/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/Problem18_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:28:41,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:28:41,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:28:41,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:28:41,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:28:41,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:28:41,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:28:41,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:28:41,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:28:41,190 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:28:41,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:28:41,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:28:41,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:28:41,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:28:41,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:28:41,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:28:41,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:28:41,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:28:41,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:28:41,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:28:41,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:28:41,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:28:41,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:28:41,216 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:28:41,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 04:28:41,227 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:28:41,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:28:41,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:28:41,230 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:28:41,230 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:28:41,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:28:41,231 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:28:41,231 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:28:41,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:28:41,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:28:41,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:28:41,234 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 04:28:41,252 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:28:41,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:28:41,253 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:28:41,253 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:28:41,254 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:28:41,254 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:28:41,254 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:28:41,254 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:28:41,255 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:28:41,255 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:28:41,255 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:28:41,255 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:28:41,255 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:28:41,255 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:28:41,255 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:28:41,256 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:28:41,256 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:28:41,256 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:28:41,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:28:41,257 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:28:41,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:28:41,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:28:41,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:28:41,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:28:41,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:28:41,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:28:41,258 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:28:41,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:28:41,258 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:28:41,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:28:41,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:28:41,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:28:41,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:28:41,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:28:41,259 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:28:41,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:28:41,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:28:41,260 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:28:41,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:28:41,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:28:41,260 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:28:41,261 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:28:41,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:28:41,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:28:41,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:28:41,537 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:28:41,538 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:28:41,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label51.c [2023-04-01 04:28:42,883 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:28:43,321 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:28:43,322 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label51.c [2023-04-01 04:28:43,347 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dd6c760f/be4a480c60d04fd1a876698a661e0185/FLAG89d4be319 [2023-04-01 04:28:43,365 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dd6c760f/be4a480c60d04fd1a876698a661e0185 [2023-04-01 04:28:43,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:28:43,370 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:28:43,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:28:43,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:28:43,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:28:43,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:28:43" (1/1) ... [2023-04-01 04:28:43,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@673cd01b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:43, skipping insertion in model container [2023-04-01 04:28:43,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:28:43" (1/1) ... [2023-04-01 04:28:43,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:28:43,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:28:43,694 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/Problem18_label51.c[6263,6276] [2023-04-01 04:28:44,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:28:44,298 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:28:44,330 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/Problem18_label51.c[6263,6276] [2023-04-01 04:28:44,678 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:28:44,697 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:28:44,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:44 WrapperNode [2023-04-01 04:28:44,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:28:44,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:28:44,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:28:44,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:28:44,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:44" (1/1) ... [2023-04-01 04:28:44,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:44" (1/1) ... [2023-04-01 04:28:44,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:44" (1/1) ... [2023-04-01 04:28:44,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:44" (1/1) ... [2023-04-01 04:28:44,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:44" (1/1) ... [2023-04-01 04:28:44,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:44" (1/1) ... [2023-04-01 04:28:44,948 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:44" (1/1) ... [2023-04-01 04:28:44,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:44" (1/1) ... [2023-04-01 04:28:44,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:28:44,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:28:44,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:28:44,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:28:44,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:44" (1/1) ... [2023-04-01 04:28:44,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:28:45,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:28:45,022 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 04:28:45,048 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 04:28:45,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:28:45,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:28:45,065 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:28:45,065 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:28:45,065 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:28:45,065 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:28:45,065 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:28:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:28:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:28:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:28:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:28:45,066 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:28:45,066 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:28:45,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:28:45,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:28:45,066 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:28:45,066 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:28:45,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:28:45,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:28:45,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:28:45,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:28:45,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:28:45,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:28:45,160 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:28:45,162 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:28:48,163 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:28:55,822 