/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:32:00,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:32:00,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:32:00,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:32:00,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:32:00,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:32:00,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:32:00,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:32:00,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:32:00,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:32:00,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:32:00,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:32:00,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:32:00,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:32:00,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:32:00,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:32:00,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:32:00,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:32:00,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:32:00,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:32:00,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:32:00,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:32:00,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:32:00,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:32:00,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:32:00,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:32:00,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:32:00,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:32:00,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:32:00,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:32:00,232 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:32:00,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:32:00,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:32:00,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:32:00,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:32:00,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:32:00,235 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:32:00,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:32:00,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:32:00,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:32:00,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:32:00,236 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:32:00,265 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:32:00,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:32:00,266 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:32:00,266 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:32:00,267 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:32:00,267 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:32:00,267 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:32:00,267 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:32:00,267 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:32:00,267 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:32:00,268 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:32:00,268 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:32:00,268 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:32:00,268 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:32:00,268 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:32:00,268 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:32:00,268 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:32:00,268 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:32:00,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:32:00,269 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:32:00,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:32:00,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:32:00,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:32:00,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:32:00,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:32:00,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:32:00,270 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:32:00,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:32:00,270 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:32:00,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:32:00,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:32:00,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:32:00,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:32:00,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:32:00,271 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:32:00,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:32:00,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:32:00,271 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:32:00,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:32:00,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:32:00,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:32:00,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:32:00,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:32:00,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:32:00,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:32:00,454 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:32:00,455 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:32:00,456 INFO L432 ainManager$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+lhb-reducer.c [2023-04-01 06:32:01,343 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:32:01,699 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:32:01,699 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+lhb-reducer.c [2023-04-01 06:32:01,713 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9068d220d/ca571829e4304077b8afb0bc94f39acc/FLAG507ee952d [2023-04-01 06:32:01,724 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9068d220d/ca571829e4304077b8afb0bc94f39acc [2023-04-01 06:32:01,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:32:01,727 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:32:01,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:32:01,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:32:01,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:32:01,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:32:01" (1/1) ... [2023-04-01 06:32:01,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@652d493d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:01, skipping insertion in model container [2023-04-01 06:32:01,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:32:01" (1/1) ... [2023-04-01 06:32:01,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:32:01,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:32:01,971 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+lhb-reducer.c[8125,8138] [2023-04-01 06:32:01,994 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+lhb-reducer.c[14955,14968] [2023-04-01 06:32:02,002 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+lhb-reducer.c[17042,17055] [2023-04-01 06:32:02,006 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+lhb-reducer.c[18066,18079] [2023-04-01 06:32:02,110 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:32:02,130 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:32:02,185 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+lhb-reducer.c[8125,8138] [2023-04-01 06:32:02,203 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+lhb-reducer.c[14955,14968] [2023-04-01 06:32:02,210 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+lhb-reducer.c[17042,17055] [2023-04-01 06:32:02,214 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18066,18079] [2023-04-01 06:32:02,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:32:02,344 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:32:02,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:02 WrapperNode [2023-04-01 06:32:02,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:32:02,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:32:02,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:32:02,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:32:02,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:02" (1/1) ... [2023-04-01 06:32:02,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:02" (1/1) ... [2023-04-01 06:32:02,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:02" (1/1) ... [2023-04-01 06:32:02,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:02" (1/1) ... [2023-04-01 06:32:02,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:02" (1/1) ... [2023-04-01 06:32:02,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:02" (1/1) ... [2023-04-01 06:32:02,434 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:02" (1/1) ... [2023-04-01 06:32:02,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:02" (1/1) ... [2023-04-01 06:32:02,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:32:02,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:32:02,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:32:02,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:32:02,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:02" (1/1) ... [2023-04-01 06:32:02,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:32:02,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:32:02,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:32:02,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:32:02,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:32:02,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:32:02,519 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:32:02,520 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:32:02,520 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:32:02,520 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:32:02,520 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:32:02,520 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:32:02,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:32:02,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:32:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:32:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 06:32:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:32:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:32:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:32:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:32:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:32:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:32:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:32:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:32:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:32:02,521 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:32:02,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:32:02,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:32:02,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:32:02,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:32:02,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:32:02,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:32:02,683 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:32:02,685 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:32:03,552 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:32:03,640 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:32:03,640 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:32:03,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:32:03 BoogieIcfgContainer [2023-04-01 06:32:03,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:32:03,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:32:03,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:32:03,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:32:03,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:32:01" (1/3) ... [2023-04-01 06:32:03,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4425eebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:32:03, skipping insertion in model container [2023-04-01 06:32:03,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:02" (2/3) ... [2023-04-01 06:32:03,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4425eebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:32:03, skipping insertion in model container [2023-04-01 06:32:03,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:32:03" (3/3) ... [2023-04-01 06:32:03,651 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-04-01 06:32:03,665 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:32:03,666 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-04-01 06:32:03,721 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:32:03,726 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;@6145ed15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:32:03,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-04-01 06:32:03,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 432 states, 423 states have (on average 1.8557919621749408) internal successors, (785), 427 states have internal predecessors, (785), 