/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem16_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:16:59,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:16:59,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:16:59,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:16:59,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:16:59,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:16:59,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:16:59,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:16:59,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:16:59,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:16:59,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:16:59,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:16:59,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:16:59,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:16:59,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:16:59,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:16:59,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:16:59,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:16:59,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:16:59,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:16:59,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:16:59,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:16:59,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:16:59,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:16:59,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 22:16:59,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:16:59,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:16:59,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:16:59,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:16:59,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:16:59,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:16:59,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:16:59,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:16:59,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:16:59,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:16:59,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:16:59,357 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 [2023-03-31 22:16:59,376 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:16:59,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:16:59,376 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:16:59,376 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:16:59,377 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:16:59,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:16:59,378 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:16:59,378 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:16:59,378 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:16:59,379 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:16:59,379 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:16:59,379 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:16:59,380 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:16:59,380 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:16:59,380 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:16:59,380 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:16:59,380 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:16:59,380 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:16:59,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:16:59,381 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:16:59,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:16:59,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:16:59,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:16:59,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:16:59,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:16:59,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:16:59,383 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:16:59,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:16:59,383 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:16:59,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:16:59,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:16:59,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:16:59,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:16:59,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:16:59,384 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:16:59,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:16:59,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:16:59,384 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:16:59,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:16:59,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:16:59,385 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:16:59,385 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:16:59,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:16:59,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:16:59,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:16:59,623 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:16:59,624 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:16:59,625 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label29.c [2023-03-31 22:17:00,817 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:17:01,128 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:17:01,128 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label29.c [2023-03-31 22:17:01,150 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0ff8f962/be12a4e40d354e06b4fd4d3e02127c7a/FLAGe21f8aa26 [2023-03-31 22:17:01,164 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0ff8f962/be12a4e40d354e06b4fd4d3e02127c7a [2023-03-31 22:17:01,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:17:01,167 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:17:01,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:17:01,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:17:01,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:17:01,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:17:01" (1/1) ... [2023-03-31 22:17:01,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b72dcb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:01, skipping insertion in model container [2023-03-31 22:17:01,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:17:01" (1/1) ... [2023-03-31 22:17:01,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:17:01,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:17:01,422 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/Problem16_label29.c[4907,4920] [2023-03-31 22:17:01,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:17:01,757 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:17:01,786 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/Problem16_label29.c[4907,4920] [2023-03-31 22:17:01,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:17:01,980 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:17:01,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:01 WrapperNode [2023-03-31 22:17:01,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:17:01,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:17:01,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:17:01,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:17:01,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:01" (1/1) ... [2023-03-31 22:17:02,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:01" (1/1) ... [2023-03-31 22:17:02,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:01" (1/1) ... [2023-03-31 22:17:02,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:01" (1/1) ... [2023-03-31 22:17:02,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:01" (1/1) ... [2023-03-31 22:17:02,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:01" (1/1) ... [2023-03-31 22:17:02,133 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:01" (1/1) ... [2023-03-31 22:17:02,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:01" (1/1) ... [2023-03-31 22:17:02,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:17:02,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:17:02,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:17:02,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:17:02,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:01" (1/1) ... [2023-03-31 22:17:02,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:17:02,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:17:02,190 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) [2023-03-31 22:17:02,202 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 [2023-03-31 22:17:02,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:17:02,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:17:02,225 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:17:02,225 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:17:02,225 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:17:02,225 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:17:02,226 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:17:02,226 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:17:02,226 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:17:02,226 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:17:02,226 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:17:02,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:17:02,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:17:02,226 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:17:02,226 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:17:02,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:17:02,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:17:02,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:17:02,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:17:02,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:17:02,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:17:02,288 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:17:02,290 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:17:04,049 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:17:05,145 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:17:05,145 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:17:05,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:17:05 BoogieIcfgContainer [2023-03-31 22:17:05,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:17:05,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:17:05,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:17:05,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:17:05,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:17:01" (1/3) ... [2023-03-31 22:17:05,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49233055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:17:05, skipping insertion in model container [2023-03-31 22:17:05,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:01" (2/3) ... [2023-03-31 22:17:05,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49233055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:17:05, skipping insertion in model container [2023-03-31 22:17:05,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:17:05" (3/3) ... [2023-03-31 22:17:05,158 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label29.c [2023-03-31 22:17:05,173 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:17:05,174 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:17:05,231 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:17:05,238 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;@5174d03d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:17:05,238 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:17:05,244 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:17:05,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:17:05,250 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:05,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:17:05,251 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:05,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:05,256 INFO L85 PathProgramCache]: Analyzing trace with hash -706733210, now seen corresponding path program 1 times [2023-03-31 22:17:05,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:05,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836747429] [2023-03-31 22:17:05,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:05,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:17:05,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:05,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836747429] [2023-03-31 22:17:05,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836747429] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:17:05,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:17:05,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:17:05,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487516152] [2023-03-31 