/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.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:37:34,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:37:34,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:37:34,407 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:37:34,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:37:34,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:37:34,409 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:37:34,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:37:34,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:37:34,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:37:34,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:37:34,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:37:34,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:37:34,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:37:34,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:37:34,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:37:34,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:37:34,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:37:34,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:37:34,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:37:34,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:37:34,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:37:34,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:37:34,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:37:34,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:37:34,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:37:34,424 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:37:34,425 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:37:34,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:37:34,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:37:34,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:37:34,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:37:34,427 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:37:34,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:37:34,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:37:34,428 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:37:34,428 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:37:34,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:37:34,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:37:34,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:37:34,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:37:34,430 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:37:34,446 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:37:34,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:37:34,446 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:37:34,446 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:37:34,447 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:37:34,447 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:37:34,447 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:37:34,447 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:37:34,447 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:37:34,447 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:37:34,447 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:37:34,448 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:37:34,448 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:37:34,448 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:37:34,448 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:37:34,448 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:37:34,448 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:37:34,448 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:37:34,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:37:34,448 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:37:34,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:37:34,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:37:34,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:37:34,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:37:34,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:37:34,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:37:34,449 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:37:34,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:37:34,449 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:37:34,449 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:37:34,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:37:34,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:37:34,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:37:34,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:37:34,450 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:37:34,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:37:34,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:37:34,450 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:37:34,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:37:34,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:37:34,450 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:37:34,450 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:37:34,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:37:34,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:37:34,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:37:34,612 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:37:34,613 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:37:34,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2023-04-01 06:37:35,595 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:37:35,826 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:37:35,827 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2023-04-01 06:37:35,841 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1577e8f1/62f9249edd9b4ed6a3f9217a2c97fd15/FLAGb8a8d3b3c [2023-04-01 06:37:35,852 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1577e8f1/62f9249edd9b4ed6a3f9217a2c97fd15 [2023-04-01 06:37:35,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:37:35,855 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:37:35,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:37:35,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:37:35,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:37:35,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:37:35" (1/1) ... [2023-04-01 06:37:35,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f30e817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:35, skipping insertion in model container [2023-04-01 06:37:35,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:37:35" (1/1) ... [2023-04-01 06:37:35,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:37:35,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:37:36,054 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.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[5817,5830] [2023-04-01 06:37:36,071 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[8470,8483] [2023-04-01 06:37:36,083 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.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[11277,11290] [2023-04-01 06:37:36,110 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.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[13832,13845] [2023-04-01 06:37:36,122 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.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[16838,16851] [2023-04-01 06:37:36,129 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.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[19408,19421] [2023-04-01 06:37:36,141 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.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[22168,22181] [2023-04-01 06:37:36,161 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:37:36,181 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:37:36,220 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.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[5817,5830] [2023-04-01 06:37:36,245 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.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[8470,8483] [2023-04-01 06:37:36,268 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.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[11277,11290] [2023-04-01 06:37:36,280 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.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[13832,13845] [2023-04-01 06:37:36,301 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.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[16838,16851] [2023-04-01 06:37:36,313 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.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[19408,19421] [2023-04-01 06:37:36,334 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[22168,22181] [2023-04-01 06:37:36,358 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:37:36,371 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:37:36,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:36 WrapperNode [2023-04-01 06:37:36,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:37:36,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:37:36,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:37:36,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:37:36,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:36" (1/1) ... [2023-04-01 06:37:36,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:36" (1/1) ... [2023-04-01 06:37:36,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:36" (1/1) ... [2023-04-01 06:37:36,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:36" (1/1) ... [2023-04-01 06:37:36,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:36" (1/1) ... [2023-04-01 06:37:36,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:36" (1/1) ... [2023-04-01 06:37:36,427 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:36" (1/1) ... [2023-04-01 06:37:36,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:36" (1/1) ... [2023-04-01 06:37:36,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:37:36,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:37:36,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:37:36,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:37:36,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:36" (1/1) ... [2023-04-01 06:37:36,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:37:36,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:37:36,463 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:37:36,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:37:36,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:37:36,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:37:36,519 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:37:36,519 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:37:36,519 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:37:36,519 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:37:36,519 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:37:36,519 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:37:36,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:37:36,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:37:36,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:37:36,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 06:37:36,519 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:37:36,520 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:37:36,520 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:37:36,520 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:37:36,520 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:37:36,520 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:37:36,520 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:37:36,520 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:37:36,520 