/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem13_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:09:40,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:09:40,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:09:40,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:09:40,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:09:40,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:09:40,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:09:40,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:09:40,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:09:40,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:09:40,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:09:40,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:09:40,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:09:40,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:09:40,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:09:40,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:09:40,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:09:40,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:09:40,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:09:40,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:09:40,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:09:40,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:09:40,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:09:40,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:09:40,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:09:40,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:09:40,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:09:40,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:09:40,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:09:40,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:09:40,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:09:40,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:09:40,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:09:40,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:09:40,249 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:09:40,249 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:09:40,250 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:09:40,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:09:40,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:09:40,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:09:40,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:09:40,255 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:09:40,285 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:09:40,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:09:40,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:09:40,286 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:09:40,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:09:40,287 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:09:40,287 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:09:40,287 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:09:40,288 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:09:40,288 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:09:40,289 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:09:40,289 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:09:40,289 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:09:40,289 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:09:40,289 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:09:40,290 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:09:40,290 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:09:40,290 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:09:40,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:09:40,291 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:09:40,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:09:40,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:09:40,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:09:40,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:09:40,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:09:40,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:09:40,292 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:09:40,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:09:40,293 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:09:40,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:09:40,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:09:40,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:09:40,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:09:40,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:09:40,294 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:09:40,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:09:40,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:09:40,295 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:09:40,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:09:40,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:09:40,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:09:40,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:09:40,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:09:40,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:09:40,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:09:40,525 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:09:40,525 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:09:40,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label46.c [2023-04-01 10:09:41,694 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:09:42,187 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:09:42,188 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label46.c [2023-04-01 10:09:42,217 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/285014a88/02562a7137664f0eaedba2eb33cdffac/FLAGfd7d80cde [2023-04-01 10:09:42,231 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/285014a88/02562a7137664f0eaedba2eb33cdffac [2023-04-01 10:09:42,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:09:42,235 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:09:42,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:09:42,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:09:42,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:09:42,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:09:42" (1/1) ... [2023-04-01 10:09:42,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aa827c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:42, skipping insertion in model container [2023-04-01 10:09:42,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:09:42" (1/1) ... [2023-04-01 10:09:42,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:09:42,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:09:42,644 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_label46.c[9366,9379] [2023-04-01 10:09:43,422 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:09:43,435 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:09:43,470 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_label46.c[9366,9379] [2023-04-01 10:09:43,969 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:09:43,991 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:09:43,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:43 WrapperNode [2023-04-01 10:09:43,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:09:43,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:09:43,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:09:43,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:09:44,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:43" (1/1) ... [2023-04-01 10:09:44,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:43" (1/1) ... [2023-04-01 10:09:44,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:43" (1/1) ... [2023-04-01 10:09:44,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:43" (1/1) ... [2023-04-01 10:09:44,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:43" (1/1) ... [2023-04-01 10:09:44,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:43" (1/1) ... [2023-04-01 10:09:44,262 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:43" (1/1) ... [2023-04-01 10:09:44,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:43" (1/1) ... [2023-04-01 10:09:44,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:09:44,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:09:44,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:09:44,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:09:44,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:43" (1/1) ... [2023-04-01 10:09:44,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:09:44,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:09:44,351 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 10:09:44,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 10:09:44,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:09:44,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:09:44,399 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:09:44,400 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:09:44,400 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:09:44,400 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:09:44,400 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:09:44,400 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:09:44,400 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:09:44,400 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:09:44,400 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:09:44,400 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:09:44,401 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:09:44,401 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:09:44,401 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:09:44,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:09:44,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:09:44,401 