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 06:32:03,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 06:32:03,753 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:03,754 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] [2023-04-01 06:32:03,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:03,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:03,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1562041499, now seen corresponding path program 1 times [2023-04-01 06:32:03,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:03,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808517520] [2023-04-01 06:32:03,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:03,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:04,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:04,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808517520] [2023-04-01 06:32:04,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808517520] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:04,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:04,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:32:04,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615651520] [2023-04-01 06:32:04,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:04,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:32:04,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:04,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:32:04,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:32:04,197 INFO L87 Difference]: Start difference. First operand has 432 states, 423 states have (on average 1.8557919621749408) internal successors, (785), 427 states have internal predecessors, (785), 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 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 06:32:04,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:04,312 INFO L93 Difference]: Finished difference Result 648 states and 1132 transitions. [2023-04-01 06:32:04,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:32:04,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 53 [2023-04-01 06:32:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:04,327 INFO L225 Difference]: With dead ends: 648 [2023-04-01 06:32:04,327 INFO L226 Difference]: Without dead ends: 519 [2023-04-01 06:32:04,330 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 06:32:04,332 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 397 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:04,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 1300 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:32:04,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-04-01 06:32:04,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 513. [2023-04-01 06:32:04,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 506 states have (on average 1.3122529644268774) internal successors, (664), 509 states have internal predecessors, (664), 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 06:32:04,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 667 transitions. [2023-04-01 06:32:04,383 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 667 transitions. Word has length 53 [2023-04-01 06:32:04,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:04,383 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 667 transitions. [2023-04-01 06:32:04,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 06:32:04,383 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 667 transitions. [2023-04-01 06:32:04,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 06:32:04,385 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:04,385 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] [2023-04-01 06:32:04,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:32:04,386 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:04,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:04,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1181913160, now seen corresponding path program 1 times [2023-04-01 06:32:04,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:04,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514451685] [2023-04-01 06:32:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:04,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:04,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:04,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514451685] [2023-04-01 06:32:04,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514451685] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:04,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:04,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:32:04,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874295533] [2023-04-01 06:32:04,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:04,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:32:04,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:04,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:32:04,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:32:04,531 INFO L87 Difference]: Start difference. First operand 513 states and 667 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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 06:32:04,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:04,853 INFO L93 Difference]: Finished difference Result 904 states and 1198 transitions. [2023-04-01 06:32:04,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:32:04,853 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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 53 [2023-04-01 06:32:04,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:04,858 INFO L225 Difference]: With dead ends: 904 [2023-04-01 06:32:04,858 INFO L226 Difference]: Without dead ends: 603 [2023-04-01 06:32:04,861 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 06:32:04,862 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1575 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1575 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:04,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1575 Valid, 351 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:32:04,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2023-04-01 06:32:04,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 596. [2023-04-01 06:32:04,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 589 states have (on average 1.3089983022071308) internal successors, (771), 592 states have internal predecessors, (771), 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 06:32:04,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 774 transitions. [2023-04-01 06:32:04,911 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 774 transitions. Word has length 53 [2023-04-01 06:32:04,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:04,912 INFO L495 AbstractCegarLoop]: Abstraction has 596 states and 774 transitions. [2023-04-01 06:32:04,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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 06:32:04,912 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 774 transitions. [2023-04-01 06:32:04,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 06:32:04,914 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:04,915 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] [2023-04-01 06:32:04,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:32:04,915 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:04,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:04,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1075872229, now seen corresponding path program 1 times [2023-04-01 06:32:04,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:04,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878130626] [2023-04-01 06:32:04,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:04,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:05,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:05,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878130626] [2023-04-01 06:32:05,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878130626] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:05,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:05,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:32:05,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158893376] [2023-04-01 06:32:05,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:05,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:32:05,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:05,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:32:05,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:32:05,041 INFO L87 Difference]: Start difference. First operand 596 states and 774 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 06:32:05,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:05,128 INFO L93 Difference]: Finished difference Result 1049 states and 1419 transitions. [2023-04-01 06:32:05,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:32:05,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 53 [2023-04-01 06:32:05,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:05,133 INFO L225 Difference]: With dead ends: 1049 [2023-04-01 06:32:05,133 INFO L226 Difference]: Without dead ends: 817 [2023-04-01 06:32:05,135 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 06:32:05,137 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 262 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:05,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 797 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:32:05,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2023-04-01 06:32:05,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 810. [2023-04-01 06:32:05,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 803 states have (on average 1.3387297633872977) internal successors, (1075), 806 states have internal predecessors, (1075), 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 06:32:05,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1078 transitions. [2023-04-01 06:32:05,179 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1078 transitions. Word has length 53 [2023-04-01 06:32:05,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:05,181 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 1078 transitions. [2023-04-01 06:32:05,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 06:32:05,181 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1078 transitions. [2023-04-01 06:32:05,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 06:32:05,183 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:05,183 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] [2023-04-01 06:32:05,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:32:05,184 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:05,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:05,185 INFO L85 PathProgramCache]: Analyzing trace with hash -557475636, now seen corresponding path program 1 times [2023-04-01 06:32:05,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:05,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192434612] [2023-04-01 06:32:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:05,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:05,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:05,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192434612] [2023-04-01 06:32:05,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192434612] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:05,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:05,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:32:05,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925331331] [2023-04-01 06:32:05,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:05,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:32:05,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:05,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:32:05,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:32:05,310 INFO L87 Difference]: Start difference. First operand 810 states and 1078 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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 06:32:05,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:05,591 INFO L93 Difference]: Finished difference Result 1764 states and 2419 transitions. [2023-04-01 06:32:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:32:05,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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 53 [2023-04-01 06:32:05,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:05,595 INFO L225 Difference]: With dead ends: 1764 [2023-04-01 06:32:05,595 INFO L226 Difference]: Without dead ends: 1109 [2023-04-01 06:32:05,597 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 06:32:05,601 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 1401 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:05,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1401 Valid, 341 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:32:05,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2023-04-01 