22:17:05,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:17:05,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:17:05,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:17:05,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:17:05,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:17:05,588 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2023-03-31 22:17:06,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:17:06,838 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:17:06,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:17:06,840 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 [2023-03-31 22:17:06,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:17:06,852 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:17:06,852 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:17:06,857 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 [2023-03-31 22:17:06,859 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 300 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:17:06,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 74 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-31 22:17:06,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:17:06,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 467. [2023-03-31 22:17:06,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 457 states have (on average 1.87308533916849) internal successors, (856), 457 states have internal predecessors, (856), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 22:17:06,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 867 transitions. [2023-03-31 22:17:06,916 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 867 transitions. Word has length 11 [2023-03-31 22:17:06,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:17:06,916 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 867 transitions. [2023-03-31 22:17:06,917 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) [2023-03-31 22:17:06,917 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 867 transitions. [2023-03-31 22:17:06,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-03-31 22:17:06,919 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:06,919 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:17:06,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:17:06,920 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:06,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:06,920 INFO L85 PathProgramCache]: Analyzing trace with hash -850585637, now seen corresponding path program 1 times [2023-03-31 22:17:06,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:06,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748609264] [2023-03-31 22:17:06,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:06,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:17:07,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:07,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748609264] [2023-03-31 22:17:07,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748609264] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:17:07,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:17:07,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:17:07,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233904123] [2023-03-31 22:17:07,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:17:07,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:17:07,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:17:07,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:17:07,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:17:07,223 INFO L87 Difference]: Start difference. First operand 467 states and 867 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2023-03-31 22:17:08,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:17:08,533 INFO L93 Difference]: Finished difference Result 1405 states and 2628 transitions. [2023-03-31 22:17:08,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:17:08,535 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 59 [2023-03-31 22:17:08,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:17:08,541 INFO L225 Difference]: With dead ends: 1405 [2023-03-31 22:17:08,541 INFO L226 Difference]: Without dead ends: 943 [2023-03-31 22:17:08,542 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 [2023-03-31 22:17:08,543 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 922 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:17:08,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 45 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-31 22:17:08,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2023-03-31 22:17:08,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 714. [2023-03-31 22:17:08,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 695 states have (on average 1.720863309352518) internal successors, (1196), 698 states have internal predecessors, (1196), 8 states have call successors, (8), 8 states have call predecessors, (8), 10 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2023-03-31 22:17:08,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1225 transitions. [2023-03-31 22:17:08,579 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1225 transitions. Word has length 59 [2023-03-31 22:17:08,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:17:08,579 INFO L495 AbstractCegarLoop]: Abstraction has 714 states and 1225 transitions. [2023-03-31 22:17:08,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2023-03-31 22:17:08,580 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1225 transitions. [2023-03-31 22:17:08,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-03-31 22:17:08,583 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:08,583 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:17:08,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:17:08,584 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:08,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:08,584 INFO L85 PathProgramCache]: Analyzing trace with hash 2140572864, now seen corresponding path program 1 times [2023-03-31 22:17:08,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:08,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897489738] [2023-03-31 22:17:08,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:08,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:17:09,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:09,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897489738] [2023-03-31 22:17:09,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897489738] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:17:09,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856165406] [2023-03-31 22:17:09,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:09,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:17:09,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:17:09,017 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) [2023-03-31 22:17:09,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:17:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:09,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:17:09,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:17:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:17:09,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:17:09,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856165406] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:17:09,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:17:09,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:17:09,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755501720] [2023-03-31 22:17:09,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:17:09,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:17:09,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:17:09,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:17:09,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:17:09,320 INFO L87 Difference]: Start difference. First operand 714 states and 1225 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 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) [2023-03-31 22:17:10,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:17:10,833 INFO L93 Difference]: Finished difference Result 1907 states and 3294 transitions. [2023-03-31 22:17:10,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:17:10,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 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 115 [2023-03-31 22:17:10,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:17:10,840 INFO L225 Difference]: With dead ends: 1907 [2023-03-31 22:17:10,840 INFO L226 Difference]: Without dead ends: 1198 [2023-03-31 22:17:10,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-03-31 22:17:10,843 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 799 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:17:10,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 46 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-31 22:17:10,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2023-03-31 22:17:10,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1176. [2023-03-31 22:17:10,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1148 states have (on average 1.5609756097560976) internal successors, (1792), 1154 states have internal predecessors, (1792), 11 states have call successors, (11), 11 states have call predecessors, (11), 16 states have return successors, (50), 10 states have call predecessors, (50), 10 states have call successors, (50) [2023-03-31 22:17:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1853 transitions. [2023-03-31 22:17:10,880 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1853 transitions. Word has length 115 [2023-03-31 22:17:10,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:17:10,881 INFO L495 AbstractCegarLoop]: Abstraction has 1176 states and 1853 transitions. [2023-03-31 22:17:10,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 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) [2023-03-31 22:17:10,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1853 transitions. [2023-03-31 22:17:10,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-03-31 22:17:10,887 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:10,887 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:17:10,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 22:17:11,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:17:11,095 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:11,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:11,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1471208937, now seen corresponding path program 1 times [2023-03-31 22:17:11,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:11,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912600516] [2023-03-31 22:17:11,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:11,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-03-31 22:17:11,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:11,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912600516] [2023-03-31 22:17:11,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912600516] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:17:11,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446419147] [2023-03-31 22:17:11,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:11,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:17:11,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:17:11,470 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) [2023-03-31 22:17:11,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:17:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:11,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:17:11,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:17:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:17:11,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:17:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-03-31 22:17:11,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446419147] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:17:11,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1202036336] [2023-03-31 22:17:11,991 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-03-31 22:17:11,991 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:17:11,997 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:17:12,001 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:17:12,002 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:17:12,117 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-03-31 22:17:12,336 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 40 [2023-03-31 22:17:12,597 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2023-03-31 22:17:13,304 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 50 for LOIs [2023-03-31 22:17:13,420 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 40 [2023-03-31 22:17:14,935 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2023-03-31 22:17:15,210 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 26422 conjuctions. This might take some time... [2023-03-31 22:17:17,792 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1452 conjuctions.