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:09:44,401 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:09:44,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:09:44,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:09:44,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:09:44,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:09:44,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:09:44,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:09:44,554 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:09:44,556 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:09:49,180 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:09:52,179 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:09:52,179 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:09:52,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:09:52 BoogieIcfgContainer [2023-04-01 10:09:52,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:09:52,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:09:52,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:09:52,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:09:52,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:09:42" (1/3) ... [2023-04-01 10:09:52,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9417b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:09:52, skipping insertion in model container [2023-04-01 10:09:52,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:43" (2/3) ... [2023-04-01 10:09:52,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9417b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:09:52, skipping insertion in model container [2023-04-01 10:09:52,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:09:52" (3/3) ... [2023-04-01 10:09:52,192 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label46.c [2023-04-01 10:09:52,212 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:09:52,212 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:09:52,379 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:09:52,385 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;@35efd964, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:09:52,385 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:09:52,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 693 states, 679 states have (on average 1.9779086892488955) internal successors, (1343), 680 states have internal predecessors, (1343), 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) [2023-04-01 10:09:52,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:09:52,398 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:09:52,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:09:52,399 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:09:52,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:09:52,404 INFO L85 PathProgramCache]: Analyzing trace with hash -134410282, now seen corresponding path program 1 times [2023-04-01 10:09:52,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:09:52,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947889925] [2023-04-01 10:09:52,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:09:52,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:09:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:09:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:09:52,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:09:52,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947889925] [2023-04-01 10:09:52,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947889925] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:09:52,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:09:52,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:09:52,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881084806] [2023-04-01 10:09:52,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:09:52,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:09:52,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:09:52,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:09:52,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:09:52,798 INFO L87 Difference]: Start difference. First operand has 693 states, 679 states have (on average 1.9779086892488955) internal successors, (1343), 680 states have internal predecessors, (1343), 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) [2023-04-01 10:09:56,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:09:56,289 INFO L93 Difference]: Finished difference Result 2065 states and 4062 transitions. [2023-04-01 10:09:56,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:09:56,293 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 [2023-04-01 10:09:56,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:09:56,315 INFO L225 Difference]: With dead ends: 2065 [2023-04-01 10:09:56,315 INFO L226 Difference]: Without dead ends: 1369 [2023-04-01 10:09:56,325 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 [2023-04-01 10:09:56,327 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 712 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2341 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 2809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 2341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:09:56,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 215 Invalid, 2809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 2341 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 10:09:56,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2023-04-01 10:09:56,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1365. [2023-04-01 10:09:56,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1347 states have (on average 1.847809948032665) internal successors, (2489), 1347 states have internal predecessors, (2489), 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) [2023-04-01 10:09:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2512 transitions. [2023-04-01 10:09:56,478 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2512 transitions. Word has length 11 [2023-04-01 10:09:56,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:09:56,479 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 2512 transitions. [2023-04-01 10:09:56,479 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) [2023-04-01 10:09:56,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2512 transitions. [2023-04-01 10:09:56,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 10:09:56,481 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:09:56,481 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:09:56,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:09:56,482 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:09:56,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:09:56,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1444713373, now seen corresponding path program 1 times [2023-04-01 10:09:56,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:09:56,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471342564] [2023-04-01 10:09:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:09:56,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:09:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:09:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:09:56,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:09:56,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471342564] [2023-04-01 10:09:56,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471342564] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:09:56,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:09:56,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:09:56,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484395024] [2023-04-01 10:09:56,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:09:56,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:09:56,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:09:56,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:09:56,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:09:56,798 INFO L87 Difference]: Start difference. First operand 1365 states and 2512 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2023-04-01 10:10:01,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:01,556 INFO L93 Difference]: Finished difference Result 4160 states and 7678 transitions. [2023-04-01 10:10:01,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:10:01,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 20 [2023-04-01 10:10:01,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:01,573 INFO L225 Difference]: With dead ends: 4160 [2023-04-01 10:10:01,574 INFO L226 Difference]: Without dead ends: 2800 [2023-04-01 10:10:01,589 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 [2023-04-01 10:10:01,592 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2396 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3929 mSolverCounterSat, 1158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2396 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 5087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1158 IncrementalHoareTripleChecker+Valid, 3929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:01,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2396 Valid, 111 Invalid, 5087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1158 Valid, 3929 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-01 10:10:01,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2023-04-01 10:10:01,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 2738. [2023-04-01 10:10:01,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2738 states, 2696 states have (on average 1.5649109792284865) internal successors, (4219), 2700 states have internal predecessors, (4219), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (74), 22 states have call predecessors, (74), 