/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/Problem03_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:22:25,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:22:25,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:22:25,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:22:25,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:22:25,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:22:25,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:22:25,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:22:25,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:22:25,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:22:25,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:22:25,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:22:25,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:22:25,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:22:25,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:22:25,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:22:25,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:22:25,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:22:25,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:22:25,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:22:25,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:22:25,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:22:25,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:22:25,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:22:25,210 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 03:22:25,214 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:22:25,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:22:25,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:22:25,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:22:25,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:22:25,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:22:25,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:22:25,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:22:25,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:22:25,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:22:25,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:22:25,221 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 03:22:25,249 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:22:25,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:22:25,250 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:22:25,250 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:22:25,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:22:25,251 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:22:25,251 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:22:25,251 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:22:25,251 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:22:25,251 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:22:25,252 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:22:25,252 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:22:25,252 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:22:25,252 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:22:25,252 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:22:25,253 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:22:25,253 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:22:25,253 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:22:25,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:22:25,253 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:22:25,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:22:25,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:22:25,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:22:25,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:22:25,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:22:25,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:22:25,254 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:22:25,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:22:25,254 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:22:25,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:22:25,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:22:25,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:22:25,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:22:25,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:22:25,255 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:22:25,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:22:25,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:22:25,256 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:22:25,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:22:25,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:22:25,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:22:25,256 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:22:25,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:22:25,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:22:25,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:22:25,523 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:22:25,524 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:22:25,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label33.c [2023-04-01 03:22:26,801 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:22:27,150 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:22:27,151 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label33.c [2023-04-01 03:22:27,165 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dea898ded/5d67dc0e6ae6497b8816a768bbf1969d/FLAGa470c7894 [2023-04-01 03:22:27,180 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dea898ded/5d67dc0e6ae6497b8816a768bbf1969d [2023-04-01 03:22:27,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:22:27,184 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:22:27,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:22:27,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:22:27,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:22:27,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:22:27" (1/1) ... [2023-04-01 03:22:27,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45f7d89a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:27, skipping insertion in model container [2023-04-01 03:22:27,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:22:27" (1/1) ... [2023-04-01 03:22:27,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:22:27,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:22:27,788 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/Problem03_label33.c[55678,55691] [2023-04-01 03:22:27,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:22:27,847 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:22:28,053 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/Problem03_label33.c[55678,55691] [2023-04-01 03:22:28,069 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:22:28,086 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:22:28,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:28 WrapperNode [2023-04-01 03:22:28,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:22:28,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:22:28,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:22:28,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:22:28,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:28" (1/1) ... [2023-04-01 03:22:28,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:28" (1/1) ... [2023-04-01 03:22:28,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:28" (1/1) ... [2023-04-01 03:22:28,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:28" (1/1) ... [2023-04-01 03:22:28,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:28" (1/1) ... [2023-04-01 03:22:28,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:28" (1/1) ... [2023-04-01 03:22:28,255 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:28" (1/1) ... [2023-04-01 03:22:28,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:28" (1/1) ... [2023-04-01 03:22:28,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:22:28,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:22:28,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:22:28,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:22:28,283 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:28" (1/1) ... [2023-04-01 03:22:28,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:22:28,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:22:28,316 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 03:22:28,334 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 03:22:28,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:22:28,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:22:28,359 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:22:28,359 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:22:28,359 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:22:28,359 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:22:28,359 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:22:28,359 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:22:28,360 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:22:28,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:22:28,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:22:28,360 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:22:28,360 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:22:28,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:22:28,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:22:28,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:22:28,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:22:28,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:22:28,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:22:28,509 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:22:28,511 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:22:30,111 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:22:30,465 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:22:30,466 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:22:30,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:22:30 BoogieIcfgContainer [2023-04-01 03:22:30,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:22:30,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:22:30,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:22:30,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:22:30,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:22:27" (1/3) ... [2023-04-01 03:22:30,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e38e30a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:22:30, skipping insertion in model container [2023-04-01 03:22:30,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:28" (2/3) ... [2023-04-01 03:22:30,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e38e30a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:22:30, skipping insertion in model container [2023-04-01 03:22:30,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:22:30" (3/3) ... [2023-04-01 03:22:30,477 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label33.c [2023-04-01 03:22:30,495 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:22:30,495 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:22:30,551 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:22:30,558 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;@6b863879, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:22:30,558 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:22:30,566 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:22:30,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 03:22:30,580 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:22:30,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:22:30,581 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:22:30,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:22:30,586 INFO L85 PathProgramCache]: Analyzing trace with hash 597527664, now seen corresponding path program 1 times [2023-04-01 03:22:30,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:22:30,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115173243] [2023-04-01 03:22:30,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:22:30,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:22:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:22:31,713 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 03:22:31,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:22:31,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115173243] [2023-04-01 