/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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:56:15,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:56:15,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:56:15,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:56:15,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:56:15,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:56:15,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:56:15,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:56:15,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:56:15,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:56:15,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:56:15,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:56:15,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:56:15,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:56:15,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:56:15,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:56:15,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:56:15,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:56:15,183 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:56:15,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:56:15,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:56:15,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:56:15,191 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:56:15,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:56:15,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:56:15,201 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:56:15,202 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:56:15,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:56:15,203 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:56:15,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:56:15,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:56:15,204 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:56:15,204 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:56:15,205 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:56:15,206 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:56:15,206 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:56:15,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:56:15,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:56:15,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:56:15,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:56:15,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:56:15,212 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:56:15,238 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:56:15,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:56:15,238 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:56:15,239 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:56:15,239 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:56:15,239 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:56:15,239 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:56:15,239 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:56:15,239 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:56:15,240 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:56:15,240 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:56:15,240 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:56:15,240 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:56:15,240 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:56:15,240 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:56:15,240 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:56:15,240 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:56:15,240 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:56:15,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:56:15,241 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:56:15,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:56:15,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:56:15,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:56:15,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:56:15,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:56:15,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:56:15,242 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:56:15,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:56:15,242 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:56:15,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:56:15,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:56:15,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:56:15,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:56:15,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:56:15,243 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:56:15,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:56:15,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:56:15,243 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:56:15,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:56:15,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:56:15,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:56:15,244 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:56:15,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:56:15,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:56:15,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:56:15,524 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:56:15,525 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:56:15,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-04-03 02:56:16,645 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:56:16,925 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:56:16,926 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-04-03 02:56:16,943 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d19e47557/10c487eeab344df99c39d3e8d194acdf/FLAG8d2214df7 [2023-04-03 02:56:16,959 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d19e47557/10c487eeab344df99c39d3e8d194acdf [2023-04-03 02:56:16,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:56:16,964 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:56:16,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:56:16,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:56:16,970 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:56:16,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:56:16" (1/1) ... [2023-04-03 02:56:16,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b954c5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:16, skipping insertion in model container [2023-04-03 02:56:16,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:56:16" (1/1) ... [2023-04-03 02:56:16,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:56:17,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:56:17,190 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[7119,7132] [2023-04-03 02:56:17,206 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[9806,9819] [2023-04-03 02:56:17,212 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[10897,10910] [2023-04-03 02:56:17,216 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[11503,11516] [2023-04-03 02:56:17,223 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[12922,12935] [2023-04-03 02:56:17,228 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[13528,13541] [2023-04-03 02:56:17,233 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[14457,14470] [2023-04-03 02:56:17,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:56:17,304 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:56:17,338 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[7119,7132] [2023-04-03 02:56:17,346 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[9806,9819] [2023-04-03 02:56:17,351 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[10897,10910] [2023-04-03 02:56:17,354 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[11503,11516] [2023-04-03 02:56:17,360 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[12922,12935] [2023-04-03 02:56:17,363 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[13528,13541] [2023-04-03 02:56:17,367 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[14457,14470] [2023-04-03 02:56:17,390 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:56:17,407 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:56:17,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:17 WrapperNode [2023-04-03 02:56:17,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:56:17,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:56:17,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:56:17,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:56:17,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:17" (1/1) ... [2023-04-03 02:56:17,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:17" (1/1) ... [2023-04-03 02:56:17,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:17" (1/1) ... [2023-04-03 02:56:17,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:17" (1/1) ... [2023-04-03 02:56:17,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:17" (1/1) ... [2023-04-03 02:56:17,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:17" (1/1) ... [2023-04-03 02:56:17,490 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:17" (1/1) ... [2023-04-03 02:56:17,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:17" (1/1) ... [2023-04-03 02:56:17,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:56:17,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:56:17,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:56:17,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:56:17,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:17" (1/1) ... [2023-04-03 02:56:17,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:56:17,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:56:17,538 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:56:17,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:56:17,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:56:17,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:56:17,580 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:56:17,580 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:56:17,581 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:56:17,581 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:56:17,581 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:56:17,581 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:56:17,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:56:17,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:56:17,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:56:17,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:56:17,581 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:56:17,581 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:56:17,581 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:56:17,582 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:56:17,582 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:56:17,582 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:56:17,582 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:56:17,582 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:56:17,582 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:56:17,582 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:56:17,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:56:17,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:56:17,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:56:17,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:56:17,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:56:17,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:56:17,748 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:56:17,750 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:56:18,477 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:56:18,542 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:56:18,542 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:56:18,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:56:18 BoogieIcfgContainer [2023-04-03 02:56:18,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:56:18,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:56:18,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:56:18,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:56:18,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:56:16" (1/3) ... [2023-04-03 02:56:18,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bb01efe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:56:18, skipping insertion in model container [2023-04-03 02:56:18,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:17" (2/3) ... [2023-04-03 02:56:18,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bb01efe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:56:18, skipping insertion in model container [2023-04-03 02:56:18,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:56:18" (3/3) ... [2023-04-03 02:56:18,556 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-04-03 02:56:18,572 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:56:18,572 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-04-03 02:56:18,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:56:18,633 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;@759325e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:56:18,633 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-04-03 02:56:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 196 states, 183 states have (on average 