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:37:36,520 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:37:36,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:37:36,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:37:36,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:37:36,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:37:36,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:37:36,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:37:36,653 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:37:36,654 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:37:37,240 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:37:37,290 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:37:37,290 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:37:37,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:37:37 BoogieIcfgContainer [2023-04-01 06:37:37,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:37:37,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:37:37,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:37:37,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:37:37,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:37:35" (1/3) ... [2023-04-01 06:37:37,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c7b76a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:37:37, skipping insertion in model container [2023-04-01 06:37:37,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:36" (2/3) ... [2023-04-01 06:37:37,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c7b76a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:37:37, skipping insertion in model container [2023-04-01 06:37:37,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:37:37" (3/3) ... [2023-04-01 06:37:37,303 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2023-04-01 06:37:37,314 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:37:37,314 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-04-01 06:37:37,359 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:37:37,364 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;@d600a23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:37:37,364 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-04-01 06:37:37,369 INFO L276 IsEmpty]: Start isEmpty. Operand has 255 states, 243 states have (on average 1.831275720164609) internal successors, (445), 250 states have internal predecessors, (445), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 06:37:37,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 06:37:37,381 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:37,381 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] [2023-04-01 06:37:37,382 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:37,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:37,387 INFO L85 PathProgramCache]: Analyzing trace with hash 225351262, now seen corresponding path program 1 times [2023-04-01 06:37:37,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:37,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546863547] [2023-04-01 06:37:37,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:37,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:37,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:37,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546863547] [2023-04-01 06:37:37,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546863547] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:37,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:37,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:37:37,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319901169] [2023-04-01 06:37:37,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:37,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:37:37,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:37,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:37:37,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:37:37,889 INFO L87 Difference]: Start difference. First operand has 255 states, 243 states have (on average 1.831275720164609) internal successors, (445), 250 states have internal predecessors, (445), 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 9.4) 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) [2023-04-01 06:37:38,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:38,162 INFO L93 Difference]: Finished difference Result 352 states and 595 transitions. [2023-04-01 06:37:38,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:37:38,164 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 [2023-04-01 06:37:38,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:38,173 INFO L225 Difference]: With dead ends: 352 [2023-04-01 06:37:38,174 INFO L226 Difference]: Without dead ends: 219 [2023-04-01 06:37:38,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:37:38,183 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 1031 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:38,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1031 Valid, 275 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:37:38,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-04-01 06:37:38,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2023-04-01 06:37:38,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 209 states have (on average 1.2488038277511961) internal successors, (261), 215 states have internal predecessors, (261), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:38,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 264 transitions. [2023-04-01 06:37:38,231 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 264 transitions. Word has length 50 [2023-04-01 06:37:38,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:38,232 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 264 transitions. [2023-04-01 06:37:38,232 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) [2023-04-01 06:37:38,233 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 264 transitions. [2023-04-01 06:37:38,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 06:37:38,238 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:38,239 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] [2023-04-01 06:37:38,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:37:38,239 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:38,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:38,240 INFO L85 PathProgramCache]: Analyzing trace with hash 869880623, now seen corresponding path program 1 times [2023-04-01 06:37:38,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:38,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382214863] [2023-04-01 06:37:38,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:38,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:38,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:38,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382214863] [2023-04-01 06:37:38,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382214863] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:38,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:38,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:37:38,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170062685] [2023-04-01 06:37:38,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:38,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:37:38,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:38,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:37:38,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:37:38,405 INFO L87 Difference]: Start difference. First operand 219 states and 264 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) [2023-04-01 06:37:38,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:38,547 INFO L93 Difference]: Finished difference Result 272 states and 325 transitions. [2023-04-01 06:37:38,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:37:38,548 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 [2023-04-01 06:37:38,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:38,550 INFO L225 Difference]: With dead ends: 272 [2023-04-01 06:37:38,550 INFO L226 Difference]: Without dead ends: 165 [2023-04-01 06:37:38,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:37:38,552 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 534 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:38,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 124 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:37:38,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-04-01 06:37:38,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2023-04-01 06:37:38,574 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) [2023-04-01 06:37:38,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 195 transitions. [2023-04-01 06:37:38,575 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 195 transitions. Word has length 50 [2023-04-01 06:37:38,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:38,575 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 195 transitions. [2023-04-01 06:37:38,575 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) [2023-04-01 06:37:38,576 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 195 transitions. [2023-04-01 06:37:38,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 06:37:38,577 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:38,577 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] [2023-04-01 06:37:38,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:37:38,578 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:38,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:38,578 INFO L85 PathProgramCache]: Analyzing trace with hash -694123164, now seen corresponding path program 1 times [2023-04-01 06:37:38,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:38,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245728574] [2023-04-01 06:37:38,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:38,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:38,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:38,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245728574] [2023-04-01 06:37:38,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245728574] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:38,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:38,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:37:38,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579065460] [2023-04-01 06:37:38,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:38,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:37:38,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:38,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:37:38,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:37:38,701 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) [2023-04-01 06:37:38,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:38,788 INFO L93 Difference]: Finished difference Result 228 states and 272 transitions. [2023-04-01 06:37:38,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:37:38,788 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 [2023-04-01 06:37:38,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:38,789 INFO L225 Difference]: With dead ends: 228 [2023-04-01 06:37:38,789 INFO L226 Difference]: Without dead ends: 143 [2023-04-01 06:37:38,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:37:38,793 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 465 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:38,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 108 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:37:38,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-04-01 06:37:38,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2023-04-01 06:37:38,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 133 states have (on average 1.2406015037593985) internal