06:32:05,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1103. [2023-04-01 06:32:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1096 states have (on average 1.3713503649635037) internal successors, (1503), 1099 states have internal predecessors, (1503), 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 06:32:05,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1506 transitions. [2023-04-01 06:32:05,690 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1506 transitions. Word has length 53 [2023-04-01 06:32:05,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:05,690 INFO L495 AbstractCegarLoop]: Abstraction has 1103 states and 1506 transitions. [2023-04-01 06:32:05,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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 06:32:05,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1506 transitions. [2023-04-01 06:32:05,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 06:32:05,692 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:05,692 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 06:32:05,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:32:05,693 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:05,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:05,693 INFO L85 PathProgramCache]: Analyzing trace with hash 511774487, now seen corresponding path program 1 times [2023-04-01 06:32:05,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:05,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557511772] [2023-04-01 06:32:05,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:05,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:05,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:05,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557511772] [2023-04-01 06:32:05,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557511772] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:05,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:05,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:32:05,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094913111] [2023-04-01 06:32:05,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:05,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:32:05,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:05,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:32:05,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:32:05,825 INFO L87 Difference]: Start difference. First operand 1103 states and 1506 transitions. 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 06:32:06,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:06,138 INFO L93 Difference]: Finished difference Result 2813 states and 3930 transitions. [2023-04-01 06:32:06,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:32:06,139 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 06:32:06,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:06,143 INFO L225 Difference]: With dead ends: 2813 [2023-04-01 06:32:06,144 INFO L226 Difference]: Without dead ends: 1800 [2023-04-01 06:32:06,145 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 06:32:06,145 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 1176 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1176 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:06,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1176 Valid, 308 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:32:06,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2023-04-01 06:32:06,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1794. [2023-04-01 06:32:06,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1787 states have (on average 1.3805260212646895) internal successors, (2467), 1790 states have internal predecessors, (2467), 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 06:32:06,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 2470 transitions. [2023-04-01 06:32:06,280 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 2470 transitions. Word has length 54 [2023-04-01 06:32:06,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:06,280 INFO L495 AbstractCegarLoop]: Abstraction has 1794 states and 2470 transitions. [2023-04-01 06:32:06,280 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 06:32:06,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 2470 transitions. [2023-04-01 06:32:06,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 06:32:06,282 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:06,282 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 06:32:06,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:32:06,282 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:06,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:06,282 INFO L85 PathProgramCache]: Analyzing trace with hash -235024366, now seen corresponding path program 1 times [2023-04-01 06:32:06,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:06,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621751598] [2023-04-01 06:32:06,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:06,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:06,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:06,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621751598] [2023-04-01 06:32:06,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621751598] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:06,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:06,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:32:06,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40641481] [2023-04-01 06:32:06,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:06,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:32:06,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:06,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:32:06,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:32:06,355 INFO L87 Difference]: Start difference. First operand 1794 states and 2470 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 06:32:06,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:06,576 INFO L93 Difference]: Finished difference Result 4168 states and 5783 transitions. [2023-04-01 06:32:06,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:32:06,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 55 [2023-04-01 06:32:06,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:06,585 INFO L225 Difference]: With dead ends: 4168 [2023-04-01 06:32:06,585 INFO L226 Difference]: Without dead ends: 2737 [2023-04-01 06:32:06,588 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 06:32:06,589 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 247 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:06,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 663 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:32:06,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2737 states. [2023-04-01 06:32:06,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2737 to 2731. [2023-04-01 06:32:06,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2724 states have (on average 1.3641703377386196) internal successors, (3716), 2727 states have internal predecessors, (3716), 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 06:32:06,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 3719 transitions. [2023-04-01 06:32:06,813 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 3719 transitions. Word has length 55 [2023-04-01 06:32:06,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:06,813 INFO L495 AbstractCegarLoop]: Abstraction has 2731 states and 3719 transitions. [2023-04-01 06:32:06,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 06:32:06,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 3719 transitions. [2023-04-01 06:32:06,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 06:32:06,815 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:06,815 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 06:32:06,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:32:06,815 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:06,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:06,816 INFO L85 PathProgramCache]: Analyzing trace with hash 902638482, now seen corresponding path program 1 times [2023-04-01 06:32:06,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:06,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489924633] [2023-04-01 06:32:06,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:06,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:06,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:06,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489924633] [2023-04-01 06:32:06,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489924633] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:06,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:06,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 06:32:06,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511392941] [2023-04-01 06:32:06,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:06,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 06:32:06,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:06,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 06:32:06,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:32:06,968 INFO L87 Difference]: Start difference. First operand 2731 states and 3719 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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 06:32:08,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:08,001 INFO L93 Difference]: Finished difference Result 9436 states and 13006 transitions. [2023-04-01 06:32:08,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 06:32:08,001 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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 06:32:08,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:08,027 INFO L225 Difference]: With dead ends: 9436 [2023-04-01 06:32:08,027 INFO L226 Difference]: Without dead ends: 8341 [2023-04-01 06:32:08,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-01 06:32:08,031 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 2277 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2277 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:08,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2277 Valid, 515 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:32:08,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8341 states. [2023-04-01 06:32:08,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8341 to 2745. [2023-04-01 06:32:08,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2745 states, 2738 states have (on average 1.3637691745799854) internal successors, (3734), 2741 states have internal predecessors, (3734), 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 06:32:08,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2745 states to 2745 states and 3737 transitions. [2023-04-01 06:32:08,379 INFO L78 Accepts]: Start accepts. Automaton has 2745 states and 3737 transitions. Word has length 56 [2023-04-01 06:32:08,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:08,380 INFO L495 AbstractCegarLoop]: Abstraction has 2745 states and 3737 transitions. [2023-04-01 06:32:08,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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 06:32:08,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2745 states and 3737 transitions. [2023-04-01 06:32:08,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 06:32:08,381 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:08,381 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 06:32:08,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:32:08,382 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:08,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:08,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1067316345, now seen corresponding path program 1 times [2023-04-01 06:32:08,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:08,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219607251] [2023-04-01 06:32:08,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:08,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:08,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:08,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219607251] [2023-04-01 06:32:08,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219607251] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:08,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:08,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 06:32:08,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841132369] [2023-04-01 06:32:08,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:08,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 06:32:08,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:08,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 06:32:08,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:32:08,480 INFO L87 Difference]: Start difference. First operand 2745 states and 3737 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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 