/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/Problem01_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:14:13,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:14:13,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:14:13,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:14:13,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:14:13,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:14:13,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:14:13,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:14:13,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:14:13,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:14:13,204 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:14:13,206 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:14:13,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:14:13,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:14:13,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:14:13,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:14:13,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:14:13,210 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:14:13,212 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:14:13,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:14:13,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:14:13,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:14:13,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:14:13,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:14:13,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 03:14:13,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:14:13,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:14:13,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:14:13,230 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:14:13,230 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:14:13,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:14:13,231 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:14:13,231 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:14:13,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:14:13,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:14:13,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:14:13,233 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 03:14:13,256 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:14:13,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:14:13,257 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:14:13,257 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:14:13,257 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:14:13,258 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:14:13,258 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:14:13,258 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:14:13,258 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:14:13,258 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:14:13,259 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:14:13,259 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:14:13,259 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:14:13,259 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:14:13,259 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:14:13,259 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:14:13,259 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:14:13,259 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:14:13,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:14:13,260 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:14:13,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:14:13,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:14:13,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:14:13,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:14:13,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:14:13,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:14:13,261 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:14:13,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:14:13,261 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:14:13,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:14:13,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:14:13,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:14:13,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:14:13,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:14:13,262 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:14:13,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:14:13,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:14:13,262 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:14:13,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:14:13,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:14:13,263 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:14:13,263 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:14:13,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:14:13,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:14:13,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:14:13,464 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:14:13,472 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:14:13,473 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label56.c [2023-04-01 03:14:14,417 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:14:14,614 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:14:14,614 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label56.c [2023-04-01 03:14:14,621 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/110686672/72ea7a64a73e4f14927969e219d362c6/FLAGf415a356d [2023-04-01 03:14:14,634 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/110686672/72ea7a64a73e4f14927969e219d362c6 [2023-04-01 03:14:14,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:14:14,637 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:14:14,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:14:14,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:14:14,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:14:14,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:14:14" (1/1) ... [2023-04-01 03:14:14,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@633b9695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:14, skipping insertion in model container [2023-04-01 03:14:14,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:14:14" (1/1) ... [2023-04-01 03:14:14,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:14:14,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:14:14,932 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/Problem01_label56.c[15002,15015] [2023-04-01 03:14:14,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:14:14,982 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:14:15,036 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/Problem01_label56.c[15002,15015] [2023-04-01 03:14:15,065 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:14:15,079 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:14:15,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:15 WrapperNode [2023-04-01 03:14:15,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:14:15,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:14:15,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:14:15,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:14:15,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:15" (1/1) ... [2023-04-01 03:14:15,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:15" (1/1) ... [2023-04-01 03:14:15,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:15" (1/1) ... [2023-04-01 03:14:15,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:15" (1/1) ... [2023-04-01 03:14:15,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:15" (1/1) ... [2023-04-01 03:14:15,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:15" (1/1) ... [2023-04-01 03:14:15,147 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:15" (1/1) ... [2023-04-01 03:14:15,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:15" (1/1) ... [2023-04-01 03:14:15,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:14:15,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:14:15,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:14:15,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:14:15,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:15" (1/1) ... [2023-04-01 03:14:15,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:14:15,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:14:15,203 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 03:14:15,209 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 03:14:15,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:14:15,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:14:15,233 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:14:15,234 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:14:15,234 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:14:15,234 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:14:15,234 