successors, (165), 139 states have internal predecessors, (165), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:38,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2023-04-01 06:37:38,801 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 50 [2023-04-01 06:37:38,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:38,801 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2023-04-01 06:37:38,801 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) [2023-04-01 06:37:38,802 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2023-04-01 06:37:38,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 06:37:38,803 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:38,803 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] [2023-04-01 06:37:38,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:37:38,803 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:38,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:38,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1781525404, now seen corresponding path program 1 times [2023-04-01 06:37:38,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:38,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895816495] [2023-04-01 06:37:38,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:38,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:39,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:39,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895816495] [2023-04-01 06:37:39,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895816495] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:39,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:39,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 06:37:39,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277183668] [2023-04-01 06:37:39,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:39,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 06:37:39,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:39,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 06:37:39,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:37:39,097 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 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) [2023-04-01 06:37:39,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:39,505 INFO L93 Difference]: Finished difference Result 273 states and 328 transitions. [2023-04-01 06:37:39,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:37:39,505 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 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 [2023-04-01 06:37:39,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:39,507 INFO L225 Difference]: With dead ends: 273 [2023-04-01 06:37:39,507 INFO L226 Difference]: Without dead ends: 268 [2023-04-01 06:37:39,508 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 [2023-04-01 06:37:39,508 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 918 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:39,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 535 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:37:39,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-04-01 06:37:39,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 143. [2023-04-01 06:37:39,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 133 states have (on average 1.2330827067669172) internal successors, (164), 139 states have internal predecessors, (164), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:39,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 167 transitions. [2023-04-01 06:37:39,518 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 167 transitions. Word has length 51 [2023-04-01 06:37:39,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:39,519 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 167 transitions. [2023-04-01 06:37:39,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 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) [2023-04-01 06:37:39,519 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 167 transitions. [2023-04-01 06:37:39,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 06:37:39,519 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:39,519 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] [2023-04-01 06:37:39,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:37:39,519 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:39,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:39,520 INFO L85 PathProgramCache]: Analyzing trace with hash 2068729148, now seen corresponding path program 1 times [2023-04-01 06:37:39,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:39,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946878566] [2023-04-01 06:37:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:39,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:39,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:39,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946878566] [2023-04-01 06:37:39,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946878566] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:39,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:39,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 06:37:39,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792791242] [2023-04-01 06:37:39,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:39,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 06:37:39,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:39,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 06:37:39,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:37:39,734 INFO L87 Difference]: Start difference. First operand 143 states and 167 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 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) [2023-04-01 06:37:40,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:40,114 INFO L93 Difference]: Finished difference Result 317 states and 385 transitions. [2023-04-01 06:37:40,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:37:40,115 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 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 [2023-04-01 06:37:40,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:40,116 INFO L225 Difference]: With dead ends: 317 [2023-04-01 06:37:40,116 INFO L226 Difference]: Without dead ends: 272 [2023-04-01 06:37:40,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-04-01 06:37:40,117 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 926 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:40,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 546 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:37:40,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-04-01 06:37:40,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 143. [2023-04-01 06:37:40,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 133 states have (on average 1.2255639097744362) internal successors, (163), 139 states have internal predecessors, (163), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:40,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 166 transitions. [2023-04-01 06:37:40,129 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 166 transitions. Word has length 51 [2023-04-01 06:37:40,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:40,130 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 166 transitions. [2023-04-01 06:37:40,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 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) [2023-04-01 06:37:40,130 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 166 transitions. [2023-04-01 06:37:40,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 06:37:40,131 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:40,131 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] [2023-04-01 06:37:40,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:37:40,131 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:40,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:40,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1343770604, now seen corresponding path program 1 times [2023-04-01 06:37:40,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:40,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310858531] [2023-04-01 06:37:40,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:40,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:40,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:40,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310858531] [2023-04-01 06:37:40,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310858531] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:40,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:40,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 06:37:40,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312657058] [2023-04-01 06:37:40,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:40,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 06:37:40,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:40,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 06:37:40,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 06:37:40,327 INFO L87 Difference]: Start difference. First operand 143 states and 166 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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) [2023-04-01 06:37:40,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:40,508 INFO L93 Difference]: Finished difference Result 268 states and 312 transitions. [2023-04-01 06:37:40,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 06:37:40,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 [2023-04-01 06:37:40,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:40,511 INFO L225 Difference]: With dead ends: 268 [2023-04-01 06:37:40,511 INFO L226 Difference]: Without dead ends: 200 [2023-04-01 06:37:40,512 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 [2023-04-01 06:37:40,514 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 919 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:40,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [919 Valid, 271 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:37:40,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-04-01 06:37:40,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2023-04-01 06:37:40,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 133 states have (on average 1.218045112781955) internal successors, (162), 139 states have internal predecessors, (162), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:40,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 165 transitions. [2023-04-01 06:37:40,528 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 165 transitions. Word has length 51 [2023-04-01 06:37:40,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:40,528 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 165 transitions. [2023-04-01 06:37:40,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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) [2023-04-01 06:37:40,528 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 165 transitions. [2023-04-01 06:37:40,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 06:37:40,528 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:40,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:37:40,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:37:40,529 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:40,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:40,529 INFO L85 PathProgramCache]: Analyzing trace with hash -116908945, now seen corresponding path program 1 times [2023-04-01 06:37:40,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:40,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201397601] [2023-04-01 