06:32:10,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:10,060 INFO L93 Difference]: Finished difference Result 10580 states and 14661 transitions. [2023-04-01 06:32:10,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 06:32:10,061 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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 06:32:10,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:10,087 INFO L225 Difference]: With dead ends: 10580 [2023-04-01 06:32:10,087 INFO L226 Difference]: Without dead ends: 9640 [2023-04-01 06:32:10,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-01 06:32:10,092 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 1768 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1768 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:10,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1768 Valid, 607 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:32:10,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9640 states. [2023-04-01 06:32:10,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9640 to 2767. [2023-04-01 06:32:10,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2767 states, 2760 states have (on average 1.3641304347826086) internal successors, (3765), 2763 states have internal predecessors, (3765), 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 06:32:10,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2767 states to 2767 states and 3768 transitions. [2023-04-01 06:32:10,460 INFO L78 Accepts]: Start accepts. Automaton has 2767 states and 3768 transitions. Word has length 56 [2023-04-01 06:32:10,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:10,461 INFO L495 AbstractCegarLoop]: Abstraction has 2767 states and 3768 transitions. [2023-04-01 06:32:10,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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 06:32:10,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2767 states and 3768 transitions. [2023-04-01 06:32:10,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 06:32:10,462 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:10,462 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 06:32:10,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:32:10,463 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:10,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:10,463 INFO L85 PathProgramCache]: Analyzing trace with hash -269158967, now seen corresponding path program 1 times [2023-04-01 06:32:10,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:10,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250439843] [2023-04-01 06:32:10,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:10,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:10,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:10,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250439843] [2023-04-01 06:32:10,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250439843] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:10,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:10,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 06:32:10,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099240470] [2023-04-01 06:32:10,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:10,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 06:32:10,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:10,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 06:32:10,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:32:10,556 INFO L87 Difference]: Start difference. First operand 2767 states and 3768 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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 06:32:12,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:12,697 INFO L93 Difference]: Finished difference Result 12559 states and 17427 transitions. [2023-04-01 06:32:12,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 06:32:12,697 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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 06:32:12,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:12,717 INFO L225 Difference]: With dead ends: 12559 [2023-04-01 06:32:12,717 INFO L226 Difference]: Without dead ends: 11505 [2023-04-01 06:32:12,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-01 06:32:12,722 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 2593 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2593 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:12,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2593 Valid, 547 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:32:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11505 states. [2023-04-01 06:32:13,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11505 to 2801. [2023-04-01 06:32:13,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2801 states, 2794 states have (on average 1.363278453829635) internal successors, (3809), 2797 states have internal predecessors, (3809), 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 06:32:13,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2801 states to 2801 states and 3812 transitions. [2023-04-01 06:32:13,180 INFO L78 Accepts]: Start accepts. Automaton has 2801 states and 3812 transitions. Word has length 56 [2023-04-01 06:32:13,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:13,180 INFO L495 AbstractCegarLoop]: Abstraction has 2801 states and 3812 transitions. [2023-04-01 06:32:13,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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 06:32:13,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2801 states and 3812 transitions. [2023-04-01 06:32:13,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 06:32:13,182 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:13,182 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 06:32:13,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 06:32:13,182 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:13,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:13,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1744464723, now seen corresponding path program 1 times [2023-04-01 06:32:13,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:13,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463744334] [2023-04-01 06:32:13,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:13,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:13,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:13,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:13,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463744334] [2023-04-01 06:32:13,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463744334] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:13,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:13,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 06:32:13,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207445939] [2023-04-01 06:32:13,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:13,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 06:32:13,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:13,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 06:32:13,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 06:32:13,412 INFO L87 Difference]: Start difference. First operand 2801 states and 3812 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 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 06:32:14,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:14,741 INFO L93 Difference]: Finished difference Result 6809 states and 9390 transitions. [2023-04-01 06:32:14,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 06:32:14,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 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 57 [2023-04-01 06:32:14,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:14,748 INFO L225 Difference]: With dead ends: 6809 [2023-04-01 06:32:14,748 INFO L226 Difference]: Without dead ends: 4777 [2023-04-01 06:32:14,751 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 06:32:14,752 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 1928 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1928 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:14,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1928 Valid, 732 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 06:32:14,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2023-04-01 06:32:15,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 2723. [2023-04-01 06:32:15,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2723 states, 2716 states have (on average 1.3619293078055965) internal successors, (3699), 2719 states have internal predecessors, (3699), 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 06:32:15,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2723 states to 2723 states and 3702 transitions. [2023-04-01 06:32:15,210 INFO L78 Accepts]: Start accepts. Automaton has 2723 states and 3702 transitions. Word has length 57 [2023-04-01 06:32:15,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:15,210 INFO L495 AbstractCegarLoop]: Abstraction has 2723 states and 3702 transitions. [2023-04-01 06:32:15,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 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 06:32:15,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2723 states and 3702 transitions. [2023-04-01 06:32:15,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 06:32:15,212 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:15,212 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 06:32:15,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 06:32:15,213 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:15,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:15,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1364336384, now seen corresponding path program 1 times [2023-04-01 06:32:15,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:15,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996540602] [2023-04-01 06:32:15,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:15,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:15,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:15,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996540602] [2023-04-01 06:32:15,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996540602] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:15,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:15,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 06:32:15,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742527453] [2023-04-01 06:32:15,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:15,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 06:32:15,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:15,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 06:32:15,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:32:15,413 INFO L87 Difference]: Start difference. First operand 2723 states and 3702 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 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 06:32:18,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:18,072 INFO L93 Difference]: Finished difference Result 11125 states and 15357 transitions. [2023-04-01 06:32:18,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 06:32:18,073 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 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 57 [2023-04-01 06:32:18,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:18,088 INFO L225 Difference]: With dead ends: 11125 [2023-04-01 06:32:18,088 INFO L226 Difference]: Without dead ends: 9223 [2023-04-01 06:32:18,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2023-04-01 06:32:18,092 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 1436 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1436 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:18,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1436 Valid, 1451 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 06:32:18,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9223 states. [2023-04-01 06:32:18,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9223 to 2694. [2023-04-01 06:32:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2694 states, 2687 states have (on average 1.3613695571269073) internal successors, (3658), 2690 states have internal predecessors, (3658), 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 06:32:18,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2694 states to 2694 states and 3661 transitions. [2023-04-01 06:32:18,651 INFO L78 Accepts]: Start accepts. Automaton has 2694 states and 3661 transitions. Word has length 57 [2023-04-01 06:32:18,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:18,651 INFO L495 AbstractCegarLoop]: Abstraction has 2694 states and 3661 transitions. [2023-04-01 06:32:18,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 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 06:32:18,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2694 states