1.830601092896175) internal successors, (335), 191 states have internal predecessors, (335), 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) [2023-04-03 02:56:18,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-03 02:56:18,654 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:18,655 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] [2023-04-03 02:56:18,655 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr5ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:18,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:18,661 INFO L85 PathProgramCache]: Analyzing trace with hash -945372379, now seen corresponding path program 1 times [2023-04-03 02:56:18,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:18,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429359789] [2023-04-03 02:56:18,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:18,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:19,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:19,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:19,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429359789] [2023-04-03 02:56:19,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429359789] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:19,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:19,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:56:19,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071017000] [2023-04-03 02:56:19,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:19,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:56:19,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:19,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:56:19,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:56:19,307 INFO L87 Difference]: Start difference. First operand has 196 states, 183 states have (on average 1.830601092896175) internal successors, (335), 191 states have internal predecessors, (335), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 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) [2023-04-03 02:56:19,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:19,590 INFO L93 Difference]: Finished difference Result 317 states and 523 transitions. [2023-04-03 02:56:19,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:56:19,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 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 49 [2023-04-03 02:56:19,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:19,602 INFO L225 Difference]: With dead ends: 317 [2023-04-03 02:56:19,602 INFO L226 Difference]: Without dead ends: 165 [2023-04-03 02:56:19,605 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 [2023-04-03 02:56:19,608 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 765 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:19,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 227 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:56:19,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-04-03 02:56:19,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2023-04-03 02:56:19,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 155 states have (on average 1.238709677419355) internal successors, (192), 161 states have internal predecessors, (192), 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) [2023-04-03 02:56:19,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 195 transitions. [2023-04-03 02:56:19,676 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 195 transitions. Word has length 49 [2023-04-03 02:56:19,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:19,677 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 195 transitions. [2023-04-03 02:56:19,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 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) [2023-04-03 02:56:19,678 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 195 transitions. [2023-04-03 02:56:19,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-03 02:56:19,686 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:19,686 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] [2023-04-03 02:56:19,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:56:19,687 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr5ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:19,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:19,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1730538443, now seen corresponding path program 1 times [2023-04-03 02:56:19,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:19,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716925684] [2023-04-03 02:56:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:19,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:19,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:19,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716925684] [2023-04-03 02:56:19,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716925684] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:19,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:19,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:56:19,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058771682] [2023-04-03 02:56:19,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:19,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:56:19,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:19,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:56:19,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:56:19,896 INFO L87 Difference]: Start difference. First operand 165 states and 195 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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) [2023-04-03 02:56:20,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:20,041 INFO L93 Difference]: Finished difference Result 273 states and 330 transitions. [2023-04-03 02:56:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:56:20,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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 50 [2023-04-03 02:56:20,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:20,046 INFO L225 Difference]: With dead ends: 273 [2023-04-03 02:56:20,046 INFO L226 Difference]: Without dead ends: 155 [2023-04-03 02:56:20,049 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 [2023-04-03 02:56:20,051 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 483 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:20,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 124 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:56:20,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-04-03 02:56:20,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2023-04-03 02:56:20,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 145 states have (on average 1.2344827586206897) internal successors, (179), 151 states have internal predecessors, (179), 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) [2023-04-03 02:56:20,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 182 transitions. [2023-04-03 02:56:20,081 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 182 transitions. Word has length 50 [2023-04-03 02:56:20,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:20,081 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 182 transitions. [2023-04-03 02:56:20,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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) [2023-04-03 02:56:20,082 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 182 transitions. [2023-04-03 02:56:20,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-03 02:56:20,085 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:20,085 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:56:20,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:56:20,086 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr5ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:20,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:20,087 INFO L85 PathProgramCache]: Analyzing trace with hash -61761849, now seen corresponding path program 1 times [2023-04-03 02:56:20,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:20,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526246066] [2023-04-03 02:56:20,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:20,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:20,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:20,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526246066] [2023-04-03 02:56:20,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526246066] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:20,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:20,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:56:20,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241670156] [2023-04-03 02:56:20,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:20,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:56:20,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:20,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:56:20,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:56:20,239 INFO L87 Difference]: Start difference. First operand 155 states and 182 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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) [2023-04-03 02:56:20,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:20,404 INFO L93 Difference]: Finished difference Result 332 states and 401 transitions. [2023-04-03 02:56:20,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:56:20,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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 51 [2023-04-03 02:56:20,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:20,405 INFO L225 Difference]: With dead ends: 332 [2023-04-03 02:56:20,406 INFO L226 Difference]: Without dead ends: 213 [2023-04-03 02:56:20,406 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 [2023-04-03 02:56:20,407 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 587 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:20,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 176 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:56:20,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-04-03 02:56:20,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 189. [2023-04-03 02:56:20,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 179 states have (on average 1.2737430167597765) internal successors, (228), 185 states have internal predecessors, (228), 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) [2023-04-03 02:56:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 231 transitions. [2023-04-03 02:56:20,435 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 231 transitions. Word has length 51 [2023-04-03 02:56:20,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:20,435 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 231 transitions. [2023-04-03 02:56:20,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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) [2023-04-03 02:56:20,435 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 231 transitions. [2023-04-03 02:56:20,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-03 02:56:20,436 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:20,436 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] [2023-04-03 02:56:20,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:56:20,437 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:20,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:20,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1488392595, now seen corresponding path program 1 times [2023-04-03 02:56:20,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:20,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281497354] [2023-04-03 02:56:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:20,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:20,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:20,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281497354] [2023-04-03 02:56:20,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281497354] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:20,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:20,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:56:20,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257436904] [2023-04-03 02:56:20,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:20,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:56:20,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:20,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:56:20,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:56:20,723 INFO L87 Difference]: Start difference. First operand 189 states and 231 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 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) [2023-04-03 02:56:21,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:21,146 INFO L93 Difference]: Finished difference Result 391 states and 489 transitions. [2023-04-03 02:56:21,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:56:21,146 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 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 52 [2023-04-03 02:56:21,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:21,149 INFO L225 Difference]: With dead ends: 391 [2023-04-03 02:56:21,149 INFO L226 Difference]: Without dead ends: 320 [2023-04-03 02:56:21,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:56:21,156 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 493 