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:14:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:14:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:14:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:14:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:14:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:14:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:14:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:14:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:14:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:14:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:14:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:14:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:14:15,304 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:14:15,305 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:14:16,015 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:14:16,204 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:14:16,205 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:14:16,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:14:16 BoogieIcfgContainer [2023-04-01 03:14:16,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:14:16,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:14:16,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:14:16,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:14:16,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:14:14" (1/3) ... [2023-04-01 03:14:16,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10191761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:14:16, skipping insertion in model container [2023-04-01 03:14:16,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:15" (2/3) ... [2023-04-01 03:14:16,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10191761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:14:16, skipping insertion in model container [2023-04-01 03:14:16,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:14:16" (3/3) ... [2023-04-01 03:14:16,216 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label56.c [2023-04-01 03:14:16,231 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:14:16,231 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:14:16,287 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:14:16,293 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;@7a2709c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:14:16,294 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:14:16,298 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 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 03:14:16,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 03:14:16,308 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:14:16,309 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] [2023-04-01 03:14:16,309 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:14:16,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:14:16,316 INFO L85 PathProgramCache]: Analyzing trace with hash -2062188941, now seen corresponding path program 1 times [2023-04-01 03:14:16,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:14:16,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262180384] [2023-04-01 03:14:16,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:16,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:14:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:16,830 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 03:14:16,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:14:16,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262180384] [2023-04-01 03:14:16,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262180384] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:14:16,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:14:16,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:14:16,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044086964] [2023-04-01 03:14:16,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:14:16,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:14:16,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:14:16,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:14:16,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:14:16,874 INFO L87 Difference]: Start difference. First operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 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 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 03:14:17,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:14:17,194 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2023-04-01 03:14:17,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:14:17,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 77 [2023-04-01 03:14:17,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:14:17,210 INFO L225 Difference]: With dead ends: 246 [2023-04-01 03:14:17,210 INFO L226 Difference]: Without dead ends: 157 [2023-04-01 03:14:17,213 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 03:14:17,216 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:14:17,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 42 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:14:17,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-04-01 03:14:17,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-04-01 03:14:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.8120805369127517) internal successors, (270), 149 states have internal predecessors, (270), 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 03:14:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 279 transitions. [2023-04-01 03:14:17,253 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 279 transitions. Word has length 77 [2023-04-01 03:14:17,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:14:17,254 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 279 transitions. [2023-04-01 03:14:17,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 03:14:17,254 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 279 transitions. [2023-04-01 03:14:17,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 03:14:17,257 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:14:17,257 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 03:14:17,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:14:17,258 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:14:17,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:14:17,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1470074573, now seen corresponding path program 1 times [2023-04-01 03:14:17,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:14:17,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255920428] [2023-04-01 03:14:17,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:17,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:14:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:14:17,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:14:17,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255920428] [2023-04-01 03:14:17,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255920428] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:14:17,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:14:17,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:14:17,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714613553] [2023-04-01 03:14:17,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:14:17,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:14:17,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:14:17,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:14:17,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:14:17,458 INFO L87 Difference]: Start difference. First operand 157 states and 279 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 03:14:17,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:14:17,806 INFO L93 Difference]: Finished difference Result 402 states and 725 transitions. [2023-04-01 03:14:17,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:14:17,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 87 [2023-04-01 03:14:17,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:14:17,810 INFO L225 Difference]: With dead ends: 402 [2023-04-01 03:14:17,810 INFO L226 Difference]: Without dead ends: 250 [2023-04-01 03:14:17,811 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 03:14:17,812 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 261 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:14:17,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 43 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:14:17,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-04-01 03:14:17,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 238. [2023-04-01 03:14:17,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 225 states have (on average 1.7244444444444444) internal successors, (388), 228 states have internal predecessors, (388), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-01 03:14:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 407 transitions. [2023-04-01 03:14:17,846 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 407 transitions. Word has length 87 [2023-04-01 03:14:17,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:14:17,849 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 407 transitions. [2023-04-01 03:14:17,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 03:14:17,850 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 407 transitions. [2023-04-01 03:14:17,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 03:14:17,854 