/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 EqDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:38:15,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:38:15,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:38:15,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:38:15,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:38:15,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:38:15,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:38:15,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:38:15,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:38:15,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:38:15,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:38:15,375 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:38:15,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:38:15,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:38:15,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:38:15,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:38:15,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:38:15,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:38:15,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:38:15,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:38:15,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:38:15,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:38:15,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:38:15,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:38:15,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:38:15,394 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:38:15,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:38:15,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:38:15,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:38:15,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:38:15,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:38:15,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:38:15,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:38:15,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:38:15,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:38:15,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:38:15,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:38:15,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:38:15,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:38:15,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:38:15,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:38:15,404 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 12:38:15,435 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:38:15,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:38:15,435 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:38:15,435 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:38:15,436 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:38:15,436 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:38:15,436 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:38:15,437 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:38:15,437 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:38:15,437 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:38:15,438 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:38:15,438 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:38:15,438 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:38:15,438 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:38:15,438 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:38:15,438 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:38:15,438 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:38:15,438 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:38:15,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:38:15,439 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:38:15,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:38:15,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:38:15,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:38:15,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:38:15,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:38:15,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:38:15,440 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:38:15,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:38:15,441 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:38:15,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:38:15,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:38:15,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:38:15,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:38:15,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:38:15,442 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:38:15,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:38:15,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:38:15,442 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:38:15,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:38:15,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:38:15,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:38:15,442 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:38:15,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:38:15,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:38:15,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:38:15,702 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:38:15,703 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:38:15,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2023-04-01 12:38:16,926 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:38:17,277 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:38:17,278 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2023-04-01 12:38:17,304 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3288e911/4f9a45ef54804666b1a6a88c6e62f652/FLAG2b11b46cf [2023-04-01 12:38:17,320 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3288e911/4f9a45ef54804666b1a6a88c6e62f652 [2023-04-01 12:38:17,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:38:17,324 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:38:17,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:38:17,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:38:17,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:38:17,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:38:17" (1/1) ... [2023-04-01 12:38:17,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e161d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:17, skipping insertion in model container [2023-04-01 12:38:17,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:38:17" (1/1) ... [2023-04-01 12:38:17,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:38:17,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:38:17,768 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[7184,7197] [2023-04-01 12:38:17,811 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[11285,11298] [2023-04-01 12:38:17,854 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[18315,18328] [2023-04-01 12:38:17,902 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[24747,24760] [2023-04-01 12:38:17,980 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[43722,43735] [2023-04-01 12:38:18,071 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[71504,71517] [2023-04-01 12:38:18,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:38:18,260 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:38:18,299 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[7184,7197] [2023-04-01 12:38:18,315 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[11285,11298] [2023-04-01 12:38:18,334 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[18315,18328] [2023-04-01 12:38:18,353 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[24747,24760] [2023-04-01 12:38:18,411 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[43722,43735] [2023-04-01 12:38:18,467 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[71504,71517] [2023-04-01 12:38:18,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:38:18,561 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:38:18,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:18 WrapperNode [2023-04-01 12:38:18,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:38:18,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:38:18,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:38:18,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:38:18,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:18" (1/1) ... [2023-04-01 12:38:18,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:18" (1/1) ... [2023-04-01 12:38:18,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:18" (1/1) ... [2023-04-01 12:38:18,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:18" (1/1) ... [2023-04-01 12:38:18,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:18" (1/1) ... [2023-04-01 12:38:18,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:18" (1/1) ... [2023-04-01 12:38:18,712 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:18" (1/1) ... [2023-04-01 12:38:18,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:18" (1/1) ... [2023-04-01 12:38:18,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:38:18,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:38:18,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:38:18,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:38:18,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:18" (1/1) ... [2023-04-01 12:38:18,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:38:18,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:38:18,782 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 12:38:18,802 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 12:38:18,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:38:18,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:38:18,819 