14 states have call successors, (74) [2023-04-01 10:10:01,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2738 states to 2738 states and 4308 transitions. [2023-04-01 10:10:01,852 INFO L78 Accepts]: Start accepts. Automaton has 2738 states and 4308 transitions. Word has length 20 [2023-04-01 10:10:01,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:01,852 INFO L495 AbstractCegarLoop]: Abstraction has 2738 states and 4308 transitions. [2023-04-01 10:10:01,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2023-04-01 10:10:01,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2738 states and 4308 transitions. [2023-04-01 10:10:01,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 10:10:01,853 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:01,853 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:10:01,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:10:01,853 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:01,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:01,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1808134919, now seen corresponding path program 1 times [2023-04-01 10:10:01,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:01,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291504002] [2023-04-01 10:10:01,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:01,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:10:02,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:02,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291504002] [2023-04-01 10:10:02,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291504002] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:10:02,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:10:02,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:10:02,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169942364] [2023-04-01 10:10:02,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:10:02,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:10:02,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:10:02,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:10:02,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:10:02,068 INFO L87 Difference]: Start difference. First operand 2738 states and 4308 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-04-01 10:10:07,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:07,285 INFO L93 Difference]: Finished difference Result 8482 states and 13664 transitions. [2023-04-01 10:10:07,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:10:07,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 22 [2023-04-01 10:10:07,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:07,316 INFO L225 Difference]: With dead ends: 8482 [2023-04-01 10:10:07,317 INFO L226 Difference]: Without dead ends: 5749 [2023-04-01 10:10:07,326 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 [2023-04-01 10:10:07,327 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 2173 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 4953 mSolverCounterSat, 851 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2173 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 5804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 851 IncrementalHoareTripleChecker+Valid, 4953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:07,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2173 Valid, 127 Invalid, 5804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [851 Valid, 4953 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-04-01 10:10:07,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5749 states. [2023-04-01 10:10:07,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5749 to 5611. [2023-04-01 10:10:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5611 states, 5475 states have (on average 1.3919634703196346) internal successors, (7621), 5506 states have internal predecessors, (7621), 27 states have call successors, (27), 27 states have call predecessors, (27), 108 states have return successors, (423), 77 states have call predecessors, (423), 26 states have call successors, (423) [2023-04-01 10:10:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5611 states to 5611 states and 8071 transitions. [2023-04-01 10:10:07,574 INFO L78 Accepts]: Start accepts. Automaton has 5611 states and 8071 transitions. Word has length 22 [2023-04-01 10:10:07,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:07,575 INFO L495 AbstractCegarLoop]: Abstraction has 5611 states and 8071 transitions. [2023-04-01 10:10:07,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-04-01 10:10:07,575 INFO L276 IsEmpty]: Start isEmpty. Operand 5611 states and 8071 transitions. [2023-04-01 10:10:07,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 10:10:07,576 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:07,576 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] [2023-04-01 10:10:07,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:10:07,577 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:07,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:07,579 INFO L85 PathProgramCache]: Analyzing trace with hash 954169165, now seen corresponding path program 1 times [2023-04-01 10:10:07,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:07,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641528490] [2023-04-01 10:10:07,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:07,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:07,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:10:07,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:07,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641528490] [2023-04-01 10:10:07,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641528490] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:10:07,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:10:07,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:10:07,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422628331] [2023-04-01 10:10:07,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:10:07,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:10:07,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:10:07,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:10:07,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:10:07,771 INFO L87 Difference]: Start difference. First operand 5611 states and 8071 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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) [2023-04-01 10:10:12,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:12,266 INFO L93 Difference]: Finished difference Result 17122 states and 26247 transitions. [2023-04-01 10:10:12,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:10:12,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 28 [2023-04-01 10:10:12,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:12,330 INFO L225 Difference]: With dead ends: 17122 [2023-04-01 10:10:12,331 INFO L226 Difference]: Without dead ends: 11516 [2023-04-01 10:10:12,351 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 [2023-04-01 10:10:12,352 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 2182 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 4805 mSolverCounterSat, 999 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2182 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 5804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 999 IncrementalHoareTripleChecker+Valid, 4805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:12,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2182 Valid, 112 Invalid, 5804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [999 Valid, 4805 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-01 10:10:12,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11516 states. [2023-04-01 10:10:12,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11516 to 11110. [2023-04-01 10:10:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11110 states, 10785 states have (on average 1.3613351877607789) internal successors, (14682), 10879 states have internal predecessors, (14682), 51 states have call successors, (51), 51 states have call predecessors, (51), 273 states have return successors, (1656), 179 states have call predecessors, (1656), 50 states have call successors, (1656) [2023-04-01 10:10:12,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11110 states to 11110 states and 16389 transitions. [2023-04-01 10:10:12,711 INFO L78 Accepts]: Start accepts. Automaton has 11110 states and 16389 transitions. Word has length 28 [2023-04-01 10:10:12,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:12,711 INFO L495 AbstractCegarLoop]: Abstraction has 11110 states and 16389 transitions. [2023-04-01 10:10:12,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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) [2023-04-01 10:10:12,711 INFO L276 IsEmpty]: Start isEmpty. Operand 11110 states and 16389 transitions. [2023-04-01 10:10:12,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 10:10:12,713 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:12,713 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] [2023-04-01 10:10:12,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:10:12,713 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:12,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:12,714 INFO L85 PathProgramCache]: Analyzing trace with hash -2114262419, now seen corresponding path program 1 times [2023-04-01 10:10:12,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:12,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588978199] [2023-04-01 10:10:12,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:12,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:10:12,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:12,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588978199] [2023-04-01 