/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem13_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:02:04,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:02:04,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:02:04,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:02:04,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:02:04,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:02:04,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:02:04,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:02:04,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:02:04,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:02:04,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:02:04,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:02:04,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:02:04,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:02:04,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:02:04,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:02:04,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:02:04,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:02:04,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:02:04,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:02:04,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:02:04,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:02:04,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:02:04,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:02:04,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:02:04,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:02:04,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:02:04,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:02:04,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:02:04,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:02:04,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:02:04,077 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:02:04,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:02:04,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:02:04,078 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:02:04,078 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:02:04,079 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:02:04,079 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:02:04,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:02:04,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:02:04,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:02:04,086 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 [2023-03-31 22:02:04,112 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:02:04,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:02:04,113 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:02:04,113 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:02:04,113 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:02:04,113 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:02:04,113 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:02:04,113 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:02:04,113 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:02:04,114 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:02:04,114 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:02:04,114 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:02:04,114 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:02:04,114 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:02:04,114 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:02:04,114 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:02:04,114 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:02:04,114 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:02:04,115 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:02:04,115 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:02:04,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:02:04,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:02:04,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:02:04,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:02:04,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:02:04,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:02:04,115 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:02:04,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:02:04,115 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:02:04,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:02:04,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:02:04,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:02:04,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:02:04,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:02:04,116 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:02:04,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:02:04,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:02:04,116 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:02:04,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:02:04,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:02:04,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:02:04,124 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:02:04,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:02:04,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:02:04,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:02:04,350 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:02:04,350 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:02:04,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label03.c [2023-03-31 22:02:05,378 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:02:05,830 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:02:05,831 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label03.c [2023-03-31 22:02:05,853 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9d1b4200/ea71bdb39f4c4b9aa13063448905730e/FLAG29c0841f8 [2023-03-31 22:02:05,868 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9d1b4200/ea71bdb39f4c4b9aa13063448905730e [2023-03-31 22:02:05,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:02:05,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:02:05,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:02:05,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:02:05,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:02:05,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:02:05" (1/1) ... [2023-03-31 22:02:05,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76d2fd43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:05, skipping insertion in model container [2023-03-31 22:02:05,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:02:05" (1/1) ... [2023-03-31 22:02:05,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:02:05,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:02:06,273 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/eca-rers2012/Problem13_label03.c[5036,5049] [2023-03-31 22:02:06,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:02:07,004 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:02:07,022 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/eca-rers2012/Problem13_label03.c[5036,5049] [2023-03-31 22:02:07,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:02:07,435 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:02:07,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:07 WrapperNode [2023-03-31 22:02:07,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:02:07,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:02:07,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:02:07,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:02:07,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:07" (1/1) ... [2023-03-31 22:02:07,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:07" (1/1) ... [2023-03-31 22:02:07,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:07" (1/1) ... [2023-03-31 22:02:07,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:07" (1/1) ... [2023-03-31 22:02:07,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:07" (1/1) ... [2023-03-31 22:02:07,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:07" (1/1) ... [2023-03-31 22:02:07,707 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:07" (1/1) ... [2023-03-31 22:02:07,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:07" (1/1) ... [2023-03-31 22:02:07,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:02:07,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:02:07,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:02:07,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:02:07,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:07" (1/1) ... [2023-03-31 