/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem12_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:02:53,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:02:53,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:02:53,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:02:53,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:02:53,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:02:53,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:02:53,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:02:53,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:02:53,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:02:53,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:02:53,227 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:02:53,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:02:53,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:02:53,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:02:53,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:02:53,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:02:53,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:02:53,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:02:53,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:02:53,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:02:53,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:02:53,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:02:53,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:02:53,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:02:53,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:02:53,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:02:53,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:02:53,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:02:53,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:02:53,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:02:53,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:02:53,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:02:53,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:02:53,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:02:53,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:02:53,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:02:53,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:02:53,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:02:53,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:02:53,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:02:53,255 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 04:02:53,279 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:02:53,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:02:53,280 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:02:53,280 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:02:53,281 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:02:53,281 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:02:53,281 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:02:53,281 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:02:53,281 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:02:53,281 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:02:53,282 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:02:53,282 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:02:53,282 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:02:53,282 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:02:53,282 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:02:53,282 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:02:53,283 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:02:53,283 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:02:53,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:02:53,283 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:02:53,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:02:53,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:02:53,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:02:53,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:02:53,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:02:53,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:02:53,284 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:02:53,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:02:53,284 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:02:53,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:02:53,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:02:53,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:02:53,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:02:53,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:02:53,285 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:02:53,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:02:53,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:02:53,285 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:02:53,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:02:53,285 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:02:53,285 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:02:53,286 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:02:53,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:02:53,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:02:53,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:02:53,534 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:02:53,535 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:02:53,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label49.c [2023-04-01 04:02:54,814 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:02:55,203 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:02:55,204 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label49.c [2023-04-01 04:02:55,232 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73a492298/7b5d1150cbf140a68edd0baab377fc5d/FLAG50cf2cbc0 [2023-04-01 04:02:55,243 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73a492298/7b5d1150cbf140a68edd0baab377fc5d [2023-04-01 04:02:55,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:02:55,247 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:02:55,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:02:55,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:02:55,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:02:55,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:02:55" (1/1) ... [2023-04-01 04:02:55,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55dde717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:55, skipping insertion in model container [2023-04-01 04:02:55,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:02:55" (1/1) ... [2023-04-01 04:02:55,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:02:55,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:02:55,563 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/Problem12_label49.c[5366,5379] [2023-04-01 04:02:56,172 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:02:56,183 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:02:56,208 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/Problem12_label49.c[5366,5379] [2023-04-01 04:02:56,514 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:02:56,530 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:02:56,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:56 WrapperNode [2023-04-01 04:02:56,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:02:56,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:02:56,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:02:56,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:02:56,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:56" (1/1) ... [2023-04-01 04:02:56,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:56" (1/1) ... [2023-04-01 04:02:56,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:56" (1/1) ... [2023-04-01 04:02:56,582 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:56" (1/1) ... [2023-04-01 04:02:56,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:56" (1/1) ... [2023-04-01 04:02:56,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:56" (1/1) ... [2023-04-01 04:02:56,695 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:56" (1/1) ... [2023-04-01 04:02:56,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:56" (1/1) ... [2023-04-01 04:02:56,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:02:56,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:02:56,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:02:56,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:02:56,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:56" (1/1) ... [2023-04-01 04:02:56,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:02:56,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:02:56,755 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 04:02:56,781 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 04:02:56,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:02:56,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:02:56,799 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:02:56,799 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:02:56,799 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:02:56,799 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:02:56,799 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:02:56,799 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:02:56,800 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:02:56,800 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:02:56,800 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:02:56,800 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:02:56,800 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:02:56,800 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:02:56,800 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:02:56,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:02:56,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:02:56,800 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:02:56,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:02:56,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:02:56,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:02:56,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:02:56,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:02:56,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:02:56,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:02:56,875 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:02:56,876 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:02:59,975 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:03:00,367 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:03:00,367 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:03:00,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:03:00 BoogieIcfgContainer [2023-04-01 04:03:00,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:03:00,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:03:00,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:03:00,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:03:00,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:02:55" (1/3) ... [2023-04-01 04:03:00,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c318a79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:03:00, skipping insertion in model container [2023-04-01 04:03:00,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:56" (2/3) ... [2023-04-01 04:03:00,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c318a79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:03:00, skipping insertion in model container [2023-04-01 04:03:00,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:03:00" (3/3) ... [2023-04-01 04:03:00,376 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label49.c [2023-04-01 04:03:00,389 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:03:00,390 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:03:00,432 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:03:00,437 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;@6301a243, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:03:00,437 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:03:00,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:03:00,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:03:00,448 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:00,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:03:00,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:00,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:00,453 INFO L85 PathProgramCache]: Analyzing trace with hash 636342785, now seen corresponding path program 1 times [2023-04-01 04:03:00,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:00,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711751126] [2023-04-01 04:03:00,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:00,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:00,672 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 