06:37:40,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:40,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:41,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:41,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:41,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201397601] [2023-04-01 06:37:41,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201397601] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:41,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:41,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-01 06:37:41,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25372800] [2023-04-01 06:37:41,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:41,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 06:37:41,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:41,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 06:37:41,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2023-04-01 06:37:41,277 INFO L87 Difference]: Start difference. First operand 143 states and 165 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:42,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:42,441 INFO L93 Difference]: Finished difference Result 345 states and 400 transitions. [2023-04-01 06:37:42,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 06:37:42,442 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-01 06:37:42,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:42,443 INFO L225 Difference]: With dead ends: 345 [2023-04-01 06:37:42,443 INFO L226 Difference]: Without dead ends: 341 [2023-04-01 06:37:42,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 06:37:42,444 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 1132 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 2356 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:42,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1132 Valid, 2356 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 06:37:42,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-04-01 06:37:42,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 153. [2023-04-01 06:37:42,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 143 states have (on average 1.2377622377622377) internal successors, (177), 149 states have internal predecessors, (177), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:42,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 180 transitions. [2023-04-01 06:37:42,463 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 180 transitions. Word has length 53 [2023-04-01 06:37:42,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:42,464 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 180 transitions. [2023-04-01 06:37:42,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:42,464 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 180 transitions. [2023-04-01 06:37:42,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 06:37:42,464 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:42,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:37:42,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:37:42,465 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:42,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:42,465 INFO L85 PathProgramCache]: Analyzing trace with hash 368994135, now seen corresponding path program 1 times [2023-04-01 06:37:42,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:42,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237196216] [2023-04-01 06:37:42,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:42,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:42,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:42,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237196216] [2023-04-01 06:37:42,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237196216] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:42,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:42,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 06:37:42,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804238832] [2023-04-01 06:37:42,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:42,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 06:37:42,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:42,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 06:37:42,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-01 06:37:42,761 INFO L87 Difference]: Start difference. First operand 153 states and 180 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:43,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:43,182 INFO L93 Difference]: Finished difference Result 322 states and 384 transitions. [2023-04-01 06:37:43,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 06:37:43,182 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-01 06:37:43,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:43,183 INFO L225 Difference]: With dead ends: 322 [2023-04-01 06:37:43,183 INFO L226 Difference]: Without dead ends: 261 [2023-04-01 06:37:43,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2023-04-01 06:37:43,185 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 694 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:43,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 672 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:37:43,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-04-01 06:37:43,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 120. [2023-04-01 06:37:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 113 states have (on average 1.2212389380530972) internal successors, (138), 116 states have internal predecessors, (138), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2023-04-01 06:37:43,212 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 53 [2023-04-01 06:37:43,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:43,213 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2023-04-01 06:37:43,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:43,214 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2023-04-01 06:37:43,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 06:37:43,214 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:43,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:37:43,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:37:43,214 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr5ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:43,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:43,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1321883064, now seen corresponding path program 1 times [2023-04-01 06:37:43,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:43,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922026937] [2023-04-01 06:37:43,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:43,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:43,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:43,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:43,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922026937] [2023-04-01 06:37:43,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922026937] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:43,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:43,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 06:37:43,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201267844] [2023-04-01 06:37:43,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:43,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 06:37:43,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:43,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 06:37:43,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:37:43,360 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:43,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:43,644 INFO L93 Difference]: Finished difference Result 223 states and 265 transitions. [2023-04-01 06:37:43,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 06:37:43,644 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-04-01 06:37:43,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:43,645 INFO L225 Difference]: With dead ends: 223 [2023-04-01 06:37:43,645 INFO L226 Difference]: Without dead ends: 177 [2023-04-01 06:37:43,646 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 [2023-04-01 06:37:43,646 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 551 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:43,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 381 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:37:43,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-04-01 06:37:43,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 120. [2023-04-01 06:37:43,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 113 states have (on average 1.2035398230088497) internal successors, (136), 116 states have internal predecessors, (136), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:43,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2023-04-01 06:37:43,665 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 54 [2023-04-01 06:37:43,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:43,665 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2023-04-01 06:37:43,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:43,666 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2023-04-01 06:37:43,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 06:37:43,666 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:43,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:37:43,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 06:37:43,666 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:43,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:43,667 INFO L85 PathProgramCache]: Analyzing trace with hash 875261936, now seen corresponding path program 1 times [2023-04-01 06:37:43,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:43,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13668992] [2023-04-01 06:37:43,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:43,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:43,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:43,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13668992] [2023-04-01 06:37:43,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13668992] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:43,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:43,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 06:37:43,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130584750] [2023-04-01 06:37:43,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:43,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 06:37:43,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:43,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 06:37:43,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:37:43,827 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:44,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:44,062 INFO L93 Difference]: Finished difference Result 176 states and 205 transitions. [2023-04-01 06:37:44,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 06:37:44,062 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-04-01 06:37:44,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:44,063 INFO L225 Difference]: With dead ends: 176 [2023-04-01 06:37:44,063 INFO L226 Difference]: Without dead ends: 169 [2023-04-01 06:37:44,063 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 [2023-04-01 06:37:44,064 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 381 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:44,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 458 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:37:44,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-04-01 06:37:44,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 120. [2023-04-01 06:37:44,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 116 states have internal