22:02:07,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:02:07,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:02:07,846 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) [2023-03-31 22:02:07,917 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 [2023-03-31 22:02:07,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:02:07,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:02:07,931 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:02:07,932 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:02:07,932 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:02:07,932 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:02:07,932 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:02:07,932 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:02:07,932 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:02:07,932 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:02:07,932 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:02:07,932 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:02:07,932 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:02:07,932 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:02:07,932 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:02:07,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:02:07,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:02:07,933 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:02:07,933 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:02:07,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:02:07,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:02:07,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:02:07,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:02:07,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:02:07,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:02:08,023 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:02:08,025 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:02:11,887 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:02:14,092 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:02:14,092 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:02:14,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:02:14 BoogieIcfgContainer [2023-03-31 22:02:14,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:02:14,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:02:14,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:02:14,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:02:14,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:02:05" (1/3) ... [2023-03-31 22:02:14,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8ae675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:02:14, skipping insertion in model container [2023-03-31 22:02:14,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:02:07" (2/3) ... [2023-03-31 22:02:14,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8ae675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:02:14, skipping insertion in model container [2023-03-31 22:02:14,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:02:14" (3/3) ... [2023-03-31 22:02:14,101 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label03.c [2023-03-31 22:02:14,113 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:02:14,113 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:02:14,156 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:02:14,161 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;@27bf9e0d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:02:14,162 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:02:14,169 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 22:02:14,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:02:14,175 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:02:14,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:02:14,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:02:14,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:02:14,181 INFO L85 PathProgramCache]: Analyzing trace with hash -134419435, now seen corresponding path program 1 times [2023-03-31 22:02:14,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:02:14,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255006001] [2023-03-31 22:02:14,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:14,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:02:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:02:14,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:02:14,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255006001] [2023-03-31 22:02:14,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255006001] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:02:14,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:02:14,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:02:14,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729253178] [2023-03-31 22:02:14,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:02:14,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:02:14,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:02:14,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:02:14,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:02:14,555 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:02:17,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:02:17,588 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-03-31 22:02:17,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:02:17,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:02:17,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:02:17,606 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 22:02:17,606 INFO L226 Difference]: Without dead ends: 1371 [2023-03-31 22:02:17,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:02:17,616 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 757 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 3032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:02:17,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 138 Invalid, 3032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [975 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-03-31 22:02:17,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-03-31 22:02:17,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1366. [2023-03-31 22:02:17,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1348 states have (on average 1.9117210682492582) internal successors, (2577), 1348 states have internal predecessors, (2577), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-03-31 22:02:17,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 2600 transitions. [2023-03-31 22:02:17,705 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 2600 transitions. Word has length 11 [2023-03-31 22:02:17,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:02:17,705 INFO L495 AbstractCegarLoop]: Abstraction has 1366 states and 2600 transitions. [2023-03-31 22:02:17,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:02:17,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 2600 transitions. [2023-03-31 22:02:17,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 22:02:17,707 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:02:17,707 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:02:17,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:02:17,707 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:02:17,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:02:17,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1261379059, now seen corresponding path program 1 times [2023-03-31 22:02:17,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:02:17,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898658438] [2023-03-31 22:02:17,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:17,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:02:17,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:02:17,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:02:17,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898658438] [2023-03-31 22:02:17,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898658438] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:02:17,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:02:17,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:02:17,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489239176] [2023-03-31 