04:03:00,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:00,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711751126] [2023-04-01 04:03:00,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711751126] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:03:00,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:03:00,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:03:00,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48498635] [2023-04-01 04:03:00,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:03:00,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:03:00,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:03:00,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:03:00,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:03:00,699 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:03:03,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:03:03,701 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 04:03:03,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:03:03,705 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 04:03:03,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:03:03,735 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 04:03:03,735 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 04:03:03,740 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 04:03:03,743 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 846 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:03:03,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 217 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 04:03:03,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 04:03:03,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-01 04:03:03,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.857037037037037) internal successors, (2507), 1350 states have internal predecessors, (2507), 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 04:03:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2530 transitions. [2023-04-01 04:03:03,874 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2530 transitions. Word has length 11 [2023-04-01 04:03:03,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:03:03,874 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2530 transitions. [2023-04-01 04:03:03,875 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 04:03:03,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2530 transitions. [2023-04-01 04:03:03,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:03:03,876 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:03,876 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] [2023-04-01 04:03:03,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:03:03,876 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:03,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:03,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1390100588, now seen corresponding path program 1 times [2023-04-01 04:03:03,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:03,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927887097] [2023-04-01 04:03:03,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:03,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:04,040 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 04:03:04,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:04,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927887097] [2023-04-01 04:03:04,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927887097] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:03:04,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:03:04,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:03:04,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870482098] [2023-04-01 04:03:04,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:03:04,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:03:04,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:03:04,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:03:04,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:03:04,043 INFO L87 Difference]: Start difference. First operand 1368 states and 2530 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 04:03:07,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:03:07,024 INFO L93 Difference]: Finished difference Result 4138 states and 7702 transitions. [2023-04-01 04:03:07,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:03:07,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 25 [2023-04-01 04:03:07,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:03:07,053 INFO L225 Difference]: With dead ends: 4138 [2023-04-01 04:03:07,054 INFO L226 Difference]: Without dead ends: 2775 [2023-04-01 04:03:07,063 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 04:03:07,066 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2488 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 3906 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2488 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 4816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 3906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:03:07,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2488 Valid, 118 Invalid, 4816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 3906 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 04:03:07,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2023-04-01 04:03:07,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2757. [2023-04-01 04:03:07,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2715 states have (on average 1.6976058931860036) internal successors, (4609), 2719 states have internal predecessors, (4609), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (77), 22 states have call predecessors, (77), 14 states have call successors, (77) [2023-04-01 04:03:07,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 4701 transitions. [2023-04-01 04:03:07,245 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 4701 transitions. Word has length 25 [2023-04-01 04:03:07,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:03:07,245 INFO L495 AbstractCegarLoop]: Abstraction has 2757 states and 4701 transitions. [2023-04-01 04:03:07,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 04:03:07,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 4701 transitions. [2023-04-01 04:03:07,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 04:03:07,253 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:07,254 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] [2023-04-01 04:03:07,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:03:07,254 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:07,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:07,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1138093339, now seen corresponding path program 1 times [2023-04-01 04:03:07,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:07,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578440786] [2023-04-01 04:03:07,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:07,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:07,584 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 04:03:07,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:07,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578440786] [2023-04-01 04:03:07,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578440786] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:03:07,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:03:07,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:03:07,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698168778] [2023-04-01 04:03:07,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:03:07,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:03:07,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:03:07,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:03:07,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:03:07,588 INFO L87 Difference]: Start difference. First operand 2757 states and 4701 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:03:10,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:03:10,208 INFO L93 Difference]: Finished difference Result 7729 states and 13220 transitions. [2023-04-01 04:03:10,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:03:10,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-04-01 04:03:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:03:10,246 INFO L225 Difference]: With dead ends: 7729 [2023-04-01 04:03:10,246 INFO L226 Difference]: Without dead ends: 4977 [2023-04-01 04:03:10,264 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 04:03:10,284 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2452 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3744 mSolverCounterSat, 1261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2452 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 5005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1261 IncrementalHoareTripleChecker+Valid, 3744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:03:10,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2452 Valid, 95 Invalid, 5005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1261 Valid, 3744 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 04:03:10,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2023-04-01 04:03:10,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4896. [2023-04-01 04:03:10,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4896 states, 4789 states have (on average 1.579661724785968) internal successors, (7565), 4809 states have internal predecessors, (7565), 24 states have call successors, (24), 24 states have call predecessors, (24), 82 states have return successors, (335), 62 states have call predecessors, (335), 23 states have call successors, (335) [2023-04-01 04:03:10,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4896 states to 4896 states and 7924 transitions. [2023-04-01 04:03:10,457 INFO L78 Accepts]: Start accepts. Automaton has 4896 states and 7924 transitions. Word has length 30 [2023-04-01 04:03:10,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:03:10,457 INFO L495 AbstractCegarLoop]: Abstraction has 4896 states and 7924 transitions. [2023-04-01 04:03:10,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:03:10,457 INFO L276 IsEmpty]: Start isEmpty. Operand 4896 states and 7924 transitions. [2023-04-01 04:03:10,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 04:03:10,458 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:10,458 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:03:10,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:03:10,458 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:10,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:10,459 INFO L85 PathProgramCache]: Analyzing trace with hash -269261181, now seen corresponding path program 1 times [2023-04-01 04:03:10,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:10,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339013632] [2023-04-01 04:03:10,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:10,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:03:10,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:10,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339013632] [2023-04-01 04:03:10,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339013632] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:03:10,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411678518] [2023-04-01 04:03:10,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:10,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:03:10,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:03:10,540 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 04:03:10,541 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 04:03:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:10,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:03:10,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:03:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:03:10,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:03:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:03:10,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411678518] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:03:10,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [36831449] [2023-04-01 04:03:10,802 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-01 04:03:10,803 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:03:10,805 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:03:10,808 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:03:10,809 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:03:10,921 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 04:03:11,025 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 36 [2023-04-01 04:03:13,862 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 84423 conjuctions. This might take some time... [2023-04-01 04:03:22,840 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 705 conjuctions. [2023-04-01 04:03:51,289 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 25