and 3661 transitions. [2023-04-01 06:32:18,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 06:32:18,653 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:18,653 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 06:32:18,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 06:32:18,653 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:18,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:18,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1876570328, now seen corresponding path program 1 times [2023-04-01 06:32:18,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:18,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353171797] [2023-04-01 06:32:18,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:18,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:18,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:18,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:18,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353171797] [2023-04-01 06:32:18,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353171797] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:18,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:18,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 06:32:18,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46764307] [2023-04-01 06:32:18,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:18,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 06:32:18,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:18,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 06:32:18,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:32:18,871 INFO L87 Difference]: Start difference. First operand 2694 states and 3661 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 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 06:32:20,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:20,713 INFO L93 Difference]: Finished difference Result 5756 states and 7851 transitions. [2023-04-01 06:32:20,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:32:20,714 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 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 57 [2023-04-01 06:32:20,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:20,722 INFO L225 Difference]: With dead ends: 5756 [2023-04-01 06:32:20,723 INFO L226 Difference]: Without dead ends: 5751 [2023-04-01 06:32:20,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-04-01 06:32:20,724 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 1788 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1788 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:20,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1788 Valid, 1069 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 06:32:20,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5751 states. [2023-04-01 06:32:21,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5751 to 2694. [2023-04-01 06:32:21,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2694 states, 2687 states have (on average 1.3606252326014143) internal successors, (3656), 2690 states have internal predecessors, (3656), 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 06:32:21,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2694 states to 2694 states and 3659 transitions. [2023-04-01 06:32:21,305 INFO L78 Accepts]: Start accepts. Automaton has 2694 states and 3659 transitions. Word has length 57 [2023-04-01 06:32:21,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:21,306 INFO L495 AbstractCegarLoop]: Abstraction has 2694 states and 3659 transitions. [2023-04-01 06:32:21,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 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 06:32:21,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2694 states and 3659 transitions. [2023-04-01 06:32:21,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 06:32:21,307 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:21,307 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 06:32:21,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 06:32:21,308 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:21,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:21,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1385910251, now seen corresponding path program 1 times [2023-04-01 06:32:21,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:21,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342822936] [2023-04-01 06:32:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:21,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:21,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:21,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342822936] [2023-04-01 06:32:21,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342822936] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:21,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:21,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:32:21,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874137810] [2023-04-01 06:32:21,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:21,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:32:21,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:21,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:32:21,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:32:21,351 INFO L87 Difference]: Start difference. First operand 2694 states and 3659 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 06:32:21,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:21,959 INFO L93 Difference]: Finished difference Result 3713 states and 5069 transitions. [2023-04-01 06:32:21,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:32:21,960 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 06:32:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:21,963 INFO L225 Difference]: With dead ends: 3713 [2023-04-01 06:32:21,964 INFO L226 Difference]: Without dead ends: 2701 [2023-04-01 06:32:21,965 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 06:32:21,966 INFO L413 NwaCegarLoop]: 416 mSDtfsCounter, 179 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:21,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 670 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:32:21,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2023-04-01 06:32:22,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2694. [2023-04-01 06:32:22,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2694 states, 2687 states have (on average 1.3442500930405656) internal successors, (3612), 2690 states have internal predecessors, (3612), 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 06:32:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2694 states to 2694 states and 3615 transitions. [2023-04-01 06:32:22,546 INFO L78 Accepts]: Start accepts. Automaton has 2694 states and 3615 transitions. Word has length 58 [2023-04-01 06:32:22,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:22,546 INFO L495 AbstractCegarLoop]: Abstraction has 2694 states and 3615 transitions. [2023-04-01 06:32:22,546 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 06:32:22,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2694 states and 3615 transitions. [2023-04-01 06:32:22,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 06:32:22,548 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:22,548 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 06:32:22,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 06:32:22,548 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:22,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:22,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1495666947, now seen corresponding path program 1 times [2023-04-01 06:32:22,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:22,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117298392] [2023-04-01 06:32:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:22,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:22,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:22,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117298392] [2023-04-01 06:32:22,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117298392] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:22,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:22,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:32:22,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601716828] [2023-04-01 06:32:22,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:22,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:32:22,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:22,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:32:22,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:32:22,590 INFO L87 Difference]: Start difference. First operand 2694 states and 3615 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 06:32:23,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:23,213 INFO L93 Difference]: Finished difference Result 3764 states and 5075 transitions. [2023-04-01 06:32:23,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:32:23,214 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 06:32:23,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:23,217 INFO L225 Difference]: With dead ends: 3764 [2023-04-01 06:32:23,217 INFO L226 Difference]: Without dead ends: 2700 [2023-04-01 06:32:23,219 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 06:32:23,219 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 195 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:23,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 676 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:32:23,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2023-04-01 06:32:23,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 2694. [2023-04-01 06:32:23,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2694 states, 2687 states have (on average 1.3286192780052102) internal successors, (3570), 2690 states have internal predecessors, (3570), 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 06:32:23,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2694 states to 2694 states and 3573 transitions. [2023-04-01 06:32:23,836 INFO L78 Accepts]: Start accepts. Automaton has 2694 states and 3573 transitions. Word has length 58 [2023-04-01 06:32:23,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:23,836 INFO L495 AbstractCegarLoop]: Abstraction has 2694 states and 3573 transitions. [2023-04-01 06:32:23,837 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 06:32:23,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2694 states and 3573 transitions. [2023-04-01 06:32:23,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 06:32:23,838 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:23,838 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 06:32:23,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 06:32:23,839 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:23,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:23,839 INFO L85 PathProgramCache]: Analyzing trace with hash 958916556, now seen corresponding path program 1 times [2023-04-01 06:32:23,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:23,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908533267] [2023-04-01 06:32:23,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:23,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:23,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:23,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908533267] [2023-04-01 06:32:23,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908533267] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:23,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:23,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:32:23,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325605301] [2023-04-01 06:32:23,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:23,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:32:23,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:23,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:32:23,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:32:23,887 INFO L87 Difference]: Start difference. First operand 2694 states and 3573 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 06:32:24,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:24,505 INFO L93 Difference]: Finished difference Result 3843 states and 5126 transitions. [2023-04-01 06:32:24,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:32:24,505 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 06:32:24,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:24,508 INFO L225 Difference]: With dead ends: 3843 [2023-04-01 06:32:24,508 INFO L226 Difference]: Without dead ends: 2685 [2023-04-01 06:32:24,514 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 06:32:24,515 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 215 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:24,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 698 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:32:24,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2023-04-01 