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:21,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 563 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:56:21,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-04-03 02:56:21,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 189. [2023-04-03 02:56:21,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 179 states have (on average 1.2681564245810055) internal successors, (227), 185 states have internal predecessors, (227), 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) [2023-04-03 02:56:21,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 230 transitions. [2023-04-03 02:56:21,181 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 230 transitions. Word has length 52 [2023-04-03 02:56:21,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:21,181 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 230 transitions. [2023-04-03 02:56:21,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 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) [2023-04-03 02:56:21,182 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 230 transitions. [2023-04-03 02:56:21,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-03 02:56:21,182 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:21,183 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] [2023-04-03 02:56:21,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:56:21,183 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr6ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:21,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:21,184 INFO L85 PathProgramCache]: Analyzing trace with hash -930959795, now seen corresponding path program 1 times [2023-04-03 02:56:21,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:21,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667306820] [2023-04-03 02:56:21,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:21,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:21,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:21,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667306820] [2023-04-03 02:56:21,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667306820] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:21,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:21,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:56:21,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132947855] [2023-04-03 02:56:21,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:21,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:56:21,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:21,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:56:21,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:56:21,529 INFO L87 Difference]: Start difference. First operand 189 states and 230 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 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) [2023-04-03 02:56:21,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:21,999 INFO L93 Difference]: Finished difference Result 414 states and 521 transitions. [2023-04-03 02:56:21,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:56:22,000 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 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 52 [2023-04-03 02:56:22,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:22,002 INFO L225 Difference]: With dead ends: 414 [2023-04-03 02:56:22,002 INFO L226 Difference]: Without dead ends: 409 [2023-04-03 02:56:22,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:56:22,003 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 867 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:22,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 606 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:56:22,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2023-04-03 02:56:22,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 189. [2023-04-03 02:56:22,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 179 states have (on average 1.2625698324022345) internal successors, (226), 185 states have internal predecessors, (226), 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) [2023-04-03 02:56:22,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 229 transitions. [2023-04-03 02:56:22,052 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 229 transitions. Word has length 52 [2023-04-03 02:56:22,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:22,054 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 229 transitions. [2023-04-03 02:56:22,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 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) [2023-04-03 02:56:22,055 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 229 transitions. [2023-04-03 02:56:22,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-03 02:56:22,056 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:22,056 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] [2023-04-03 02:56:22,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:56:22,057 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:22,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:22,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1120334454, now seen corresponding path program 1 times [2023-04-03 02:56:22,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:22,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365477198] [2023-04-03 02:56:22,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:22,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:22,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:22,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365477198] [2023-04-03 02:56:22,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365477198] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:22,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:22,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 02:56:22,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148887068] [2023-04-03 02:56:22,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:22,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 02:56:22,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:22,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 02:56:22,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:56:22,322 INFO L87 Difference]: Start difference. First operand 189 states and 229 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 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) [2023-04-03 02:56:22,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:22,566 INFO L93 Difference]: Finished difference Result 373 states and 456 transitions. [2023-04-03 02:56:22,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-03 02:56:22,567 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 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 52 [2023-04-03 02:56:22,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:22,568 INFO L225 Difference]: With dead ends: 373 [2023-04-03 02:56:22,568 INFO L226 Difference]: Without dead ends: 279 [2023-04-03 02:56:22,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-04-03 02:56:22,570 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 932 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:22,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 278 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:56:22,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-04-03 02:56:22,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 189. [2023-04-03 02:56:22,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 179 states have (on average 1.2569832402234637) internal successors, (225), 185 states have internal predecessors, (225), 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) [2023-04-03 02:56:22,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 228 transitions. [2023-04-03 02:56:22,602 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 228 transitions. Word has length 52 [2023-04-03 02:56:22,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:22,602 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 228 transitions. [2023-04-03 02:56:22,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 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) [2023-04-03 02:56:22,602 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 228 transitions. [2023-04-03 02:56:22,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-03 02:56:22,603 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:22,603 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] [2023-04-03 02:56:22,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:56:22,603 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr5ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:22,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:22,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1340992233, now seen corresponding path program 1 times [2023-04-03 02:56:22,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:22,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881778666] [2023-04-03 02:56:22,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:22,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:23,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:23,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881778666] [2023-04-03 02:56:23,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881778666] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:23,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:23,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:56:23,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184806985] [2023-04-03 02:56:23,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:23,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:56:23,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:23,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:56:23,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:56:23,629 INFO L87 Difference]: Start difference. First operand 189 states and 228 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 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) [2023-04-03 02:56:25,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:25,099 INFO L93 Difference]: Finished difference Result 367 states and 452 transitions. [2023-04-03 02:56:25,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-03 02:56:25,100 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 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 54 [2023-04-03 02:56:25,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:25,102 INFO L225 Difference]: With dead ends: 367 [2023-04-03 02:56:25,102 INFO L226 Difference]: Without dead ends: 309 [2023-04-03 02:56:25,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=258, Invalid=1002, Unknown=0, NotChecked=0, Total=1260 [2023-04-03 02:56:25,103 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 860 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 1893 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:25,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 1893 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 02:56:25,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-04-03 02:56:25,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 195. [2023-04-03 02:56:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 185 states have (on average 1.2594594594594595) internal successors, (233), 191 states have internal predecessors, (233), 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) [2023-04-03 02:56:25,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 236 transitions. [2023-04-03 02:56:25,136 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 236 transitions. Word has length 54 [2023-04-03 02:56:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:25,136 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 236 transitions. [2023-04-03 02:56:25,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 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) [2023-04-03 02:56:25,136 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 236 transitions. [2023-04-03 02:56:25,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-03 02:56:25,137 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:25,137 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] [2023-04-03 02:56:25,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:56:25,137 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:25,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:25,138 INFO L85 PathProgramCache]: Analyzing trace with hash -942749334, now seen corresponding path program 1 times [2023-04-03 02:56:25,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:25,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788493736] [2023-04-03 02:56:25,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:25,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:25,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:25,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788493736] [2023-04-03 02:56:25,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788493736] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:25,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:25,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-03 02:56:25,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625722094] [2023-04-03 02:56:25,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:25,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-03 02:56:25,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:25,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-03 