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:28:55,822 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:28:55,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:28:55 BoogieIcfgContainer [2023-04-01 04:28:55,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:28:55,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:28:55,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:28:55,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:28:55,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:28:43" (1/3) ... [2023-04-01 04:28:55,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@588e77f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:28:55, skipping insertion in model container [2023-04-01 04:28:55,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:44" (2/3) ... [2023-04-01 04:28:55,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@588e77f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:28:55, skipping insertion in model container [2023-04-01 04:28:55,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:28:55" (3/3) ... [2023-04-01 04:28:55,834 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label51.c [2023-04-01 04:28:55,849 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:28:55,850 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:28:55,912 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:28:55,919 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;@4fd6b451, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:28:55,920 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:28:55,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 04:28:55,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:28:55,933 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:28:55,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:28:55,934 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:28:55,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:28:55,938 INFO L85 PathProgramCache]: Analyzing trace with hash 314329187, now seen corresponding path program 1 times [2023-04-01 04:28:55,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:28:55,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180237851] [2023-04-01 04:28:55,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:28:55,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:28:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:28:56,291 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 04:28:56,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:28:56,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180237851] [2023-04-01 04:28:56,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180237851] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:28:56,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:28:56,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:28:56,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497596176] [2023-04-01 04:28:56,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:28:56,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:28:56,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:28:56,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:28:56,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:28:56,341 INFO L87 Difference]: Start difference. First operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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 04:28:58,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:28:58,465 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-04-01 04:28:58,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:28:58,470 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 04:28:58,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:28:58,492 INFO L225 Difference]: With dead ends: 1393 [2023-04-01 04:28:58,493 INFO L226 Difference]: Without dead ends: 921 [2023-04-01 04:28:58,500 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 04:28:58,505 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 480 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:28:58,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 68 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 04:28:58,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-01 04:28:58,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 899. [2023-04-01 04:28:58,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 885 states have (on average 1.9457627118644067) internal successors, (1722), 885 states have internal predecessors, (1722), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 04:28:58,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1739 transitions. [2023-04-01 04:28:58,587 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1739 transitions. Word has length 11 [2023-04-01 04:28:58,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:28:58,587 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 1739 transitions. [2023-04-01 04:28:58,588 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 04:28:58,588 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1739 transitions. [2023-04-01 04:28:58,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:28:58,589 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:28:58,589 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 04:28:58,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:28:58,590 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:28:58,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:28:58,590 INFO L85 PathProgramCache]: Analyzing trace with hash 570616633, now seen corresponding path program 1 times [2023-04-01 04:28:58,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:28:58,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612819075] [2023-04-01 04:28:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:28:58,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:28:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:28:58,767 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 04:28:58,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:28:58,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612819075] [2023-04-01 04:28:58,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612819075] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:28:58,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:28:58,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:28:58,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455381915] [2023-04-01 04:28:58,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:28:58,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:28:58,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:28:58,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:28:58,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:28:58,770 INFO L87 Difference]: Start difference. First operand 899 states and 1739 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 04:29:01,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:29:01,572 INFO L93 Difference]: Finished difference Result 2721 states and 5303 transitions. [2023-04-01 04:29:01,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:29:01,574 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 04:29:01,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:29:01,585 INFO L225 Difference]: With dead ends: 2721 [2023-04-01 04:29:01,585 INFO L226 Difference]: Without dead ends: 1827 [2023-04-01 04:29:01,587 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 04:29:01,588 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1716 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 2398 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1716 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 2398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:29:01,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1716 Valid, 71 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 2398 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 04:29:01,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2023-04-01 04:29:01,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1807. [2023-04-01 04:29:01,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1777 states have (on average 1.727068092290377) internal successors, (3069), 1781 states have internal predecessors, (3069), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (50), 14 states have call predecessors, (50), 10 states have call successors, (50) [2023-04-01 04:29:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 3130 transitions. [2023-04-01 04:29:01,663 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 3130 transitions. Word has length 25 [2023-04-01 04:29:01,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:29:01,663 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 3130 transitions. [2023-04-01 04:29:01,664 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 04:29:01,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 3130 transitions. [2023-04-01 04:29:01,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 04:29:01,665 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:29:01,665 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:29:01,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:29:01,665 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:29:01,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:29:01,666 INFO L85 PathProgramCache]: Analyzing trace with hash -2131957542, now seen corresponding path program 1 times [2023-04-01 04:29:01,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:29:01,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800000914] [2023-04-01 04:29:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:29:01,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:29:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:29:01,840 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 04:29:01,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:29:01,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800000914] [2023-04-01 04:29:01,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800000914] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:29:01,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:29:01,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:29:01,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13736830] [2023-04-01 