/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/Problem02_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:16:35,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:16:35,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:16:35,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:16:35,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:16:35,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:16:35,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:16:35,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:16:35,368 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:16:35,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:16:35,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:16:35,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:16:35,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:16:35,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:16:35,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:16:35,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:16:35,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:16:35,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:16:35,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:16:35,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:16:35,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:16:35,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:16:35,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:16:35,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:16:35,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 03:16:35,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:16:35,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:16:35,388 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:16:35,392 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:16:35,394 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:16:35,394 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:16:35,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:16:35,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:16:35,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:16:35,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:16:35,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:16:35,399 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 03:16:35,433 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:16:35,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:16:35,434 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:16:35,434 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:16:35,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:16:35,435 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:16:35,435 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:16:35,435 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:16:35,435 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:16:35,436 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:16:35,436 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:16:35,436 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:16:35,437 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:16:35,437 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:16:35,437 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:16:35,437 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:16:35,437 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:16:35,437 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:16:35,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:16:35,438 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:16:35,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:16:35,438 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:16:35,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:16:35,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:16:35,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:16:35,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:16:35,439 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:16:35,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:16:35,439 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:16:35,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:16:35,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:16:35,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:16:35,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:16:35,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:16:35,440 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:16:35,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:16:35,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:16:35,441 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:16:35,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:16:35,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:16:35,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:16:35,441 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:16:35,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:16:35,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:16:35,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:16:35,695 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:16:35,696 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:16:35,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label25.c [2023-04-01 03:16:36,937 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:16:37,229 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:16:37,230 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label25.c [2023-04-01 03:16:37,238 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dacfd440c/d79464b40385417a822450ea3df46879/FLAG64302f0bd [2023-04-01 03:16:37,252 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dacfd440c/d79464b40385417a822450ea3df46879 [2023-04-01 03:16:37,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:16:37,255 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:16:37,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:16:37,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:16:37,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:16:37,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:16:37" (1/1) ... [2023-04-01 03:16:37,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@216cd8ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:16:37, skipping insertion in model container [2023-04-01 03:16:37,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:16:37" (1/1) ... [2023-04-01 03:16:37,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:16:37,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:16:37,627 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/Problem02_label25.c[20652,20665] [2023-04-01 03:16:37,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:16:37,682 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:16:37,788 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/Problem02_label25.c[20652,20665] [2023-04-01 03:16:37,793 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:16:37,807 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:16:37,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:16:37 WrapperNode [2023-04-01 03:16:37,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:16:37,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:16:37,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:16:37,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:16:37,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:16:37" (1/1) ... [2023-04-01 03:16:37,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:16:37" (1/1) ... [2023-04-01 03:16:37,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:16:37" (1/1) ... [2023-04-01 03:16:37,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:16:37" (1/1) ... [2023-04-01 03:16:37,880 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:16:37" (1/1) ... [2023-04-01 03:16:37,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:16:37" (1/1) ... [2023-04-01 03:16:37,895 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:16:37" (1/1) ... [2023-04-01 03:16:37,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:16:37" (1/1) ... [2023-04-01 03:16:37,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:16:37,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:16:37,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:16:37,914 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:16:37,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:16:37" (1/1) ... [2023-04-01 03:16:37,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:16:37,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:16:37,946 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 03:16:37,972 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 03:16:37,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:16:37,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:16:37,987 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:16:37,988 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:16:37,989 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:16:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:16:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:16:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:16:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:16:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:16:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:16:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:16:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:16:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:16:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:16:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:16:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:16:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:16:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:16:38,079 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:16:38,081 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:16:38,890 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:16:39,169 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:16:39,169 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:16:39,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:16:39 BoogieIcfgContainer [2023-04-01 03:16:39,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:16:39,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:16:39,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:16:39,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:16:39,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:16:37" (1/3) ... [2023-04-01 03:16:39,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248610b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:16:39, skipping insertion in model container [2023-04-01 03:16:39,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:16:37" (2/3) ... [2023-04-01 03:16:39,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248610b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:16:39, skipping insertion in model container [2023-04-01 03:16:39,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:16:39" (3/3) ... [2023-04-01 03:16:39,182 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label25.c [2023-04-01 03:16:39,198 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:16:39,198 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:16:39,253 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:16:39,260 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;@5b7c2b74, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:16:39,261 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:16:39,265 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 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 03:16:39,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 03:16:39,274 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:16:39,274 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] [2023-04-01 03:16:39,275 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:16:39,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:16:39,280 INFO L85 PathProgramCache]: Analyzing trace with hash -2027403304, now seen corresponding path program 1 times [2023-04-01 03:16:39,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:16:39,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704051182] [2023-04-01 03:16:39,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:16:39,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:16:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:16:39,934 