06:32:25,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 2679. [2023-04-01 06:32:25,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2679 states, 2672 states have (on average 1.310254491017964) internal successors, (3501), 2675 states have internal predecessors, (3501), 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 06:32:25,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2679 states to 2679 states and 3504 transitions. [2023-04-01 06:32:25,128 INFO L78 Accepts]: Start accepts. Automaton has 2679 states and 3504 transitions. Word has length 58 [2023-04-01 06:32:25,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:25,128 INFO L495 AbstractCegarLoop]: Abstraction has 2679 states and 3504 transitions. [2023-04-01 06:32:25,128 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 06:32:25,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2679 states and 3504 transitions. [2023-04-01 06:32:25,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 06:32:25,130 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:25,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:32:25,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 06:32:25,131 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:25,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:25,131 INFO L85 PathProgramCache]: Analyzing trace with hash -172349180, now seen corresponding path program 1 times [2023-04-01 06:32:25,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:25,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656366278] [2023-04-01 06:32:25,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:25,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:25,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:25,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656366278] [2023-04-01 06:32:25,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656366278] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:25,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:25,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:32:25,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586091276] [2023-04-01 06:32:25,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:25,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:32:25,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:25,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:32:25,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:32:25,200 INFO L87 Difference]: Start difference. First operand 2679 states and 3504 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 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 06:32:25,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:25,963 INFO L93 Difference]: Finished difference Result 4405 states and 5799 transitions. [2023-04-01 06:32:25,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:32:25,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 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 06:32:25,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:25,966 INFO L225 Difference]: With dead ends: 4405 [2023-04-01 06:32:25,967 INFO L226 Difference]: Without dead ends: 3104 [2023-04-01 06:32:25,968 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 06:32:25,969 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 304 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:25,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 499 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:32:25,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2023-04-01 06:32:26,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 2469. [2023-04-01 06:32:26,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2462 states have (on average 1.309098294069862) internal successors, (3223), 2465 states have internal predecessors, (3223), 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 06:32:26,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 3226 transitions. [2023-04-01 06:32:26,562 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 3226 transitions. Word has length 59 [2023-04-01 06:32:26,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:26,562 INFO L495 AbstractCegarLoop]: Abstraction has 2469 states and 3226 transitions. [2023-04-01 06:32:26,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 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 06:32:26,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 3226 transitions. [2023-04-01 06:32:26,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 06:32:26,564 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:26,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:32:26,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 06:32:26,564 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:26,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:26,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1005451477, now seen corresponding path program 1 times [2023-04-01 06:32:26,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:26,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22633020] [2023-04-01 06:32:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:26,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:27,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:27,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22633020] [2023-04-01 06:32:27,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22633020] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:27,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:27,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 06:32:27,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414830995] [2023-04-01 06:32:27,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:27,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 06:32:27,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:27,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 06:32:27,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-01 06:32:27,113 INFO L87 Difference]: Start difference. First operand 2469 states and 3226 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 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 06:32:28,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:28,860 INFO L93 Difference]: Finished difference Result 3875 states and 5079 transitions. [2023-04-01 06:32:28,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 06:32:28,860 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 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 06:32:28,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:28,864 INFO L225 Difference]: With dead ends: 3875 [2023-04-01 06:32:28,865 INFO L226 Difference]: Without dead ends: 3871 [2023-04-01 06:32:28,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-04-01 06:32:28,866 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 2001 mSDsluCounter, 1972 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2001 SdHoareTripleChecker+Valid, 2447 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:28,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2001 Valid, 2447 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 06:32:28,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2023-04-01 06:32:29,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 2465. [2023-04-01 06:32:29,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2465 states, 2459 states have (on average 1.3090687271248476) internal successors, (3219), 2461 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 06:32:29,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3222 transitions. [2023-04-01 06:32:29,554 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3222 transitions. Word has length 60 [2023-04-01 06:32:29,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:29,554 INFO L495 AbstractCegarLoop]: Abstraction has 2465 states and 3222 transitions. [2023-04-01 06:32:29,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 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 06:32:29,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3222 transitions. [2023-04-01 06:32:29,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 06:32:29,556 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:29,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:32:29,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 06:32:29,556 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:29,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:29,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1468288075, now seen corresponding path program 1 times [2023-04-01 06:32:29,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:29,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846992282] [2023-04-01 06:32:29,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:29,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:29,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:29,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846992282] [2023-04-01 06:32:29,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846992282] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:29,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:29,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 06:32:29,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852158133] [2023-04-01 06:32:29,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:29,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 06:32:29,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:29,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 06:32:29,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-01 06:32:29,919 INFO L87 Difference]: Start difference. First operand 2465 states and 3222 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 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 06:32:31,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:31,869 INFO L93 Difference]: Finished difference Result 4630 states and 6072 transitions. [2023-04-01 06:32:31,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 06:32:31,869 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 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 06:32:31,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:31,873 INFO L225 Difference]: With dead ends: 4630 [2023-04-01 06:32:31,874 INFO L226 Difference]: Without dead ends: 4132 [2023-04-01 06:32:31,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2023-04-01 06:32:31,875 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 2086 mSDsluCounter, 1352 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2086 SdHoareTripleChecker+Valid, 1838 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:31,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2086 Valid, 1838 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:32:31,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4132 states. [2023-04-01 06:32:32,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4132 to 2407. [2023-04-01 06:32:32,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2407 states, 2402 states have (on average 1.310158201498751) internal successors, (3147), 2403 states have internal predecessors, (3147), 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 06:32:32,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 3150 transitions. [2023-04-01 06:32:32,663 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 3150 transitions. Word has length 60 [2023-04-01 06:32:32,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:32,663 INFO L495 AbstractCegarLoop]: Abstraction has 2407 states and 3150 transitions. [2023-04-01 06:32:32,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 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 06:32:32,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 3150 transitions. [2023-04-01 06:32:32,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 06:32:32,665 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:32,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:32:32,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-01 06:32:32,665 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:32,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:32,666 INFO L85 PathProgramCache]: Analyzing trace with hash -2011747672, now seen corresponding path program 1 times [2023-04-01 06:32:32,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:32,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567259238] [2023-04-01 06:32:32,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:32,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:32,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:32,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567259238] [2023-04-01 06:32:32,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567259238] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:32,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:32,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:32:32,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341527671] [2023-04-01 