predecessors, (134), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:44,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 137 transitions. [2023-04-01 06:37:44,084 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 137 transitions. Word has length 54 [2023-04-01 06:37:44,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:44,084 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 137 transitions. [2023-04-01 06:37:44,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:44,085 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 137 transitions. [2023-04-01 06:37:44,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 06:37:44,085 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:44,085 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:37:44,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 06:37:44,085 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:44,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:44,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1670148679, now seen corresponding path program 1 times [2023-04-01 06:37:44,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:44,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298059888] [2023-04-01 06:37:44,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:44,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:44,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:44,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298059888] [2023-04-01 06:37:44,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298059888] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:44,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:44,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 06:37:44,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000599307] [2023-04-01 06:37:44,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:44,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 06:37:44,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:44,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 06:37:44,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-01 06:37:44,423 INFO L87 Difference]: Start difference. First operand 120 states and 137 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) [2023-04-01 06:37:44,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:44,924 INFO L93 Difference]: Finished difference Result 261 states and 311 transitions. [2023-04-01 06:37:44,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 06:37:44,924 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 [2023-04-01 06:37:44,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:44,925 INFO L225 Difference]: With dead ends: 261 [2023-04-01 06:37:44,925 INFO L226 Difference]: Without dead ends: 241 [2023-04-01 06:37:44,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-04-01 06:37:44,926 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 498 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:44,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 1383 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:37:44,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-04-01 06:37:44,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 94. [2023-04-01 06:37:44,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.1685393258426966) internal successors, (104), 90 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:44,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2023-04-01 06:37:44,944 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 54 [2023-04-01 06:37:44,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:44,945 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2023-04-01 06:37:44,945 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) [2023-04-01 06:37:44,945 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2023-04-01 06:37:44,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 06:37:44,945 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:44,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:37:44,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 06:37:44,945 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr5ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:44,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:44,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1712596189, now seen corresponding path program 1 times [2023-04-01 06:37:44,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:44,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766622632] [2023-04-01 06:37:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:44,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:45,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:45,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766622632] [2023-04-01 06:37:45,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766622632] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:45,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:45,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-01 06:37:45,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457689350] [2023-04-01 06:37:45,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:45,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 06:37:45,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:45,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 06:37:45,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2023-04-01 06:37:45,424 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:46,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:46,344 INFO L93 Difference]: Finished difference Result 311 states and 376 transitions. [2023-04-01 06:37:46,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 06:37:46,345 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 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 56 [2023-04-01 06:37:46,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:46,346 INFO L225 Difference]: With dead ends: 311 [2023-04-01 06:37:46,346 INFO L226 Difference]: Without dead ends: 305 [2023-04-01 06:37:46,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2023-04-01 06:37:46,347 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 800 mSDsluCounter, 1886 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 2106 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:46,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [800 Valid, 2106 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 06:37:46,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-04-01 06:37:46,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 105. [2023-04-01 06:37:46,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.18) internal successors, (118), 101 states have internal predecessors, (118), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:46,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2023-04-01 06:37:46,388 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 56 [2023-04-01 06:37:46,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:46,388 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2023-04-01 06:37:46,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:46,388 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2023-04-01 06:37:46,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 06:37:46,388 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:46,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:37:46,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 06:37:46,389 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr5ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:46,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:46,389 INFO L85 PathProgramCache]: Analyzing trace with hash -986425228, now seen corresponding path program 1 times [2023-04-01 06:37:46,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:46,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913409536] [2023-04-01 06:37:46,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:46,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:47,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:47,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913409536] [2023-04-01 06:37:47,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913409536] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:47,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:47,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-01 06:37:47,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566137906] [2023-04-01 06:37:47,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:47,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 06:37:47,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:47,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 06:37:47,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2023-04-01 06:37:47,151 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:49,116 INFO L93 Difference]: Finished difference Result 400 states and 492 transitions. [2023-04-01 06:37:49,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 06:37:49,116 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-01 06:37:49,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:49,118 INFO L225 Difference]: With dead ends: 400 [2023-04-01 06:37:49,118 INFO L226 Difference]: Without dead ends: 394 [2023-04-01 06:37:49,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=238, Invalid=1094, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 06:37:49,119 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 845 mSDsluCounter, 3264 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 3626 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:49,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 3626 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 06:37:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2023-04-01 06:37:49,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 106. [2023-04-01 06:37:49,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 102 states have internal predecessors, (119), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:49,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2023-04-01 06:37:49,146 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 57 [2023-04-01 06:37:49,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:49,146 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2023-04-01 06:37:49,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:49,146 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2023-04-01 06:37:49,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 06:37:49,147 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:49,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:37:49,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 06:37:49,147 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr5ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:49,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:49,147 INFO L85 PathProgramCache]: Analyzing trace with hash -299864679, now seen corresponding path program 1 times [2023-04-01 06:37:49,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:49,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491977521] [2023-04-01 06:37:49,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:49,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:49,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:49,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491977521] [2023-04-01 06:37:49,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491977521] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:49,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:49,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 06:37:49,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918653242] [2023-04-01 06:37:49,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:49,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 06:37:49,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:49,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 