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:38:18,819 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:38:18,819 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:38:18,819 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:38:18,819 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:38:18,819 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:38:18,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:38:18,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:38:18,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:38:18,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 12:38:18,820 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:38:18,820 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:38:18,820 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:38:18,820 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:38:18,820 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:38:18,820 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:38:18,820 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:38:18,821 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:38:18,821 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:38:18,821 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:38:18,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:38:18,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:38:18,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:38:18,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:38:18,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:38:18,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:38:19,110 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:38:19,112 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:38:21,542 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:38:21,874 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:38:21,874 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:38:21,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:38:21 BoogieIcfgContainer [2023-04-01 12:38:21,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:38:21,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:38:21,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:38:21,884 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:38:21,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:38:17" (1/3) ... [2023-04-01 12:38:21,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c18ec3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:38:21, skipping insertion in model container [2023-04-01 12:38:21,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:18" (2/3) ... [2023-04-01 12:38:21,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c18ec3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:38:21, skipping insertion in model container [2023-04-01 12:38:21,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:38:21" (3/3) ... [2023-04-01 12:38:21,886 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2023-04-01 12:38:21,902 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:38:21,902 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-04-01 12:38:21,965 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:38:21,971 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;@16398d2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:38:21,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-04-01 12:38:21,980 INFO L276 IsEmpty]: Start isEmpty. Operand has 1182 states, 1171 states have (on average 1.8078565328778822) internal successors, (2117), 1177 states have internal predecessors, (2117), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 12:38:22,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 12:38:22,001 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:22,002 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] [2023-04-01 12:38:22,002 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:22,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:22,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1761931692, now seen corresponding path program 1 times [2023-04-01 12:38:22,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:22,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693518676] [2023-04-01 12:38:22,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:22,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:22,534 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 12:38:22,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:22,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693518676] [2023-04-01 12:38:22,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693518676] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:22,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:22,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:38:22,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215692054] [2023-04-01 12:38:22,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:22,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:38:22,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:22,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:38:22,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:38:22,572 INFO L87 Difference]: Start difference. First operand has 1182 states, 1171 states have (on average 1.8078565328778822) internal successors, (2117), 1177 states have internal predecessors, (2117), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:24,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:24,020 INFO L93 Difference]: Finished difference Result 2270 states and 3974 transitions. [2023-04-01 12:38:24,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:38:24,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-04-01 12:38:24,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:24,037 INFO L225 Difference]: With dead ends: 2270 [2023-04-01 12:38:24,038 INFO L226 Difference]: Without dead ends: 1418 [2023-04-01 12:38:24,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:38:24,046 INFO L413 NwaCegarLoop]: 931 mSDtfsCounter, 6470 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6470 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:24,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6470 Valid, 1341 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 12:38:24,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2023-04-01 12:38:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1412. [2023-04-01 12:38:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1403 states have (on average 1.3193157519600855) internal successors, (1851), 1408 states have internal predecessors, (1851), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 1854 transitions. [2023-04-01 12:38:24,154 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 1854 transitions. Word has length 54 [2023-04-01 12:38:24,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:24,155 INFO L495 AbstractCegarLoop]: Abstraction has 1412 states and 1854 transitions. [2023-04-01 12:38:24,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:24,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 1854 transitions. [2023-04-01 12:38:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 12:38:24,158 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:24,159 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] [2023-04-01 12:38:24,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:38:24,159 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:24,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:24,160 INFO L85 PathProgramCache]: Analyzing trace with hash 94503601, now seen corresponding path program 1 times [2023-04-01 12:38:24,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:24,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315779300] [2023-04-01 12:38:24,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:24,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:24,395 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 12:38:24,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:24,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315779300] [2023-04-01 12:38:24,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315779300] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:24,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:24,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:38:24,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798531907] [2023-04-01 12:38:24,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:24,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:38:24,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:24,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:38:24,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:38:24,401 INFO L87 Difference]: Start difference. First operand 1412 states and 1854 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:25,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:25,443 INFO L93 Difference]: Finished difference Result 2826 states and 3739 transitions. [2023-04-01 12:38:25,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:38:25,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-04-01 12:38:25,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:25,451 INFO L225 Difference]: With dead ends: 2826 [2023-04-01 12:38:25,451 INFO L226 Difference]: Without dead ends: 1950 [2023-04-01 12:38:25,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:38:25,454 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 4436 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4436 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:25,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4436 Valid, 846 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 12:38:25,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2023-04-01 12:38:25,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1938. [2023-04-01 