04:29:01,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:29:01,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:29:01,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:29:01,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:29:01,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:29:01,845 INFO L87 Difference]: Start difference. First operand 1807 states and 3130 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:29:04,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:29:04,676 INFO L93 Difference]: Finished difference Result 5507 states and 9693 transitions. [2023-04-01 04:29:04,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:29:04,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-04-01 04:29:04,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:29:04,695 INFO L225 Difference]: With dead ends: 5507 [2023-04-01 04:29:04,696 INFO L226 Difference]: Without dead ends: 3705 [2023-04-01 04:29:04,703 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 04:29:04,705 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1549 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2646 mSolverCounterSat, 763 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 3409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 763 IncrementalHoareTripleChecker+Valid, 2646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:29:04,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1549 Valid, 87 Invalid, 3409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [763 Valid, 2646 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 04:29:04,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2023-04-01 04:29:04,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 3653. [2023-04-01 04:29:04,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3577 states have (on average 1.4788929270338271) internal successors, (5290), 3599 states have internal predecessors, (5290), 19 states have call successors, (19), 19 states have call predecessors, (19), 56 states have return successors, (228), 34 states have call predecessors, (228), 18 states have call successors, (228) [2023-04-01 04:29:04,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 5537 transitions. [2023-04-01 04:29:04,827 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 5537 transitions. Word has length 28 [2023-04-01 04:29:04,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:29:04,827 INFO L495 AbstractCegarLoop]: Abstraction has 3653 states and 5537 transitions. [2023-04-01 04:29:04,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:29:04,828 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 5537 transitions. [2023-04-01 04:29:04,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 04:29:04,829 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:29:04,829 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:29:04,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:29:04,830 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:29:04,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:29:04,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1183848444, now seen corresponding path program 1 times [2023-04-01 04:29:04,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:29:04,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050400308] [2023-04-01 04:29:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:29:04,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:29:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:29:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:29:04,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:29:04,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050400308] [2023-04-01 04:29:04,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050400308] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:29:04,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764125321] [2023-04-01 04:29:04,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:29:04,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:29:04,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:29:05,005 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 04:29:05,028 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 04:29:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:29:05,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:29:05,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:29:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:29:05,246 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:29:05,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764125321] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:29:05,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:29:05,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:29:05,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654604150] [2023-04-01 04:29:05,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:29:05,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:29:05,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:29:05,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:29:05,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:29:05,249 INFO L87 Difference]: Start difference. First operand 3653 states and 5537 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:29:07,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:29:07,929 INFO L93 Difference]: Finished difference Result 9191 states and 13934 transitions. [2023-04-01 04:29:07,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:29:07,932 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 38 [2023-04-01 04:29:07,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:29:07,957 INFO L225 Difference]: With dead ends: 9191 [2023-04-01 04:29:07,957 INFO L226 Difference]: Without dead ends: 5543 [2023-04-01 04:29:07,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:29:07,970 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1602 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2358 mSolverCounterSat, 822 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1602 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 822 IncrementalHoareTripleChecker+Valid, 2358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:29:07,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1602 Valid, 59 Invalid, 3180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [822 Valid, 2358 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 04:29:07,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5543 states. [2023-04-01 04:29:08,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5543 to 5485. [2023-04-01 04:29:08,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5485 states, 5359 states have (on average 1.3558499720097033) internal successors, (7266), 5402 states have internal predecessors, (7266), 27 states have call successors, (27), 27 states have call predecessors, (27), 98 states have return successors, (488), 55 states have call predecessors, (488), 26 states have call successors, (488) [2023-04-01 04:29:08,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5485 states to 5485 states and 7781 transitions. [2023-04-01 04:29:08,155 INFO L78 Accepts]: Start accepts. Automaton has 5485 states and 7781 transitions. Word has length 38 [2023-04-01 04:29:08,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:29:08,156 INFO L495 AbstractCegarLoop]: Abstraction has 5485 states and 7781 transitions. [2023-04-01 04:29:08,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:29:08,156 INFO L276 IsEmpty]: Start isEmpty. Operand 5485 states and 7781 transitions. [2023-04-01 04:29:08,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 04:29:08,164 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:29:08,164 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:29:08,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 04:29:08,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:29:08,376 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:29:08,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:29:08,377 INFO L85 PathProgramCache]: Analyzing trace with hash -38659660, now seen corresponding path program 1 times [2023-04-01 04:29:08,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:29:08,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537556901] [2023-04-01 04:29:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:29:08,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:29:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:29:08,611 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 04:29:08,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:29:08,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537556901] [2023-04-01 04:29:08,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537556901] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:29:08,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521931749] [2023-04-01 04:29:08,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:29:08,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:29:08,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:29:08,621 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:29:08,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:29:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:29:08,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:29:08,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:29:08,805 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 04:29:08,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:29:08,950 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 04:29:08,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521931749] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:29:08,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1942881407] [2023-04-01 04:29:08,984 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2023-04-01 04:29:08,984 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:29:08,987 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:29:08,992 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:29:08,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:29:09,117 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 44 for LOIs [2023-04-01 04:29:09,305 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 54