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:14:17,855 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 03:14:17,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:14:17,855 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:14:17,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:14:17,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1308880541, now seen corresponding path program 1 times [2023-04-01 03:14:17,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:14:17,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977562969] [2023-04-01 03:14:17,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:17,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:14:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 03:14:18,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:14:18,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977562969] [2023-04-01 03:14:18,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977562969] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:14:18,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181593775] [2023-04-01 03:14:18,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:18,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:14:18,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:14:18,091 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 03:14:18,092 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 03:14:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:18,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:14:18,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:14:18,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:14:18,349 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:14:18,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181593775] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:14:18,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:14:18,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 03:14:18,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028868886] [2023-04-01 03:14:18,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:14:18,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:14:18,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:14:18,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:14:18,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:14:18,354 INFO L87 Difference]: Start difference. First operand 238 states and 407 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 03:14:18,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:14:18,580 INFO L93 Difference]: Finished difference Result 700 states and 1242 transitions. [2023-04-01 03:14:18,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:14:18,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 88 [2023-04-01 03:14:18,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:14:18,588 INFO L225 Difference]: With dead ends: 700 [2023-04-01 03:14:18,588 INFO L226 Difference]: Without dead ends: 467 [2023-04-01 03:14:18,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:14:18,593 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:14:18,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 166 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 03:14:18,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2023-04-01 03:14:18,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 467. [2023-04-01 03:14:18,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 446 states have (on average 1.5269058295964126) internal successors, (681), 451 states have internal predecessors, (681), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (48), 7 states have call predecessors, (48), 7 states have call successors, (48) [2023-04-01 03:14:18,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 737 transitions. [2023-04-01 03:14:18,639 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 737 transitions. Word has length 88 [2023-04-01 03:14:18,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:14:18,641 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 737 transitions. [2023-04-01 03:14:18,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 03:14:18,642 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 737 transitions. [2023-04-01 03:14:18,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 03:14:18,644 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:14:18,645 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:14:18,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 03:14:18,852 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 [2023-04-01 03:14:18,852 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:14:18,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:14:18,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2050519017, now seen corresponding path program 1 times [2023-04-01 03:14:18,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:14:18,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017271931] [2023-04-01 03:14:18,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:18,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:14:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:14:19,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:14:19,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017271931] [2023-04-01 03:14:19,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017271931] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:14:19,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:14:19,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:14:19,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17413463] [2023-04-01 03:14:19,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:14:19,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:14:19,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:14:19,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:14:19,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:14:19,070 INFO L87 Difference]: Start difference. First operand 467 states and 737 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 03:14:19,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:14:19,412 INFO L93 Difference]: Finished difference Result 1358 states and 2246 transitions. [2023-04-01 03:14:19,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:14:19,421 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 03:14:19,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:14:19,425 INFO L225 Difference]: With dead ends: 1358 [2023-04-01 03:14:19,425 INFO L226 Difference]: Without dead ends: 730 [2023-04-01 03:14:19,427 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 03:14:19,427 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 241 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:14:19,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 49 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:14:19,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2023-04-01 03:14:19,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 643. [2023-04-01 03:14:19,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 605 states have (on average 1.3289256198347108) internal successors, (804), 623 states have internal predecessors, (804), 10 states have call successors, (10), 10 states have call predecessors, (10), 27 states have return successors, (88), 9 states have call predecessors, (88), 9 states have call successors, (88) [2023-04-01 03:14:19,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 902 transitions. [2023-04-01 03:14:19,452 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 902 transitions. Word has length 94 [2023-04-01 03:14:19,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:14:19,452 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 902 transitions. [2023-04-01 03:14:19,452 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 03:14:19,452 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 902 transitions. [2023-04-01 03:14:19,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-01 03:14:19,454 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:14:19,454 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 03:14:19,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 03:14:19,455 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:14:19,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:14:19,455 INFO L85 PathProgramCache]: Analyzing trace with hash 144040439, now seen corresponding path program 1 times [2023-04-01 03:14:19,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:14:19,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589873998] [2023-04-01 03:14:19,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:19,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:14:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:14:19,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:14:19,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589873998] [2023-04-01 03:14:19,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589873998] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:14:19,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:14:19,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:14:19,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492737721] [2023-04-01 