12:38:25,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1929 states have (on average 1.3291861067910835) internal successors, (2564), 1934 states have internal predecessors, (2564), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:25,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 2567 transitions. [2023-04-01 12:38:25,541 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 2567 transitions. Word has length 55 [2023-04-01 12:38:25,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:25,542 INFO L495 AbstractCegarLoop]: Abstraction has 1938 states and 2567 transitions. [2023-04-01 12:38:25,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:25,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 2567 transitions. [2023-04-01 12:38:25,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 12:38:25,545 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:25,546 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] [2023-04-01 12:38:25,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:38:25,546 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:25,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:25,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1203569634, now seen corresponding path program 1 times [2023-04-01 12:38:25,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:25,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817144831] [2023-04-01 12:38:25,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:25,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:25,682 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 12:38:25,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:25,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817144831] [2023-04-01 12:38:25,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817144831] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:25,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:25,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:38:25,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059768572] [2023-04-01 12:38:25,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:25,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:38:25,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:25,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:38:25,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:38:25,684 INFO L87 Difference]: Start difference. First operand 1938 states and 2567 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:26,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:26,677 INFO L93 Difference]: Finished difference Result 3911 states and 5221 transitions. [2023-04-01 12:38:26,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:38:26,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-04-01 12:38:26,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:26,688 INFO L225 Difference]: With dead ends: 3911 [2023-04-01 12:38:26,688 INFO L226 Difference]: Without dead ends: 2624 [2023-04-01 12:38:26,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:38:26,693 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 3827 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3827 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:26,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3827 Valid, 738 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 12:38:26,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2023-04-01 12:38:26,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 2614. [2023-04-01 12:38:26,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2614 states, 2605 states have (on average 1.3197696737044147) internal successors, (3438), 2610 states have internal predecessors, (3438), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:26,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2614 states to 2614 states and 3441 transitions. [2023-04-01 12:38:26,845 INFO L78 Accepts]: Start accepts. Automaton has 2614 states and 3441 transitions. Word has length 55 [2023-04-01 12:38:26,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:26,848 INFO L495 AbstractCegarLoop]: Abstraction has 2614 states and 3441 transitions. [2023-04-01 12:38:26,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:26,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2614 states and 3441 transitions. [2023-04-01 12:38:26,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 12:38:26,852 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:26,852 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] [2023-04-01 12:38:26,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:38:26,853 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:26,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:26,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1700731340, now seen corresponding path program 1 times [2023-04-01 12:38:26,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:26,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034119239] [2023-04-01 12:38:26,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:26,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:27,429 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 12:38:27,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:27,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034119239] [2023-04-01 12:38:27,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034119239] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:27,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:27,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:38:27,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361975801] [2023-04-01 12:38:27,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:27,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:38:27,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:27,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:38:27,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:38:27,431 INFO L87 Difference]: Start difference. First operand 2614 states and 3441 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:30,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:30,000 INFO L93 Difference]: Finished difference Result 4836 states and 6461 transitions. [2023-04-01 12:38:30,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:38:30,001 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-01 12:38:30,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:30,019 INFO L225 Difference]: With dead ends: 4836 [2023-04-01 12:38:30,020 INFO L226 Difference]: Without dead ends: 4463 [2023-04-01 12:38:30,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2023-04-01 12:38:30,032 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 5280 mSDsluCounter, 2481 mSDsCounter, 0 mSdLazyCounter, 3755 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5280 SdHoareTripleChecker+Valid, 3065 SdHoareTripleChecker+Invalid, 3828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:30,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5280 Valid, 3065 Invalid, 3828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3755 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 12:38:30,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4463 states. [2023-04-01 12:38:30,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4463 to 2614. [2023-04-01 12:38:30,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2614 states, 2605 states have (on average 1.3193857965451055) internal successors, (3437), 2610 states have internal predecessors, (3437), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:30,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2614 states to 2614 states and 3440 transitions. [2023-04-01 12:38:30,294 INFO L78 Accepts]: Start accepts. Automaton has 2614 states and 3440 transitions. Word has length 56 [2023-04-01 12:38:30,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:30,295 INFO L495 AbstractCegarLoop]: Abstraction has 2614 states and 3440 transitions. [2023-04-01 12:38:30,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:30,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2614 states and 3440 transitions. [2023-04-01 12:38:30,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 12:38:30,299 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:30,299 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] [2023-04-01 12:38:30,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:38:30,299 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:30,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:30,300 INFO L85 PathProgramCache]: Analyzing trace with hash 767132385, now seen corresponding path program 1 times [2023-04-01 12:38:30,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:30,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901521833] [2023-04-01 12:38:30,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:30,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:30,714 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 12:38:30,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:30,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901521833] [2023-04-01 12:38:30,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901521833] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:30,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:30,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:38:30,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597653808] [2023-04-01 12:38:30,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:30,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:38:30,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:30,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:38:30,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:38:30,716 INFO L87 Difference]: Start difference. First operand 2614 states and 3440 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:32,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:32,852 INFO