06:37:49,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-04-01 06:37:49,444 INFO L87 Difference]: Start difference. First operand 106 states and 122 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) [2023-04-01 06:37:50,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:50,018 INFO L93 Difference]: Finished difference Result 223 states and 271 transitions. [2023-04-01 06:37:50,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 06:37:50,019 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 [2023-04-01 06:37:50,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:50,020 INFO L225 Difference]: With dead ends: 223 [2023-04-01 06:37:50,020 INFO L226 Difference]: Without dead ends: 217 [2023-04-01 06:37:50,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2023-04-01 06:37:50,021 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 473 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:50,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 852 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:37:50,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-04-01 06:37:50,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 88. [2023-04-01 06:37:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 84 states have (on average 1.1666666666666667) internal successors, (98), 84 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:50,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2023-04-01 06:37:50,047 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 57 [2023-04-01 06:37:50,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:50,047 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2023-04-01 06:37:50,047 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) [2023-04-01 06:37:50,047 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2023-04-01 06:37:50,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 06:37:50,047 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:50,047 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] [2023-04-01 06:37:50,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 06:37:50,048 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:50,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:50,048 INFO L85 PathProgramCache]: Analyzing trace with hash -89887696, now seen corresponding path program 1 times [2023-04-01 06:37:50,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:50,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286315872] [2023-04-01 06:37:50,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:50,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:50,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:50,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286315872] [2023-04-01 06:37:50,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286315872] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:50,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:50,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:37:50,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19900669] [2023-04-01 06:37:50,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:50,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:37:50,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:50,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:37:50,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:37:50,111 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:50,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:50,168 INFO L93 Difference]: Finished difference Result 144 states and 175 transitions. [2023-04-01 06:37:50,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:37:50,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 67 [2023-04-01 06:37:50,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:50,169 INFO L225 Difference]: With dead ends: 144 [2023-04-01 06:37:50,169 INFO L226 Difference]: Without dead ends: 116 [2023-04-01 06:37:50,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:37:50,170 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 43 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:50,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 186 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:37:50,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-04-01 06:37:50,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2023-04-01 06:37:50,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 106 states have internal predecessors, (128), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2023-04-01 06:37:50,212 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 67 [2023-04-01 06:37:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:50,213 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2023-04-01 06:37:50,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:50,213 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2023-04-01 06:37:50,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 06:37:50,213 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:50,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:37:50,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 06:37:50,213 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:50,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:50,214 INFO L85 PathProgramCache]: Analyzing trace with hash -412281552, now seen corresponding path program 1 times [2023-04-01 06:37:50,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:50,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815545761] [2023-04-01 06:37:50,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:50,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:50,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:50,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815545761] [2023-04-01 06:37:50,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815545761] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:50,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:50,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:37:50,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116350983] [2023-04-01 06:37:50,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:50,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:37:50,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:50,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:37:50,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:37:50,279 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:50,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:50,363 INFO L93 Difference]: Finished difference Result 210 states and 265 transitions. [2023-04-01 06:37:50,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:37:50,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 70 [2023-04-01 06:37:50,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:50,364 INFO L225 Difference]: With dead ends: 210 [2023-04-01 06:37:50,365 INFO L226 Difference]: Without dead ends: 160 [2023-04-01 06:37:50,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:37:50,365 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 36 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:50,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 186 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:37:50,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-04-01 06:37:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2023-04-01 06:37:50,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 146 states have (on average 1.2465753424657535) internal successors, (182), 146 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) [2023-04-01 06:37:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 185 transitions. [2023-04-01 06:37:50,435 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 185 transitions. Word has length 70 [2023-04-01 06:37:50,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:50,435 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 185 transitions. [2023-04-01 06:37:50,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:50,435 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 185 transitions. [2023-04-01 06:37:50,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 06:37:50,436 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:50,436 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:37:50,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 06:37:50,436 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:50,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:50,436 INFO L85 PathProgramCache]: Analyzing trace with hash -847085603, now seen corresponding path program 1 times [2023-04-01 06:37:50,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:50,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64540006] [2023-04-01 06:37:50,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:50,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:50,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:50,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64540006] [2023-04-01 06:37:50,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64540006] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:50,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:50,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:37:50,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720341280] [2023-04-01 06:37:50,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:50,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:37:50,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:50,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:37:50,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:37:50,497 INFO L87 Difference]: Start difference. First operand 150 states and 185 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:50,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:50,631 INFO L93 Difference]: Finished difference Result 330 states and 427 transitions. [2023-04-01 06:37:50,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:37:50,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 73 [2023-04-01 06:37:50,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:50,633 INFO L225 Difference]: With dead ends: 330 [2023-04-01 06:37:50,633 INFO L226 Difference]: Without dead ends: 240 [2023-04-01 06:37:50,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:37:50,633 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 26 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:50,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 186 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:37:50,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-01 06:37:50,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 222. [2023-04-01 06:37:50,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 218 states have (on average 1.275229357798165) internal successors, (278), 218 states have internal predecessors, (278), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:50,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 281 transitions. [2023-04-01 06:37:50,755 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 281 transitions. Word has length 73 [2023-04-01 06:37:50,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:50,755 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 281 transitions. [2023-04-01 06:37:50,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:50,755 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 281 transitions. [2023-04-01 06:37:50,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-01 06:37:50,755 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:50,755 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] [2023-04-01 06:37:50,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 06:37:50,756 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:50,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:50,756 INFO L85 PathProgramCache]: Analyzing trace with hash 695497487, now seen