04-01 06:09:26,930 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 64 for LOIs [2023-04-01 06:09:29,868 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 44 for LOIs [2023-04-01 06:09:29,873 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 44 for LOIs [2023-04-01 06:09:29,878 INFO L197 IcfgInterpreter]: Interpreting procedure stop_simulation with input of size 34 for LOIs [2023-04-01 06:09:29,949 INFO L197 IcfgInterpreter]: Interpreting procedure eval with input of size 61 for LOIs [2023-04-01 06:09:32,987 INFO L197 IcfgInterpreter]: Interpreting procedure C_1 with input of size 64 for LOIs [2023-04-01 06:09:33,032 INFO L197 IcfgInterpreter]: Interpreting procedure init_threads with input of size 46 for LOIs [2023-04-01 06:09:33,051 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 40 for LOIs [2023-04-01 06:09:33,055 INFO L197 IcfgInterpreter]: Interpreting procedure P_1 with input of size 60 for LOIs [2023-04-01 06:09:33,113 INFO L197 IcfgInterpreter]: Interpreting procedure write_data with input of size 60 for LOIs [2023-04-01 06:09:33,147 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 53 for LOIs [2023-04-01 06:09:33,151 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 24 for LOIs [2023-04-01 06:09:33,155 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 50 for LOIs [2023-04-01 06:09:33,319 INFO L197 IcfgInterpreter]: Interpreting procedure is_C_1_triggered with input of size 24 for LOIs [2023-04-01 06:09:33,358 INFO L197 IcfgInterpreter]: Interpreting procedure is_P_1_triggered with input of size 44 for LOIs [2023-04-01 06:09:33,405 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 06:09:38,094 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '331991#(and (= ~e~0 0) (= ~P_1_ev~0 0) (= ~P_1_st~0 1) (= ~C_1_pr~0 0) (= ~max_loop~0 2) (= ~P_1_i~0 1) (= |#NULL.offset| 0) (not (= ~num~0 0)) (exists ((v_eval_~tmp___2~0_BEFORE_CALL_45 Int)) (and (<= 0 v_eval_~tmp___2~0_BEFORE_CALL_45) (<= 1 (+ v_eval_~tmp___2~0_BEFORE_CALL_45 |#StackHeapBarrier|)) (<= v_eval_~tmp___2~0_BEFORE_CALL_45 |#StackHeapBarrier|) (<= v_eval_~tmp___2~0_BEFORE_CALL_45 1) (not (= v_eval_~tmp___2~0_BEFORE_CALL_45 0)))) (= ~C_1_ev~0 0) (not (= ~num~0 1)) (= ~C_1_i~0 1) (= |#NULL.base| 0) (< ~i~0 2))' at error location [2023-04-01 06:09:38,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 06:09:38,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 06:09:38,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 22 [2023-04-01 06:09:38,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950327190] [2023-04-01 06:09:38,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 06:09:38,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 06:09:38,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:09:38,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 06:09:38,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=6482, Unknown=0, NotChecked=0, Total=6972 [2023-04-01 06:09:38,098 INFO L87 Difference]: Start difference. First operand 2776 states and 3200 transitions. Second operand has 22 states, 21 states have (on average 8.0) internal successors, (168), 19 states have internal predecessors, (168), 12 states have call successors, (66), 12 states have call predecessors, (66), 11 states have return successors, (58), 13 states have call predecessors, (58), 11 states have call successors, (58)