L93 Difference]: Finished difference Result 3574 states and 4705 transitions. [2023-04-01 12:38:32,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:38:32,853 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-01 12:38:32,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:32,869 INFO L225 Difference]: With dead ends: 3574 [2023-04-01 12:38:32,870 INFO L226 Difference]: Without dead ends: 3569 [2023-04-01 12:38:32,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-04-01 12:38:32,872 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 5446 mSDsluCounter, 1816 mSDsCounter, 0 mSdLazyCounter, 2662 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5446 SdHoareTripleChecker+Valid, 2382 SdHoareTripleChecker+Invalid, 2714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:32,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5446 Valid, 2382 Invalid, 2714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 2662 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 12:38:32,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3569 states. [2023-04-01 12:38:33,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3569 to 2614. [2023-04-01 12:38:33,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2614 states, 2605 states have (on average 1.3190019193857965) internal successors, (3436), 2610 states have internal predecessors, (3436), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:33,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2614 states to 2614 states and 3439 transitions. [2023-04-01 12:38:33,128 INFO L78 Accepts]: Start accepts. Automaton has 2614 states and 3439 transitions. Word has length 56 [2023-04-01 12:38:33,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:33,128 INFO L495 AbstractCegarLoop]: Abstraction has 2614 states and 3439 transitions. [2023-04-01 12:38:33,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:33,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2614 states and 3439 transitions. [2023-04-01 12:38:33,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 12:38:33,132 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:33,132 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] [2023-04-01 12:38:33,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:38:33,132 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:33,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:33,133 INFO L85 PathProgramCache]: Analyzing trace with hash 309495063, now seen corresponding path program 1 times [2023-04-01 12:38:33,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:33,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395148466] [2023-04-01 12:38:33,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:33,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:33,482 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 12:38:33,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:33,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395148466] [2023-04-01 12:38:33,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395148466] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:33,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:33,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 12:38:33,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777733704] [2023-04-01 12:38:33,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:33,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 12:38:33,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:33,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 12:38:33,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 12:38:33,484 INFO L87 Difference]: Start difference. First operand 2614 states and 3439 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:35,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:35,057 INFO L93 Difference]: Finished difference Result 4096 states and 5494 transitions. [2023-04-01 12:38:35,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 12:38:35,057 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-01 12:38:35,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:35,071 INFO L225 Difference]: With dead ends: 4096 [2023-04-01 12:38:35,072 INFO L226 Difference]: Without dead ends: 3625 [2023-04-01 12:38:35,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-04-01 12:38:35,075 INFO L413 NwaCegarLoop]: 536 mSDtfsCounter, 5827 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 1852 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5827 SdHoareTripleChecker+Valid, 1791 SdHoareTripleChecker+Invalid, 1870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:35,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5827 Valid, 1791 Invalid, 1870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1852 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 12:38:35,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3625 states. [2023-04-01 12:38:35,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3625 to 2614. [2023-04-01 12:38:35,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2614 states, 2605 states have (on average 1.3186180422264875) internal successors, (3435), 2610 states have internal predecessors, (3435), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:35,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2614 states to 2614 states and 3438 transitions. [2023-04-01 12:38:35,331 INFO L78 Accepts]: Start accepts. Automaton has 2614 states and 3438 transitions. Word has length 56 [2023-04-01 12:38:35,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:35,332 INFO L495 AbstractCegarLoop]: Abstraction has 2614 states and 3438 transitions. [2023-04-01 12:38:35,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:35,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2614 states and 3438 transitions. [2023-04-01 12:38:35,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 12:38:35,335 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:35,335 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] [2023-04-01 12:38:35,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:38:35,335 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:35,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:35,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1089640708, now seen corresponding path program 1 times [2023-04-01 12:38:35,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:35,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125892653] [2023-04-01 12:38:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:35,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:35,422 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 12:38:35,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:35,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125892653] [2023-04-01 12:38:35,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125892653] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:35,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:35,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:35,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105331099] [2023-04-01 12:38:35,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:35,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:35,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:35,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:35,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:35,425 INFO L87 Difference]: Start difference. First operand 2614 states and 3438 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:35,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:35,833 INFO L93 Difference]: Finished difference Result 3207 states and 4300 transitions. [2023-04-01 12:38:35,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:35,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-01 12:38:35,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:35,844 INFO L225 Difference]: With dead ends: 3207 [2023-04-01 12:38:35,845 INFO L226 Difference]: Without dead ends: 2552 [2023-04-01 12:38:35,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:35,848 INFO L413 NwaCegarLoop]: 1015 mSDtfsCounter, 496 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:35,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 1554 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:35,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2023-04-01 12:38:36,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2550. [2023-04-01 12:38:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2541 states have (on average 1.3286107831562377) internal successors, (3376), 2546 states have internal predecessors, (3376), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:36,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 3379 transitions. [2023-04-01 12:38:36,229 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 3379 transitions. Word has length 57 [2023-04-01 12:38:36,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:36,230 INFO L495 AbstractCegarLoop]: Abstraction has 2550 states and 3379 transitions. [2023-04-01 12:38:36,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 3379 transitions. [2023-04-01 12:38:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 12:38:36,234 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:36,234 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] [2023-04-01 12:38:36,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:38:36,234 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:36,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:36,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1888815628, now seen corresponding path program 1 times [2023-04-01 12:38:36,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:36,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775988025] [2023-04-01 12:38:36,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:36,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:36,313 