03:22:31,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115173243] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:22:31,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:22:31,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:22:31,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137700914] [2023-04-01 03:22:31,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:22:31,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:22:31,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:22:31,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:22:31,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:22:31,768 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 03:22:32,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:22:32,592 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-04-01 03:22:32,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:22:32,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 149 [2023-04-01 03:22:32,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:22:32,610 INFO L225 Difference]: With dead ends: 462 [2023-04-01 03:22:32,611 INFO L226 Difference]: Without dead ends: 301 [2023-04-01 03:22:32,615 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 03:22:32,618 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 34 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 03:22:32,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 70 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 03:22:32,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-01 03:22:32,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-04-01 03:22:32,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.7747440273037542) internal successors, (520), 293 states have internal predecessors, (520), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 03:22:32,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 529 transitions. [2023-04-01 03:22:32,678 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 529 transitions. Word has length 149 [2023-04-01 03:22:32,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:22:32,679 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 529 transitions. [2023-04-01 03:22:32,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 03:22:32,680 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 529 transitions. [2023-04-01 03:22:32,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-01 03:22:32,684 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:22:32,684 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:22:32,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:22:32,685 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:22:32,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:22:32,685 INFO L85 PathProgramCache]: Analyzing trace with hash -848554929, now seen corresponding path program 1 times [2023-04-01 03:22:32,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:22:32,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151513138] [2023-04-01 03:22:32,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:22:32,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:22:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:22:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:22:33,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:22:33,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151513138] [2023-04-01 03:22:33,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151513138] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:22:33,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:22:33,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:22:33,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638650762] [2023-04-01 03:22:33,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:22:33,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:22:33,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:22:33,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:22:33,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:22:33,313 INFO L87 Difference]: Start difference. First operand 301 states and 529 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 03:22:34,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:22:34,261 INFO L93 Difference]: Finished difference Result 917 states and 1632 transitions. [2023-04-01 03:22:34,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:22:34,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 161 [2023-04-01 03:22:34,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:22:34,270 INFO L225 Difference]: With dead ends: 917 [2023-04-01 03:22:34,270 INFO L226 Difference]: Without dead ends: 621 [2023-04-01 03:22:34,276 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 03:22:34,281 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 492 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 03:22:34,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 48 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 03:22:34,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2023-04-01 03:22:34,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 607. [2023-04-01 03:22:34,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 589 states have (on average 1.7215619694397284) internal successors, (1014), 595 states have internal predecessors, (1014), 6 states have call successors, (6), 6 states have call predecessors, (6), 11 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2023-04-01 03:22:34,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1046 transitions. [2023-04-01 03:22:34,344 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1046 transitions. Word has length 161 [2023-04-01 03:22:34,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:22:34,344 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 1046 transitions. [2023-04-01 03:22:34,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 03:22:34,345 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1046 transitions. [2023-04-01 03:22:34,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-04-01 03:22:34,350 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:22:34,350 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:22:34,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:22:34,351 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:22:34,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:22:34,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1298772486, now seen corresponding path program 1 times [2023-04-01 03:22:34,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:22:34,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319497150] [2023-04-01 03:22:34,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:22:34,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:22:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:22:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:22:35,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:22:35,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319497150] [2023-04-01 03:22:35,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319497150] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:22:35,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:22:35,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:22:35,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051204499] [2023-04-01 03:22:35,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:22:35,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:22:35,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:22:35,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:22:35,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:22:35,166 INFO L87 Difference]: Start difference. First operand 607 states and 1046 transitions. Second operand has 5 states, 5 states have (on average 34.0) internal successors, (170), 4 states have internal predecessors, (170), 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 03:22:36,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:22:36,111 INFO L93 Difference]: Finished difference Result 1883 states and 3375 transitions. [2023-04-01 03:22:36,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:22:36,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 4 states have internal predecessors, (170), 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 176 [2023-04-01 03:22:36,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:22:36,124 INFO L225 Difference]: With dead ends: 1883 [2023-04-01 03:22:36,125 INFO L226 Difference]: Without dead ends: 1281 [2023-04-01 03:22:36,134 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 03:22:36,137 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 489 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 03:22:36,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 40 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 03:22:36,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2023-04-01 03:22:36,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1257. [2023-04-01 03:22:36,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1200 states have (on average 1.5991666666666666) internal successors, (1919), 1237 states have internal predecessors, (1919), 10 states have call successors, (10), 10 states have call predecessors, (10), 46 states have return successors, (146), 9 states have call predecessors, (146), 9 states have call successors, (146) [2023-04-01 03:22:36,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 2075 transitions. [2023-04-01 03:22:36,221 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 2075 transitions. Word has length 176 [2023-04-01 03:22:36,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:22:36,221 INFO L495 AbstractCegarLoop]: Abstraction has 1257 states and 2075 transitions. [2023-04-01 03:22:36,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 4 states have internal predecessors, (170), 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 03:22:36,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 2075 transitions. [2023-04-01 03:22:36,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-04-01 03:22:36,230 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:22:36,230 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:22:36,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 03:22:36,231 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:22:36,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:22:36,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1395165660, now seen corresponding path program 1 times [2023-04-01 03:22:36,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:22:36,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557686244] [2023-04-01 03:22:36,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:22:36,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:22:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:22:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:22:36,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:22:36,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557686244] [2023-04-01 03:22:36,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557686244] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:22:36,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089156391] [2023-04-01 03:22:36,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:22:36,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:22:36,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:22:36,670 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 03:22:36,672 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 03:22:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:22:36,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:22:36,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:22:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:22:37,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:22:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:22:37,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089156391] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:22:37,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [676559107] [2023-04-01 03:22:37,292 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-04-01 03:22:37,292 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:22:37,297 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:22:37,302 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:22:37,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:22:38,214 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-04-01 03:22:48,370 WARN L223 SmtUtils]: Spent 8.67s on a formula simplification that was a NOOP. DAG size: 962 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)