/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/Problem05_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:32:57,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:32:57,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:32:57,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:32:57,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:32:57,244 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:32:57,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:32:57,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:32:57,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:32:57,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:32:57,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:32:57,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:32:57,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:32:57,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:32:57,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:32:57,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:32:57,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:32:57,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:32:57,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:32:57,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:32:57,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:32:57,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:32:57,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:32:57,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:32:57,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:32:57,277 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:32:57,277 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:32:57,277 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:32:57,277 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:32:57,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:32:57,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:32:57,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:32:57,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:32:57,279 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:32:57,280 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:32:57,280 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:32:57,287 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:32:57,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:32:57,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:32:57,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:32:57,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:32:57,289 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 09:32:57,314 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:32:57,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:32:57,314 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:32:57,314 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:32:57,315 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:32:57,315 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:32:57,315 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:32:57,315 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:32:57,315 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:32:57,315 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:32:57,316 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:32:57,316 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:32:57,316 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:32:57,316 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:32:57,316 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:32:57,316 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:32:57,316 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:32:57,316 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:32:57,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:32:57,317 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:32:57,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:32:57,317 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:32:57,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:32:57,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:32:57,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:32:57,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:32:57,318 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:32:57,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:32:57,318 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:32:57,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:32:57,318 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:32:57,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:32:57,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:32:57,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:32:57,319 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:32:57,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:32:57,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:32:57,319 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:32:57,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:32:57,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:32:57,319 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:32:57,319 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:32:57,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:32:57,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:32:57,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:32:57,521 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:32:57,522 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:32:57,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem05_label13.c [2023-04-01 09:32:58,490 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:32:58,900 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:32:58,900 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem05_label13.c [2023-04-01 09:32:58,938 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1affaa3fe/0c709c99968c4a2fa4df62b2e73fa3e4/FLAGc673237e8 [2023-04-01 09:32:58,952 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1affaa3fe/0c709c99968c4a2fa4df62b2e73fa3e4 [2023-04-01 09:32:58,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:32:58,956 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:32:58,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:32:58,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:32:58,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:32:58,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:32:58" (1/1) ... [2023-04-01 09:32:58,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16d3bb54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:32:58, skipping insertion in model container [2023-04-01 09:32:58,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:32:58" (1/1) ... [2023-04-01 09:32:58,972 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:32:59,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:33:00,192 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/Problem05_label13.c[374958,374971] [2023-04-01 09:33:00,211 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:33:00,218 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:33:00,839 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/Problem05_label13.c[374958,374971] [2023-04-01 09:33:00,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:33:00,880 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:33:00,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:00 WrapperNode [2023-04-01 09:33:00,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:33:00,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:33:00,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:33:00,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:33:00,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:00" (1/1) ... [2023-04-01 09:33:00,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:00" (1/1) ... [2023-04-01 09:33:00,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:00" (1/1) ... [2023-04-01 09:33:00,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:00" (1/1) ... [2023-04-01 09:33:01,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:00" (1/1) ... [2023-04-01 09:33:01,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:00" (1/1) ... [2023-04-01 09:33:01,104 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:00" (1/1) ... [2023-04-01 09:33:01,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:00" (1/1) ... [2023-04-01 