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 12:38:36,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:36,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775988025] [2023-04-01 12:38:36,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775988025] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:36,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:36,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:36,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830159798] [2023-04-01 12:38:36,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:36,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:36,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:36,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:36,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:36,323 INFO L87 Difference]: Start difference. First operand 2550 states and 3379 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:36,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:36,754 INFO L93 Difference]: Finished difference Result 3606 states and 4896 transitions. [2023-04-01 12:38:36,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:36,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-01 12:38:36,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:36,764 INFO L225 Difference]: With dead ends: 3606 [2023-04-01 12:38:36,764 INFO L226 Difference]: Without dead ends: 2717 [2023-04-01 12:38:36,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:36,768 INFO L413 NwaCegarLoop]: 999 mSDtfsCounter, 469 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1538 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:36,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 1538 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:36,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2717 states. [2023-04-01 12:38:37,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2717 to 2715. [2023-04-01 12:38:37,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2706 states have (on average 1.3333333333333333) internal successors, (3608), 2711 states have internal predecessors, (3608), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:37,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 3611 transitions. [2023-04-01 12:38:37,175 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 3611 transitions. Word has length 57 [2023-04-01 12:38:37,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:37,176 INFO L495 AbstractCegarLoop]: Abstraction has 2715 states and 3611 transitions. [2023-04-01 12:38:37,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:37,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 3611 transitions. [2023-04-01 12:38:37,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 12:38:37,178 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:37,178 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] [2023-04-01 12:38:37,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:38:37,179 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:37,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:37,179 INFO L85 PathProgramCache]: Analyzing trace with hash 978401362, now seen corresponding path program 1 times [2023-04-01 12:38:37,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:37,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195090857] [2023-04-01 12:38:37,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:37,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:37,251 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 12:38:37,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:37,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195090857] [2023-04-01 12:38:37,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195090857] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:37,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:37,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:37,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745684015] [2023-04-01 12:38:37,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:37,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:37,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:37,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:37,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:37,255 INFO L87 Difference]: Start difference. First operand 2715 states and 3611 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:37,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:37,933 INFO L93 Difference]: Finished difference Result 5496 states and 7470 transitions. [2023-04-01 12:38:37,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:37,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-01 12:38:37,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:37,954 INFO L225 Difference]: With dead ends: 5496 [2023-04-01 12:38:37,954 INFO L226 Difference]: Without dead ends: 3759 [2023-04-01 12:38:37,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:37,960 INFO L413 NwaCegarLoop]: 1023 mSDtfsCounter, 542 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:37,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 1702 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:37,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2023-04-01 12:38:38,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3753. [2023-04-01 12:38:38,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3744 states have (on average 1.3298611111111112) internal successors, (4979), 3749 states have internal predecessors, (4979), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:38,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 4982 transitions. [2023-04-01 12:38:38,656 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 4982 transitions. Word has length 57 [2023-04-01 12:38:38,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:38,656 INFO L495 AbstractCegarLoop]: Abstraction has 3753 states and 4982 transitions. [2023-04-01 12:38:38,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:38,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 4982 transitions. [2023-04-01 12:38:38,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 12:38:38,660 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:38,660 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] [2023-04-01 12:38:38,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:38:38,660 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:38,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:38,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1360688730, now seen corresponding path program 1 times [2023-04-01 12:38:38,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:38,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369880247] [2023-04-01 12:38:38,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:38,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:38,728 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 12:38:38,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:38,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369880247] [2023-04-01 12:38:38,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369880247] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:38,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:38,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:38,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640186687] [2023-04-01 12:38:38,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:38,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:38,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:38,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:38,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:38,730 INFO L87 Difference]: Start difference. First operand 3753 states and 4982 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:39,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:39,522 INFO L93 Difference]: Finished difference Result 6753 states and 9034 transitions. [2023-04-01 12:38:39,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:39,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-01 12:38:39,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:39,533 INFO L225 Difference]: With dead ends: 6753 [2023-04-01 12:38:39,533 INFO L226 Difference]: Without dead ends: 3493 [2023-04-01 12:38:39,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:39,540 INFO L413 NwaCegarLoop]: 877 mSDtfsCounter, 759 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:39,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 1279 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:39,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3493 states. [2023-04-01 12:38:40,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3493 to 2769. [2023-04-01 12:38:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2769 states, 2760 states have (on average 1.326449275362319) internal successors, (3661), 2765 states have internal predecessors, (3661), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2769 states to 2769 states and 3664 transitions. [2023-04-01 12:38:40,079 INFO L78 Accepts]: Start accepts. Automaton has 2769 states and 3664 transitions. Word has length 58 [2023-04-01 12:38:40,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:40,080 INFO L495 AbstractCegarLoop]: Abstraction has 2769 states and 3664 transitions. [2023-04-01 12:38:40,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2769 states and 3664 transitions. [2023-04-01 12:38:40,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 12:38:40,085 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:40,085 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] [2023-04-01 12:38:40,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 12:38:40,086 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:40,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:40,089 INFO L85 PathProgramCache]: Analyzing trace with hash -414637218, now seen corresponding path program 1 times [2023-04-01 12:38:40,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:40,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317214776] [2023-04-01 12:38:40,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:40,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:40,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:40,156 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 12:38:40,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:40,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317214776] [2023-04-01 12:38:40,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317214776] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:40,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:40,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:40,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760173683] [2023-04-01 12:38:40,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:40,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:40,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:40,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:40,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:40,158 INFO L87 Difference]: Start difference. First operand 2769 states and 3664 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:40,773 INFO L93 Difference]: Finished difference Result 5233 states and 7027 transitions. [2023-04-01 12:38:40,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:40,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-01 12:38:40,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:40,780 INFO L225 Difference]: With dead ends: 5233 [2023-04-01 12:38:40,780 INFO L226 Difference]: Without dead ends: 3002 [2023-04-01 12:38:40,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:40,786 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 643 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:40,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 923 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:40,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2023-04-01 12:38:41,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 2415. [2023-04-01 12:38:41,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 2407 states have (on average 1.3373493975903614) internal successors, (3219), 2411 states have internal predecessors, (3219), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:41,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 3222 transitions. [2023-04-01 12:38:41,264 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 3222 transitions. Word has length 58 [2023-04-01 12:38:41,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:41,264 INFO L495 AbstractCegarLoop]: Abstraction has 2415 states and 3222 transitions. [2023-04-01 12:38:41,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:41,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 3222 transitions. [2023-04-01 12:38:41,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 12:38:41,266 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:41,266 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] [2023-04-01 12:38:41,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 12:38:41,267 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr5ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:41,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:41,267 INFO L85 PathProgramCache]: Analyzing trace with hash -221824163, now seen corresponding path program 1 times [2023-04-01 12:38:41,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:41,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149171839] [2023-04-01 12:38:41,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:41,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:41,330 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 12:38:41,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:41,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149171839] [2023-04-01 12:38:41,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149171839] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:41,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:41,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:41,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877956234] [2023-04-01 12:38:41,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:41,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:41,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:41,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:41,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:41,332 INFO L87 Difference]: Start difference. First operand 2415 states and 3222 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:41,925 INFO L93 Difference]: Finished difference Result 4393 states and 5954 transitions. [2023-04-01 12:38:41,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:41,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-01 12:38:41,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:41,931 INFO L225 Difference]: With dead ends: 4393 [2023-04-01 12:38:41,931 INFO L226 Difference]: Without dead ends: 2394 [2023-04-01 12:38:41,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:41,935 INFO L413 NwaCegarLoop]: 540 mSDtfsCounter, 488 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:41,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 721 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:41,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2023-04-01 12:38:42,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 2115. [2023-04-01 12:38:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 2108 states have (on average 1.3410815939278937) internal successors, (2827), 2111 states have internal predecessors, (2827), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:42,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 2830 transitions. [2023-04-01 12:38:42,342 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 2830 transitions. Word has length 58 [2023-04-01 12:38:42,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:42,342 INFO L495 AbstractCegarLoop]: Abstraction has 2115 states and 2830 transitions. [2023-04-01 12:38:42,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 2830 transitions. [2023-04-01 12:38:42,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 12:38:42,344 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:42,344 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 12:38:42,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 12:38:42,344 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:42,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:42,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1519309459, now seen corresponding path program 1 times [2023-04-01 12:38:42,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:42,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304864601] [2023-04-01 12:38:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:42,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:43,040 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 12:38:43,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:43,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304864601] [2023-04-01 12:38:43,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304864601] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:43,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:43,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 12:38:43,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172350067] [2023-04-01 12:38:43,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:43,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 12:38:43,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:43,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 12:38:43,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-01 12:38:43,042 INFO L87 Difference]: Start difference. First operand 2115 states and 2830 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:45,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:45,670 INFO L93 Difference]: Finished difference Result 5247 states and 6996 transitions. [2023-04-01 12:38:45,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 12:38:45,670 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-04-01 12:38:45,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:45,677 INFO L225 Difference]: With dead ends: 5247 [2023-04-01 12:38:45,678 INFO L226 Difference]: Without dead ends: 5016 [2023-04-01 12:38:45,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2023-04-01 12:38:45,679 INFO L413 NwaCegarLoop]: 834 mSDtfsCounter, 3083 mSDsluCounter, 3283 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3083 SdHoareTripleChecker+Valid, 4117 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:45,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3083 Valid, 4117 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 12:38:45,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5016 states. [2023-04-01 12:38:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5016 to 2094. [2023-04-01 12:38:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2088 states have (on average 1.3414750957854407) internal successors, (2801), 2090 states have internal predecessors, (2801), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:46,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 2804 transitions. [2023-04-01 12:38:46,148 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 2804 transitions. Word has length 59 [2023-04-01 12:38:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:46,148 INFO L495 AbstractCegarLoop]: Abstraction has 2094 states and 2804 transitions. [2023-04-01 12:38:46,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:46,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 2804 transitions. [2023-04-01 