02:56:25,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-03 02:56:25,565 INFO L87 Difference]: Start difference. First operand 195 states and 236 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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) [2023-04-03 02:56:26,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:26,047 INFO L93 Difference]: Finished difference Result 411 states and 510 transitions. [2023-04-03 02:56:26,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-03 02:56:26,047 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 54 [2023-04-03 02:56:26,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:26,049 INFO L225 Difference]: With dead ends: 411 [2023-04-03 02:56:26,049 INFO L226 Difference]: Without dead ends: 318 [2023-04-03 02:56:26,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:56:26,050 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 893 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:26,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [893 Valid, 622 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:56:26,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-04-03 02:56:26,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 156. [2023-04-03 02:56:26,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 149 states have (on average 1.2483221476510067) internal successors, (186), 152 states have internal predecessors, (186), 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) [2023-04-03 02:56:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 189 transitions. [2023-04-03 02:56:26,086 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 189 transitions. Word has length 54 [2023-04-03 02:56:26,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:26,087 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 189 transitions. [2023-04-03 02:56:26,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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) [2023-04-03 02:56:26,087 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 189 transitions. [2023-04-03 02:56:26,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-03 02:56:26,087 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:26,087 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] [2023-04-03 02:56:26,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:56:26,088 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:26,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:26,088 INFO L85 PathProgramCache]: Analyzing trace with hash 736787979, now seen corresponding path program 1 times [2023-04-03 02:56:26,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:26,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361572704] [2023-04-03 02:56:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:26,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:26,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:26,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361572704] [2023-04-03 02:56:26,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361572704] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:26,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:26,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-03 02:56:26,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903491481] [2023-04-03 02:56:26,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:26,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-03 02:56:26,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:26,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-03 02:56:26,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-03 02:56:26,589 INFO L87 Difference]: Start difference. First operand 156 states and 189 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 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) [2023-04-03 02:56:27,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:27,142 INFO L93 Difference]: Finished difference Result 250 states and 307 transitions. [2023-04-03 02:56:27,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-03 02:56:27,144 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 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 54 [2023-04-03 02:56:27,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:27,145 INFO L225 Difference]: With dead ends: 250 [2023-04-03 02:56:27,145 INFO L226 Difference]: Without dead ends: 246 [2023-04-03 02:56:27,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:56:27,147 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 624 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:27,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 749 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:56:27,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-04-03 02:56:27,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 152. [2023-04-03 02:56:27,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 146 states have (on average 1.2465753424657535) internal successors, (182), 148 states have internal predecessors, (182), 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) [2023-04-03 02:56:27,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 185 transitions. [2023-04-03 02:56:27,222 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 185 transitions. Word has length 54 [2023-04-03 02:56:27,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:27,222 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 185 transitions. [2023-04-03 02:56:27,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 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) [2023-04-03 02:56:27,222 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 185 transitions. [2023-04-03 02:56:27,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-03 02:56:27,223 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:27,223 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] [2023-04-03 02:56:27,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:56:27,223 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:27,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:27,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1152802426, now seen corresponding path program 1 times [2023-04-03 02:56:27,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:27,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562050772] [2023-04-03 02:56:27,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:27,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:27,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:27,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:27,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562050772] [2023-04-03 02:56:27,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562050772] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:27,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:27,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:56:27,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919466834] [2023-04-03 02:56:27,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:27,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:56:27,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:27,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:56:27,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:56:27,420 INFO L87 Difference]: Start difference. First operand 152 states and 185 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:56:27,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:27,674 INFO L93 Difference]: Finished difference Result 239 states and 297 transitions. [2023-04-03 02:56:27,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:56:27,674 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-04-03 02:56:27,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:27,675 INFO L225 Difference]: With dead ends: 239 [2023-04-03 02:56:27,675 INFO L226 Difference]: Without dead ends: 155 [2023-04-03 02:56:27,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:56:27,676 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 246 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:27,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 252 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:56:27,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-04-03 02:56:27,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2023-04-03 02:56:27,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 146 states have (on average 1.2328767123287672) internal successors, (180), 148 states have internal predecessors, (180), 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) [2023-04-03 02:56:27,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 183 transitions. [2023-04-03 02:56:27,725 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 183 transitions. Word has length 55 [2023-04-03 02:56:27,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:27,726 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 183 transitions. [2023-04-03 02:56:27,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:56:27,726 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 183 transitions. [2023-04-03 02:56:27,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-03 02:56:27,726 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:27,726 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] [2023-04-03 02:56:27,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:56:27,727 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:27,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:27,727 INFO L85 PathProgramCache]: Analyzing trace with hash -576044391, now seen corresponding path program 1 times [2023-04-03 02:56:27,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:27,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492510683] [2023-04-03 02:56:27,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:27,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:27,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:27,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:27,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492510683] [2023-04-03 02:56:27,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492510683] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:27,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:27,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:56:27,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642050119] [2023-04-03 02:56:27,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:27,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:56:27,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:27,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:56:27,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:56:27,973 INFO L87 Difference]: Start difference. First operand 152 states and 183 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:56:28,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:28,331 INFO L93 Difference]: Finished difference Result 249 states and 304 transitions. [2023-04-03 02:56:28,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-03 02:56:28,331 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-04-03 02:56:28,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:28,333 INFO L225 Difference]: With dead ends: 249 [2023-04-03 02:56:28,333 INFO L226 Difference]: Without dead ends: 242 [2023-04-03 02:56:28,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:56:28,334 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 371 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:28,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 499 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:56:28,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-04-03 02:56:28,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 152. [2023-04-03 02:56:28,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 146 states have (on average 1.226027397260274) internal successors, (179), 148 states have internal predecessors, (179), 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) [2023-04-03 02:56:28,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 182 transitions. [2023-04-03 02:56:28,380 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 182 transitions. Word has length 55 [2023-04-03 02:56:28,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:28,380 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 182 transitions. [2023-04-03 02:56:28,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:56:28,381 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 182 transitions. [2023-04-03 02:56:28,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-03 02:56:28,381 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:28,381 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, 1] [2023-04-03 02:56:28,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:56:28,382 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:28,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:28,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1620204267, now seen corresponding path program 1 times [2023-04-03 02:56:28,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:28,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934932904] [2023-04-03 02:56:28,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:28,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:28,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:28,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934932904] [2023-04-03 02:56:28,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934932904] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:28,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:28,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-03 