22:02:17,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:02:17,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:02:17,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:02:17,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:02:17,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:02:17,951 INFO L87 Difference]: Start difference. First operand 1366 states and 2600 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:02:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:02:22,178 INFO L93 Difference]: Finished difference Result 4172 states and 7968 transitions. [2023-03-31 22:02:22,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:02:22,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-03-31 22:02:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:02:22,189 INFO L225 Difference]: With dead ends: 4172 [2023-03-31 22:02:22,189 INFO L226 Difference]: Without dead ends: 2811 [2023-03-31 22:02:22,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:02:22,193 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 2226 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 4443 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2226 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 5075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 4443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:02:22,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2226 Valid, 134 Invalid, 5075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 4443 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-03-31 22:02:22,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2023-03-31 22:02:22,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 2750. [2023-03-31 22:02:22,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2750 states, 2707 states have (on average 1.7960842260805319) internal successors, (4862), 2712 states have internal predecessors, (4862), 15 states have call successors, (15), 15 states have call predecessors, (15), 27 states have return successors, (74), 22 states have call predecessors, (74), 14 states have call successors, (74) [2023-03-31 22:02:22,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 4951 transitions. [2023-03-31 22:02:22,270 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 4951 transitions. Word has length 26 [2023-03-31 22:02:22,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:02:22,270 INFO L495 AbstractCegarLoop]: Abstraction has 2750 states and 4951 transitions. [2023-03-31 22:02:22,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:02:22,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 4951 transitions. [2023-03-31 22:02:22,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 22:02:22,272 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:02:22,272 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:02:22,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:02:22,272 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:02:22,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:02:22,274 INFO L85 PathProgramCache]: Analyzing trace with hash -121163206, now seen corresponding path program 1 times [2023-03-31 22:02:22,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:02:22,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754194554] [2023-03-31 22:02:22,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:22,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:02:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:02:22,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:02:22,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754194554] [2023-03-31 22:02:22,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754194554] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:02:22,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:02:22,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:02:22,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131527025] [2023-03-31 22:02:22,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:02:22,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:02:22,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:02:22,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:02:22,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:02:22,435 INFO L87 Difference]: Start difference. First operand 2750 states and 4951 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:02:26,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:02:26,568 INFO L93 Difference]: Finished difference Result 8308 states and 15116 transitions. [2023-03-31 22:02:26,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:02:26,581 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-03-31 22:02:26,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:02:26,606 INFO L225 Difference]: With dead ends: 8308 [2023-03-31 22:02:26,606 INFO L226 Difference]: Without dead ends: 5563 [2023-03-31 22:02:26,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:02:26,617 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 2290 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 4058 mSolverCounterSat, 1109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2290 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 5167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1109 IncrementalHoareTripleChecker+Valid, 4058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:02:26,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2290 Valid, 127 Invalid, 5167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1109 Valid, 4058 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-03-31 22:02:26,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5563 states. [2023-03-31 22:02:26,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5563 to 5523. [2023-03-31 22:02:26,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5523 states, 5422 states have (on average 1.550165990409443) internal successors, (8405), 5439 states have internal predecessors, (8405), 27 states have call successors, (27), 27 states have call predecessors, (27), 73 states have return successors, (304), 56 states have call predecessors, (304), 26 states have call successors, (304) [2023-03-31 22:02:26,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5523 states to 5523 states and 8736 transitions. [2023-03-31 22:02:26,748 INFO L78 Accepts]: Start accepts. Automaton has 5523 states and 8736 transitions. Word has length 27 [2023-03-31 22:02:26,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:02:26,749 INFO L495 AbstractCegarLoop]: Abstraction has 5523 states and 8736 transitions. [2023-03-31 22:02:26,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:02:26,749 INFO L276 IsEmpty]: Start isEmpty. Operand 5523 states and 8736 transitions. [2023-03-31 22:02:26,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-03-31 22:02:26,751 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:02:26,751 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:02:26,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:02:26,751 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:02:26,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:02:26,758 INFO L85 PathProgramCache]: Analyzing trace with hash 17806204, now seen corresponding path program 1 times [2023-03-31 22:02:26,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:02:26,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445722521] [2023-03-31 22:02:26,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:26,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:02:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:02:26,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:02:26,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445722521] [2023-03-31 22:02:26,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445722521] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:02:26,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302762624] [2023-03-31 22:02:26,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:26,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:02:26,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:02:26,912 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) [2023-03-31 22:02:26,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:02:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:27,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:02:27,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:02:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:02:27,177 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:02:27,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302762624] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:02:27,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:02:27,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:02:27,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977261326] [2023-03-31 