12:38:46,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 12:38:46,150 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:46,150 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 12:38:46,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 12:38:46,150 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:46,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:46,151 INFO L85 PathProgramCache]: Analyzing trace with hash -962400079, now seen corresponding path program 1 times [2023-04-01 12:38:46,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:46,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903263949] [2023-04-01 12:38:46,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:46,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:47,131 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 12:38:47,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:47,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903263949] [2023-04-01 12:38:47,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903263949] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:47,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:47,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-01 12:38:47,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294887717] [2023-04-01 12:38:47,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:47,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 12:38:47,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:47,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 12:38:47,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2023-04-01 12:38:47,133 INFO L87 Difference]: Start difference. First operand 2094 states and 2804 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:50,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:50,543 INFO L93 Difference]: Finished difference Result 4048 states and 5385 transitions. [2023-04-01 12:38:50,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 12:38:50,544 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-04-01 12:38:50,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:50,552 INFO L225 Difference]: With dead ends: 4048 [2023-04-01 12:38:50,553 INFO L226 Difference]: Without dead ends: 4044 [2023-04-01 12:38:50,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 12:38:50,555 INFO L413 NwaCegarLoop]: 627 mSDtfsCounter, 2582 mSDsluCounter, 6452 mSDsCounter, 0 mSdLazyCounter, 2786 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2582 SdHoareTripleChecker+Valid, 7079 SdHoareTripleChecker+Invalid, 2817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:50,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2582 Valid, 7079 Invalid, 2817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2786 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 12:38:50,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4044 states. [2023-04-01 12:38:51,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4044 to 2101. [2023-04-01 12:38:51,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2095 states have (on average 1.3412887828162292) internal successors, (2810), 2097 states have internal predecessors, (2810), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:51,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 2813 transitions. [2023-04-01 12:38:51,151 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 2813 transitions. Word has length 59 [2023-04-01 12:38:51,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:51,151 INFO L495 AbstractCegarLoop]: Abstraction has 2101 states and 2813 transitions. [2023-04-01 12:38:51,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:51,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 2813 transitions. [2023-04-01 12:38:51,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 12:38:51,153 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:51,153 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 12:38:51,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 12:38:51,154 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:51,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:51,154 INFO L85 PathProgramCache]: Analyzing trace with hash -97841705, now seen corresponding path program 1 times [2023-04-01 12:38:51,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:51,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048355056] [2023-04-01 12:38:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:51,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:51,669 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 12:38:51,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:51,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048355056] [2023-04-01 12:38:51,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048355056] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:51,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:51,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 12:38:51,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430056017] [2023-04-01 12:38:51,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:51,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 12:38:51,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:51,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 12:38:51,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-01 12:38:51,671 INFO L87 Difference]: Start difference. First operand 2101 states and 2813 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:53,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:53,984 INFO L93 Difference]: Finished difference Result 4582 states and 6142 transitions. [2023-04-01 12:38:53,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 12:38:53,985 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-04-01 12:38:53,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:53,991 INFO L225 Difference]: With dead ends: 4582 [2023-04-01 12:38:53,991 INFO L226 Difference]: Without dead ends: 4360 [2023-04-01 12:38:53,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-04-01 12:38:53,993 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 2999 mSDsluCounter, 2904 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2999 SdHoareTripleChecker+Valid, 3613 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:53,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2999 Valid, 3613 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 12:38:53,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4360 states. [2023-04-01 12:38:54,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4360 to 2089. [2023-04-01 12:38:54,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2084 states have (on average 1.3416506717850287) internal successors, (2796), 2085 states have internal predecessors, (2796), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 2799 transitions. [2023-04-01 12:38:54,568 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 2799 transitions. Word has length 59 [2023-04-01 12:38:54,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:54,569 INFO L495 AbstractCegarLoop]: Abstraction has 2089 states and 2799 transitions. [2023-04-01 12:38:54,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:54,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 2799 transitions. [2023-04-01 12:38:54,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 12:38:54,571 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:54,571 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 12:38:54,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 12:38:54,571 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:54,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:54,572 INFO L85 PathProgramCache]: Analyzing trace with hash 612934603, now seen corresponding path program 1 times [2023-04-01 12:38:54,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:54,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134097343] [2023-04-01 12:38:54,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:54,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:55,384 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 12:38:55,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:55,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134097343] [2023-04-01 12:38:55,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134097343] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:55,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:55,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 12:38:55,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493604357] [2023-04-01 12:38:55,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:55,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 12:38:55,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:55,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 12:38:55,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:38:55,386 INFO L87 Difference]: Start difference. First operand 2089 states and 2799 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:58,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:58,548 INFO L93 Difference]: Finished difference Result 4030 states and 5374 transitions. [2023-04-01 12:38:58,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 12:38:58,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2023-04-01 12:38:58,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:58,553 INFO L225 Difference]: With dead ends: 4030 [2023-04-01 12:38:58,553 INFO L226 Difference]: Without dead ends: 4026 [2023-04-01 12:38:58,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2023-04-01 12:38:58,558 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 3213 mSDsluCounter, 5046 mSDsCounter, 0 mSdLazyCounter, 2088 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3213 SdHoareTripleChecker+Valid, 5705 SdHoareTripleChecker+Invalid, 2112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:58,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3213 