09:33:01,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:33:01,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:33:01,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:33:01,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:33:01,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:00" (1/1) ... [2023-04-01 09:33:01,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:33:01,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:33:01,192 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 09:33:01,198 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 09:33:01,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:33:01,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:33:01,224 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:33:01,224 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:33:01,224 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 09:33:01,224 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 09:33:01,224 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 09:33:01,224 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 09:33:01,224 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 09:33:01,225 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output7 [2023-04-01 09:33:01,225 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output8 [2023-04-01 09:33:01,225 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:33:01,225 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:33:01,225 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 09:33:01,225 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 09:33:01,225 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 09:33:01,225 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 09:33:01,225 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 09:33:01,225 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output7 [2023-04-01 09:33:01,225 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output8 [2023-04-01 09:33:01,225 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:33:01,225 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:33:01,226 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:33:01,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:33:01,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:33:01,226 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:33:01,226 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:33:01,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:33:01,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:33:01,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:33:01,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:33:01,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:33:01,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:33:01,328 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:33:01,330 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:33:06,223 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:33:07,370 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:33:07,370 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:33:07,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:33:07 BoogieIcfgContainer [2023-04-01 09:33:07,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:33:07,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:33:07,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:33:07,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:33:07,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:32:58" (1/3) ... [2023-04-01 09:33:07,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b5c32e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:33:07, skipping insertion in model container [2023-04-01 09:33:07,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:00" (2/3) ... [2023-04-01 09:33:07,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b5c32e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:33:07, skipping insertion in model container [2023-04-01 09:33:07,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:33:07" (3/3) ... [2023-04-01 09:33:07,379 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label13.c [2023-04-01 09:33:07,392 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:33:07,392 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:33:07,443 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:33:07,448 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;@161d8135, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:33:07,448 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:33:07,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 1681 states, 1659 states have (on average 1.9825195901145267) internal successors, (3289), 1660 states have internal predecessors, (3289), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 09:33:07,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1652 [2023-04-01 09:33:07,524 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:33:07,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:33:07,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:33:07,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:33:07,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1963493866, now seen corresponding path program 1 times [2023-04-01 09:33:07,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:33:07,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753225087] [2023-04-01 09:33:07,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:33:07,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:33:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:33:13,792 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 09:33:13,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:33:13,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753225087] [2023-04-01 09:33:13,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753225087] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:33:13,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:33:13,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:33:13,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360328260] [2023-04-01 09:33:13,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:33:13,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:33:13,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:33:13,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:33:13,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:33:13,833 INFO L87 Difference]: Start difference. First operand has 1681 states, 1659 states have (on average 1.9825195901145267) internal successors, (3289), 1660 states have internal predecessors, (3289), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:33:19,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:33:19,266 INFO L93 Difference]: Finished difference Result 5031 states and 9947 transitions. [2023-04-01 09:33:19,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:33:19,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1651 [2023-04-01 09:33:19,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:33:19,309 INFO L225 Difference]: With dead ends: 5031 [2023-04-01 09:33:19,310 INFO L226 Difference]: Without dead ends: 3347 [2023-04-01 09:33:19,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 09:33:19,324 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 117 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 4950 mSolverCounterSat, 2846 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 7796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2846 IncrementalHoareTripleChecker+Valid, 4950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:33:19,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 204 Invalid, 7796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2846 Valid, 4950 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-04-01 09:33:19,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3347 states. [2023-04-01 09:33:19,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3347 to 3347. [2023-04-01 09:33:19,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3347 states, 3311 states have (on average 1.948051948051948) internal successors, (6450), 3311 states have internal predecessors, (6450), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) [2023-04-01 09:33:19,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3347 states to 3347 states and 6501 transitions. [2023-04-01 09:33:19,465 INFO L78 Accepts]: Start accepts. Automaton has 3347 states and 6501 transitions. Word has length 1651 [2023-04-01 