10:10:12,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588978199] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:10:12,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:10:12,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:10:12,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255091110] [2023-04-01 10:10:12,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:10:12,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:10:12,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:10:12,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:10:12,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:10:12,826 INFO L87 Difference]: Start difference. First operand 11110 states and 16389 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:10:16,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:16,089 INFO L93 Difference]: Finished difference Result 32965 states and 50899 transitions. [2023-04-01 10:10:16,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:10:16,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2023-04-01 10:10:16,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:16,198 INFO L225 Difference]: With dead ends: 32965 [2023-04-01 10:10:16,198 INFO L226 Difference]: Without dead ends: 21860 [2023-04-01 10:10:16,240 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 [2023-04-01 10:10:16,243 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 824 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 2078 mSolverCounterSat, 648 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 2726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 648 IncrementalHoareTripleChecker+Valid, 2078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:16,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [824 Valid, 300 Invalid, 2726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [648 Valid, 2078 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 10:10:16,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21860 states. [2023-04-01 10:10:16,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21860 to 19220. [2023-04-01 10:10:16,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19220 states, 18725 states have (on average 1.3179706275033378) internal successors, (24679), 18861 states have internal predecessors, (24679), 89 states have call successors, (89), 89 states have call predecessors, (89), 405 states have return successors, (4033), 269 states have call predecessors, (4033), 88 states have call successors, (4033) [2023-04-01 10:10:16,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19220 states to 19220 states and 28801 transitions. [2023-04-01 10:10:16,760 INFO L78 Accepts]: Start accepts. Automaton has 19220 states and 28801 transitions. Word has length 44 [2023-04-01 10:10:16,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:16,761 INFO L495 AbstractCegarLoop]: Abstraction has 19220 states and 28801 transitions. [2023-04-01 10:10:16,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:10:16,761 INFO L276 IsEmpty]: Start isEmpty. Operand 19220 states and 28801 transitions. [2023-04-01 10:10:16,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-01 10:10:16,770 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:16,771 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2023-04-01 10:10:16,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 10:10:16,771 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:16,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:16,771 INFO L85 PathProgramCache]: Analyzing trace with hash -877052655, now seen corresponding path program 1 times [2023-04-01 10:10:16,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:16,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839497495] [2023-04-01 10:10:16,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:16,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-04-01 10:10:17,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:17,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839497495] [2023-04-01 10:10:17,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839497495] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:10:17,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:10:17,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:10:17,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033265292] [2023-04-01 10:10:17,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:10:17,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:10:17,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:10:17,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:10:17,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:10:17,166 INFO L87 Difference]: Start difference. First operand 19220 states and 28801 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2023-04-01 10:10:22,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 10:10:22,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:22,814 INFO L93 Difference]: Finished difference Result 47935 states and 74514 transitions. [2023-04-01 10:10:22,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:10:22,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 76 [2023-04-01 10:10:22,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:22,970 INFO L225 Difference]: With dead ends: 47935 [2023-04-01 10:10:22,970 INFO L226 Difference]: Without dead ends: 28720 [2023-04-01 10:10:23,030 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 [2023-04-01 10:10:23,031 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 693 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 480 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 3001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:23,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 342 Invalid, 3001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 2520 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2023-04-01 10:10:23,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28720 states. [2023-04-01 10:10:23,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28720 to 28570. [2023-04-01 10:10:23,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28570 states, 27907 states have (on average 1.3297022252481456) internal successors, (37108), 28085 states have internal predecessors, (37108), 131 states have call successors, (131), 131 states have call predecessors, (131), 531 states have return successors, (7550), 353 states have call predecessors, (7550), 130 states have call successors, (7550) [2023-04-01 10:10:23,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28570 states to 28570 states and 44789 transitions. [2023-04-01 10:10:23,755 INFO L78 Accepts]: Start accepts. Automaton has 28570 states and 44789 transitions. Word has length 76 [2023-04-01 10:10:23,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:23,756 INFO L495 AbstractCegarLoop]: Abstraction has 28570 states and 44789 transitions. [2023-04-01 10:10:23,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2023-04-01 10:10:23,756 INFO L276 IsEmpty]: Start isEmpty. Operand 28570 states and 44789 transitions. [2023-04-01 10:10:23,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 10:10:23,758 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:23,758 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2023-04-01 10:10:23,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 10:10:23,759 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:23,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:23,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1579917482, now seen corresponding path program 1 times [2023-04-01 10:10:23,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:23,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140604958] [2023-04-01 10:10:23,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:23,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 72 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 10:10:24,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:24,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140604958] [2023-04-01 10:10:24,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140604958] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:10:24,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508370783] [2023-04-01 10:10:24,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:24,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:10:24,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:10:24,114 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:10:24,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 10:10:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:24,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:10:24,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:10:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 72 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 10:10:24,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:10:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 72 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 10:10:24,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508370783] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:10:24,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [543553029] [2023-04-01 10:10:24,587 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-04-01 10:10:24,587 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:10:24,590 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:10:24,595 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:10:24,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:10:24,854 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 81 for LOIs [2023-04-01 10:10:25,208 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 60 [2023-04-01 10:10:25,842 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 9853 conjuctions. This might take some time... [2023-04-01 10:10:25,970 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 15 conjuctions.