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 03:16:39,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:16:39,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704051182] [2023-04-01 03:16:39,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704051182] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:16:39,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:16:39,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:16:39,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042268095] [2023-04-01 03:16:39,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:16:39,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:16:39,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:16:39,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:16:39,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:16:39,989 INFO L87 Difference]: Start difference. First operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 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 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 03:16:40,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:16:40,337 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-04-01 03:16:40,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:16:40,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 86 [2023-04-01 03:16:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:16:40,391 INFO L225 Difference]: With dead ends: 273 [2023-04-01 03:16:40,391 INFO L226 Difference]: Without dead ends: 175 [2023-04-01 03:16:40,394 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 03:16:40,397 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 25 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:16:40,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 76 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:16:40,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-01 03:16:40,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-04-01 03:16:40,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.81437125748503) internal successors, (303), 167 states have internal predecessors, (303), 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 03:16:40,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2023-04-01 03:16:40,446 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2023-04-01 03:16:40,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:16:40,447 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2023-04-01 03:16:40,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 03:16:40,448 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2023-04-01 03:16:40,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 03:16:40,452 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:16:40,452 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:16:40,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:16:40,452 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:16:40,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:16:40,453 INFO L85 PathProgramCache]: Analyzing trace with hash -78192732, now seen corresponding path program 1 times [2023-04-01 03:16:40,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:16:40,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823079897] [2023-04-01 03:16:40,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:16:40,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:16:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:16:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:16:41,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:16:41,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823079897] [2023-04-01 03:16:41,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823079897] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:16:41,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:16:41,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:16:41,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897588185] [2023-04-01 03:16:41,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:16:41,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:16:41,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:16:41,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:16:41,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:16:41,244 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 03:16:41,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:16:41,800 INFO L93 Difference]: Finished difference Result 535 states and 970 transitions. [2023-04-01 03:16:41,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:16:41,801 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 94 [2023-04-01 03:16:41,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:16:41,810 INFO L225 Difference]: With dead ends: 535 [2023-04-01 03:16:41,811 INFO L226 Difference]: Without dead ends: 365 [2023-04-01 03:16:41,812 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 03:16:41,818 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 266 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 03:16:41,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 47 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 03:16:41,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-04-01 03:16:41,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 359. [2023-04-01 03:16:41,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 339 states have (on average 1.6371681415929205) internal successors, (555), 347 states have internal predecessors, (555), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2023-04-01 03:16:41,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 590 transitions. [2023-04-01 03:16:41,864 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 590 transitions. Word has length 94 [2023-04-01 03:16:41,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:16:41,864 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 590 transitions. [2023-04-01 03:16:41,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 03:16:41,864 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 590 transitions. [2023-04-01 03:16:41,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-01 03:16:41,868 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:16:41,869 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 03:16:41,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:16:41,869 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:16:41,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:16:41,869 INFO L85 PathProgramCache]: Analyzing trace with hash 255929402, now seen corresponding path program 1 times [2023-04-01 03:16:41,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:16:41,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286197467] [2023-04-01 03:16:41,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:16:41,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:16:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:16:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:16:42,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:16:42,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286197467] [2023-04-01 03:16:42,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286197467] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:16:42,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:16:42,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:16:42,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670276708] [2023-04-01 03:16:42,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:16:42,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:16:42,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:16:42,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:16:42,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:16:42,081 INFO L87 Difference]: Start difference. First operand 359 states and 590 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:16:42,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:16:42,432 INFO L93 Difference]: Finished difference Result 1063 states and 1809 transitions. [2023-04-01 03:16:42,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:16:42,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 99 [2023-04-01 03:16:42,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:16:42,438 INFO L225 Difference]: With dead ends: 1063 [2023-04-01 03:16:42,438 INFO L226 Difference]: Without dead ends: 709 [2023-04-01 03:16:42,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 03:16:42,441 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:16:42,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 34 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:16:42,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2023-04-01 03:16:42,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 709. [2023-04-01 03:16:42,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 674 states have (on average 1.6023738872403561) internal successors, (1080), 689 states have internal predecessors, (1080), 10 states have call successors, (10), 10 states have call predecessors, (10), 24 states have return successors, (97), 9 states have call predecessors, (97), 9 states have call successors, (97) [2023-04-01 03:16:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1187 transitions. [2023-04-01 03:16:42,479 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1187 transitions. Word has length 99 [2023-04-01 03:16:42,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:16:42,479 INFO L495 AbstractCegarLoop]: Abstraction has 709 states and 1187 transitions. [2023-04-01 03:16:42,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:16:42,480 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1187 transitions. [2023-04-01 03:16:42,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-01 03:16:42,487 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:16:42,487 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2023-04-01 03:16:42,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 03:16:42,487 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:16:42,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:16:42,488 INFO L85 PathProgramCache]: Analyzing trace with hash 933502096, now seen corresponding path program 1 times [2023-04-01 03:16:42,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:16:42,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433427226] [2023-04-01 03:16:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:16:42,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:16:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:16:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 03:16:42,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:16:42,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433427226] [2023-04-01 03:16:42,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433427226] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:16:42,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646817791] [2023-04-01 03:16:42,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:16:42,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:16:42,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:16:42,881 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 03:16:42,890 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 03:16:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:16:43,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:16:43,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:16:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:16:43,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:16:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:16:43,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646817791] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:16:43,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1995899231] [2023-04-01 03:16:43,295 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-04-01 03:16:43,296 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:16:43,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:16:43,307 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:16:43,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:16:43,640 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 65 for LOIs [2023-04-01 03:16:50,539 WARN L223 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 488 DAG size of output: 489 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)