09:33:19,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:33:19,468 INFO L495 AbstractCegarLoop]: Abstraction has 3347 states and 6501 transitions. [2023-04-01 09:33:19,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:33:19,469 INFO L276 IsEmpty]: Start isEmpty. Operand 3347 states and 6501 transitions. [2023-04-01 09:33:19,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1676 [2023-04-01 09:33:19,508 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:33:19,509 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:33:19,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:33:19,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:33:19,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:33:19,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1988705851, now seen corresponding path program 1 times [2023-04-01 09:33:19,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:33:19,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218336827] [2023-04-01 09:33:19,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:33:19,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:33:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:33:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:33:21,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:33:21,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218336827] [2023-04-01 09:33:21,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218336827] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:33:21,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:33:21,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:33:21,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080233612] [2023-04-01 09:33:21,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:33:21,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:33:21,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:33:21,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:33:21,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:33:21,449 INFO L87 Difference]: Start difference. First operand 3347 states and 6501 transitions. Second operand has 5 states, 5 states have (on average 332.4) internal successors, (1662), 4 states have internal predecessors, (1662), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:33:27,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:33:27,845 INFO L93 Difference]: Finished difference Result 10220 states and 19871 transitions. [2023-04-01 09:33:27,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:33:27,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 332.4) internal successors, (1662), 4 states have internal predecessors, (1662), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 1675 [2023-04-01 09:33:27,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:33:27,873 INFO L225 Difference]: With dead ends: 10220 [2023-04-01 09:33:27,873 INFO L226 Difference]: Without dead ends: 6878 [2023-04-01 09:33:27,878 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 09:33:27,879 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 6801 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 8860 mSolverCounterSat, 3038 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6801 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 11898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3038 IncrementalHoareTripleChecker+Valid, 8860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:33:27,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6801 Valid, 203 Invalid, 11898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3038 Valid, 8860 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-04-01 09:33:27,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6878 states. [2023-04-01 09:33:28,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6878 to 6813. [2023-04-01 09:33:28,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6813 states, 6701 states have (on average 1.8016713923295031) internal successors, (12073), 6707 states have internal predecessors, (12073), 34 states have call successors, (34), 34 states have call predecessors, (34), 77 states have return successors, (197), 71 states have call predecessors, (197), 33 states have call successors, (197) [2023-04-01 09:33:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6813 states to 6813 states and 12304 transitions. [2023-04-01 09:33:28,030 INFO L78 Accepts]: Start accepts. Automaton has 6813 states and 12304 transitions. Word has length 1675 [2023-04-01 09:33:28,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:33:28,031 INFO L495 AbstractCegarLoop]: Abstraction has 6813 states and 12304 transitions. [2023-04-01 09:33:28,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 332.4) internal successors, (1662), 4 states have internal predecessors, (1662), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:33:28,032 INFO L276 IsEmpty]: Start isEmpty. Operand 6813 states and 12304 transitions. [2023-04-01 09:33:28,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1681 [2023-04-01 09:33:28,065 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:33:28,066 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:33:28,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:33:28,066 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:33:28,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:33:28,067 INFO L85 PathProgramCache]: Analyzing trace with hash 503939957, now seen corresponding path program 1 times [2023-04-01 09:33:28,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:33:28,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418088429] [2023-04-01 09:33:28,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:33:28,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:33:28,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:33:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:33:29,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:33:29,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418088429] [2023-04-01 09:33:29,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418088429] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:33:29,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:33:29,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:33:29,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300548582] [2023-04-01 09:33:29,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:33:29,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:33:29,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:33:29,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:33:29,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:33:29,603 INFO L87 Difference]: Start difference. First operand 6813 states and 12304 transitions. Second operand has 5 states, 5 states have (on average 333.4) internal successors, (1667), 4 states have internal predecessors, (1667), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:33:35,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:33:35,427 INFO L93 Difference]: Finished difference Result 20817 states and 38127 transitions. [2023-04-01 09:33:35,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:33:35,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 333.4) internal successors, (1667), 4 states have internal predecessors, (1667), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 1680 [2023-04-01 09:33:35,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:33:35,494 INFO L225 Difference]: With dead ends: 20817 [2023-04-01 09:33:35,495 INFO L226 Difference]: Without dead ends: 14009 [2023-04-01 09:33:35,514 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 09:33:35,516 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 6893 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 8491 mSolverCounterSat, 3329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6893 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 11820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3329 IncrementalHoareTripleChecker+Valid, 8491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-04-01 09:33:35,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6893 Valid, 186 Invalid, 11820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3329 Valid, 8491 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-04-01 09:33:35,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14009 states. [2023-04-01 09:33:35,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14009 to 13917. [2023-04-01 09:33:35,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13917 