22:02:27,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:02:27,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:02:27,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:02:27,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:02:27,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:02:27,179 INFO L87 Difference]: Start difference. First operand 5523 states and 8736 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:02:30,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:02:30,115 INFO L93 Difference]: Finished difference Result 16772 states and 27414 transitions. [2023-03-31 22:02:30,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:02:30,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2023-03-31 22:02:30,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:02:30,151 INFO L225 Difference]: With dead ends: 16772 [2023-03-31 22:02:30,152 INFO L226 Difference]: Without dead ends: 11254 [2023-03-31 22:02:30,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-03-31 22:02:30,166 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 2443 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 3409 mSolverCounterSat, 1492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2443 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 4901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1492 IncrementalHoareTripleChecker+Valid, 3409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:02:30,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2443 Valid, 83 Invalid, 4901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1492 Valid, 3409 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-03-31 22:02:30,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11254 states. [2023-03-31 22:02:30,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11254 to 11047. [2023-03-31 22:02:30,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11047 states, 10786 states have (on average 1.3714073799369553) internal successors, (14792), 10848 states have internal predecessors, (14792), 51 states have call successors, (51), 51 states have call predecessors, (51), 209 states have return successors, (1155), 147 states have call predecessors, (1155), 50 states have call successors, (1155) [2023-03-31 22:02:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11047 states to 11047 states and 15998 transitions. [2023-03-31 22:02:30,434 INFO L78 Accepts]: Start accepts. Automaton has 11047 states and 15998 transitions. Word has length 36 [2023-03-31 22:02:30,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:02:30,434 INFO L495 AbstractCegarLoop]: Abstraction has 11047 states and 15998 transitions. [2023-03-31 22:02:30,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:02:30,434 INFO L276 IsEmpty]: Start isEmpty. Operand 11047 states and 15998 transitions. [2023-03-31 22:02:30,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-31 22:02:30,440 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:02:30,440 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:02:30,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 22:02:30,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:02:30,646 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:02:30,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:02:30,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1569966171, now seen corresponding path program 1 times [2023-03-31 22:02:30,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:02:30,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651733990] [2023-03-31 22:02:30,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:30,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:02:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:31,024 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:02:31,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:02:31,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651733990] [2023-03-31 22:02:31,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651733990] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:02:31,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600678863] [2023-03-31 22:02:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:31,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:02:31,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:02:31,028 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) [2023-03-31 22:02:31,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:02:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:31,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:02:31,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:02:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:02:31,173 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:02:31,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600678863] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:02:31,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:02:31,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:02:31,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167874755] [2023-03-31 22:02:31,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:02:31,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:02:31,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:02:31,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:02:31,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:02:31,174 INFO L87 Difference]: Start difference. First operand 11047 states and 15998 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:02:34,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:02:34,554 INFO L93 Difference]: Finished difference Result 27779 states and 41314 transitions. [2023-03-31 22:02:34,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:02:34,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2023-03-31 22:02:34,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:02:34,615 INFO L225 Difference]: With dead ends: 27779 [2023-03-31 22:02:34,616 INFO L226 Difference]: Without dead ends: 16737 [2023-03-31 22:02:34,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:02:34,641 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2041 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 4473 mSolverCounterSat, 971 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2041 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 5444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 971 IncrementalHoareTripleChecker+Valid, 4473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:02:34,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2041 Valid, 104 Invalid, 5444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [971 Valid, 4473 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-03-31 22:02:34,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16737 states. [2023-03-31 22:02:35,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16737 to 15990. [2023-03-31 22:02:35,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15990 states, 15538 states have (on average 1.2894194877075558) internal successors, (20035), 15659 states have internal predecessors, (20035), 73 states have call successors, (73), 73 states have call predecessors, (73), 378 states have return successors, (2585), 257 states have call predecessors, (2585), 72 states have call successors, (2585) [2023-03-31 22:02:35,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15990 states to 15990 states and 22693 transitions. [2023-03-31 22:02:35,103 INFO L78 Accepts]: Start accepts. Automaton has 15990 states and 22693 transitions. Word has length 45 [2023-03-31 22:02:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:02:35,104 INFO L495 AbstractCegarLoop]: Abstraction has 15990 states and 22693 transitions. [2023-03-31 22:02:35,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:02:35,104 INFO L276 IsEmpty]: Start isEmpty. Operand 15990 states and 22693 transitions. [2023-03-31 22:02:35,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-03-31 22:02:35,107 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:02:35,107 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:02:35,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 22:02:35,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:02:35,314 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:02:35,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:02:35,315 INFO L85 PathProgramCache]: Analyzing trace with hash 126891872, now seen corresponding path program 1 times [2023-03-31 