06:32:32,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:32,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:32:32,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:32,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:32:32,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:32:32,721 INFO L87 Difference]: Start difference. First operand 2407 states and 3150 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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 06:32:33,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:33,721 INFO L93 Difference]: Finished difference Result 4012 states and 5273 transitions. [2023-04-01 06:32:33,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:32:33,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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 06:32:33,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:33,724 INFO L225 Difference]: With dead ends: 4012 [2023-04-01 06:32:33,724 INFO L226 Difference]: Without dead ends: 2759 [2023-04-01 06:32:33,727 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 06:32:33,727 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 214 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:33,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 340 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:32:33,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2023-04-01 06:32:34,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 2252. [2023-04-01 06:32:34,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 2248 states have (on average 1.3100533807829182) internal successors, (2945), 2248 states have internal predecessors, (2945), 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 06:32:34,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 2948 transitions. [2023-04-01 06:32:34,501 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 2948 transitions. Word has length 60 [2023-04-01 06:32:34,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:34,501 INFO L495 AbstractCegarLoop]: Abstraction has 2252 states and 2948 transitions. [2023-04-01 06:32:34,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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 06:32:34,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 2948 transitions. [2023-04-01 06:32:34,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 06:32:34,502 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:34,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:32:34,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-01 06:32:34,503 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:34,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:34,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1303709293, now seen corresponding path program 1 times [2023-04-01 06:32:34,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:34,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788474083] [2023-04-01 06:32:34,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:34,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:34,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:34,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788474083] [2023-04-01 06:32:34,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788474083] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:34,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:34,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:32:34,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730691720] [2023-04-01 06:32:34,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:34,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:32:34,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:34,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:32:34,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:32:34,615 INFO L87 Difference]: Start difference. First operand 2252 states and 2948 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 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 06:32:35,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:35,392 INFO L93 Difference]: Finished difference Result 2258 states and 2951 transitions. [2023-04-01 06:32:35,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:32:35,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 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 06:32:35,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:35,395 INFO L225 Difference]: With dead ends: 2258 [2023-04-01 06:32:35,395 INFO L226 Difference]: Without dead ends: 1931 [2023-04-01 06:32:35,395 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 06:32:35,396 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 439 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:35,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 664 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:32:35,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2023-04-01 06:32:36,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1927. [2023-04-01 06:32:36,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1923 states have (on average 1.3078523140925638) internal successors, (2515), 1923 states have internal predecessors, (2515), 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 06:32:36,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 2518 transitions. [2023-04-01 06:32:36,100 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 2518 transitions. Word has length 60 [2023-04-01 06:32:36,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:36,100 INFO L495 AbstractCegarLoop]: Abstraction has 1927 states and 2518 transitions. [2023-04-01 06:32:36,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 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 06:32:36,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 2518 transitions. [2023-04-01 06:32:36,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-01 06:32:36,101 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:36,101 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] [2023-04-01 06:32:36,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-01 06:32:36,101 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:36,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:36,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1142270639, now seen corresponding path program 1 times [2023-04-01 06:32:36,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:36,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130846509] [2023-04-01 06:32:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:36,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:36,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:36,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130846509] [2023-04-01 06:32:36,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130846509] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:36,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:36,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:32:36,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478267570] [2023-04-01 06:32:36,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:36,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:32:36,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:36,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:32:36,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:32:36,183 INFO L87 Difference]: Start difference. First operand 1927 states and 2518 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 06:32:37,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:37,260 INFO L93 Difference]: Finished difference Result 3699 states and 4928 transitions. [2023-04-01 06:32:37,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:32:37,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 61 [2023-04-01 06:32:37,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:37,263 INFO L225 Difference]: With dead ends: 3699 [2023-04-01 06:32:37,264 INFO L226 Difference]: Without dead ends: 2681 [2023-04-01 06:32:37,265 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 06:32:37,266 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 112 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:37,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 468 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:32:37,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2023-04-01 06:32:38,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2487. [2023-04-01 06:32:38,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2483 states have (on average 1.3044703987112365) internal successors, (3239), 2483 states have internal predecessors, (3239), 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 06:32:38,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3242 transitions. [2023-04-01 06:32:38,212 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3242 transitions. Word has length 61 [2023-04-01 06:32:38,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:38,212 INFO L495 AbstractCegarLoop]: Abstraction has 2487 states and 3242 transitions. [2023-04-01 06:32:38,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 06:32:38,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3242 transitions. [2023-04-01 06:32:38,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-01 06:32:38,213 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:38,214 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 06:32:38,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-01 06:32:38,214 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:38,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:38,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1156671925, now seen corresponding path program 1 times [2023-04-01 06:32:38,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:38,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520255922] [2023-04-01 06:32:38,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:38,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:38,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:38,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520255922] [2023-04-01 06:32:38,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520255922] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:38,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:38,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:32:38,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732810852] [2023-04-01 06:32:38,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:38,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:32:38,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:38,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:32:38,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:32:38,290 INFO L87 Difference]: Start difference. First operand 2487 states and 3242 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) [2023-04-01 06:32:39,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:39,751 INFO L93 Difference]: Finished difference Result 5053 states and 6708 transitions. [2023-04-01 06:32:39,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:32:39,751 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 64 [2023-04-01 06:32:39,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:39,755 INFO L225 Difference]: With dead ends: 5053 [2023-04-01 06:32:39,755 INFO L226 Difference]: Without dead ends: 3615 [2023-04-01 06:32:39,757 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 06:32:39,757 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 100 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:39,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 456 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:32:39,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2023-04-01 06:32:41,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 3241. [2023-04-01 06:32:41,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3241 states, 3237 states have (on average 1.3005869632375657) internal successors, (4210), 3237 states have internal predecessors, (4210), 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 06:32:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3241 states to 3241 states and 4213 transitions. [2023-04-01 06:32:41,058 INFO L78 Accepts]: Start accepts. Automaton has 3241 states and 4213 transitions. Word has length 64 [2023-04-01 06:32:41,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:41,058 INFO L495 AbstractCegarLoop]: Abstraction has 3241 states and 4213 transitions. [2023-04-01 06:32:41,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-04-01 06:32:41,059 INFO L276 IsEmpty]: Start isEmpty. Operand 3241 states and 4213 transitions. [2023-04-01 06:32:41,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 06:32:41,059 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:41,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:32:41,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-01 06:32:41,060 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:41,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:41,060 INFO L85 PathProgramCache]: Analyzing trace with hash 138133649, now seen corresponding path program 1 times [2023-04-01 