states, 13592 states have (on average 1.5679811653914066) internal successors, (21312), 13621 states have internal predecessors, (21312), 66 states have call successors, (66), 66 states have call predecessors, (66), 258 states have return successors, (1023), 229 states have call predecessors, (1023), 65 states have call successors, (1023) [2023-04-01 09:33:35,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13917 states to 13917 states and 22401 transitions. [2023-04-01 09:33:35,962 INFO L78 Accepts]: Start accepts. Automaton has 13917 states and 22401 transitions. Word has length 1680 [2023-04-01 09:33:35,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:33:35,962 INFO L495 AbstractCegarLoop]: Abstraction has 13917 states and 22401 transitions. [2023-04-01 09:33:35,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 333.4) internal successors, (1667), 4 states have internal predecessors, (1667), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:33:35,963 INFO L276 IsEmpty]: Start isEmpty. Operand 13917 states and 22401 transitions. [2023-04-01 09:33:36,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1697 [2023-04-01 09:33:36,007 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:33:36,008 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:33:36,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 09:33:36,009 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:33:36,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:33:36,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1664431890, now seen corresponding path program 1 times [2023-04-01 09:33:36,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:33:36,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349379555] [2023-04-01 09:33:36,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:33:36,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:33:36,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:33:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:33:37,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:33:37,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349379555] [2023-04-01 09:33:37,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349379555] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:33:37,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:33:37,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:33:37,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276240665] [2023-04-01 09:33:37,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:33:37,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:33:37,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:33:37,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:33:37,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:33:37,815 INFO L87 Difference]: Start difference. First operand 13917 states and 22401 transitions. Second operand has 5 states, 5 states have (on average 336.6) internal successors, (1683), 4 states have internal predecessors, (1683), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:33:43,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:33:43,794 INFO L93 Difference]: Finished difference Result 40259 states and 66114 transitions. [2023-04-01 09:33:43,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:33:43,795 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 336.6) internal successors, (1683), 4 states have internal predecessors, (1683), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 1696 [2023-04-01 09:33:43,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:33:43,874 INFO L225 Difference]: With dead ends: 40259 [2023-04-01 09:33:43,874 INFO L226 Difference]: Without dead ends: 26347 [2023-04-01 09:33:43,904 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 09:33:43,905 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 6550 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 9192 mSolverCounterSat, 2694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6550 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 11886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2694 IncrementalHoareTripleChecker+Valid, 9192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-04-01 09:33:43,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6550 Valid, 210 Invalid, 11886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2694 Valid, 9192 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-04-01 09:33:43,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26347 states. [2023-04-01 09:33:44,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26347 to 26295. [2023-04-01 09:33:44,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26295 states, 25616 states have (on average 1.4417941911305434) internal successors, (36933), 25683 states have internal predecessors, (36933), 122 states have call successors, (122), 122 states have call predecessors, (122), 556 states have return successors, (3357), 489 states have call predecessors, (3357), 121 states have call successors, (3357) [2023-04-01 09:33:44,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26295 states to 26295 states and 40412 transitions. [2023-04-01 09:33:44,452 INFO L78 Accepts]: Start accepts. Automaton has 26295 states and 40412 transitions. Word has length 1696 [2023-04-01 09:33:44,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:33:44,452 INFO L495 AbstractCegarLoop]: Abstraction has 26295 states and 40412 transitions. [2023-04-01 09:33:44,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 336.6) internal successors, (1683), 4 states have internal predecessors, (1683), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:33:44,453 INFO L276 IsEmpty]: Start isEmpty. Operand 26295 states and 40412 transitions. [2023-04-01 09:33:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1703 [2023-04-01 09:33:44,519 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:33:44,520 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:33:44,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 09:33:44,520 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:33:44,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:33:44,521 INFO L85 PathProgramCache]: Analyzing trace with hash -124311884, now seen corresponding path program 1 times [2023-04-01 09:33:44,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:33:44,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337343890] [2023-04-01 09:33:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:33:44,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:33:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:33:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-01 09:33:46,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:33:46,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337343890] [2023-04-01 09:33:46,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337343890] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:33:46,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291791732] [2023-04-01 09:33:46,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:33:46,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:33:46,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:33:46,342 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 09:33:46,345 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 09:33:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:33:46,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 2177 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:33:46,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:33:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 65 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:33:46,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:33:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 65 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:33:47,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291791732] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:33:47,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1148654826] [2023-04-01 09:33:47,179 INFO L159 IcfgInterpreter]: Started Sifa with 1655 locations of interest [2023-04-01 09:33:47,179 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:33:47,183 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:33:47,191 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:33:47,191 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:33:47,435 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 88 for LOIs