02:56:28,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97598892] [2023-04-03 02:56:28,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:28,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-03 02:56:28,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:28,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-03 02:56:28,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-03 02:56:28,872 INFO L87 Difference]: Start difference. First operand 152 states and 182 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:56:29,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:29,590 INFO L93 Difference]: Finished difference Result 368 states and 464 transitions. [2023-04-03 02:56:29,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-03 02:56:29,591 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-03 02:56:29,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:29,593 INFO L225 Difference]: With dead ends: 368 [2023-04-03 02:56:29,593 INFO L226 Difference]: Without dead ends: 362 [2023-04-03 02:56:29,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:56:29,594 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 590 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:29,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 930 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:56:29,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-04-03 02:56:29,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 146. [2023-04-03 02:56:29,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.2198581560283688) internal successors, (172), 142 states have internal predecessors, (172), 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) [2023-04-03 02:56:29,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions. [2023-04-03 02:56:29,656 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 57 [2023-04-03 02:56:29,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:29,656 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 175 transitions. [2023-04-03 02:56:29,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:56:29,657 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions. [2023-04-03 02:56:29,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-03 02:56:29,657 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:29,657 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] [2023-04-03 02:56:29,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 02:56:29,657 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:29,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:29,658 INFO L85 PathProgramCache]: Analyzing trace with hash 343947633, now seen corresponding path program 1 times [2023-04-03 02:56:29,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:29,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764794092] [2023-04-03 02:56:29,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:29,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:30,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:30,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764794092] [2023-04-03 02:56:30,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764794092] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:30,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:30,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-03 02:56:30,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54580221] [2023-04-03 02:56:30,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:30,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-03 02:56:30,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:30,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-03 02:56:30,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-04-03 02:56:30,208 INFO L87 Difference]: Start difference. First operand 146 states and 175 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:56:30,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:30,905 INFO L93 Difference]: Finished difference Result 169 states and 197 transitions. [2023-04-03 02:56:30,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:56:30,906 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-03 02:56:30,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:30,907 INFO L225 Difference]: With dead ends: 169 [2023-04-03 02:56:30,907 INFO L226 Difference]: Without dead ends: 161 [2023-04-03 02:56:30,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2023-04-03 02:56:30,908 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 243 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:30,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 871 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:56:30,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-04-03 02:56:30,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 149. [2023-04-03 02:56:30,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.2152777777777777) internal successors, (175), 145 states have internal predecessors, (175), 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) [2023-04-03 02:56:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2023-04-03 02:56:30,959 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 57 [2023-04-03 02:56:30,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:30,960 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2023-04-03 02:56:30,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:56:30,960 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2023-04-03 02:56:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 02:56:30,962 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:30,963 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] [2023-04-03 02:56:30,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:56:30,963 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:30,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:30,963 INFO L85 PathProgramCache]: Analyzing trace with hash -41069210, now seen corresponding path program 1 times [2023-04-03 02:56:30,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:30,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332315707] [2023-04-03 02:56:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:30,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:32,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:32,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332315707] [2023-04-03 02:56:32,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332315707] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:32,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:32,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:56:32,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485866158] [2023-04-03 02:56:32,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:32,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:56:32,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:32,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:56:32,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:56:32,072 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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) [2023-04-03 02:56:33,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:33,333 INFO L93 Difference]: Finished difference Result 169 states and 196 transitions. [2023-04-03 02:56:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:56:33,333 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 [2023-04-03 02:56:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:33,334 INFO L225 Difference]: With dead ends: 169 [2023-04-03 02:56:33,334 INFO L226 Difference]: Without dead ends: 161 [2023-04-03 02:56:33,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2023-04-03 02:56:33,335 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 216 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:33,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 1051 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:56:33,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-04-03 02:56:33,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 146. [2023-04-03 02:56:33,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.2127659574468086) internal successors, (171), 142 states have internal predecessors, (171), 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) [2023-04-03 02:56:33,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 174 transitions. [2023-04-03 02:56:33,379 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 174 transitions. Word has length 58 [2023-04-03 02:56:33,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:33,380 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 174 transitions. [2023-04-03 02:56:33,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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) [2023-04-03 02:56:33,380 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 174 transitions. [2023-04-03 02:56:33,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 02:56:33,380 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:33,380 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] [2023-04-03 02:56:33,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:56:33,381 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:33,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:33,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1840195957, now seen corresponding path program 1 times [2023-04-03 02:56:33,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:33,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382561648] [2023-04-03 02:56:33,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:33,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:33,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:33,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:33,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382561648] [2023-04-03 02:56:33,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382561648] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:33,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:33,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 02:56:33,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791599933] [2023-04-03 02:56:33,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:33,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 02:56:33,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:33,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 02:56:33,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:56:33,949 INFO L87 Difference]: Start difference. First operand 146 states and 174 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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) [2023-04-03 02:56:34,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:34,619 INFO L93 Difference]: Finished difference Result 225 states and 274 transitions. [2023-04-03 02:56:34,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-03 02:56:34,619 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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 [2023-04-03 02:56:34,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:34,620 INFO L225 Difference]: With dead ends: 225 [2023-04-03 02:56:34,621 INFO L226 Difference]: Without dead ends: 213 [2023-04-03 02:56:34,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2023-04-03 02:56:34,622 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 363 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:34,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 1064 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:56:34,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-04-03 02:56:34,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 146. [2023-04-03 02:56:34,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.2056737588652482) internal successors, (170), 142 states have internal predecessors, (170), 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) [2023-04-03 02:56:34,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 173 transitions. [2023-04-03 02:56:34,674 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 173 transitions. Word has length 58 [2023-04-03 02:56:34,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:34,674 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 173 transitions. [2023-04-03 02:56:34,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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) [2023-04-03 02:56:34,674 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 173 transitions. [2023-04-03 02:56:34,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:56:34,675 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:34,675 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] [2023-04-03 02:56:34,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 02:56:34,676 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:34,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:34,676 INFO L85 PathProgramCache]: Analyzing trace with hash -890816202, now seen corresponding path program 1 times [2023-04-03 02:56:34,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:34,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087740345] [2023-04-03 02:56:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:34,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:35,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:35,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087740345] [2023-04-03 02:56:35,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087740345] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:35,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:35,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-03 