corresponding path program 1 times [2023-04-01 06:37:50,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:50,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422281417] [2023-04-01 06:37:50,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:50,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:50,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:50,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422281417] [2023-04-01 06:37:50,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422281417] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:50,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:50,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:37:50,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972433710] [2023-04-01 06:37:50,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:50,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:37:50,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:50,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:37:50,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:37:50,810 INFO L87 Difference]: Start difference. First operand 222 states and 281 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:51,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:51,239 INFO L93 Difference]: Finished difference Result 742 states and 963 transitions. [2023-04-01 06:37:51,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 06:37:51,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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 76 [2023-04-01 06:37:51,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:51,241 INFO L225 Difference]: With dead ends: 742 [2023-04-01 06:37:51,242 INFO L226 Difference]: Without dead ends: 580 [2023-04-01 06:37:51,242 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 [2023-04-01 06:37:51,242 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 284 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:51,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 368 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:37:51,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2023-04-01 06:37:51,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 314. [2023-04-01 06:37:51,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 310 states have (on average 1.270967741935484) internal successors, (394), 310 states have internal predecessors, (394), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:51,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 397 transitions. [2023-04-01 06:37:51,433 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 397 transitions. Word has length 76 [2023-04-01 06:37:51,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:51,433 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 397 transitions. [2023-04-01 06:37:51,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:51,433 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 397 transitions. [2023-04-01 06:37:51,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 06:37:51,434 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:51,434 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] [2023-04-01 06:37:51,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-01 06:37:51,434 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:51,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:51,434 INFO L85 PathProgramCache]: Analyzing trace with hash 2098262464, now seen corresponding path program 1 times [2023-04-01 06:37:51,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:51,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550497334] [2023-04-01 06:37:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:51,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:51,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:51,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550497334] [2023-04-01 06:37:51,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550497334] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:51,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:51,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:37:51,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167178035] [2023-04-01 06:37:51,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:51,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:37:51,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:51,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:37:51,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:37:51,473 INFO L87 Difference]: Start difference. First operand 314 states and 397 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:51,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:51,820 INFO L93 Difference]: Finished difference Result 670 states and 863 transitions. [2023-04-01 06:37:51,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:37:51,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 78 [2023-04-01 06:37:51,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:51,822 INFO L225 Difference]: With dead ends: 670 [2023-04-01 06:37:51,822 INFO L226 Difference]: Without dead ends: 416 [2023-04-01 06:37:51,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:37:51,823 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 51 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:51,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 144 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:37:51,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2023-04-01 06:37:52,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 414. [2023-04-01 06:37:52,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 410 states have (on average 1.2707317073170732) internal successors, (521), 410 states have internal predecessors, (521), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:52,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 524 transitions. [2023-04-01 06:37:52,129 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 524 transitions. Word has length 78 [2023-04-01 06:37:52,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:52,129 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 524 transitions. [2023-04-01 06:37:52,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:52,129 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 524 transitions. [2023-04-01 06:37:52,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 06:37:52,132 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:52,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:37:52,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-01 06:37:52,132 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:52,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:52,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2045621767, now seen corresponding path program 1 times [2023-04-01 06:37:52,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:52,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893786589] [2023-04-01 06:37:52,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:52,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:52,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:52,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893786589] [2023-04-01 06:37:52,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893786589] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:52,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:52,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:37:52,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458051842] [2023-04-01 06:37:52,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:52,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:37:52,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:52,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:37:52,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:37:52,237 INFO L87 Difference]: Start difference. First operand 414 states and 524 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:52,611 INFO L93 Difference]: Finished difference Result 770 states and 985 transitions. [2023-04-01 06:37:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:37:52,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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 78 [2023-04-01 06:37:52,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:52,612 INFO L225 Difference]: With dead ends: 770 [2023-04-01 06:37:52,612 INFO L226 Difference]: Without dead ends: 416 [2023-04-01 06:37:52,613 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 [2023-04-01 06:37:52,614 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 72 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:52,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 158 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:37:52,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2023-04-01 06:37:52,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 414. [2023-04-01 06:37:52,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 410 states have (on average 1.2682926829268293) internal successors, (520), 410 states have internal predecessors, (520), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:52,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 523 transitions. [2023-04-01 06:37:52,938 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 523 transitions. Word has length 78 [2023-04-01 06:37:52,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:52,938 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 523 transitions. [2023-04-01 06:37:52,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 523 transitions. [2023-04-01 06:37:52,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 06:37:52,939 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:52,939 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] [2023-04-01 06:37:52,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-01 06:37:52,939 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:52,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:52,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1282646317, now seen corresponding path program 1 times [2023-04-01 06:37:52,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:52,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317598423] [2023-04-01 06:37:52,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:52,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:53,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:53,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317598423] [2023-04-01 06:37:53,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317598423] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:53,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:53,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 06:37:53,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141945938] [2023-04-01 06:37:53,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:53,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 06:37:53,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:53,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 06:37:53,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:37:53,094 INFO L87 Difference]: Start difference. First operand 414 states and 523 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2023-04-01 06:37:53,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:53,630 INFO L93 Difference]: Finished difference Result 560 states and 698 transitions. [2023-04-01 06:37:53,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 06:37:53,631 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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 [2023-04-01 06:37:53,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:53,633 INFO L225 Difference]: With dead ends: 560 [2023-04-01 06:37:53,633 INFO L226 Difference]: Without dead ends: 558 [2023-04-01 06:37:53,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-04-01 