03:14:19,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:14:19,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:14:19,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:14:19,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:14:19,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:14:19,808 INFO L87 Difference]: Start difference. First operand 643 states and 902 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 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 03:14:20,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:14:20,144 INFO L93 Difference]: Finished difference Result 1384 states and 1982 transitions. [2023-04-01 03:14:20,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:14:20,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 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 110 [2023-04-01 03:14:20,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:14:20,156 INFO L225 Difference]: With dead ends: 1384 [2023-04-01 03:14:20,156 INFO L226 Difference]: Without dead ends: 746 [2023-04-01 03:14:20,158 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 03:14:20,159 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 180 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:14:20,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 46 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:14:20,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2023-04-01 03:14:20,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 736. [2023-04-01 03:14:20,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 687 states have (on average 1.2940320232896652) internal successors, (889), 714 states have internal predecessors, (889), 11 states have call successors, (11), 11 states have call predecessors, (11), 37 states have return successors, (126), 10 states have call predecessors, (126), 10 states have call successors, (126) [2023-04-01 03:14:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1026 transitions. [2023-04-01 03:14:20,203 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1026 transitions. Word has length 110 [2023-04-01 03:14:20,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:14:20,204 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 1026 transitions. [2023-04-01 03:14:20,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 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 03:14:20,204 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1026 transitions. [2023-04-01 03:14:20,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-04-01 03:14:20,207 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:14:20,207 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:14:20,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 03:14:20,207 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:14:20,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:14:20,208 INFO L85 PathProgramCache]: Analyzing trace with hash 338295331, now seen corresponding path program 1 times [2023-04-01 03:14:20,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:14:20,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524940859] [2023-04-01 03:14:20,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:20,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:14:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:14:20,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:14:20,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524940859] [2023-04-01 03:14:20,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524940859] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:14:20,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998643848] [2023-04-01 03:14:20,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:20,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:14:20,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:14:20,506 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:14:20,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 03:14:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:20,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 03:14:20,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:14:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 03:14:20,717 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:14:20,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998643848] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:14:20,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:14:20,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 03:14:20,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173784020] [2023-04-01 03:14:20,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:14:20,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:14:20,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:14:20,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:14:20,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 03:14:20,719 INFO L87 Difference]: Start difference. First operand 736 states and 1026 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:14:20,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:14:20,925 INFO L93 Difference]: Finished difference Result 1929 states and 2805 transitions. [2023-04-01 03:14:20,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:14:20,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 135 [2023-04-01 03:14:20,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:14:20,930 INFO L225 Difference]: With dead ends: 1929 [2023-04-01 03:14:20,931 INFO L226 Difference]: Without dead ends: 1198 [2023-04-01 03:14:20,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 03:14:20,934 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:14:20,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 39 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 03:14:20,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2023-04-01 03:14:20,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1119. [2023-04-01 03:14:20,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1056 states have (on average 1.2840909090909092) internal successors, (1356), 1087 states have internal predecessors, (1356), 16 states have call successors, (16), 16 states have call predecessors, (16), 46 states have return successors, (218), 15 states have call predecessors, (218), 15 states have call successors, (218) [2023-04-01 03:14:20,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1590 transitions. [2023-04-01 03:14:20,968 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1590 transitions. Word has length 135 [2023-04-01 03:14:20,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:14:20,969 INFO L495 AbstractCegarLoop]: Abstraction has 1119 states and 1590 transitions. [2023-04-01 03:14:20,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:14:20,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1590 transitions. [2023-04-01 03:14:20,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-04-01 03:14:20,975 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:14:20,975 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:14:20,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 03:14:21,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 03:14:21,183 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:14:21,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:14:21,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1780590829, now seen corresponding path program 1 times [2023-04-01 03:14:21,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:14:21,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619195406] [2023-04-01 03:14:21,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:21,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:14:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 03:14:21,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:14:21,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619195406] [2023-04-01 03:14:21,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619195406] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:14:21,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761643114] [2023-04-01 03:14:21,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:21,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:14:21,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:14:21,421 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:14:21,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 03:14:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:21,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 03:14:21,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:14:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 03:14:21,635 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:14:21,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761643114] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:14:21,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:14:21,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 03:14:21,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395272008] [2023-04-01 03:14:21,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:14:21,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:14:21,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:14:21,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:14:21,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:14:21,637 INFO L87 Difference]: Start difference. First operand 1119 states and 1590 transitions. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 03:14:21,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:14:21,928 INFO L93 Difference]: Finished difference Result 2986 states and 4557 transitions. [2023-04-01 03:14:21,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 03:14:21,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 143 [2023-04-01 03:14:21,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:14:21,938 INFO L225 Difference]: With dead ends: 2986 [2023-04-01 03:14:21,938 INFO L226 Difference]: Without dead ends: 1947 [2023-04-01 03:14:21,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 03:14:21,941 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 227 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:14:21,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 38 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 03:14:21,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2023-04-01 03:14:21,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1903. [2023-04-01 03:14:21,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1803 states have (on average 1.242928452579035) internal successors, (2241), 1851 states have internal predecessors, (2241), 26 states have call successors, (26), 26 states have call predecessors, (26), 73 states have return successors, (360), 25 states have call predecessors, (360), 25 states have call successors, (360) [2023-04-01 03:14:21,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 2627 transitions. [2023-04-01 03:14:21,993 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 2627 transitions. Word has length 143 [2023-04-01 03:14:21,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:14:21,994 INFO L495 AbstractCegarLoop]: Abstraction has 1903 states and 2627 transitions. [2023-04-01 03:14:21,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 03:14:21,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 2627 transitions. [2023-04-01 03:14:21,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-04-01 03:14:21,998 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:14:21,998 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-04-01 03:14:22,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 03:14:22,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:14:22,207 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:14:22,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:14:22,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1327844349, now seen corresponding path program 1 times [2023-04-01 03:14:22,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:14:22,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194271464] [2023-04-01 03:14:22,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:22,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:14:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-04-01 03:14:22,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:14:22,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194271464] [2023-04-01 03:14:22,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194271464] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:14:22,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993113184] [2023-04-01 03:14:22,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:22,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:14:22,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:14:22,471 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:14:22,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 03:14:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:22,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:14:22,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:14:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 03:14:22,639 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:14:22,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993113184] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:14:22,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:14:22,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 03:14:22,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218360997] [2023-04-01 03:14:22,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:14:22,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:14:22,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:14:22,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:14:22,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:14:22,640 INFO L87 Difference]: Start difference. First operand 1903 states and 2627 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:14:22,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:14:22,826 INFO L93 Difference]: Finished difference Result 4176 states and 5919 transitions. [2023-04-01 03:14:22,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:14:22,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 151 [2023-04-01 03:14:22,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:14:22,835 INFO L225 Difference]: With dead ends: 4176 [2023-04-01 03:14:22,835 INFO L226 Difference]: Without dead ends: 2353 [2023-04-01 03:14:22,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:14:22,839 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 24 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:14:22,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:14:22,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2023-04-01 03:14:22,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 2203. [2023-04-01 03:14:22,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2095 states have (on average 1.2252983293556086) internal successors, (2567), 2143 states have internal predecessors, (2567), 30 states have call successors, (30), 30 states have call predecessors, (30), 77 states have return successors, (392), 29 states have call predecessors, (392), 29 states have call successors, (392) [2023-04-01 03:14:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 2989 transitions. [2023-04-01 03:14:22,895 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 2989 transitions. Word has length 151 [2023-04-01 03:14:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:14:22,896 INFO L495 AbstractCegarLoop]: Abstraction has 2203 states and 2989 transitions. [2023-04-01 03:14:22,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:14:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 2989 transitions. [2023-04-01 03:14:22,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-04-01 03:14:22,901 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:14:22,901 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 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] [2023-04-01 03:14:22,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 03:14:23,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:14:23,108 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:14:23,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:14:23,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1557442513, now seen corresponding path program 1 times [2023-04-01 03:14:23,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:14:23,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185309965] [2023-04-01 03:14:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:23,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:14:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 107 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:14:23,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:14:23,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185309965] [2023-04-01 03:14:23,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185309965] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:14:23,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577110924] [2023-04-01 03:14:23,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:23,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:14:23,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:14:23,456 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:14:23,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 03:14:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:23,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 03:14:23,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:14:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 118 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-04-01 03:14:23,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:14:24,156 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 107 proven. 15 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-04-01 03:14:24,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577110924] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:14:24,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1767404564] [2023-04-01 03:14:24,172 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-04-01 03:14:24,173 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:14:24,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:14:24,178 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:14:24,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:14:24,337 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-04-01 03:14:46,178 WARN L223 SmtUtils]: Spent 19.71s on a formula simplification that was a NOOP. DAG size: 1347 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)