06:32:41,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:41,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601777142] [2023-04-01 06:32:41,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:41,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:41,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:41,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601777142] [2023-04-01 06:32:41,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601777142] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:41,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:41,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:32:41,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336023257] [2023-04-01 06:32:41,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:41,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:32:41,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:41,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:32:41,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:32:41,137 INFO L87 Difference]: Start difference. First operand 3241 states and 4213 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 06:32:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:43,225 INFO L93 Difference]: Finished difference Result 6803 states and 8986 transitions. [2023-04-01 06:32:43,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:32:43,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 68 [2023-04-01 06:32:43,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:43,230 INFO L225 Difference]: With dead ends: 6803 [2023-04-01 06:32:43,230 INFO L226 Difference]: Without dead ends: 4875 [2023-04-01 06:32:43,232 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 06:32:43,232 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 78 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:43,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 446 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:32:43,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2023-04-01 06:32:45,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 4377. [2023-04-01 06:32:45,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4377 states, 4373 states have (on average 1.2949919963411844) internal successors, (5663), 4373 states have internal predecessors, (5663), 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 06:32:45,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4377 states to 4377 states and 5666 transitions. [2023-04-01 06:32:45,024 INFO L78 Accepts]: Start accepts. Automaton has 4377 states and 5666 transitions. Word has length 68 [2023-04-01 06:32:45,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:45,024 INFO L495 AbstractCegarLoop]: Abstraction has 4377 states and 5666 transitions. [2023-04-01 06:32:45,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 06:32:45,024 INFO L276 IsEmpty]: Start isEmpty. Operand 4377 states and 5666 transitions. [2023-04-01 06:32:45,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 06:32:45,026 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:45,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:32:45,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-01 06:32:45,026 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:45,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:45,026 INFO L85 PathProgramCache]: Analyzing trace with hash -663652980, now seen corresponding path program 1 times [2023-04-01 06:32:45,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:45,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825472583] [2023-04-01 06:32:45,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:45,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:45,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:45,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825472583] [2023-04-01 06:32:45,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825472583] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:45,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:45,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 06:32:45,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960544791] [2023-04-01 06:32:45,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:45,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 06:32:45,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:45,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 06:32:45,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:32:45,293 INFO L87 Difference]: Start difference. First operand 4377 states and 5666 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 06:32:48,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:48,936 INFO L93 Difference]: Finished difference Result 7759 states and 10034 transitions. [2023-04-01 06:32:48,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 06:32:48,936 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 72 [2023-04-01 06:32:48,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:48,944 INFO L225 Difference]: With dead ends: 7759 [2023-04-01 06:32:48,944 INFO L226 Difference]: Without dead ends: 7757 [2023-04-01 06:32:48,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2023-04-01 06:32:48,945 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 1169 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:48,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1169 Valid, 1751 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:32:48,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7757 states. [2023-04-01 06:32:51,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7757 to 5083. [2023-04-01 06:32:51,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5083 states, 5079 states have (on average 1.2894270525694034) internal successors, (6549), 5079 states have internal predecessors, (6549), 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 06:32:51,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5083 states to 5083 states and 6552 transitions. [2023-04-01 06:32:51,211 INFO L78 Accepts]: Start accepts. Automaton has 5083 states and 6552 transitions. Word has length 72 [2023-04-01 06:32:51,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:32:51,211 INFO L495 AbstractCegarLoop]: Abstraction has 5083 states and 6552 transitions. [2023-04-01 06:32:51,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 06:32:51,211 INFO L276 IsEmpty]: Start isEmpty. Operand 5083 states and 6552 transitions. [2023-04-01 06:32:51,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 06:32:51,213 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:32:51,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:32:51,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-04-01 06:32:51,214 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:32:51,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:32:51,214 INFO L85 PathProgramCache]: Analyzing trace with hash -2118933227, now seen corresponding path program 1 times [2023-04-01 06:32:51,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:32:51,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092790440] [2023-04-01 06:32:51,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:32:51,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:32:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:32:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:32:51,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:32:51,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092790440] [2023-04-01 06:32:51,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092790440] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:32:51,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:32:51,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 06:32:51,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086385852] [2023-04-01 06:32:51,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:32:51,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 06:32:51,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:32:51,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 06:32:51,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:32:51,312 INFO L87 Difference]: Start difference. First operand 5083 states and 6552 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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 06:32:58,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:32:58,245 INFO L93 Difference]: Finished difference Result 15640 states and 20243 transitions. [2023-04-01 06:32:58,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 06:32:58,246 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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 75 [2023-04-01 06:32:58,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:32:58,262 INFO L225 Difference]: With dead ends: 15640 [2023-04-01 06:32:58,262 INFO L226 Difference]: Without dead ends: 14146 [2023-04-01 06:32:58,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-01 06:32:58,265 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 1814 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1814 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:32:58,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1814 Valid, 436 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:32:58,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14146 states. [2023-04-01 06:33:00,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14146 to 5128. [2023-04-01 06:33:00,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5128 states, 5124 states have (on average 1.2882513661202186) internal successors, (6601), 5124 states have internal predecessors, (6601), 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 06:33:00,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5128 states to 5128 states and 6604 transitions. [2023-04-01 06:33:00,718 INFO L78 Accepts]: Start accepts. Automaton has 5128 states and 6604 transitions. Word has length 75 [2023-04-01 06:33:00,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:33:00,718 INFO L495 AbstractCegarLoop]: Abstraction has 5128 states and 6604 transitions. [2023-04-01 06:33:00,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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 06:33:00,718 INFO L276 IsEmpty]: Start isEmpty. Operand 5128 states and 6604 transitions. [2023-04-01 06:33:00,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 06:33:00,720 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:33:00,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:33:00,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-04-01 06:33:00,720 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:33:00,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:33:00,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1840913873, now seen corresponding path program 1 times [2023-04-01 06:33:00,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:33:00,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647738309] [2023-04-01 06:33:00,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:33:00,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:33:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:33:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:33:00,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:33:00,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647738309] [2023-04-01 06:33:00,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647738309] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:33:00,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:33:00,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 06:33:00,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298500863] [2023-04-01 06:33:00,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:33:00,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 06:33:00,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:33:00,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 06:33:00,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:33:00,959 INFO L87 Difference]: Start difference. First operand 5128 states and 6604 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 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 06:33:04,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:33:04,755 INFO L93 Difference]: Finished difference Result 7622 states and 9860 transitions. [2023-04-01 06:33:04,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 06:33:04,756 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 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 77 [2023-04-01 06:33:04,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:33:04,764 INFO L225 Difference]: With dead ends: 7622 [2023-04-01 06:33:04,764 INFO L226 Difference]: Without dead ends: 7620 [2023-04-01 06:33:04,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-04-01 06:33:04,765 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 892 mSDsluCounter, 1217 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 1553 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:33:04,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [892 Valid, 1553 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:33:04,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7620 states.