22:02:35,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:02:35,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201931319] [2023-03-31 22:02:35,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:35,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:02:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:02:35,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:02:35,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201931319] [2023-03-31 22:02:35,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201931319] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:02:35,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:02:35,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:02:35,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726763035] [2023-03-31 22:02:35,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:02:35,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:02:35,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:02:35,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:02:35,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:02:35,622 INFO L87 Difference]: Start difference. First operand 15990 states and 22693 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:02:39,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:02:39,106 INFO L93 Difference]: Finished difference Result 28743 states and 41645 transitions. [2023-03-31 22:02:39,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:02:39,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2023-03-31 22:02:39,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:02:39,153 INFO L225 Difference]: With dead ends: 28743 [2023-03-31 22:02:39,153 INFO L226 Difference]: Without dead ends: 16373 [2023-03-31 22:02:39,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 22:02:39,179 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2077 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 4338 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2077 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 4905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 4338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:02:39,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2077 Valid, 100 Invalid, 4905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 4338 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-03-31 22:02:39,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16373 states. [2023-03-31 22:02:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16373 to 16302. [2023-03-31 22:02:39,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16302 states, 15832 states have (on average 1.2824027286508337) internal successors, (20303), 15960 states have internal predecessors, (20303), 74 states have call successors, (74), 74 states have call predecessors, (74), 395 states have return successors, (2607), 267 states have call predecessors, (2607), 73 states have call successors, (2607) [2023-03-31 22:02:39,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16302 states to 16302 states and 22984 transitions. [2023-03-31 22:02:39,588 INFO L78 Accepts]: Start accepts. Automaton has 16302 states and 22984 transitions. Word has length 70 [2023-03-31 22:02:39,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:02:39,588 INFO L495 AbstractCegarLoop]: Abstraction has 16302 states and 22984 transitions. [2023-03-31 22:02:39,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:02:39,589 INFO L276 IsEmpty]: Start isEmpty. Operand 16302 states and 22984 transitions. [2023-03-31 22:02:39,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-03-31 22:02:39,590 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:02:39,590 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 22:02:39,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 22:02:39,590 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:02:39,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:02:39,590 INFO L85 PathProgramCache]: Analyzing trace with hash -158953636, now seen corresponding path program 1 times [2023-03-31 22:02:39,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:02:39,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487266137] [2023-03-31 22:02:39,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:39,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:02:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-03-31 22:02:39,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:02:39,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487266137] [2023-03-31 22:02:39,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487266137] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:02:39,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:02:39,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:02:39,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105552835] [2023-03-31 22:02:39,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:02:39,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:02:39,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:02:39,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:02:39,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:02:39,846 INFO L87 Difference]: Start difference. First operand 16302 states and 22984 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:02:43,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:02:43,027 INFO L93 Difference]: Finished difference Result 32412 states and 47998 transitions. [2023-03-31 22:02:43,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:02:43,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 79 [2023-03-31 22:02:43,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:02:43,070 INFO L225 Difference]: With dead ends: 32412 [2023-03-31 22:02:43,071 INFO L226 Difference]: Without dead ends: 19998 [2023-03-31 22:02:43,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:02:43,089 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 717 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 2990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:02:43,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 396 Invalid, 2990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-03-31 22:02:43,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19998 states. [2023-03-31 22:02:43,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19998 to 19329. [2023-03-31 22:02:43,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19329 states, 18811 states have (on average 1.3104034873212482) internal successors, (24650), 18948 states have internal predecessors, (24650), 88 states have call successors, (88), 88 states have call predecessors, (88), 429 states have return successors, (3451), 292 states have call predecessors, (3451), 87 states have call successors, (3451) [2023-03-31 22:02:43,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19329 states to 19329 states and 28189 transitions. [2023-03-31 22:02:43,373 INFO L78 Accepts]: Start accepts. Automaton has 19329 states and 28189 transitions. Word has length 79 [2023-03-31 22:02:43,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:02:43,375 INFO L495 AbstractCegarLoop]: Abstraction has 19329 states and 28189 transitions. [2023-03-31 22:02:43,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:02:43,375 INFO L276 IsEmpty]: Start isEmpty. Operand 19329 states and 28189 transitions. [2023-03-31 22:02:43,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-03-31 22:02:43,380 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:02:43,380 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2023-03-31 22:02:43,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 22:02:43,381 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:02:43,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:02:43,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1808442046, now seen corresponding path program 1 times [2023-03-31 22:02:43,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:02:43,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976670237] [2023-03-31 22:02:43,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:43,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:02:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 41 proven. 