02:56:35,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843564130] [2023-04-03 02:56:35,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:35,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-03 02:56:35,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:35,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-03 02:56:35,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-03 02:56:35,119 INFO L87 Difference]: Start difference. First operand 146 states and 173 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:56:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:35,583 INFO L93 Difference]: Finished difference Result 226 states and 277 transitions. [2023-04-03 02:56:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-03 02:56:35,583 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-04-03 02:56:35,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:35,584 INFO L225 Difference]: With dead ends: 226 [2023-04-03 02:56:35,585 INFO L226 Difference]: Without dead ends: 214 [2023-04-03 02:56:35,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:56:35,586 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 371 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:35,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 638 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:56:35,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-04-03 02:56:35,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 134. [2023-04-03 02:56:35,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 130 states have (on average 1.2153846153846153) internal successors, (158), 130 states have internal predecessors, (158), 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) [2023-04-03 02:56:35,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 161 transitions. [2023-04-03 02:56:35,637 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 161 transitions. Word has length 59 [2023-04-03 02:56:35,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:35,637 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 161 transitions. [2023-04-03 02:56:35,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:56:35,637 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 161 transitions. [2023-04-03 02:56:35,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-03 02:56:35,638 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:35,638 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] [2023-04-03 02:56:35,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 02:56:35,638 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:35,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:35,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1225488428, now seen corresponding path program 1 times [2023-04-03 02:56:35,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:35,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450958673] [2023-04-03 02:56:35,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:35,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:35,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:35,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450958673] [2023-04-03 02:56:35,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450958673] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:35,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:35,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:56:35,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166008568] [2023-04-03 02:56:35,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:35,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:56:35,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:35,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:56:35,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:56:35,748 INFO L87 Difference]: Start difference. First operand 134 states and 161 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) [2023-04-03 02:56:35,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:35,836 INFO L93 Difference]: Finished difference Result 196 states and 245 transitions. [2023-04-03 02:56:35,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:56:35,837 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 [2023-04-03 02:56:35,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:35,838 INFO L225 Difference]: With dead ends: 196 [2023-04-03 02:56:35,838 INFO L226 Difference]: Without dead ends: 168 [2023-04-03 02:56:35,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:56:35,839 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 44 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:35,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 193 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:56:35,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-04-03 02:56:35,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 158. [2023-04-03 02:56:35,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 154 states have (on average 1.2337662337662338) internal successors, (190), 154 states have internal predecessors, (190), 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) [2023-04-03 02:56:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 193 transitions. [2023-04-03 02:56:35,908 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 193 transitions. Word has length 68 [2023-04-03 02:56:35,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:35,908 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 193 transitions. [2023-04-03 02:56:35,909 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) [2023-04-03 02:56:35,909 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 193 transitions. [2023-04-03 02:56:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-03 02:56:35,909 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:35,910 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] [2023-04-03 02:56:35,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 02:56:35,910 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:35,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:35,910 INFO L85 PathProgramCache]: Analyzing trace with hash 2146098970, now seen corresponding path program 1 times [2023-04-03 02:56:35,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:35,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007842094] [2023-04-03 02:56:35,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:35,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:36,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:36,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007842094] [2023-04-03 02:56:36,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007842094] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:36,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:36,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:56:36,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730367838] [2023-04-03 02:56:36,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:36,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:56:36,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:36,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:56:36,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:56:36,022 INFO L87 Difference]: Start difference. First operand 158 states and 193 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2023-04-03 02:56:36,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:36,147 INFO L93 Difference]: Finished difference Result 310 states and 401 transitions. [2023-04-03 02:56:36,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:56:36,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 71 [2023-04-03 02:56:36,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:36,149 INFO L225 Difference]: With dead ends: 310 [2023-04-03 02:56:36,149 INFO L226 Difference]: Without dead ends: 234 [2023-04-03 02:56:36,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:56:36,150 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 37 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:36,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 193 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:56:36,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-04-03 02:56:36,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 220. [2023-04-03 02:56:36,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 216 states have (on average 1.2731481481481481) internal successors, (275), 216 states have internal predecessors, (275), 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) [2023-04-03 02:56:36,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 278 transitions. [2023-04-03 02:56:36,251 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 278 transitions. Word has length 71 [2023-04-03 02:56:36,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:36,251 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 278 transitions. [2023-04-03 02:56:36,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2023-04-03 02:56:36,252 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 278 transitions. [2023-04-03 02:56:36,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-03 02:56:36,252 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:36,253 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] [2023-04-03 02:56:36,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-03 02:56:36,253 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:36,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:36,253 INFO L85 PathProgramCache]: Analyzing trace with hash -409061960, now seen corresponding path program 1 times [2023-04-03 02:56:36,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:36,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161670506] [2023-04-03 02:56:36,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:36,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:36,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:36,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161670506] [2023-04-03 02:56:36,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161670506] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:36,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:36,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:56:36,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678756417] [2023-04-03 02:56:36,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:36,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:56:36,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:36,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:56:36,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:56:36,366 INFO L87 Difference]: Start difference. First operand 220 states and 278 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2023-04-03 02:56:36,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:36,570 INFO L93 Difference]: Finished difference Result 496 states and 656 transitions. [2023-04-03 02:56:36,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:56:36,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 74 [2023-04-03 02:56:36,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:36,572 INFO L225 Difference]: With dead ends: 496 [2023-04-03 02:56:36,572 INFO L226 Difference]: Without dead ends: 358 [2023-04-03 02:56:36,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:56:36,574 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 27 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:36,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 193 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:56:36,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2023-04-03 02:56:36,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 332. [2023-04-03 02:56:36,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 328 states have (on average 1.3018292682926829) internal successors, (427), 328 states have internal predecessors, (427), 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) [2023-04-03 02:56:36,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 430 transitions. [2023-04-03 02:56:36,758 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 430 transitions. Word has length 74 [2023-04-03 02:56:36,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:36,758 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 430 transitions. [2023-04-03 02:56:36,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2023-04-03 02:56:36,758 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 430 transitions. [2023-04-03 02:56:36,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 02:56:36,759 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:36,759 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] [2023-04-03 02:56:36,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-03 02:56:36,760 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:36,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:36,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2093326469, now seen corresponding path program 1 times [2023-04-03 02:56:36,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:36,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123235485] [2023-04-03 02:56:36,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:36,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:36,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:36,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123235485] [2023-04-03 