06:37:53,633 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 207 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:53,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 590 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:37:53,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2023-04-01 06:37:53,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 414. [2023-04-01 06:37:53,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 410 states have (on average 1.248780487804878) internal successors, (512), 410 states have internal predecessors, (512), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:53,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 515 transitions. [2023-04-01 06:37:53,952 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 515 transitions. Word has length 79 [2023-04-01 06:37:53,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:53,952 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 515 transitions. [2023-04-01 06:37:53,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2023-04-01 06:37:53,952 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 515 transitions. [2023-04-01 06:37:53,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 06:37:53,953 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:53,953 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] [2023-04-01 06:37:53,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-01 06:37:53,953 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:53,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:53,954 INFO L85 PathProgramCache]: Analyzing trace with hash 581958908, now seen corresponding path program 1 times [2023-04-01 06:37:53,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:53,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865423472] [2023-04-01 06:37:53,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:53,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 06:37:54,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:54,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865423472] [2023-04-01 06:37:54,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865423472] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:54,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:54,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 06:37:54,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561317753] [2023-04-01 06:37:54,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:54,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 06:37:54,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:54,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 06:37:54,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:37:54,143 INFO L87 Difference]: Start difference. First operand 414 states and 515 transitions. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 8 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:54,833 INFO L93 Difference]: Finished difference Result 1011 states and 1269 transitions. [2023-04-01 06:37:54,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 06:37:54,834 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 8 states have internal predecessors, (81), 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 90 [2023-04-01 06:37:54,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:54,835 INFO L225 Difference]: With dead ends: 1011 [2023-04-01 06:37:54,835 INFO L226 Difference]: Without dead ends: 651 [2023-04-01 06:37:54,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2023-04-01 06:37:54,836 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 340 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:54,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 327 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:37:54,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2023-04-01 06:37:55,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 414. [2023-04-01 06:37:55,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 410 states have (on average 1.2463414634146341) internal successors, (511), 410 states have internal predecessors, (511), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 514 transitions. [2023-04-01 06:37:55,117 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 514 transitions. Word has length 90 [2023-04-01 06:37:55,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:55,117 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 514 transitions. [2023-04-01 06:37:55,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 8 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:55,117 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 514 transitions. [2023-04-01 06:37:55,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 06:37:55,117 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:55,118 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] [2023-04-01 06:37:55,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-01 06:37:55,118 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:37:55,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:55,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1425985569, now seen corresponding path program 1 times [2023-04-01 06:37:55,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:55,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891151773] [2023-04-01 06:37:55,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:55,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:56,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:56,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891151773] [2023-04-01 06:37:56,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891151773] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:37:56,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846673328] [2023-04-01 06:37:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:56,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:37:56,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:37:56,551 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:37:56,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 06:37:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:56,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-01 06:37:56,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:37:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 06:37:58,207 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:37:58,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846673328] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:58,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:37:58,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [24] total 38 [2023-04-01 06:37:58,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618765206] [2023-04-01 06:37:58,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:58,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 06:37:58,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:58,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 06:37:58,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1279, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 06:37:58,209 INFO L87 Difference]: Start difference. First operand 414 states and 514 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:59,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:59,958 INFO L93 Difference]: Finished difference Result 1477 states and 1850 transitions. [2023-04-01 06:37:59,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 06:37:59,958 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 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 92 [2023-04-01 06:37:59,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:59,961 INFO L225 Difference]: With dead ends: 1477 [2023-04-01 06:37:59,962 INFO L226 Difference]: Without dead ends: 1116 [2023-04-01 06:37:59,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=188, Invalid=1882, Unknown=0, NotChecked=0, Total=2070 [2023-04-01 06:37:59,964 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 511 mSDsluCounter, 1402 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:59,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 1586 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 06:37:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2023-04-01 06:38:00,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 424. [2023-04-01 06:38:00,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 420 states have (on average 1.2428571428571429) internal successors, (522), 420 states have internal predecessors, (522), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:38:00,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 525 transitions. [2023-04-01 06:38:00,293 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 525 transitions. Word has length 92 [2023-04-01 06:38:00,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:38:00,294 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 525 transitions. [2023-04-01 06:38:00,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:38:00,294 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 525 transitions. [2023-04-01 06:38:00,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-04-01 06:38:00,294 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:38:00,294 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] [2023-04-01 06:38:00,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 06:38:00,503 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,SelfDestructingSolverStorable22 [2023-04-01 06:38:00,506 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 06:38:00,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:38:00,506 INFO L85 PathProgramCache]: Analyzing trace with hash 373172829, now seen corresponding path program 1 times [2023-04-01 06:38:00,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:38:00,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967423122] [2023-04-01 06:38:00,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:38:00,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:38:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:38:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:38:02,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:38:02,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967423122] [2023-04-01 06:38:02,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967423122] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:38:02,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445970253] [2023-04-01 06:38:02,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:38:02,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:38:02,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:38:02,203 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:38:02,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 06:38:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:38:02,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 40 conjunts are in the unsatisfiable core [2023-04-01 06:38:02,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:38:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:38:05,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 06:38:19,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:38:19,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445970253] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 06:38:19,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [557789816] [2023-04-01 06:38:19,861 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2023-04-01 06:38:19,861 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 06:38:19,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 06:38:19,867 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 06:38:19,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 06:38:20,379 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 168 for LOIs [2023-04-01 06:38:28,577 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 16