12 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-03-31 22:02:43,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:02:43,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976670237] [2023-03-31 22:02:43,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976670237] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:02:43,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131394727] [2023-03-31 22:02:43,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:43,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:02:43,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:02:43,621 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:02:43,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:02:43,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:43,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:02:43,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:02:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-03-31 22:02:43,776 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:02:43,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131394727] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:02:43,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:02:43,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-03-31 22:02:43,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036090766] [2023-03-31 22:02:43,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:02:43,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:02:43,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:02:43,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:02:43,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:02:43,777 INFO L87 Difference]: Start difference. First operand 19329 states and 28189 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:02:46,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:02:46,504 INFO L93 Difference]: Finished difference Result 39557 states and 59151 transitions. [2023-03-31 22:02:46,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:02:46,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 90 [2023-03-31 22:02:46,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:02:46,589 INFO L225 Difference]: With dead ends: 39557 [2023-03-31 22:02:46,589 INFO L226 Difference]: Without dead ends: 20815 [2023-03-31 22:02:46,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:02:46,615 INFO L413 NwaCegarLoop]: 906 mSDtfsCounter, 855 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 2721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:02:46,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 934 Invalid, 2721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 2110 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-03-31 22:02:46,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20815 states. [2023-03-31 22:02:46,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20815 to 20544. [2023-03-31 22:02:46,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20544 states, 20020 states have (on average 1.2737762237762238) internal successors, (25501), 20155 states have internal predecessors, (25501), 94 states have call successors, (94), 94 states have call predecessors, (94), 429 states have return successors, (3277), 294 states have call predecessors, (3277), 93 states have call successors, (3277) [2023-03-31 22:02:46,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20544 states to 20544 states and 28872 transitions. [2023-03-31 22:02:46,907 INFO L78 Accepts]: Start accepts. Automaton has 20544 states and 28872 transitions. Word has length 90 [2023-03-31 22:02:46,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:02:46,908 INFO L495 AbstractCegarLoop]: Abstraction has 20544 states and 28872 transitions. [2023-03-31 22:02:46,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:02:46,911 INFO L276 IsEmpty]: Start isEmpty. Operand 20544 states and 28872 transitions. [2023-03-31 22:02:46,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-03-31 22:02:46,914 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:02:46,914 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:02:46,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 22:02:47,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:02:47,120 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:02:47,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:02:47,121 INFO L85 PathProgramCache]: Analyzing trace with hash 748466577, now seen corresponding path program 1 times [2023-03-31 22:02:47,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:02:47,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231435952] [2023-03-31 22:02:47,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:47,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:02:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:47,313 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 72 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-03-31 22:02:47,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:02:47,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231435952] [2023-03-31 22:02:47,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231435952] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:02:47,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038649013] [2023-03-31 22:02:47,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:47,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:02:47,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:02:47,315 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:02:47,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 22:02:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:47,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 22:02:47,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:02:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-03-31 22:02:47,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:02:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-03-31 22:02:47,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038649013] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 22:02:47,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:02:47,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2023-03-31 22:02:47,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249536015] [2023-03-31 22:02:47,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:02:47,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:02:47,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:02:47,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:02:47,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:02:47,823 INFO L87 Difference]: Start difference. First operand 20544 states and 28872 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:02:51,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:02:51,207 INFO L93 Difference]: Finished difference Result 57351 states and 83996 transitions. [2023-03-31 22:02:51,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:02:51,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 103 [2023-03-31 22:02:51,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:02:51,315 INFO L225 Difference]: With dead ends: 57351 [2023-03-31 22:02:51,316 INFO L226 Difference]: Without dead ends: 37394 [2023-03-31 22:02:51,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 198 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-03-31 22:02:51,359 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2403 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 3556 mSolverCounterSat, 860 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2403 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 4416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 860 IncrementalHoareTripleChecker+Valid, 3556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:02:51,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2403 Valid, 85 Invalid, 4416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [860 Valid, 3556 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-03-31 22:02:51,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37394 states. [2023-03-31 22:02:52,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37394 to 36374. [2023-03-31 22:02:52,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36374 states, 35280 states have (on average 1.2165532879818595) internal successors, (42920), 35616 states have internal predecessors, (42920), 164 states have call successors, (164), 164 states have call predecessors, (164), 929 states have return successors, (7837), 593 states have call predecessors, (7837), 163 states have call successors, (7837) [2023-03-31 22:02:52,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36374 states to 36374 states and 50921 transitions. [2023-03-31 22:02:52,125 INFO L78 Accepts]: Start accepts. Automaton has 36374 states and 50921 transitions. Word has length 103 [2023-03-31 22:02:52,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:02:52,125 INFO L495 AbstractCegarLoop]: Abstraction has 36374 states and 50921 transitions. [2023-03-31 