02:56:36,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123235485] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:36,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:36,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:56:36,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932284219] [2023-04-03 02:56:36,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:36,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:56:36,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:36,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:56:36,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:56:36,841 INFO L87 Difference]: Start difference. First operand 332 states and 430 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 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) [2023-04-03 02:56:37,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:37,438 INFO L93 Difference]: Finished difference Result 1106 states and 1474 transitions. [2023-04-03 02:56:37,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 02:56:37,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 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 [2023-04-03 02:56:37,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:37,443 INFO L225 Difference]: With dead ends: 1106 [2023-04-03 02:56:37,443 INFO L226 Difference]: Without dead ends: 856 [2023-04-03 02:56:37,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:56:37,445 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 292 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:37,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 389 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:56:37,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2023-04-03 02:56:37,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 492. [2023-04-03 02:56:37,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 488 states have (on average 1.3012295081967213) internal successors, (635), 488 states have internal predecessors, (635), 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) [2023-04-03 02:56:37,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 638 transitions. [2023-04-03 02:56:37,751 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 638 transitions. Word has length 77 [2023-04-03 02:56:37,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:37,752 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 638 transitions. [2023-04-03 02:56:37,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 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) [2023-04-03 02:56:37,752 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 638 transitions. [2023-04-03 02:56:37,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-03 02:56:37,753 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:37,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:56:37,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-03 02:56:37,753 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:37,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:37,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1217822946, now seen corresponding path program 1 times [2023-04-03 02:56:37,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:37,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726554386] [2023-04-03 02:56:37,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:37,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:37,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:37,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:37,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726554386] [2023-04-03 02:56:37,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726554386] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:37,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:37,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:56:37,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261944319] [2023-04-03 02:56:37,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:37,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:56:37,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:37,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:56:37,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:56:37,893 INFO L87 Difference]: Start difference. First operand 492 states and 638 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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) [2023-04-03 02:56:38,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:38,256 INFO L93 Difference]: Finished difference Result 904 states and 1188 transitions. [2023-04-03 02:56:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:56:38,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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 79 [2023-04-03 02:56:38,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:38,259 INFO L225 Difference]: With dead ends: 904 [2023-04-03 02:56:38,259 INFO L226 Difference]: Without dead ends: 494 [2023-04-03 02:56:38,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:56:38,261 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 78 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:38,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 165 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:56:38,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2023-04-03 02:56:38,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 492. [2023-04-03 02:56:38,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 488 states have (on average 1.2971311475409837) internal successors, (633), 488 states have internal predecessors, (633), 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) [2023-04-03 02:56:38,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 636 transitions. [2023-04-03 02:56:38,548 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 636 transitions. Word has length 79 [2023-04-03 02:56:38,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:38,549 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 636 transitions. [2023-04-03 02:56:38,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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) [2023-04-03 02:56:38,549 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 636 transitions. [2023-04-03 02:56:38,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-03 02:56:38,549 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:38,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:56:38,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-03 02:56:38,550 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:38,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:38,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1928010595, now seen corresponding path program 1 times [2023-04-03 02:56:38,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:38,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145810508] [2023-04-03 02:56:38,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:38,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:38,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:38,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145810508] [2023-04-03 02:56:38,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145810508] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:38,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:38,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:56:38,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838419818] [2023-04-03 02:56:38,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:38,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:56:38,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:38,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:56:38,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:56:38,600 INFO L87 Difference]: Start difference. First operand 492 states and 636 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-04-03 02:56:39,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:39,019 INFO L93 Difference]: Finished difference Result 1000 states and 1316 transitions. [2023-04-03 02:56:39,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:56:39,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 79 [2023-04-03 02:56:39,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:39,024 INFO L225 Difference]: With dead ends: 1000 [2023-04-03 02:56:39,024 INFO L226 Difference]: Without dead ends: 590 [2023-04-03 02:56:39,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:56:39,026 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 53 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:39,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 147 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:56:39,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-04-03 02:56:39,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 588. [2023-04-03 02:56:39,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 584 states have (on average 1.292808219178082) internal successors, (755), 584 states have internal predecessors, (755), 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) [2023-04-03 02:56:39,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 758 transitions. [2023-04-03 02:56:39,346 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 758 transitions. Word has length 79 [2023-04-03 02:56:39,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:39,347 INFO L495 AbstractCegarLoop]: Abstraction has 588 states and 758 transitions. [2023-04-03 02:56:39,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-04-03 02:56:39,347 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 758 transitions. [2023-04-03 02:56:39,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-03 02:56:39,347 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:39,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:56:39,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-03 02:56:39,348 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:39,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:39,348 INFO L85 PathProgramCache]: Analyzing trace with hash 843026732, now seen corresponding path program 1 times [2023-04-03 02:56:39,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:39,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073971175] [2023-04-03 02:56:39,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:39,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:39,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:39,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073971175] [2023-04-03 02:56:39,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073971175] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:39,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:39,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 02:56:39,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685895504] [2023-04-03 02:56:39,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:39,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 02:56:39,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:39,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 02:56:39,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:56:39,521 INFO L87 Difference]: Start difference. First operand 588 states and 758 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2023-04-03 02:56:40,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:40,240 INFO L93 Difference]: Finished difference Result 886 states and 1126 transitions. [2023-04-03 02:56:40,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-03 02:56:40,241 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 80 [2023-04-03 02:56:40,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:40,244 INFO L225 Difference]: With dead ends: 886 [2023-04-03 02:56:40,244 INFO L226 Difference]: Without dead ends: 884 [2023-04-03 02:56:40,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:56:40,246 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 128 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:40,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 500 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:56:40,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2023-04-03 02:56:40,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 612. [2023-04-03 02:56:40,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 608 states have (on average 1.261513157894737) internal successors, (767), 608 states have internal predecessors, (767), 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) [2023-04-03 02:56:40,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 770 transitions. [2023-04-03 02:56:40,615 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 770 transitions. Word has length 80 [2023-04-03 02:56:40,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:40,616 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 770 transitions. [2023-04-03 02:56:40,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2023-04-03 02:56:40,617 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 770 transitions. [2023-04-03 02:56:40,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-03 02:56:40,618 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:40,618 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:56:40,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-03 02:56:40,620 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:40,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:40,620 INFO L85 PathProgramCache]: Analyzing trace with hash 835316746, now seen corresponding path program 1 times [2023-04-03 02:56:40,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:40,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109521516] [2023-04-03 