Valid, 5705 Invalid, 2112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2088 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 12:38:58,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2023-04-01 12:38:59,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 2078. [2023-04-01 12:38:59,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 2074 states have (on average 1.3418514946962392) internal successors, (2783), 2074 states have internal predecessors, (2783), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:59,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 2786 transitions. [2023-04-01 12:38:59,329 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 2786 transitions. Word has length 60 [2023-04-01 12:38:59,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:59,329 INFO L495 AbstractCegarLoop]: Abstraction has 2078 states and 2786 transitions. [2023-04-01 12:38:59,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:59,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 2786 transitions. [2023-04-01 12:38:59,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 12:38:59,331 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:59,331 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] [2023-04-01 12:38:59,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 12:38:59,331 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:38:59,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:59,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2014005002, now seen corresponding path program 1 times [2023-04-01 12:38:59,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:59,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95964342] [2023-04-01 12:38:59,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:59,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:59,490 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 12:38:59,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:59,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95964342] [2023-04-01 12:38:59,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95964342] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:59,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:59,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:38:59,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743725510] [2023-04-01 12:38:59,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:59,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:38:59,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:59,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:38:59,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:38:59,492 INFO L87 Difference]: Start difference. First operand 2078 states and 2786 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:39:00,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:39:00,210 INFO L93 Difference]: Finished difference Result 3468 states and 4721 transitions. [2023-04-01 12:39:00,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:39:00,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2023-04-01 12:39:00,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:39:00,212 INFO L225 Difference]: With dead ends: 3468 [2023-04-01 12:39:00,212 INFO L226 Difference]: Without dead ends: 1874 [2023-04-01 12:39:00,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:39:00,216 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 808 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:39:00,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [808 Valid, 667 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:39:00,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2023-04-01 12:39:00,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1870. [2023-04-01 12:39:00,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1866 states have (on average 1.330117899249732) internal successors, (2482), 1866 states have internal predecessors, (2482), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:39:00,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2485 transitions. [2023-04-01 12:39:00,973 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2485 transitions. Word has length 62 [2023-04-01 12:39:00,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:39:00,973 INFO L495 AbstractCegarLoop]: Abstraction has 1870 states and 2485 transitions. [2023-04-01 12:39:00,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:39:00,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2485 transitions. [2023-04-01 12:39:00,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 12:39:00,975 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:39:00,975 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] [2023-04-01 12:39:00,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 12:39:00,975 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:39:00,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:39:00,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1858428413, now seen corresponding path program 1 times [2023-04-01 12:39:00,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:39:00,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314281328] [2023-04-01 12:39:00,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:39:00,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:39:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:39:01,138 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 12:39:01,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:39:01,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314281328] [2023-04-01 12:39:01,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314281328] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:39:01,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:39:01,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:39:01,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122487222] [2023-04-01 12:39:01,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:39:01,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:39:01,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:39:01,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:39:01,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:39:01,140 INFO L87 Difference]: Start difference. First operand 1870 states and 2485 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:39:02,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:39:02,032 INFO L93 Difference]: Finished difference Result 3942 states and 5377 transitions. [2023-04-01 12:39:02,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:39:02,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2023-04-01 12:39:02,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:39:02,037 INFO L225 Difference]: With dead ends: 3942 [2023-04-01 12:39:02,037 INFO L226 Difference]: Without dead ends: 2652 [2023-04-01 12:39:02,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:39:02,042 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 281 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:39:02,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 694 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:39:02,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2023-04-01 12:39:02,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2420. [2023-04-01 12:39:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 2416 states have (on average 1.3331953642384107) internal successors, (3221), 2416 states have internal predecessors, (3221), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:39:02,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 3224 transitions. [2023-04-01 12:39:02,895 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 3224 transitions. Word has length 62 [2023-04-01 12:39:02,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:39:02,896 INFO L495 AbstractCegarLoop]: Abstraction has 2420 states and 3224 transitions. [2023-04-01 12:39:02,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:39:02,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 3224 transitions. [2023-04-01 12:39:02,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-01 12:39:02,898 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:39:02,898 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] [2023-04-01 12:39:02,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-01 12:39:02,898 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-04-01 12:39:02,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:39:02,899 INFO L85 PathProgramCache]: Analyzing trace with hash 888754277, now seen corresponding path program 1 times [2023-04-01 12:39:02,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:39:02,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095499310] [2023-04-01 12:39:02,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:39:02,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:39:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:39:03,031 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 12:39:03,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:39:03,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095499310] [2023-04-01 12:39:03,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095499310] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:39:03,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:39:03,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:39:03,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800760021] [2023-04-01 12:39:03,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:39:03,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:39:03,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:39:03,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:39:03,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:39:03,034 INFO L87 Difference]: Start difference. First operand 2420 states and 3224 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)