22:02:52,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:02:52,125 INFO L276 IsEmpty]: Start isEmpty. Operand 36374 states and 50921 transitions. [2023-03-31 22:02:52,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-03-31 22:02:52,128 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:02:52,128 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:02:52,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 22:02:52,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:02:52,333 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:02:52,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:02:52,333 INFO L85 PathProgramCache]: Analyzing trace with hash 269336022, now seen corresponding path program 1 times [2023-03-31 22:02:52,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:02:52,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506132792] [2023-03-31 22:02:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:52,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:02:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:02:52,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:02:52,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506132792] [2023-03-31 22:02:52,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506132792] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:02:52,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97810415] [2023-03-31 22:02:52,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:52,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:02:52,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:02:52,435 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:02:52,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 22:02:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:52,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:02:52,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:02:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-03-31 22:02:52,588 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:02:52,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97810415] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:02:52,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:02:52,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-31 22:02:52,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250385371] [2023-03-31 22:02:52,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:02:52,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:02:52,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:02:52,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:02:52,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 22:02:52,589 INFO L87 Difference]: Start difference. First operand 36374 states and 50921 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:02:55,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:02:55,411 INFO L93 Difference]: Finished difference Result 80254 states and 114864 transitions. [2023-03-31 22:02:55,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:02:55,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 122 [2023-03-31 22:02:55,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:02:55,540 INFO L225 Difference]: With dead ends: 80254 [2023-03-31 22:02:55,540 INFO L226 Difference]: Without dead ends: 49650 [2023-03-31 22:02:55,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 22:02:55,573 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 696 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 2399 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 2983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:02:55,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 396 Invalid, 2983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2399 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-03-31 22:02:55,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49650 states. [2023-03-31 22:02:56,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49650 to 41254. [2023-03-31 22:02:56,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41254 states, 40072 states have (on average 1.2088490716709923) internal successors, (48441), 40426 states have internal predecessors, (48441), 190 states have call successors, (190), 190 states have call predecessors, (190), 991 states have return successors, (9313), 637 states have call predecessors, (9313), 189 states have call successors, (9313) [2023-03-31 22:02:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41254 states to 41254 states and 57944 transitions. [2023-03-31 22:02:56,484 INFO L78 Accepts]: Start accepts. Automaton has 41254 states and 57944 transitions. Word has length 122 [2023-03-31 22:02:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:02:56,484 INFO L495 AbstractCegarLoop]: Abstraction has 41254 states and 57944 transitions. [2023-03-31 22:02:56,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:02:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 41254 states and 57944 transitions. [2023-03-31 22:02:56,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2023-03-31 22:02:56,506 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:02:56,507 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:02:56,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 22:02:56,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-31 22:02:56,712 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:02:56,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:02:56,713 INFO L85 PathProgramCache]: Analyzing trace with hash -162930728, now seen corresponding path program 1 times [2023-03-31 22:02:56,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:02:56,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351935547] [2023-03-31 22:02:56,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:56,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:02:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:57,168 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 63 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 22:02:57,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:02:57,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351935547] [2023-03-31 22:02:57,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351935547] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:02:57,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316188093] [2023-03-31 22:02:57,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:02:57,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:02:57,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:02:57,170 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:02:57,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 22:02:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:02:57,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:02:57,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:02:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 22:02:57,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:02:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 22:02:58,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316188093] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:02:58,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [461949162] [2023-03-31 22:02:58,673 INFO L159 IcfgInterpreter]: Started Sifa with 265 locations of interest [2023-03-31 22:02:58,674 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:02:58,677 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:02:58,681 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:02:58,681 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:02:58,773 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-03-31 22:02:59,297 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2023-03-31 22:02:59,385 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7649 conjuctions. This might take some time... [2023-03-31 22:02:59,630 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 99 conjuctions. [2023-03-31 22:02:59,681 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 33 [2023-03-31 22:02:59,771 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7980 conjuctions. This might take some time... [2023-03-31 22:02:59,828 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 77 conjuctions. [2023-03-31 22:03:01,204 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 56 for LOIs [2023-03-31 22:03:01,285 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 29 [2023-03-31 22:03:01,631 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 17800 conjuctions. This might take some time... [2023-03-31 22:03:03,193 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 485 conjuctions.