02:56:40,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:40,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 02:56:40,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:40,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109521516] [2023-04-03 02:56:40,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109521516] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:40,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:40,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:56:40,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822543955] [2023-04-03 02:56:40,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:40,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:56:40,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:40,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:56:40,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:56:40,856 INFO L87 Difference]: Start difference. First operand 612 states and 770 transitions. Second operand has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 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) [2023-04-03 02:56:41,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:41,685 INFO L93 Difference]: Finished difference Result 1524 states and 1929 transitions. [2023-04-03 02:56:41,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-03 02:56:41,686 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 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 91 [2023-04-03 02:56:41,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:41,690 INFO L225 Difference]: With dead ends: 1524 [2023-04-03 02:56:41,690 INFO L226 Difference]: Without dead ends: 980 [2023-04-03 02:56:41,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:56:41,697 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 341 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:41,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 278 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:56:41,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2023-04-03 02:56:42,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 612. [2023-04-03 02:56:42,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 608 states have (on average 1.2582236842105263) internal successors, (765), 608 states have internal predecessors, (765), 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) [2023-04-03 02:56:42,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 768 transitions. [2023-04-03 02:56:42,081 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 768 transitions. Word has length 91 [2023-04-03 02:56:42,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:42,081 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 768 transitions. [2023-04-03 02:56:42,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 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) [2023-04-03 02:56:42,081 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 768 transitions. [2023-04-03 02:56:42,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-04-03 02:56:42,082 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:42,082 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:56:42,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-04-03 02:56:42,083 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:42,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:42,083 INFO L85 PathProgramCache]: Analyzing trace with hash 2130122717, now seen corresponding path program 1 times [2023-04-03 02:56:42,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:42,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053491585] [2023-04-03 02:56:42,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:42,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:44,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:44,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053491585] [2023-04-03 02:56:44,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053491585] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:56:44,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532012287] [2023-04-03 02:56:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:44,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:56:44,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:56:44,021 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:56:44,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:56:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:44,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-03 02:56:44,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:56:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-03 02:56:46,628 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:56:46,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532012287] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:46,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:56:46,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [27] total 41 [2023-04-03 02:56:46,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204048982] [2023-04-03 02:56:46,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:46,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-03 02:56:46,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:46,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-03 02:56:46,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1483, Unknown=0, NotChecked=0, Total=1640 [2023-04-03 02:56:46,631 INFO L87 Difference]: Start difference. First operand 612 states and 768 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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) [2023-04-03 02:56:49,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:49,038 INFO L93 Difference]: Finished difference Result 1696 states and 2155 transitions. [2023-04-03 02:56:49,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:56:49,039 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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 93 [2023-04-03 02:56:49,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:49,043 INFO L225 Difference]: With dead ends: 1696 [2023-04-03 02:56:49,043 INFO L226 Difference]: Without dead ends: 1157 [2023-04-03 02:56:49,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=218, Invalid=2134, Unknown=0, NotChecked=0, Total=2352 [2023-04-03 02:56:49,046 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 168 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:49,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1015 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:56:49,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2023-04-03 02:56:49,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 617. [2023-04-03 02:56:49,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 613 states have (on average 1.2561174551386622) internal successors, (770), 613 states have internal predecessors, (770), 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) [2023-04-03 02:56:49,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 773 transitions. [2023-04-03 02:56:49,582 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 773 transitions. Word has length 93 [2023-04-03 02:56:49,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:49,582 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 773 transitions. [2023-04-03 02:56:49,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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) [2023-04-03 02:56:49,583 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 773 transitions. [2023-04-03 02:56:49,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-03 02:56:49,584 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:49,584 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:56:49,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 02:56:49,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-04-03 02:56:49,793 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:49,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:49,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1042894697, now seen corresponding path program 1 times [2023-04-03 02:56:49,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:49,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923676290] [2023-04-03 02:56:49,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:49,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-03 02:56:49,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:49,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923676290] [2023-04-03 02:56:49,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923676290] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:49,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:49,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 02:56:49,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070193443] [2023-04-03 02:56:49,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:49,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:56:49,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:49,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:56:49,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 02:56:49,874 INFO L87 Difference]: Start difference. First operand 617 states and 773 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2023-04-03 02:56:50,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:50,476 INFO L93 Difference]: Finished difference Result 995 states and 1260 transitions. [2023-04-03 02:56:50,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:56:50,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 94 [2023-04-03 02:56:50,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:50,479 INFO L225 Difference]: With dead ends: 995 [2023-04-03 02:56:50,479 INFO L226 Difference]: Without dead ends: 617 [2023-04-03 02:56:50,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:56:50,482 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 117 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:50,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 110 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:56:50,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2023-04-03 02:56:50,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 449. [2023-04-03 02:56:50,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 445 states have (on average 1.2292134831460675) internal successors, (547), 445 states have internal predecessors, (547), 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) [2023-04-03 02:56:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 550 transitions. [2023-04-03 02:56:50,869 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 550 transitions. Word has length 94 [2023-04-03 02:56:50,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:50,869 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 550 transitions. [2023-04-03 02:56:50,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2023-04-03 02:56:50,869 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 550 transitions. [2023-04-03 02:56:50,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-03 02:56:50,870 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:50,870 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:56:50,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-04-03 02:56:50,871 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-03 02:56:50,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:50,871 INFO L85 PathProgramCache]: Analyzing trace with hash 678436178, now seen corresponding path program 1 times [2023-04-03 02:56:50,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:50,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489937185] [2023-04-03 02:56:50,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:50,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:53,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:53,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:53,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489937185] [2023-04-03 02:56:53,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489937185] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:56:53,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688634061] [2023-04-03 02:56:53,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:53,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:56:53,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:56:53,236 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:56:53,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 02:56:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:53,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 69 conjunts are in the unsatisfiable core [2023-04-03 02:56:53,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:56:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:59,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:58:11,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:58:11,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688634061] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:58:11,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [108505648] [2023-04-03 02:58:11,791 INFO L159 IcfgInterpreter]: Started Sifa with 84 locations of interest [2023-04-03 02:58:11,791 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:58:11,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:58:11,801 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:58:11,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:58:12,473 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 168 for LOIs [2023-04-03 02:58:18,361 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12